FM broadcasting is a method of radio broadcasting that uses frequency modulation ( FM ) of the radio broadcast carrier wave. Invented in 1933 by American engineer Edwin Armstrong , wide-band FM is used worldwide to transmit high-fidelity sound over broadcast radio . FM broadcasting offers higher fidelity—more accurate reproduction of the original program sound—than other broadcasting techniques, such as AM broadcasting . It is also less susceptible to common forms of interference , having less static and popping sounds than are often heard on AM. Therefore, FM is used for most broadcasts of music and general audio (in the audio spectrum). FM radio stations use the very high frequency range of radio frequencies .
154-554: BBC Local Radio (also referred to as Local BBC Radio ) is the BBC 's local and regional radio division for England and the Channel Islands , consisting of forty stations. As of December 2023, the network broadcasts to a combined audience of 6.9 million, with a listening share of 4.9%, according to RAJAR . The popularity of pirate radio was to challenge a change within the at the time very "stiff" and blinkered management at
308-488: A brand new custom-made jingle package by Reelworld, based in MediaCity UK , Salford . The new jingle package was rolled out to all BBC Local Radio stations over the course of the year, alongside a refreshed "on air" sound to help encourage younger listeners to the station. The new station branding also incorporates a new tag line, "The Sound of *area of coverage*, and all the music you love". The new jingle package marked
462-722: A censorship apparatus for the inevitability of war. Due to the BBC's advancements in shortwave radio technology, the corporation could broadcast across the world during the Second World War. Within Europe, the BBC European Service would gather intelligence and information regarding the current events of the war in English. Regional BBC workers, based on their regional geo-political climate, would then further censor
616-869: A further eight BBC Local Radio stations - BBC Essex , BBC Radio Cambridgeshire , BBC Radio Devon , BBC Radio Leeds , BBC Radio Sheffield , BBC Hereford & Worcester , BBC Radio Stoke and BBC Radio Lancashire - stopped broadcasting on MW. As of May 2024, only BBC Radio Cumbria (in North Cumbria and South Cumbria), BBC Radio Derby , BBC Radio Gloucestershire , BBC Radio Guernsey , BBC Radio Jersey , BBC Radio Norfolk (in West Norfolk ) and BBC Radio Somerset , still broadcast on MW. Due to sports rights broadcasting restrictions, some commentaries are not available on BBC Sounds. In this instance, an alternative national programme will usually be broadcast on Saturday afternoons. Overnight events are replaced by
770-469: A larger brand: in 2003, BBC Choice was replaced by BBC Three , with programming for younger adults and shocking real-life documentaries, BBC News 24 became the BBC News Channel in 2008, and BBC Radio 7 became BBC Radio 4 Extra in 2011, with new programmes to supplement those broadcast on Radio 4. In 2008, another channel was launched, BBC Alba , a Scottish Gaelic service. During this decade,
924-516: A looping message explaining this is broadcast. A list of the forty local radio stations by region . In addition to these stations, BBC Radio Solent operates an opt-out service covering Dorset . There were also opt-out services covering Milton Keynes ( BBC Three Counties Radio ), Peterborough and the Fens ( BBC Radio Cambridgeshire ), Plymouth ( BBC Radio Devon ), and Swindon ( BBC Wiltshire ); but these ceased in 2012 due to cutbacks as part of
1078-514: A monophonic broadcast, again the most common permitted maximum deviation is ±75 kHz. However, some countries specify a lower value for monophonic broadcasts, such as ±50 kHz. The bandwidth of an FM transmission is given by the Carson bandwidth rule which is the sum of twice the maximum deviation and twice the maximum modulating frequency. For a transmission that includes RDS this would be 2 × 75 kHz + 2 × 60 kHz = 270 kHz . This
1232-607: A news and information service. In 1978, BBC staff went on strike just before the Christmas, thus blocking out the transmission of both channels and amalgamating all four radio stations into one. Since the deregulation of the UK television and radio market in the 1980s, the BBC has faced increased competition from the commercial sector (and from the advertiser-funded public service broadcaster Channel 4 ), especially on satellite television, cable television, and digital television services. In
1386-493: A number of additional channels and radio stations have been launched: Radio 5 was launched in 1990, as a sports and educational station, but was replaced in 1994, with BBC Radio 5 Live to become a live radio station, following the success of the Radio 4 service to cover the 1991 Gulf War . The new station would be a news and sport station. In 1997, BBC News 24 , a rolling news channel, launched on digital television services, and
1540-557: A program feed for AM transmitters of AM/FM stations. SCA subcarriers are typically 67 kHz and 92 kHz. Initially the users of SCA services were private analog audio channels which could be used internally or leased, for example Muzak -type services. There were experiments with quadraphonic sound. If a station does not broadcast in stereo, everything from 23 kHz on up can be used for other services. The guard band around 19 kHz (±4 kHz) must still be maintained, so as not to trigger stereo decoders on receivers. If there
1694-744: A proposal to cut 4,000 jobs, and to privatise parts of the BBC, disrupted much of the BBC's regular programming. In 2006, BBC HD launched as an experimental service and became official in December 2007. The channel broadcast HD simulcasts of programmes on BBC One , BBC Two , BBC Three and BBC Four as well as repeats of some older programmes in HD. In 2010, an HD simulcast of BBC One launched: BBC One HD . The channel uses HD versions of BBC One's schedule and uses upscaled versions of programmes not currently produced in HD. The BBC HD channel closed in March 2013 and
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#17327937051711848-555: A series of strikes; however, the BBC stated that the cuts were essential to move the organisation forward and concentrate on increasing the quality of programming. On 20 October 2010, the Chancellor of the Exchequer George Osborne announced that the television licence fee would be frozen at its current level until the end of the current charter in 2016. The same announcement revealed that the BBC would take on
2002-473: A studio-to-transmitter link system. In April 1935, the AM subcarriers were replaced by FM subcarriers, with much improved results. The first FM subcarrier transmissions emanating from Major Armstrong's experimental station KE2XCC at Alpine, New Jersey occurred in 1948. These transmissions consisted of two-channel audio programs, binaural audio programs and a fax program. The original subcarrier frequency used at KE2XCC
2156-457: A three note jingle package produced by Mcasso Music Production was gradually rolled out across the network, and was in use by all BBC Local Radio stations. Mcasso also updated the imaging in October 2015 which was launched by BBC Radio London (on the day of the station's 45th anniversary) replacing the three-note package with a six-note package. In January 2020, BBC Radio Leicester launched
2310-525: Is added. VHF radio waves usually do not travel far beyond the visual horizon , so reception distances for FM stations are typically limited to 30–40 miles (50–60 km). They can also be blocked by hills and to a lesser extent by buildings. Individuals with more-sensitive receivers or specialized antenna systems, or who are located in areas with more favorable topography, may be able to receive useful FM broadcast signals at considerably greater distances. The knife edge effect can permit reception where there
2464-422: Is also known as the necessary bandwidth . Random noise has a triangular spectral distribution in an FM system, with the effect that noise occurs predominantly at the higher audio frequencies within the baseband . This can be offset, to a limited extent, by boosting the high frequencies before transmission and reducing them by a corresponding amount in the receiver. Reducing the high audio frequencies in
2618-408: Is amplitude modulated onto a 38 kHz double-sideband suppressed-carrier (DSB-SC) signal, thus occupying 23 kHz to 53 kHz. A 19 kHz ± 2 Hz pilot tone , at exactly half the 38 kHz sub-carrier frequency and with a precise phase relationship to it, as defined by the formula below, is also generated. The pilot is transmitted at 8–10% of overall modulation level and used by
2772-422: Is authorized for "hybrid" mode operation, wherein both the conventional analog FM carrier and digital sideband subcarriers are transmitted. The output power of an FM broadcasting transmitter is one of the parameters that governs how far a transmission will cover. The other important parameters are the height of the transmitting antenna and the antenna gain . Transmitter powers should be carefully chosen so that
