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121-441: Südwestrundfunk ( pronounced [zyːtˈvɛstˌʁʊntfʊŋk] ; lit.   ' Southwest Broadcasting ' ), shortened to SWR ( pronounced [ˌɛsveːˈʔɛʁ] ), is a regional public broadcasting corporation serving the southwest of Germany , specifically the federal states of Baden-Württemberg and Rhineland-Palatinate . The corporation has main offices in three cities: Stuttgart , Baden-Baden and Mainz , with

242-536: A DAB ensemble can be increased by lowering average bit rates, but at the expense of the quality of streams. Error correction under the DAB standard makes the signal more robust but reduces the total bit rate available for streams. DAB broadcasts a single multiplex that is approximately 1.5 MHz wide (≈1,000 kilobits per second). That multiplex is then subdivided into multiple digital streams of between 9 and 12 programs. In contrast, FM HD Radio adds its digital carriers to

363-530: A DMB video subchannel can easily be added to any DAB transmission, as it was designed to be carried on a DAB subchannel. DMB broadcasts in South Korea carry conventional MPEG 1 Layer II DAB audio services alongside their DMB video services. As of 2017 , DMB is currently broadcast in Norway, South Korea, and Thailand. Fifty-five countries provide regular or trial DAB(+) broadcasts. In spectrum management ,

484-900: A PBS member station – through pay television providers in Canada via member stations located near the U.S.–Canada border . These educational public broadcasters include the English-language TVOntario (TVO) and the French-language TFO in Ontario , Télé-Québec in Quebec , and Knowledge Network in British Columbia . TVO and Télé-Québec operate through conventional transmitters and cable, while TFO and Knowledge Network are cable-only channels. Beyond these and other provincial services, Canada does not have

605-470: A cable-only educational and cultural public broadcaster owned by the government of Saskatchewan . SCN was sold to Bluepoint Investment Corporation in 2010, and like CTV Two Alberta did when it became privatized, incorporated a limited schedule of entertainment programming during the late afternoon and nighttime hours, while retaining educational and children's programs during the morning until mid-afternoon to fulfill its licensing conditions; Bluepoint later sold

726-421: A combination of both higher audio quality and more stations. One of the most important decisions regarding the design of a digital radio broadcasting system is the choice of which audio codec to use because the efficiency of the audio codec determines how many radio stations can be carried on a fixed capacity multiplex at a given level of audio quality. Error-correction coding (ECC) is an important technology for

847-555: A community-funded radio network. CJRT-FM in Toronto also operated as a public government-owned radio station for many years; while no longer funded by the provincial government, it still solicits most of its budget from listener and corporate donations and is permitted to air only a very small amount of commercial advertising. City Saskatchewan originated as the Saskatchewan Communications Network,

968-564: A consortium formed in 1986. The MPEG-1 Audio Layer II ("MP2") codec was created as part of the EU147 project. DAB was the first standard based on orthogonal frequency-division multiplexing (OFDM) modulation technique, which since then has become one of the most popular transmission schemes for modern wideband digital communication systems. A choice of audio codec , modulation and error-correction coding schemes and first trial broadcasts were made in 1990. Public demonstrations were made in 1993 in

1089-468: A digital communication system because it determines how robust the reception will be for a given signal strength – stronger ECC will provide a more robust reception than a weaker form. The old version of DAB uses punctured convolutional coding for its ECC. The coding scheme uses unequal error protection (UEP), which means that parts of the audio bit-stream that are more susceptible to errors causing audible disturbances are provided with more protection (i.e.

1210-599: A frequency of 96.9 FM MHz founded by the president of that era, Alfonso Quiñónez Molina . On 4 November 1964 the Government of El Salvador founded Televisión Educativa de El Salvador as an educational television with the channels 8 and 10. And since 1989, Channel 10 became the only public television channel in El Salvador. In Mexico, public stations are operated by municipalities, state governments and universities, there are five national public channels. Canal Once

1331-417: A government department under the administrative hierarchy, it enjoys editorial independence . It operates seven radio channels and produces television programmes and broadcast on commercial television channels, as these channels are required by law to provide timeslots for RTHK television programmes. RTHK would be assigned a digital terrestrial television channel during 2013 to 2015. In India, Prasar Bharati

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1452-531: A large amount of households has led the receiving fee to become something of a political issue. NHK runs two national terrestrial TV stations ( NHK General and NHK Educational ) and three satellite only services ( NHK BS , NHK BS Premium4K , and NHK BS8K services). NHK also runs 3 national radio services and a number of international radio and television services, akin to the BBC World Service . NHK has also been an innovator in television, developing