2926-682: Is available as a listen-again service on BBC Sounds . England Unwrapped was launched in 2019 and shares stories made by Local Radio teams. BBC The British Broadcasting Corporation ( BBC ) is a British public service broadcaster headquartered at Broadcasting House in London , England. Originally established in 1922 as the British Broadcasting Company , it evolved into its current state with its current name on New Year's Day 1927. The oldest and largest local and global broadcaster by stature and by number of employees,
3080-596: Is designed to be capable of use alongside ARI despite using identical subcarrier frequencies. In the United States and Canada , digital radio services are deployed within the FM band rather than using Eureka 147 or the Japanese standard ISDB . This in-band on-channel approach, as do all digital radio techniques, makes use of advanced compressed audio . The proprietary iBiquity system, branded as HD Radio ,
3234-480: Is mainly the preserve of talk radio, news, sports, religious programming, ethnic (minority language) broadcasting and some types of minority interest music. This shift has transformed AM into the "alternative band" that FM once was. (Some AM stations have begun to simulcast on, or switch to, FM signals to attract younger listeners and aid reception problems in buildings, during thunderstorms, and near high-voltage wires. Some of these stations now emphasize their presence on
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#17327937051713388-671: Is no direct line of sight between broadcaster and receiver. The reception can vary considerably depending on the position. One example is the Učka mountain range, which makes constant reception of Italian signals from Veneto and Marche possible in a good portion of Rijeka , Croatia, despite the distance being over 200 km (125 miles). Other radio propagation effects such as tropospheric ducting and Sporadic E can occasionally allow distant stations to be intermittently received over very large distances (hundreds of miles), but cannot be relied on for commercial broadcast purposes. Good reception across
3542-500: Is obviously of paramount importance." Reith succeeded in building a high wall against an American-style free-for-all in radio in which the goal was to attract the largest audiences and thereby secure the greatest advertising revenue. There was no paid advertising on the BBC; all the revenue came from a tax on receiving sets. Highbrow audiences, however, greatly enjoyed it. At a time when American, Australian and Canadian stations were drawing huge audiences cheering for their local teams with
3696-496: Is only suitable for text. A few proprietary systems are used for private communications. A variant of RDS is the North American RBDS or "smart radio" system. In Germany the analog ARI system was used prior to RDS to alert motorists that traffic announcements were broadcast (without disturbing other listeners). Plans to use ARI for other European countries led to the development of RDS as a more powerful system. RDS
3850-504: Is performed by a decoder, built into stereo receivers. Again, the decoder can use a switching technique to recover the left and right channels. In addition, for a given RF level at the receiver, the signal-to-noise ratio and multipath distortion for the stereo signal will be worse than for the mono receiver. For this reason many stereo FM receivers include a stereo/mono switch to allow listening in mono when reception conditions are less than ideal, and most car radios are arranged to reduce
4004-557: Is related to the transmitter 's RF power, the antenna gain , and antenna height . Interference from other stations is also a factor in some places. In the U.S, the FCC publishes curves that aid in calculation of this maximum distance as a function of signal strength at the receiving location. Computer modelling is more commonly used for this around the world. Many FM stations, especially those located in severe multipath areas, use extra audio compression /processing to keep essential sound above
4158-408: Is responsible for operational management and delivery of services within a framework set by the board, and is chaired by the director-general , currently Tim Davie , who is chief executive and (from 1994) editor-in-chief. The corporation has the following in-house divisions covering the BBC's output and operations: FM broadcasting Throughout the world, the FM broadcast band falls within
4312-630: Is stereo, there will typically be a guard band between the upper limit of the DSBSC stereo signal (53 kHz) and the lower limit of any other subcarrier. Digital data services are also available. A 57 kHz subcarrier ( phase locked to the third harmonic of the stereo pilot tone) is used to carry a low-bandwidth digital Radio Data System signal, providing extra features such as station name, alternative frequency (AF), traffic data for satellite navigation systems and radio text (RT). This narrowband signal runs at only 1,187.5 bits per second , thus
4466-427: Is used. This applies to both mono and stereo transmissions. For stereo, pre-emphasis is applied to the left and right channels before multiplexing . The use of pre-emphasis becomes a problem because many forms of contemporary music contain more high-frequency energy than the musical styles which prevailed at the birth of FM broadcasting. Pre-emphasizing these high-frequency sounds would cause excessive deviation of
4620-642: The Archbishops of Canterbury and York came to St Paul's to broadcast to the UK and the world on the National Day of Prayer. BBC employees during the war included George Orwell who spent two years with the broadcaster. During his role as prime minister during the war, Winston Churchill delivered 33 major wartime speeches by radio, all of which were carried by the BBC within the UK. On 18 June 1940, French general Charles de Gaulle , in exile in London as
4774-598: The BBC Television Service ) started from Alexandra Palace in November 1936, alternating between an improved Baird mechanical 240-line system and the all-electronic 405-line Marconi-EMI system which had been developed by an EMI research team led by Sir Isaac Shoenberg . The superiority of the electronic system saw the mechanical system dropped early the following year, with the Marconi-EMI system
BBC Local Radio - Misplaced Pages Continue
4928-527: The FM waveband , and not on the more widely available AM waveband . This was eventually rectified a few years after the creation of these new channels. Independent Local Radio (ILR) launched nationally in 1973, with nineteen stations; more followed in subsequent years. As a result, many of the BBC Local Radio stations found themselves in direct competition with commercial competitors that utilised many of
5082-547: The Light Programme , Third Programme and Home Service . These three networks used the sub-band 88.0–94.6 MHz. The sub-band 94.6–97.6 MHz was later used for BBC and local commercial services. However, only when commercial broadcasting was introduced to the UK in 1973 did the use of FM pick up in Britain. With the gradual clearance of other users (notably Public Services such as police, fire and ambulance) and
5236-958: The MediaCityUK development in Salford , with BBC Three moving online only in 2016, the sharing of more programmes between stations and channels, sharing of radio news bulletins, more repeats in schedules, including the whole of BBC Two daytime and for some original programming to be reduced. BBC HD was closed on 26 March 2013, and replaced with an HD simulcast of BBC Two; however, flagship programmes, other channels and full funding for CBBC and CBeebies would be retained. Numerous BBC facilities have been sold off, including New Broadcasting House on Wilmslow Road in Manchester. Many major departments have been relocated to Broadcasting House in central London and MediaCityUK in Salford, particularly since
5390-639: The VHF part of the radio spectrum . Usually 87.5 to 108.0 MHz is used, or some portion of it, with few exceptions: The frequency of an FM broadcast station (more strictly its assigned nominal center frequency) is usually a multiple of 100 kHz. In most of South Korea , the Americas , the Philippines , and the Caribbean , only odd multiples are used. Some other countries follow this plan because of
5544-492: The 1970s and 1980s: A commercially unsuccessful noise reduction system used with FM radio in some countries during the late 1970s, Dolby FM was similar to Dolby B but used a modified 25 μs pre-emphasis time constant and a frequency selective companding arrangement to reduce noise. The pre-emphasis change compensates for the excess treble response that otherwise would make listening difficult for those without Dolby decoders. A similar system named High Com FM
5698-514: The 2005 Frank Gillard Awards for BBC Local Radio, the corporation hired two actors to represent the fictional couple and award a prize to the "Receptionist of the Year". Mia Costello of BBC Radio Solent wrote a controversial internal memo in October 2006, re-stating the importance of these characters. She wrote: "Whatever job you do on station, make sure this week, you broadcast to Dave and Sue – people in their fifties. Only put on callers sounding in
5852-523: The 2025–26 season of the Women's Super League campaign. The BBC is a statutory corporation , independent from direct government intervention, with its activities being overseen from April 2017 by the BBC Board and regulated by Ofcom . The chairman is Samir Shah. The BBC is a state owned public broadcasting company and operates under a royal charter . The charter is the constitutional basis for
6006-488: The 45–64 range. I don't want to hear really elderly voices. Only talk about things that are positive and appealing to people in this age range. Only do caller round ups about people in this age range." This was reprinted the following month in the Southern Daily Echo , following which a BBC spokesperson commented "Out of context these notes sound harsh and we apologise if they offend anyone." BBC Local Radio
6160-467: The BBC announced a BBC News savings target of £80 million per year by 2022, involving about 520 staff reductions. The BBC's director of news and current affairs Fran Unsworth said there would be further moves toward digital broadcasting, in part to attract back a youth audience, and more pooling of reporters to stop separate teams covering the same news. In 2020, the BBC reported a £119 million deficit because of delays to cost reduction plans, and
6314-542: The BBC employs over 21,000 staff in total, of whom approximately 17,200 are in public-sector broadcasting. The BBC was established under a royal charter , and operates under an agreement with the Secretary of State for Culture, Media and Sport . Its work is funded principally by an annual television licence fee which is charged to all British households, companies, and organisations using any type of equipment to receive or record live television broadcasts or to use
BBC Local Radio - Misplaced Pages Continue
6468-515: The BBC has played a prominent role in British life and culture. It is sometimes informally referred to as the Beeb or Auntie . In 1923 it launched Radio Times (subtitled "The official organ of the BBC"), the first broadcast listings magazine; the 1988 Christmas edition sold 11 million copies, the biggest-selling edition of any British magazine in history. Britain's first live public broadcast
6622-585: The BBC is subject to an additional 'Agreement' between it and the Culture Secretary , and that its operating licence is to be set by Ofcom, an external regulatory body . It used to be that the Home Secretary be departmental to both Agreement as well as Licence, and regulatory duties fall to the BBC Trust , but the 2017 charter changed those 2007 arrangements. The charter, too, outlines
6776-771: The BBC released minutes of the board meeting which led to Greg Dyke's resignation. Unlike the other departments of the BBC, the BBC World Service was funded by the Foreign, Commonwealth and Development Office . The Foreign and Commonwealth Office, more commonly known as the Foreign Office or the FCO, is the British government department responsible for promoting the interests of the United Kingdom abroad. A strike in 2005 by more than 11,000 BBC workers, over
6930-760: The BBC said that the trial switch-off attracted very few complaints from listeners. In 2018, the MW transmissions of BBC Radios Sussex , Surrey , Humberside , Wiltshire , Nottingham, Kent and Lincolnshire ended and MW coverage for Radios Devon, Lancashire and Essex was reduced. Altogether, thirteen MW transmitters were switched off. In 2020, the MW transmissions of BBC Radio Cornwall , BBC Radio Newcastle , BBC Radio Merseyside , BBC Radio Solent , BBC Three Counties Radio and BBC Radio York ended, BBC Radio Cumbria stopped broadcasting on MW in Whitehaven and BBC Radio Norfolk 's Norwich MW transmitter went silent. In 2021,
7084-440: The BBC suddenly became the primary source of news for the duration of the crisis. The crisis placed the BBC in a delicate position. On the one hand Reith was acutely aware that the government might exercise its right to commandeer the BBC at any time as a mouthpiece of the government if the BBC were to step out of line, but on the other he was anxious to maintain public trust by appearing to be acting independently. The government
7238-480: The BBC was granted sufficient leeway to pursue the government's objectives largely in a manner of its own choosing. Supporters of the strike nicknamed the BBC the BFC for British Falsehood Company. Reith personally announced the end of the strike which he marked by reciting from Blake's " Jerusalem " signifying that England had been saved. While the BBC tends to characterise its coverage of the general strike by emphasising
7392-536: The BBC", was priced at tuppence (two pence ) on newsstands, and quickly sold out its run of a quarter of a million copies. Mid-1925 found the future of broadcasting under further consideration, this time by the Crawford committee. By now, the BBC, under Reith's leadership, had forged a consensus favouring a continuation of the unified (monopoly) broadcasting service, but more money was still required to finance rapid expansion. Wireless manufacturers were anxious to exit
7546-555: The BBC's "Delivering Quality First" programme. The stations were launched progressively; starting with BBC Radio Leicester on 8 November 1967, with the last station to launch being the short-lived BBC Dorset FM on 26 April 1993. Since then, many stations have been merged and renamed but no new stations have been created where no service previously existed, as plans to launch stations in unserved areas, most notably in Cheshire , have not materialised. Between October 2009 and April 2012,
7700-464: The BBC's airwaves. In 1937, a MI5 security officer was given a permanent office within the organisation. This officer would examine the files of potential political subversives and mark the files of those deemed a security risk to the organisation, blacklisting them. This was often done on spurious grounds; even so, the practice would continue and expand during the years of the Cold War. There
7854-540: The BBC's censorship office, which surveilled and edited American coverage of British affairs. By 1940, across all BBC broadcasts, music by composers from enemy nations was censored. In total, 99 German, 38 Austrian and 38 Italian composers were censored. The BBC argued that like the Italian or German languages, listeners would be irritated by the inclusion of enemy composers. Any potential broadcasters said to have pacifist, communist or fascist ideologies were not allowed on
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#17327937051718008-447: The BBC's local stations were broadcast only on VHF. The start of the 1990s saw new stations, once again, launching only on FM and in 1992 and 1993, six MW transmitters - BBC Radio Cleveland , BBC Radio Northampton , BBC Radio Oxford , BBC GLR , BBC GMR and one of BBC Radio Nottingham and BBC WM 's transmitters - were switched off although three, including BBC GLR's MW frequency, were re-allocated for use by commercial radio. In 1996,
8162-516: The BBC's revenue comes from its commercial subsidiary BBC Studios (formerly BBC Worldwide ), which sells BBC programmes and services internationally and also distributes the BBC's international 24-hour English-language news services BBC News , and from BBC.com, provided by BBC Global News Ltd. In 2009, the company was awarded the Queen's Award for Enterprise in recognition of its international achievements in business. Since its formation in 1922,
8316-707: The BBC's streaming service, iPlayer . The fee is set by the British Government , agreed by Parliament , and is used to fund the BBC's radio, TV, and online services covering the nations and regions of the UK. Since 1 April 2014, it has also funded the BBC World Service (launched in 1932 as the BBC Empire Service), which broadcasts in 28 languages and provides comprehensive TV, radio, and online services in Arabic and Persian . Some of
8470-522: The BBC, and sets out the BBC's Object, Mission and Public Purposes. It emphasises public service , (limited) editorial independence , prohibits advertising on domestic services and proclaims the BBC is to "seek to avoid adverse impacts on competition which are not necessary for the effective fulfilment of the Mission and the promotion of the Public Purposes". The charter also sets out that