1573-468: A lower code rate ) and vice versa. However, the UEP scheme used on DAB results in a grey area in between the user experiencing good reception quality and no reception at all, as opposed to the situation with most other wireless digital communication systems that have a sharp "digital cliff", where the signal rapidly becomes unusable if the signal strength drops below a certain threshold. When DAB listeners receive

1694-552: A maximum bit rate that can be carried, but this depends on which error protection level is used. However, all DAB multiplexes can carry a total of 864 "capacity units". The number of capacity units, or CU, that a certain bit-rate level requires depends on the amount of error correction added to the transmission, as described above. In the UK, most services transmit using 'protection level three', which provides an average ECC code rate of approximately ⁠ 1 / 2 ⁠ , equating to

1815-404: A maximum bit rate per multiplex of 1,184 kbit/s. Various different services are embedded into one ensemble (which is also typically called a multiplex ). These services can include: Traditionally, radio programmes were broadcast on different frequencies via AM and FM , and the radio had to be tuned into each frequency as needed. This used up a comparatively large amount of spectrum for

1936-581: A national educational public television network ( TV Cultura , launched in 1969 in São Paulo , which is available in all Brazilian states through its 135 affiliates), two radio stations ( Rádio Cultura FM and Rádio Cultura Brasil, both broadcasting to Greater São Paulo ), two educational TV channels aimed at distance education (TV Educação and Univesp TV, which is available on free-to-air digital TV in São Paulo and nationally by cable and satellite), and

2057-410: A national programming network. TVRI operates three national television channels, plus more than 32 regional stations. There are also independent local public broadcasters which founded by local government in several cities or regencies. They are obligated to network with either RRI or TVRI, depending on the medium, though they are not owned and operated by the two. In Japan, the main public broadcaster

2178-514: A national public educational network. Canada is also home to a number of former public broadcasting entities that have gone private. CTV Two Alberta , which is licensed as an educational television station in Alberta, was once owned by the Alberta government as the public broadcaster Access. In 1993, the provincial government agreed to cease to direct funding of Access after the 1994 fiscal year;

2299-693: A pilot broadcast started in Bavaria in October 1995. In the UK, commercial stations started broadcasting in November 1999. For various reasons such as high receiver costs and limited reception, adoption of DAB had initially been slow, with the exception of the United Kingdom and Denmark. In the UK, DAB radio receivers were high selling and 10% of households owned a DAB radio as of 2005, helped by local manufacturers creating affordable receivers such as

2420-646: A radio network in November 1936. It is the successor to the Canadian Radio Broadcasting Commission (CRBC), which was established by the administration of Prime Minister R.B. Bennett in 1932, modeled on recommendations made in 1929 by the Royal Commission on Radio Broadcasting and stemming from lobbying efforts by the Canadian Radio League . The Canadian Broadcasting Corporation took over operation of

2541-644: A receiver receives a signal that has been transmitted from the different transmitters that are part of an SFN, the signals from the different transmitters will typically have different delays, but to OFDM they will appear to simply be different multipaths of the same signal. Reception difficulties can arise, however, when the relative delay of multipaths exceeds the OFDM guard interval duration, and there are frequent reports of reception difficulties due to this issue when propagation conditions change, such as when there's high pressure, as signals travel farther than usual, and thus

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2662-463: A rectangular byte interleaver rather than Forney interleaving in order to provide a greater interleaver depth, which increases the distance over which error bursts will be spread out in the bit-stream, which in turn will allow the Reed–Solomon error decoder to correct a higher proportion of errors. The ECC used on DAB+ is far stronger than is used on DAB, which, with all else being equal (i.e., if

2783-446: A relatively small number of stations, limiting listening choice. DAB is a digital radio broadcasting system that, through the application of multiplexing and compression, combines multiple audio streams onto a relatively narrow band centred on a single broadcast frequency called a DAB ensemble . Within an overall target bit rate for the DAB ensemble, individual stations can be allocated different bit rates. The number of channels within

2904-721: A result most radio stations on DAB have a lower sound quality than FM, prompting complaints from listeners. As with DAB+ or T-DMB in Europe, FM HD Radio uses a codec based upon the MPEG-4 HE - AAC standard. HD Radio is a proprietary system from iBiquity Digital Corporation , a subsidiary of DTS, Inc. since 2015, which is itself owned by Xperi Corporation since 2016. DAB is an open standard deposited at ETSI. DAB can give substantially higher spectral efficiency , measured in programmes per MHz and per transmitter site, than analogue systems. In many places, this has led to an increase in

3025-498: A secondary affiliate of the English language CBC Television service. CBC operates two national television networks ( CBC Television and Ici Radio-Canada Télé ), four radio networks ( CBC Radio One , CBC Radio 2 , Ici Radio-Canada Première , and Ici Musique ) and several cable television channels including two 24-hour news channels ( CBC News Network and Ici RDI ) in both of Canada's official languages – English and French – and