8624-407: The BBC. Each station produces local programmes on weekdays from 6am until 2pm. Depending on location and population, afternoon, evening and weekend schedules will vary from shared regional programmes to being fully local although sports coverage continues to remain local. Since October 2023, all stations take the all England Late Show which originates in London or Manchester. and since November 2023,
8778-470: The BBC. The most prominent concession by the BBC was the creation of BBC Radio 1 to satisfy the ever-demanding new youth culture with their thirst for new, popular music. The other, however, was that these pirate radio stations were, in some cases, local. As a result, BBC Local Radio began as an experiment. Initially, stations had to be co-funded by the BBC and local authorities , which only some Labour -controlled areas proved willing to do. Radio Leicester
8932-586: The British government's asylum policy on social media. Lineker was suspended from his position on Match of the Day before being re-instated after receiving overwhelming support from his colleagues. The scandal was made worse due to the connections between BBC's chairman, Richard Sharp, and the Conservative Party. In April 2023, Richard Sharp resigned as chairman after a report found he did not disclose potential perceived conflicts of interest in his role in
9086-506: The CBBC Channel and CBeebies Channel. In addition to the television channels, new digital radio stations were created: 1Xtra , 6 Music and Radio 4 Extra . BBC 1Xtra was a sister station to Radio 1 and specialised in modern black music, BBC 6 Music specialised in alternative music genres and BBC7 specialised in archive, speech and children's programming. The following few years resulted in repositioning of some channels to conform to
9240-701: The Corporation's governance and regulatory arrangements as a statutory corporation, including the role and composition of the BBC Board. The current Charter began on 1 January 2017 and ends on 31 December 2027; the Agreement being coterminous. The BBC Board was formed in April 2017. It replaced the previous governing body, the BBC Trust, which itself had replaced the board of governors in 2007. The board sets
9394-665: The FCC announced the reassignment of the FM band to 90 channels from 88–106 MHz (which was soon expanded to 100 channels from 88–108 MHz). This shift, which the AM-broadcaster RCA had pushed for, made all the Armstrong-era FM receivers useless and delayed the expansion of FM. In 1961 WEFM (in the Chicago area) and WGFM (in Schenectady, New York ) were reported as the first stereo stations. By
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#17327937051719548-705: The FCC rules do not allow this mode of stereo operation. In 1969, Louis Dorren invented the Quadraplex system of single station, discrete, compatible four-channel FM broadcasting. There are two additional subcarriers in the Quadraplex system, supplementing the single one used in standard stereo FM. The baseband layout is as follows: The normal stereo signal can be considered as switching between left and right channels at 38 kHz, appropriately band-limited. The quadraphonic signal can be considered as cycling through LF, LR, RF, RR, at 76 kHz. Early efforts to transmit discrete four-channel quadraphonic music required
9702-579: The FCC. The original Dorren Quadraplex System outperformed all the others and was chosen as the national standard for Quadraphonic FM broadcasting in the United States. The first commercial FM station to broadcast quadraphonic program content was WIQB (now called WWWW-FM ) in Ann Arbor / Saline, Michigan under the guidance of Chief Engineer Brian Jeffrey Brown. Various attempts to add analog noise reduction to FM broadcasting were carried out in
9856-456: The FM carrier . Modulation control (limiter) devices are used to prevent this. Systems more modern than FM broadcasting tend to use either programme-dependent variable pre-emphasis; e.g., dbx in the BTSC TV sound system, or none at all. Pre-emphasis and de-emphasis was used in the earliest days of FM broadcasting. According to a BBC report from 1946, 100 μs was originally considered in
10010-520: The FM band.) The medium wave band (known as the AM band because most stations using it employ amplitude modulation) was overcrowded in western Europe, leading to interference problems and, as a result, many MW frequencies are suitable only for speech broadcasting. Belgium , the Netherlands , Denmark and particularly Germany were among the first countries to adopt FM on a widespread scale. Among
10164-979: The FM radio band from 87.5-108.0 MHz to 76.1-108.0 MHz to enable the migration of AM radio stations in Brazilian capitals and large cities. FM broadcasting began in the late 1930s, when it was initiated by a handful of early pioneer experimental stations, including W1XOJ/W43B/WGTR (shut down in 1953) and W1XTG/ WSRS , both transmitting from Paxton, Massachusetts (now listed as Worcester, Massachusetts ); W1XSL/W1XPW/W65H/WDRC-FM/WFMQ/WHCN , Meriden, Connecticut; and W2XMN , KE2XCC , and WFMN , Alpine, New Jersey (owned by Edwin Armstrong himself, closed down upon Armstrong's death in 1954). Also of note were General Electric stations W2XDA Schenectady and W2XOY New Scotland, New York—two experimental FM transmitters on 48.5 MHz—which signed on in 1939. The two began regular programming, as W2XOY, on November 20, 1940. Over
10318-660: The GPO and the BBC had become deadlocked and the Postmaster General commissioned a review of broadcasting by the Sykes Committee. The committee recommended a short-term reorganisation of licence fees with improved enforcement in order to address the BBC's immediate financial distress, and an increased share of the licence revenue split between it and the GPO. This was to be followed by a simple 10 shillings licence fee to fund broadcasts. The BBC's broadcasting monopoly
10472-414: The L+R signal so the listener will hear both channels through the single loudspeaker. A stereo receiver will add the difference signal to the sum signal to recover the left channel, and subtract the difference signal from the sum to recover the right channel. The (L+R) signal is limited to 30 Hz to 15 kHz to protect a 19 kHz pilot signal. The (L−R) signal, which is also limited to 15 kHz,
10626-441: The MW frequencies of BBC Radio Leicester and BBC WM were handed over to the BBC Asian Network . MW transmitter closures began again in 2012, initially as a five-week trial to find out if listeners would miss or complain about the lack of AM services. Two of the four transmitters partaking in the trial - BBC Radio Nottingham's MW transmitter and BBC Radio Kent 's relay at Rusthall near Tunbridge Wells - remained off-air after
10780-441: The Prime Minister, maintained the censorship of editorial opinions on public policy, but allowed the BBC to address matters of religious, political or industrial controversy. The resulting political "talk series", designed to inform England on political issues, were criticised by members of parliament, including Winston Churchill, David Lloyd George and Sir Austen Chamberlain . Those who opposed these chats claimed that they silence
10934-465: The Sunday evening show is also carried on all stations. All local BBC radio stations simulcast BBC Radio 5 Live from 0100 until 0600. All of the BBC Local Radio stations broadcast on FM , digital radio , Freeview and BBC Sounds in their respective areas across England, but BBC Radio London is also available on Freesat and Virgin Media . Also, until the start of the 1990s, all BBC stations used to broadcast on medium wave although initially,
11088-501: The UK's first Independent local radio station, LBC came on-air in the London area. As a result of the Pilkington Committee report of 1962, in which the BBC was praised for the quality and range of its output, and ITV was very heavily criticised for not providing enough quality programming, the decision was taken to award the BBC a second television channel, BBC2 , in 1964, renaming the existing service BBC1 . BBC2 used
11242-642: The US, but 75 μs subsequently adopted. Long before FM stereo transmission was considered, FM multiplexing of other types of audio-level information was experimented with. Edwin Armstrong, who invented FM, was the first to experiment with multiplexing, at his experimental 41 MHz station W2XDG located on the 85th floor of the Empire State Building in New York City . These FM multiplex transmissions started in November 1934 and consisted of
11396-530: The United States, the GPO proposed that it would issue a single broadcasting licence to a company jointly owned by a consortium of leading wireless receiver manufacturers, to be known as the British Broadcasting Company Ltd , which was formed on 18 October 1922. John Reith , a Scottish Calvinist , was appointed its general manager in December 1922 a few weeks after the company made its first official broadcast. L. Stanton Jefferies
11550-629: The air and forced the British government finally to regulate radio services to permit nationally based advertising-financed services. In response, the BBC reorganised and renamed their radio channels. On 30 September 1967, the Light Programme was split into Radio 1 offering continuous "Popular" music and Radio 2 more "Easy Listening". The "Third" programme became Radio 3 offering classical music and cultural programming. The Home Service became Radio 4 offering news, and non-musical content such as quiz shows, readings, dramas and plays. As well as
11704-454: The assigned frequency. There are other unusual and obsolete FM broadcasting standards in some countries, with non-standard spacings of 1, 10, 30, 74, 500, and 300 kHz. To minimise inter-channel interference, stations operating from the same or nearby transmitter sites tend to keep to at least a 500 kHz frequency separation even when closer frequency spacing is technically permitted. The ITU publishes Protection Ratio graphs, which give
11858-518: The background noise for listeners, often at the expense of overall perceived sound quality. In such instances, however, this technique is often surprisingly effective in increasing the station's useful range. The first radio station to broadcast in FM in Brazil was Rádio Imprensa, which began broadcasting in Rio de Janeiro in 1955, on the 102.1 MHz frequency, founded by businesswoman Anna Khoury. Due to
12012-462: The broadcast of baseball, rugby and hockey, the BBC emphasised service for a national rather than a regional audience. Boat races were well covered along with tennis and horse racing, but the BBC was reluctant to spend its severely limited air time on long football or cricket games, regardless of their popularity. John Reith and the BBC, with support from the Crown , determined the universal needs of
12166-402: The carrier, with its frequency remaining constant. With FM, frequency deviation from the assigned carrier frequency at any instant is directly proportional to the amplitude of the (audio) input signal, determining the instantaneous frequency of the transmitted signal. Because transmitted FM signals use significantly more bandwidth than AM signals, this form of modulation is commonly used with
12320-631: The challenge of better reflecting and representing a changing UK". Since 2017, the BBC has also funded the Local Democracy Reporting Service , with up to 165 journalists employed by independent news organisations to report on local democracy issues on a pooled basis. In 2016, the BBC Director General Tony Hall announced a savings target of £800 million per year by 2021, which is about 23% of annual licence fee revenue. Having to take on
12474-469: The closure of BBC Television Centre in March 2013. On 16 February 2016, the BBC Three television service was discontinued and replaced by a digital outlet under the same name, targeting its young adult audience with web series and other content. Under the new royal charter instituted in 2017, the corporation must publish an annual report to Ofcom, outlining its plans and public service obligations for
12628-408: The corporation began to sell off a number of its operational divisions to private owners; BBC Broadcast was spun off as a separate company in 2002, and in 2005, it was sold off to Australian -based Macquarie Capital Alliance Group and Macquarie Group Limited and rebranded Red Bee Media . The BBC's IT , telephony and broadcast technology were brought together as BBC Technology Ltd in 2001, and
12782-431: The country is one of the main advantages over DAB/+ radio . This is still less than the range of AM radio waves, which because of their lower frequencies can travel as ground waves or reflect off the ionosphere , so AM radio stations can be received at hundreds (sometimes thousands) of miles. This is a property of the carrier wave's typical frequency (and power), not its mode of modulation. The range of FM transmission
12936-561: The division was later sold to the German company Siemens IT Solutions and Services (SIS). SIS was subsequently acquired from Siemens by the French company Atos . Further divestments included BBC Books (sold to Random House in 2006); BBC Outside Broadcasts Ltd (sold in 2008 to Satellite Information Services ); Costumes and Wigs (stock sold in 2008 to Angels Costumes ); and BBC Magazines (sold to Immediate Media Company in 2011). After
13090-567: The extension of the FM band to 108.0 MHz between 1980 and 1995, FM expanded rapidly throughout the British Isles and effectively took over from LW and MW as the delivery platform of choice for fixed and portable domestic and vehicle-based receivers. In addition, Ofcom (previously the Radio Authority) in the UK issues on demand Restricted Service Licences on FM and also on AM (MW) for short-term local-coverage broadcasting which
13244-407: The facilitation of a loan to Prime Minister Boris Johnson . Dame Elan Closs Stephens was appointed as acting chairwoman on 27 June 2023, and she would lead the BBC board for a year or until a new permanent chair has been appointed. Samir Shah was subsequently appointed with effect from 4 March 2024. In October 2024 it was announced that the BBC along with Sky Sports signed a deal to broadcast
13398-447: The first fully electronic television system in the world to be used in regular broadcasting. The success of broadcasting provoked animosities between the BBC and well-established media such as theatres, concert halls and the recording industry. By 1929, the BBC complained that the agents of many comedians refused to sign contracts for broadcasting, because they feared it harmed the artist "by making his material stale" and that it "reduces
13552-472: The first time in ten years that "sung jingles" were used in the stations' on air branding. Dave and Sue are two fictional radio listeners created as marketing personas . Descriptions of the characters, created by the BBC, were given to all their local radio presenters as representative target listeners during the 2000s. They were later superseded by the "BBC Local Radio 2010" strategy. The characters were created as part of "Project Bullseye". Its stated aim
13706-429: The following year, BBC Choice was launched as the third general entertainment channel from the BBC. The BBC also purchased The Parliamentary Channel, which was renamed BBC Parliament . In 1999, BBC Knowledge launched as a multimedia channel, with services available on the newly launched BBC Text digital teletext service (later rebranded as BBC Red Button), and on BBC Online . The channel had an educational aim, which
13860-458: The forthcoming ending of the remaining £253 million funding towards pensioner licence fees would increase financial pressures. In January 2021, it was reported that former banker Richard Sharp would succeed David Clementi , as chairman, when he stepped down in February. In March 2023, the BBC was at the centre of a political row with football pundit Gary Lineker , after he criticised
14014-506: The four national channels, a series of local BBC radio stations were established in 1967, including Radio London . In 1969, the BBC Enterprises department was formed to exploit BBC brands and programmes for commercial spin-off products. In 1979, it became a wholly owned limited company, BBC Enterprises Ltd. In 1974, the BBC's teletext service, Ceefax , was introduced, created initially to provide subtitling, but developed into
14168-578: The full cost of running the BBC World Service and the BBC Monitoring service from the Foreign and Commonwealth Office, and partially finance the Welsh broadcaster S4C . Further cuts were announced on 6 October 2011, so the BBC could reach a total reduction in their budget of 20%, following the licence fee freeze in October 2010, which included cutting staff by 2,000 and sending a further 1,000 to
14322-647: The government. Throughout the 1930s, political broadcasts had been closely monitored by the BBC. In 1935, the BBC censored the broadcasts of Oswald Mosley and Harry Pollitt . Mosley was a leader of the British Union of Fascists , and Pollitt a leader of the Communist Party of Great Britain . They had been contracted to provide a series of five broadcasts on their parties' politics. The BBC, in conjunction with The Foreign Office of Britain, first suspended this series and ultimately cancelled it without
14476-513: The high import costs of FM radio receivers, transmissions were carried out in circuit closed to businesses and stores, which played ambient music offered by radio. Until 1976, Rádio Imprensa was the only station operating in FM in Brazil. From the second half of the 1970s onwards, FM radio stations began to become popular in Brazil, causing AM radio to gradually lose popularity. In 2021, the Brazilian Ministry of Communications expanded
14630-423: The higher ( VHF or UHF ) frequencies used by TV , the FM broadcast band , and land mobile radio systems . The maximum frequency deviation of the carrier is usually specified and regulated by the licensing authorities in each country. For a stereo broadcast, the maximum permitted carrier deviation is invariably ±75 kHz, although a little higher is permitted in the United States when SCA systems are used. For