3146-452: A signal in this intermediate strength area they experience a "burbling" sound which interrupts the playback of the audio. The DAB+ standard incorporates Reed–Solomon ECC as an "inner layer" of coding that is placed around the byte interleaved audio frame but inside the "outer layer" of convolutional coding used by the original DAB system, although on DAB+ the convolutional coding uses equal error protection (EEP) rather than UEP since each bit

3267-742: A strong history of public broadcasting in South America. Inaugurated in 1963, Televisión Nacional Uruguay (TNU) is now linked to the Ministry of Education and Culture of the country. In addition, the Radiodifusión Nacional de Uruguay is a network of radios with 20 different stations in AM and FM that cover the entire country. Since 1998, the Venezuelan state had only one television channel Venezolana de Televisión , and after 2002

3388-690: Is India's public broadcaster. It is an autonomous corporation of the Ministry of Information and Broadcasting (India) , Government of India and comprises the Doordarshan television network ( DD National , DD India , DD News , DD Retro ) and All India Radio . Prasar Bharati was established on 23 November 1997, following a demand that the government owned broadcasters in India should be given autonomy like those in many other countries. The Parliament of India passed an Act to grant this autonomy in 1990, but it

3509-667: Is a digital radio standard for broadcasting digital audio radio services in many countries around the world, defined, supported, marketed and promoted by the WorldDAB organisation. The standard is dominant in Europe and is also used in Australia , and in parts of Africa and Asia ; as of 2022, 55 countries are actively running DAB broadcasts. DAB was the result of a European research project and first publicly rolled out in 1995, with consumer-grade DAB receivers appearing at

3630-543: Is a nice step ahead in the digitisation of our radio landscape," commented Benjamin Dalle , the Flemish media minister. Norway was the first country to announce a complete switch-off of national FM radio stations. The switch-off started on 11 January 2017 and ended on 13 December 2017. The 2017 switch-off did not affect some local and regional radio stations. They can continue to transmit on FM until 2027. The timetable for

3751-467: Is achieved without equalization by means of the OFDM and DQPSK modulation techniques. For details, see the OFDM system comparison table . Using values for Transmission Mode I (TM I), the OFDM modulation consists of 1,536 subcarriers that are transmitted in parallel. The useful part of the OFDM symbol period is 1.0 ms, which results in the OFDM subcarriers each having a bandwidth of 1 kHz due to

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3872-465: Is argued to exist when the benefits to viewers are relatively high in comparison to the benefits to advertisers from contacting viewers. This frequently is the case in undeveloped countries that normally have low benefits to advertising. An alternative funding model proposed by Michael Slaby is to give every citizen credits they can use to pay qualified media sources for civic information and reporting. Additionally, public broadcasting may facilitate

3993-587: Is becoming increasingly common for them to adopt the format and branding of a local news channel. Canada also has a large number of campus radio and community radio stations. Colombia had between 1955 and 1998 a public television system very similar to that adopted by the NPO in the Netherlands, where private television producers called " programadoras " were given hours on the country's two public television channels ( Cadena Uno and Canal A ). In 1998, when

4114-460: Is equally important in DAB+. This combination of Reed–Solomon coding as the inner layer of coding, followed by an outer layer of convolutional coding – so-called "concatenated coding" – became a popular ECC scheme in the 1990s, and NASA adopted it for its deep-space missions. One slight difference between the concatenated coding used by the DAB+ system and that used on most other systems is that it uses

4235-522: Is not forward compatible with DAB+, older DAB receivers cannot receive DAB+ broadcasts. However, DAB receivers that were capable of receiving the new DAB+ standard after a firmware upgrade were being sold as early as July 2007. Generally, if a receiver is DAB+ compatible, there will be a sign on the product packaging. DAB+ broadcasts have launched in several countries like Australia, Czech Republic, Denmark, Germany, Hong Kong (now terminated), Italy, Malta, Norway, Poland, Switzerland, Belgium (October 2017),

4356-793: Is owned and operated by the National Politechnical Institute . It started transmissions on 2 March 1959 as the first public broadcasting television in Mexico. The government of Mexico implemented Telesecundaria in 1968 to provide secondary education to students in rural areas through broadcast television channels, such as XHGC-TV in Mexico City. With the launching of the Morelos II satellite, Telesecundaria began transmitting on one of its analog channels in 1988; in 1994, it began broadcasting in digital format with