14784-405: The higher resolution 625-line standard which had been standardised across Europe. BBC2 was broadcast in colour from 1 July 1967 and was joined by BBC1 and ITV on 15 November 1969. The 405-line VHF transmissions of BBC1 (and ITV) were continued for compatibility with older television receivers until 1985. Starting in 1964, a series of pirate radio stations (starting with Radio Caroline ) came on
14938-503: The import of vehicles, principally from the United States, with radios that can only tune to these frequencies. In some parts of Europe , Greenland , and Africa , only even multiples are used. In the United Kingdom , both odd and even are used. In Italy , multiples of 50 kHz are used. In most countries the maximum permitted frequency error of the unmodulated carrier is specified, which typically should be within 2 kHz of
15092-524: The late 1960s, FM had been adopted for broadcast of stereo "A.O.R.—' Album Oriented Rock ' Format", but it was not until 1978 that listenership to FM stations exceeded that of AM stations in North America. In most of the 70s FM was seen as highbrow radio associated with educational programming and classical music, which changed during the 1980s and 1990s when Top 40 music stations and later even country music stations largely abandoned AM for FM. Today AM
15246-549: The late 1980s, the BBC began a process of divestment by spinning off and selling parts of its organisation. In 1988, it sold off the Hulton Press Library, a photographic archive which had been acquired from the Picture Post magazine by the BBC in 1957. The archive was sold to Brian Deutsch and is now owned by Getty Images . In 1987, the BBC decided to centralize its operations by the management team with
15400-686: The leader of the Free French, made a speech, broadcast by the BBC, urging the French people not to capitulate to the Nazis. In October 1940, Princesses Elizabeth and Margaret made their first radio broadcast for the BBC's Children's Hour , addressing other children who had been evacuated from cities. In 1938, John Reith and the Government of the United Kingdom , specifically the Ministry of Information which had been set up for WWII, designed
15554-546: The loss-making consortium, and Reith was keen that the BBC be seen as a public service rather than a commercial enterprise. The recommendations of the Crawford Committee were published in March the following year and were still under consideration by the GPO when the 1926 United Kingdom general strike broke out in May. The strike temporarily interrupted newspaper production, and with restrictions on news bulletins waived,
15708-527: The main channel audio program and three subcarriers : a fax program, a synchronizing signal for the fax program and a telegraph order channel. These original FM multiplex subcarriers were amplitude modulated. Two musical programs, consisting of both the Red and Blue Network program feeds of the NBC Radio Network, were simultaneously transmitted using the same system of subcarrier modulation as part of
15862-516: The main channel signal-to-noise ratio. The GE and Zenith systems, so similar that they were considered theoretically identical, were formally approved by the FCC in April 1961 as the standard stereo FM broadcasting method in the United States and later adopted by most other countries. It is important that stereo broadcasts be compatible with mono receivers. For this reason, the left (L) and right (R) channels are algebraically encoded into sum (L+R) and difference (L−R) signals. A mono receiver will use just
16016-776: The material their broadcasts would cover. Nothing was to be added outside the preordained news items. For example, the BBC Polish Service was heavily censored due to fears of jeopardising relations with the Soviet Union . Controversial topics, i.e. the contested Polish and Soviet border, the deportation of Polish citizens, the arrests of Polish Home Army members and the Katyn massacre , were not included in Polish broadcasts. American radio broadcasts were broadcast across Europe on BBC channels. This material also passed through
16170-405: The minimum spacing between frequencies based on their relative strengths. Only broadcast stations with large enough geographic separations between their coverage areas can operate on the same or close frequencies. Frequency modulation or FM is a form of modulation which conveys information by varying the frequency of a carrier wave ; the older amplitude modulation or AM varies the amplitude of
16324-534: The modest, church-going elderly or a member of the Clergy . Until 1928, entertainers broadcasting on the BBC, both singers and "talkers" were expected to avoid biblical quotations, Clerical impersonations and references, references to drink or Prohibition in the United States , vulgar and doubtful matter and political allusions. The BBC excluded popular foreign music and musicians from its broadcasts, while promoting British alternatives. On 5 March 1928, Stanley Baldwin,
16478-413: The new corporation adopted the coat of arms , including the motto "Nation shall speak peace unto Nation". British radio audiences had little choice apart from the upscale programming of the BBC. Reith, an intensely moralistic executive, was in full charge. His goal was to broadcast "All that is best in every department of human knowledge, endeavour and achievement.... The preservation of a high moral tone
16632-540: The next few years this station operated under the call signs W57A, W87A and WGFM, and moved to 99.5 MHz when the FM band was relocated to the 88–108 MHz portion of the radio spectrum. General Electric sold the station in the 1980s. Today this station is WRVE . Other pioneers included W2XQR/W59NY/WQXQ/WQXR-FM , New York; W47NV/WSM-FM Nashville, Tennessee (signed off in 1951); W1XER/W39B/WMNE , with studios in Boston and later Portland, Maine, but whose transmitter
16786-477: The next year. In its 2017–18 report, released July 2017, the BBC announced plans to "re-invent" its output to better compete against commercial streaming services such as Netflix . These plans included increasing the diversity of its content on television and radio, a major increase in investments towards digital children's content, and plans to make larger investments in Wales, Scotland and Northern Ireland to "rise to
16940-413: The notice of the public. Less radical politicians faced similar censorship. In 1938, Winston Churchill proposed a series of talks regarding British domestic and foreign politics and affairs but was similarly censored. The censorship of political discourse by the BBC was a precursor to the total shutdown of political debate that manifested over the BBC's wartime airwaves. The Foreign Office maintained that
17094-559: The opinions of those in Parliament who are not nominated by Party Leaders or Party Whips, thus stifling independent, non-official views. In October 1932, the policemen of the Metropolitan Police Federation marched in protest at a proposed pay cut. Fearing dissent within the police force and public support for the movement, the BBC censored its coverage of the events, only broadcasting official statements from
17248-433: The originating station. The Crosby system was rejected by the FCC because it was incompatible with existing subsidiary communications authorization (SCA) services which used various subcarrier frequencies including 41 and 67 kHz. Many revenue-starved FM stations used SCAs for "storecasting" and other non-broadcast purposes. The Halstead system was rejected due to lack of high frequency stereo separation and reduction in
17402-407: The people of Britain and broadcast content according to these perceived standards. Reith effectively censored anything that he felt would be harmful, directly or indirectly. While recounting his time with the BBC in 1935, Raymond Postgate claims that BBC broadcasters were made to submit a draft of their potential broadcast for approval. It was expected that they tailored their content to accommodate
17556-462: The popular DJs from the pirate radio stations, and that gained, in most cases, large audiences. Despite this, BBC Local Radio continued to flourish, with the current network in place by the early 1990s. The complement of stations has remained unchanged since that time. The radio stations are operated from locations around the country that usually share with the BBC regional TV news services, and their news gathering bureaux. The stations are operated by
17710-435: The positive impression created by its balanced coverage of the views of government and strikers, Seaton has characterised the episode as the invention of "modern propaganda in its British form". Reith argued that trust gained by 'authentic impartial news' could then be used. Impartial news was not necessarily an end in itself. The BBC did well out of the crisis, which cemented a national audience for its broadcasting, and it