4477-890: Is part of the university and cultural diffusion. Canal Catorce was founded in 2012 and is operated by the Sistema Público de Radiodifusión del Estado Mexicano (SPR), an agency from the Federal Government. In the United States , public broadcasters may receive some funding from both federal and state sources, but generally most of their financial support comes from underwriting by foundations and businesses (ranging from small shops to corporations), along with audience contributions via pledge drives . The great majority operate as private not-for-profit corporations . Early public stations were operated by state colleges and universities and were often run as part of

4598-606: Is that public broadcasting is incompatible with commercial objectives. The other is that public broadcasting can and should compete in the marketplace with commercial broadcasters. This dichotomy is highlighted by the public service aspects of traditional commercial broadcasters. Public broadcasters in each jurisdiction may or may not be synonymous with government controlled broadcasters. Public broadcasters may receive their funding from an obligatory television licence fee, individual contributions, government funding or commercial sources. Public broadcasters do not rely on advertising to

4719-692: Is the NHK (Japan Broadcasting Corporation). The broadcaster was set up in 1926 and was modelled on the British Broadcasting Company , the precursor to the British Broadcasting Corporation created in 1927. Much like the BBC, NHK is funded by a "receiving fee" from every Japanese household, with no commercial advertising and the maintenance of a position of strict political impartiality. However, rampant non-payment by

4840-498: Is the data link layer , in charge of statistical time-division multiplexing and frame synchronization . Finally, the physical layer contains the error-correction coding , OFDM modulation , and dealing with the over-the-air transmission and reception of data. Some aspects of these are described below. DAB initially only used the MPEG-1 Audio Layer II audio codec, which is often referred to as MP2 because of

4961-537: Is the public service channel of Ecuador, established in October 2007. The channel was established at the same time as the installation of the Ecuadorian Constituent Assembly so that the sessions could be transmitted live to all the country. Salvadoran broadcasting has a public service radio and television channel. On 1 March 1926 began the operation as the first Central American broadcasting network called "Radio Nacional de El Salvador" with

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5082-569: The Bolivarian Revolution . The Bengali primary state television broadcaster is Bangladesh Television which also broadcasts worldwide through its satellite based branch, BTV World . There are also terrestrial state run TV channels: Sangsad TV owned and operated by Bengali parliament that covers the proceedings of the Parliament. The Bangladesh Betar (BB) is the country's sole state radio broadcaster. Radio transmission in

5203-805: The FM band was authorized to begin normal broadcasting. Houston 's KUHT was the nation's first public television station founded by Dr. John W. Meaney, and signed on the air on May 25, 1953, from the campus of the University of Houston . In rural areas, it was not uncommon for colleges to operate commercial stations instead (e.g., the University of Missouri 's KOMU , an NBC -affiliated television station in Columbia ). The FCC had reserved almost 250 broadcast frequencies for use as educational television stations in 1953, though by 1960, only 44 stations allocated for educational use had begun operations. The passage of

5324-523: The HE-AAC v2 audio codec (also known as eAAC+ ) was adopted. AAC+ uses a modified discrete cosine transform (MDCT) algorithm. The new standard, which is called DAB+, has also adopted the MPEG Surround audio format and stronger error correction coding in the form of Reed–Solomon coding. DAB+ has been standardised as European Telecommunications Standards Institute (ETSI) TS 102 563. As DAB

5445-458: The Internet . Public broadcasting may be nationally or locally operated, depending on the country and the station. In some countries a single organization runs public broadcasting. Other countries have multiple public-broadcasting organizations operating regionally or in different languages. Historically, public broadcasting was once the dominant or only form of broadcasting in many countries (with

5566-636: The Pontifical Catholic University of Valparaíso on channels 8 and 4. Channel 8, in Valparaíso , is the first and oldest station on Chile, transmitting since 5 October 1957. As soon as 1961 universities began transmitting advertisements between their programmes, the first of them being the Channel ;9, showing a Motorola TV set. This kind of disguised advertising took the name of "Payola". This situation, added to

5687-563: The Public Broadcasting Act of 1967 precipitated the development of the current public broadcasting system in the U.S. The legislation established the Corporation for Public Broadcasting (CPB), a private entity that is charged with facilitating programming diversity among public broadcasters, the development and expansion of non-commercial broadcasting, and providing funding to local stations to help them create programs;

5808-480: The Pure Evoke . In countries where DAB did not take off, efforts were made in later years to "re-launch" it using the newer DAB+ standard: it started gaining traction throughout the 2010s and finally took off in countries like France by 2019. DAB adoption in automobiles became increasingly common during this time, and by 2016 it was standard in most cars sold in the UK, Norway and Switzerland. In October 2005,

5929-555: The UK , and has become a requirement for all new cars sold in the EU since 2021. The original version of DAB used the MP2 audio codec ; an upgraded version of the system was later developed and released named DAB+ which uses the HE-AAC v2 (AAC+) audio codec and is more robust and efficient. DAB is not forward compatible with DAB+. Today the majority of DAB broadcasts around the world are using