17864-482: The post, with a note saying 'We regret, etc.'" In the 1930s music broadcasts also enjoyed great popularity, for example the friendly and wide-ranging BBC Theatre Organ broadcasts at St George's Hall , London by Reginald Foort , who held the official role of BBC Staff Theatre Organist from 1936 to 1938. Television broadcasting was suspended from 1 September 1939 to 7 June 1946, during the World War II , and it
18018-504: The pressure from these quarters and uneasiness among the staff of the licensing authority, the General Post Office (GPO), was sufficient to lead to a ban on further Chelmsford broadcasts. But by 1922, the GPO had received nearly 100 broadcast licence requests and moved to rescind its ban in the wake of a petition by 63 wireless societies with over 3,000 members. Anxious to avoid the same chaotic expansion experienced in
18172-466: The public should not be aware of their role in the censorship. From 1935 to 1939, the BBC also attempted to unite the British Empire's radio waves, sending staff to Egypt, Palestine , Newfoundland , Jamaica, India, Canada and South Africa. Reith personally visited South Africa, lobbying for state-run radio programmes which was accepted by South African Parliament in 1936. A similar programme
18326-423: The radio and television divisions joining forces together for the first time, the activities of the news and currents departments and coordinated jointly under the new directorate. During the 1990s, this process continued with the separation of certain operational arms of the corporation into autonomous but wholly owned subsidiaries , with the aim of generating additional revenue for programme-making. BBC Enterprises
18480-511: The reasons for this were: Public service broadcasters in Ireland and Australia were far slower at adopting FM radio than those in either North America or continental Europe . Hans Idzerda operated a broadcasting station, PCGG , at The Hague from 1919 to 1924, which employed narrow-band FM transmissions. In the United Kingdom the BBC conducted tests during the 1940s, then began FM broadcasting in 1955, with three national networks:
18634-400: The receiver also reduces the high-frequency noise. These processes of boosting and then reducing certain frequencies are known as pre-emphasis and de-emphasis , respectively. The amount of pre-emphasis and de-emphasis used is defined by the time constant of a simple RC filter circuit. In most of the world a 50 μs time constant is used. In the Americas and South Korea , 75 μs
18788-521: The receiver to identify a stereo transmission and to regenerate the 38 kHz sub-carrier with the correct phase. The composite stereo multiplex signal contains the Main Channel (L+R), the pilot tone, and the (L−R) difference signal. This composite signal, along with any other sub-carriers, modulates the FM transmitter. The terms composite , multiplex and even MPX are used interchangeably to describe this signal. The instantaneous deviation of
18942-476: The region in which the station is based and are the responsibility of the BBC English Regions department, a division of BBC News . The remit for each Local Radio station is the same: to offer a primarily speech-based service; comprising news and information complemented by music. The target audience of BBC Local Radio are listeners aged over fifty, who are not served as well as other age groups on
19096-570: The required area is covered without causing interference to other stations further away. Practical transmitter powers range from a few milliwatts to 80 kW. As transmitter powers increase above a few kilowatts, the operating costs become high and only viable for large stations. The efficiency of larger transmitters is now better than 70% (AC power in to RF power out) for FM-only transmission. This compares to 50% before high efficiency switch-mode power supplies and LDMOS amplifiers were used. Efficiency drops dramatically if any digital HD Radio service
19250-400: The resulting signal is that it alternates between left and right at 38 kHz, with the phase determined by the 19 kHz pilot signal. Most stereo encoders use this switching technique to generate the 38 kHz subcarrier, but practical encoder designs need to incorporate circuitry to deal with the switching harmonics. Converting the multiplex signal back into left and right audio signals
19404-443: The sales of OBs and costumes, the remainder of BBC Resources was reorganised as BBC Studios and Post Production , which continues today as a wholly owned subsidiary of the BBC. The 2004 Hutton Inquiry and the subsequent report raised questions about the BBC's journalistic standards and its impartiality. This led to resignations of senior management members at the time including the then Director General, Greg Dyke . In January 2007,
19558-415: The separation as the signal-to-noise ratio worsens, eventually going to mono while still indicating a stereo signal is received. As with monaural transmission, it is normal practice to apply pre-emphasis to the left and right channels before encoding and to apply de-emphasis at the receiver after decoding. In the U.S. around 2010, using single-sideband modulation for the stereo subcarrier was proposed. It
19712-427: The strategy for the corporation, assesses the performance of the BBC's executive board in delivering the BBC's services, and appoints the director-general. Ofcom is responsible for the regulation of the BBC. The board consists of the following members: The executive committee is responsible for the day-to-day operations of the broadcaster. Consisting of senior managers of the BBC, the committee meets once per month and
19866-531: The top 25 U.S. radio markets to transmit in Quadraplex. The test results hopefully would prove to the FCC that the system was compatible with existing two-channel stereo transmission and reception and that it did not interfere with adjacent stations. There were several variations on this system submitted by GE, Zenith, RCA, and Denon for testing and consideration during the National Quadraphonic Radio Committee field trials for
20020-423: The transmitter carrier frequency due to the stereo audio and pilot tone (at 10% modulation) is where A and B are the pre-emphasized left and right audio signals and f p {\displaystyle f_{p}} =19 kHz is the frequency of the pilot tone. Slight variations in the peak deviation may occur in the presence of other subcarriers or because of local regulations. Another way to look at
20174-537: The use of two FM stations; one transmitting the front audio channels, the other the rear channels. A breakthrough came in 1970 when KIOI ( K-101 ) in San Francisco successfully transmitted true quadraphonic sound from a single FM station using the Quadraplex system under Special Temporary Authority from the FCC . Following this experiment, a long-term test period was proposed that would permit one FM station in each of
20328-563: The value of the artist as a visible music-hall performer". On the other hand, the BBC was "keenly interested" in a cooperation with the recording companies who "in recent years ... have not been slow to make records of singers, orchestras, dance bands, etc. who have already proved their power to achieve popularity by wireless." Radio plays were so popular that the BBC had received 6,000 manuscripts by 1929, most of them written for stage and of little value for broadcasting: "Day in and day out, manuscripts come in, and nearly all go out again through
20482-456: The world as "a dangerous and depressing place". They hope that radio will be "something that will cheer them up and make them laugh". BBC Local Radio staff were given facts and timelines about Dave and Sue, described as "composite listeners". Staff were asked to focus on producing something to which the pair would enjoy listening to. The BBC also produced photographs of the couple, to encourage presenters to visualise their potential listeners. At
20636-519: The £700 million cost for free TV licences for the over-75 pensioners, and rapid inflation in drama and sport coverage costs, was given as the reason. Duplication of management and content spending would be reduced, and there would be a review of BBC News . In September 2019, the BBC launched the Trusted News Initiative to work with news and social media companies to combat disinformation about national elections. In 2020,
20790-426: Was "To develop great radio programming ... we need to know where the centre of our audience target is and be able to focus on it in all we do." Dave and Sue are both 55. Sue is a school secretary , while Dave is a self-employed plumber . They are both divorcees with grown-up children. The characters shop at Asda , and wear casual clothes. The couple have little interest in high culture , or politics , and see