6050-874: The United Kingdom . The protocol specification was finalized in 1993 and adopted by the ITU-R standardization body in 1994, the European community in 1995 and by ETSI in 1997. Pilot broadcasts were launched in 1995: the Norwegian Broadcasting Corporation (NRK) launched the first DAB channel in the world on 1 June 1995 ( NRK Klassisk ), and the BBC and Swedish Radio (SR) launched their first broadcasts later in September while in Germany

6171-679: The World DMB Forum instructed its Technical Committee to carry out the work needed to adopt the AAC+ audio codec and stronger error correction coding . The AAC+ audio coding standard uses a modified discrete cosine transform (MDCT) audio data compression algorithm. This work led to the launch of the DAB+ system. Trials for DAB-IP were held in London in 2006, as " BT Movio". It competed with DVB-H and MediaFLO which were also under testing. By 2006, 500 million people worldwide were in

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6292-517: The presidential election in 2018 that the public broadcaster is allegedly a "job hanger" (public company existing only for the purpose of securing positions for political allies) and has proposed to privatize or extinguish the public company. On April 9, 2021, the president inserted the public company into the National Privatization Program, with the intention of carrying out studies about the possibility of privatization of

6413-561: The Advancement of New Language Applications Ltd.'), a private not-for-profit consortium of educational institutions in the province of Quebec. Some local community stations also operate non-commercially with funding from corporate and individual donors. In addition, cable companies are required to produce a local community channel in each licensed market. Such channels have traditionally aired community talk shows, city council meetings and other locally oriented programming, although it

6534-601: The BBC started its first regular domestic broadcast of DAB+ in the Channel Islands and followed later with the start of local broadcasts in December 2021 in Cumbria and north Lancashire. Classic FM changed from DAB to DAB+ on 1 January 2024. Digital multimedia broadcasting (DMB) and DAB-IP are both suitable for mobile radio and TV because they support MPEG 4 AVC and WMV9 respectively as video codecs. However,

6655-585: The CPB receives funding earmarked by the federal government as well as through public and private donations. Public television and radio in the U.S. have, from the late 1960s onward, dealt with severe criticism from conservative politicians and think-tanks (such as The Heritage Foundation ), which allege that its programming has a leftist bias and there have been successful attempts to reduce – though not eliminate – funding for public television stations by some state legislatures. The first public radio network in

6776-597: The CRBC's nine radio stations (which were largely concentrated in major cities across Canada, including Toronto , Vancouver , Montreal , and Ottawa ). The CBC eventually expanded to television in September 1952 with the sign-on of CBFT in Montreal; CBFT was the first television station in Canada to initiate full-time broadcasts, which initially served as a primary affiliate of the French language Télévision de Radio-Canada and

6897-470: The Colombian government allowed the opening of television to the private market by granting two broadcast licenses to the programadoras Caracol Televisión and RCN Televisión , these television producers went into crisis, causing many to end their activities or produce content for the private television channels. Currently, Colombia has three public channels (one is operated by a private company formed by

7018-445: The French-language channels Ici Explora and Ici ARTV , dedicated to science and culture respectively. CBC's national television operations and some radio operations are funded partly by advertisements, in addition to the subsidy provided by the federal government. The cable channels are commercial entities owned and operated by the CBC and do not receive any direct public funds, however, they do benefit from synergies with resources from

7139-446: The Public Radio Satellite System. Cultural Native American and Mexican American music and programming are also featured regionally. NPR is colloquially though inaccurately conflated with public radio as a whole, when in fact "public radio" includes many organizations. In the United States, the Public Broadcasting Service (PBS) serves as the nation's main public television provider. When it launched in October 1970, PBS assumed many of

7260-413: The Secretariat of Communication of the state government. Brazil also has many campus radio and community radio stations and several educational local TV channels (many of them belonging to public and private universities). In Canada, the main public broadcaster is the national Canadian Broadcasting Corporation (CBC; French : Société Radio-Canada ), a crown corporation – which originated as

7381-435: The United Kingdom and the Netherlands. Malta was the first country to launch DAB+ in Europe in October 2008. South Africa began a DAB+ technical pilot in November 2014 on channel 13F in Band 3. If DAB+ stations launch in established DAB countries, they can transmit alongside existing DAB stations that use the older MPEG-1 Audio Layer II audio format, and most existing DAB stations are expected to continue broadcasting until

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7502-404: The United States has reached an agreement with Canada to restrict L-Band DAB to terrestrial broadcast to avoid interference. In January 2017, an updated DAB specification (2.1.1) removed Modes II, III and IV, leaving only Mode I. From an OSI model protocol stack viewpoint, the technologies used on DAB inhabit the following layers: the audio codec inhabits the presentation layer . Below that