20944-766: Was 27.5 kHz. The IF bandwidth was ±5 kHz, as the only goal at the time was to relay AM radio-quality audio. This transmission system used 75 μs audio pre-emphasis like the main monaural audio and subsequently the multiplexed stereo audio. In the late 1950s, several systems to add stereo to FM radio were considered by the FCC . Included were systems from 14 proponents including Crosby, Halstead, Electrical and Musical Industries, Ltd ( EMI ), Zenith, and General Electric. The individual systems were evaluated for their strengths and weaknesses during field tests in Uniontown, Pennsylvania , using KDKA-FM in Pittsburgh as
21098-442: Was a widely reported urban myth that, upon resumption of the BBC television service after the war, announcer Leslie Mitchell started by saying, "As I was saying before we were so rudely interrupted ..." In fact, the first person to appear when transmission resumed was Jasmine Bligh and the words said were "Good afternoon, everybody. How are you? Do you remember me, Jasmine Bligh ... ?" The European Broadcasting Union
21252-499: Was adopted in Canada. Through collaboration with these state-run broadcasting centres, Reith left a legacy of cultural influence across the empire of Great Britain with his departure from the corporation in 1938. Experimental television broadcasts were started in 1929, using an electromechanical 30-line system developed by John Logie Baird . Limited regular broadcasts using this system began in 1932, and an expanded service (now named
21406-616: Was atop the highest mountain in the northeast United States, Mount Washington , New Hampshire (shut down in 1948); and W9XAO/W55M/WTMJ-FM Milwaukee, Wisconsin (went off air in 1950). A commercial FM broadcasting band was formally established in the United States as of January 1, 1941, with the first fifteen construction permits announced on October 31, 1940. These stations primarily simulcast their AM sister stations, in addition to broadcasting lush orchestral music for stores and offices, classical music to an upmarket listenership in urban areas, and educational programming. On June 27, 1945
21560-414: Was deemed so successful that all of the stations, except BBC Radio Durham, remained on air. More followed in 1970 and 1971: BBC Radio Birmingham , Bristol , Blackburn , Derby , Humberside , London , Manchester , Medway , Newcastle (replacing Radio Durham), Oxford , Solent , and Teesside . Despite the success of this, the original stations were seen as flawed, as they originally only broadcast on
21714-519: Was divided on how to handle the BBC, but ended up trusting Reith, whose opposition to the strike mirrored the PM's own. Although Winston Churchill in particular wanted to commandeer the BBC to use it "to the best possible advantage", Reith wrote that Stanley Baldwin 's government wanted to be able to say "that they did not commandeer [the BBC], but they know that they can trust us not to be really impartial". Thus
21868-671: Was followed by the Government's acceptance of the recommendation made by the Crawford Committee (1925–26) that the British Broadcasting Company be replaced by a non-commercial, Crown-chartered organisation: the British Broadcasting Corporation. The British Broadcasting Corporation came into existence on 1 January 1927, and Reith – newly knighted – was appointed its first director general. To represent its purpose and (stated) values,
22022-479: Was formed on 12 February 1950, in Torquay with the BBC among the 23 founding broadcasting organisations. Competition to the BBC was introduced in 1955, with the commercial and independently operated television network of Independent Television (ITV) . However, the BBC monopoly on radio services would persist until 8 October 1973 when under the control of the newly renamed Independent Broadcasting Authority (IBA),
22176-509: Was its first director of music. The company was to be financed by a royalty on the sale of BBC wireless receiving sets from approved domestic manufacturers. To this day, the BBC aims to follow the Reithian directive to "inform, educate and entertain". The financial arrangements soon proved inadequate. Set sales were disappointing as amateurs made their own receivers and listeners bought rival unlicensed sets. By mid-1923, discussions between
22330-596: Was left to BBC Radio broadcasters such as Reginald Foort to keep the nation's spirits up. The BBC moved most of its radio operations out of London, initially to Bristol , and then to Bedford . Concerts were broadcast from the Bedford Corn Exchange ; the Trinity Chapel in St Paul's Church, Bedford was the studio for the daily service from 1941 to 1945, and, in the darkest days of the war in 1941,
22484-543: Was made explicit for the duration of its current broadcast licence, as was the prohibition on advertising. To avoid competition with newspapers, Fleet Street persuaded the government to ban news bulletins before 7 pm and the BBC was required to source all news from external wire services. The Radio Times , the world's first and longest-running radio and television listings magazine, was launched by Reith in September 1923. The first edition, subtitled "The official organ of
22638-699: Was made from the factory of Marconi Company in Chelmsford in June 1920. It was sponsored by the Daily Mail ' s Alfred Harmsworth, 1st Viscount Northcliffe and featured the famous Australian soprano Dame Nellie Melba . The Melba broadcast caught the people's imagination and marked a turning point in the British public's attitude to radio. However, this public enthusiasm was not shared in official circles where such broadcasts were held to interfere with important military and civil communications. By late 1920,
22792-400: Was modified later on in its life to offer documentaries. In 2002, several television and radio channels were reorganised. BBC Knowledge was replaced by BBC Four and became the BBC's arts and documentaries channel. CBBC , which had been a programming strand as Children's BBC since 1985, was split into CBBC and CBeebies , for younger children, with both new services getting a digital channel:
22946-461: Was reorganised and relaunched in 1995, as BBC Worldwide Ltd. In 1998, BBC studios, outside broadcasts, post production, design, costumes and wigs were spun off into BBC Resources Ltd. The BBC Research & Development has played a major part in the development of broadcasting and recording techniques. The BBC was also responsible for the development of the NICAM stereo standard. In recent decades,
23100-479: Was replaced by BBC Two HD in the same month. On 18 October 2007, BBC Director General Mark Thompson announced a controversial plan to make major cuts and reduce the size of the BBC as an organisation. The plans included a reduction in posts of 2,500; including 1,800 redundancies, consolidating news operations, reducing programming output by 10% and selling off the flagship Television Centre building in London. These plans were fiercely opposed by unions, who threatened
23254-565: Was seen as another service which licensees could use to create additional income. Use of SCAs was particularly popular in the US, but much less so elsewhere. Uses for such subcarriers include radio reading services for the blind , which became common and remain so, private data transmission services (for example sending stock market information to stockbrokers or stolen credit card number denial lists to stores, ) subscription commercial-free background music services for shops, paging ("beeper") services, alternative-language programming, and providing
23408-656: Was tested in Germany between July 1979 and December 1981 by IRT . It was based on the Telefunken High ;Com broadband compander system, but was never introduced commercially in FM broadcasting. Yet another system was the CX -based noise reduction system FMX implemented in some radio broadcasting stations in the United States in the 1980s. FM broadcasting has included subsidiary communications authorization (SCA) services capability since its inception, as it
23562-436: Was the first to launch on 8 November 1967, followed by Leeds , Stoke , Durham , Sheffield , Merseyside , Brighton , and Nottingham . The local authority funding requirement was dropped by the early 1970s, and stations spread across the country; many city-based stations later expanded their remit to cover an entire county. There were eight stations in the initial "experiment", which lasted for two years. When this ended, it
23716-424: Was theorized to be more spectrum-efficient and to produce a 4 dB s/n improvement at the receiver, and it was claimed that multipath distortion would be reduced as well. A handful of radio stations around the country broadcast stereo in this way, under FCC experimental authority. It may not be compatible with very old receivers, but it is claimed that no difference can be heard with most newer receivers. At present,
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