7623-399: The United States was founded in 1949 in Berkeley, California, as station KPFA , which became and remains the flagship station for a national network called Pacifica Radio . From the beginning, the network has refused corporate funding of any kind, and has relied mainly on listener support. KPFA gave away free FM radios to build a listener base and to encourage listeners to "subscribe" (support

7744-492: The advent of the Solidaridad I satellite, and Edusat was established and began transmitting in Mexico, Central America and certain regions of the United States. In 1982, Canal 22 was founded and began operations eleven years later by the Ministry of Culture as part of the "RED México". In 2005 the National Autonomous University of Mexico (UNAM in Spanish) began transmissions as the sister channel of XEUN-AM and XEUN-FM (both radio stations founded in 1959), TV UNAM which

7865-413: The bands that are allocated for public DAB services, are abbreviated with T-DAB . In the European Union , "the European Electronic Communications Code (EECC) entered into force on 20 December 2018, with transposition into national legislation by Member States required by 21 December 2020. The Directive applies to all EU member states regardless of the status of DAB+ in each country. This means that since

7986-450: The broadcaster. While many members have significant editorial independence, the Alliance includes organizations that have significant state control, especially with regard to island nations. In Brazil, the two main national public broadcasters are Empresa Brasil de Comunicação (EBC) and the Fundação Padre Anchieta (FPA). EBC was created in 2007 to manage the Brazilian federal government's radio and television stations. EBC owns broadcast

8107-490: The channel to Rogers Media in 2012, expanding a relationship it began with SCN in January of that year, when Rogers began supplying entertainment programming to the channel through an affiliation agreement with its English-language broadcast network, Citytv . One television station, CFTU in Montreal , operates as an educational station owned by CANAL ( French : Corporation pour l'Avancement de Nouvelles Applications des Langages Ltée , lit.   'Corporation for

8228-515: The channel was sold to CHUM Limited in 1995, which initially acquired the channel through a majority-owned subsidiary, Learning and Skills Television of Alberta Limited (LSTA). To fulfill its license conditions as an educational station, it broadcasts educational and children's programming during the daytime hours, while airing entertainment programming favoured by advertisers and viewers in prime time. The service discontinued its broadcast transmitters in Calgary and Edmonton in August 2011, due to

8349-455: The children's TV channel TV Rá-Tim-Bum , available nationally on pay TV. Many Brazilian states also have regional and statewide public radio and television stations. One example is Minas Gerais , which has the EMC ( Empresa Mineira de Comunicação ), a public corporation created in 2016 modelled on EBC, formed by Rede Minas , a statewide television network and the two stations of Rádio Inconfidência , which operates in AM, FM and shortwave ; in

8470-459: The closure of FM signals in 2017 were as follows: SRG SSR , Switzerland's public-service broadcaster, will shut down its FM transmission infrastructure on 31 December 2024. The corporation concluded that maintaining FM broadcasts along with DAB+ and Internet streaming was no longer cost-effective, as due to widespread adoption of DAB+ the share of the public relying exclusively on FM was under ten percent and decreasing. All other FM broadcasters in

8591-490: The corporation decommissioning its network of rebroadcasters following Canada's transition to digital television in August 2011 have significantly reduced the terrestrial coverage of both CBC Television and Ici Radio-Canada Télé; the Canadian Radio-television and Telecommunications Commission (CRTC) does require cable, satellite and IPTV providers to carry CBC and Radio-Canada stations as part of their basic tier, regardless of terrestrial availability in an individual market. Of

8712-470: The corporations were not merged, although SDR and SWF operated several joint services. The two corporations had intended to merge in 1990, but the merger was pushed back by the reunification process . Several channel mergers and changes took effect from 1 September 1998: A radio news channel, SWR cont.ra, was added in July 2002. This was relaunched with a new programme format on 9 January 2012 as SWRinfo. It

8833-589: The country must shut down or convert to DAB+ by 31 December 2026. As of 2021 : DAB uses a wide-bandwidth broadcast technology and typically spectra have been allocated for it in Band III (174–240 MHz) and L band (1.452–1.492 GHz), although the scheme allows for operation between 30 and 300 MHz . The US military has reserved L-Band in the USA only, blocking its use for other purposes in America, and

8954-487: The coverage area of DAB broadcasts, although by this time sales of receivers had only taken off in the United Kingdom (UK) and Denmark . In 2006 there were approximately 1,000 DAB stations in operation worldwide. As of 2018, over 68 million devices have been sold worldwide, and over 2,270 DAB services are on air. In October 2018, the WorldDAB organisation introduced an all-new logo for DAB (specifically DAB+) to replace

9075-402: The decreasing signal, providing more effective coverage over a larger area. DAB+ is a " green " platform and can bring up to 85 percent energy consumption savings compared to FM broadcasting (but analog tuners are more efficient than digital ones, and DRM+ has been recommended for small scale transmissions). Similar terrestrial digital radio standards are HD Radio , ISDB-Tb , DRM , and

9196-723: The director's office being in Stuttgart. It is a part of the ARD consortium. It broadcasts on two television channels and six radio channels, with its main television and radio office in Baden-Baden and regional offices in Stuttgart and Mainz . It is the second largest broadcasting organization in Germany behind WDR . SWR, with a coverage of 55,600 km (21,500 sq. mi.), and an audience reach estimated to be 14.7 million. SWR employs 3,700 people in its various offices and facilities. SWR

9317-536: The end of 2020, across all EU countries, all radios in new cars must be capable of receiving and reproducing digital terrestrial radio." Following the European Union's obligation in 2020 to include DAB+ receivers in new cars, Belgium has stopped all sales of analogue radio receivers from 1 January 2023. Thus, consumers are no longer able to purchase AM or FM receivers for domestic use. "The obligation to incorporate DAB+ for new cars and domestic radio receivers

9438-467: The expense of transitioning the two stations to digital , and the fact that the service had mandatory carriage on television providers serving Alberta regardless of whether it ran over-the-air transmitters. The service has since operated as part of Bell Media 's CTV Two chain of stations. Public radio station CKUA in Alberta was also formerly operated by Access, before being sold to the non-profit CKUA Radio Foundation which continues to operate it as

9559-533: The fact that TV was only reaching Santiago and Valparaíso , led to the creation of a state network that should serve the entire country. This network, created in 1964 and in operation since 24 October 1969, is known as " Televisión Nacional de Chile ". After the military government of Augusto Pinochet , television was mostly deregulated. Thus, two new commercial channels were born: Megavisión (Channel 9, on 23 October 1990) and La Red (Channel 4, on 12 May 1991). The University of Chile's Channel 11 also

9680-665: The following cities: SWR regional offices are in: In Baden-Württemberg there are also "Korrespondentenbüros" (roughly: "correspondence offices") for the SWR in Aalen , Albstadt-Ebingen , Biberach , Buchen , Konstanz , Mosbach , Pforzheim , Ravensburg , Schwäbisch Hall , Tauberbischofsheim and Waldshut-Tiengen . SWR provides programs to various TV and radio networks, some done in collaboration with other broadcasters, and others completely independently. SWR operates six radio channels on FM and DAB , all of which are also streamed on

9801-497: The following principles: While the application of certain principles may be straightforward, as in the case of accessibility, some of the principles may be poorly defined or difficult to implement. In the context of a shifting national identity, the role of public broadcasting may be unclear. Likewise, the subjective nature of good programming may raise the question of individual or public taste. Within public broadcasting there are two different views regarding commercial activity. One

9922-667: The functions of its predecessor, National Educational Television (NET). NET was shut down by the Ford Foundation and the Corporation for Public Broadcasting after the network refused to stop airing documentaries on varying social issues that had alienated many of the network's affiliates. PBS would later acquire Educational Television Stations , an organization founded by the National Association of Educational Broadcasters (NAEB), in 1973. Uruguay has

10043-495: The government decided to launch the channel ViVe (2003), teleSUR (2005), TVES (2007) (a signal that until that year was occupied by RCTV ) and Asamblea Nacional Televisión in addition to supporting and financing a network of community channels as well as Ávila Television belonging to the Metropolitan Mayor's Office of Caracas. United States politicians have commented that TeleSUR is a propaganda tool in favor of

10164-581: The implementation of a cultural policy (an industrial policy and investment policy for culture). Examples include: As an industry organization for public media, the Public Media Alliance supports its members and the industry of public media more broadly. For example, the Alliance advocated against a proposal on the Isle of Man that they felt would jeopardize the editorial independence of

10285-424: The internet. Since 2007, the managing director of SWR has been Peter Boudgoust, who was previously the administrative director of SWR. The managing director's office is located in Stuttgart. Seven other directors serve under him (locations of their offices in parentheses): SWR operates the following musical organizations: Within the ARD , SWR is responsible for the coordination of the joint network programming on

10406-447: The inverse relationship between these two parameters, and the overall OFDM channel bandwidth is 1.537 MHz. The OFDM guard interval for TM I is 0.246 ms, which means that the overall OFDM symbol duration is 1.246 ms. The guard interval duration also determines the maximum separation between transmitters that are part of the same single-frequency network (SFN), which is approximately 74 km for TM I. OFDM allows

10527-825: The network has moved its programming to stations opened by the corporation or has purchased certain affiliates from private broadcasting groups; budgetary issues led the CBC to choose not to launch new rebroadcast transmitters in markets where the network disaffiliated from a private station after 2006; the network dropped its remaining private affiliates in 2016, when CJDC-TV — Dawson Creek and CFTK-TV — Terrace, British Columbia defected from CBC Television that February and Lloydminster -based CKSA-DT disaffiliated in August of that year (to become affiliates of CTV Two and Global , respectively). The CBC's decision to disaffiliate from these and other privately owned stations, as well as

10648-658: The networks 3sat and arte as well as the main Internet site for the ARD, ARD.de. The offices for ARTE Deutschland TV GmbH are in Baden-Baden, and the offices for ARD.de are in Mainz. SWR is also responsible for some of the foreign studios operated on behalf of the ARD: The following companies are subsidiaries of SWR-Holding GmbH: Public broadcasting Common media include AM , FM , and shortwave radio ; television; and

10769-510: The notable exceptions of the United States, Mexico, and Brazil). Commercial broadcasting now also exists in most of these countries; the number of countries with only public broadcasting declined substantially during the latter part of the 20th century . The primary mission of public broadcasting is that of public service, speaking to and engaging as a citizen. The British model is often referenced in definitions. The model embodies

10890-461: The online radio service CBC Radio 3 , music streaming service CBC Music , and the launch of online news services, such as CBC Hamilton , in some markets which are not directly served by their own CBC television or radio stations. In addition, several provinces operate public broadcasters; these are not CBC subentities, but distinct networks in their own right. Most of the provincial services maintain an educational programming format, differing from

11011-412: The other CBC operations. The CBC has frequently dealt with budget cuts and labour disputes, often resulting in a debate about whether the service has the resources necessary to properly fulfill its mandate. As of 2017 , all of CBC Television's terrestrial stations are owned and operated by the CBC directly. The number of privately owned CBC Television affiliates has gradually declined in recent years, as

11132-475: The population of the Amazon region, and Agência Brasil , a news agency. Starting in 2021, EBC expanded the coverage of its radio stations through the new FM extended band to the metropolitan areas of São Paulo, Belo Horizonte and Recife, important Brazilian regions which did not have EBC radio stations. FPA is a non-profit foundation created by the government of the state of São Paulo in 1967 and includes

11253-456: The previous logo that had been in use since before DAB's initial launch in 1995. The term "DAB" most commonly refers both to a specific DAB standard using the MP2 audio codec, but can sometimes refer to a whole family of DAB-related standards, such as DAB+, DMB, and DAB-IP. WorldDAB , the organisation in charge of the DAB standards, announced DAB+, a major upgrade to the DAB standard in 2006, when

11374-410: The primarily entertainment-based CBC/Radio-Canada operations, but more closely formatted to (and carrying many of the same programs as) the U.S.-based Public Broadcasting Service (PBS), which itself is available terrestrially and – under a CRTC rule that requires Canadian cable, satellite and IPTV providers to carry affiliates of the four major U.S. commercial networks ( ABC , NBC , CBS and Fox ) and

11495-532: The public broadcaster. Some states often had problems with their public broadcasting services. In São Paulo, FPA had sometimes dealt with budget cuts, labor disputes and strikes. In Rio Grande do Sul, TVE-RS and FM Cultura were managed by the Piratini Foundation, a non-profit state foundation. However, due to the public debt crisis in the state, in 2018, the Piratini Foundation had its activities closed, and TVE-RS and FM Cultura started to be managed by

11616-609: The region now forming Bangladesh started in Dhaka on December 16, 1939. The Ministry of Information and Broadcasting (Bangladesh) is responsible for the administration of all government TV channels and Radio. Radio Television Brunei (RTB) is the only public broadcaster in Brunei Darussalam. In Hong Kong, the Radio Television Hong Kong ( RTHK ) is the sole public service broadcaster. Although being

11737-697: The related DMB . The DAB standard was initiated as a European research project called Eureka-147 in the 1980s. DAB has been under development since 1981 at the Institut für Rundfunktechnik (IRT). The first DAB demonstrations were held in 1985 at the WARC-ORB in Geneva, and in 1988 the first DAB transmissions were made in Germany. Later, DAB was developed as a research project for the European Union ( EUREKA ), which started in 1987 on an initiative by

11858-550: The same degree as commercial broadcasters, or at all; this allows public broadcasters to transmit programmes that are not commercially viable to the mass market , such as public affairs shows, radio and television documentaries , and educational programmes . One of the principles of public broadcasting is to provide coverage of interests for which there are missing or small markets. Public broadcasting attempts to supply topics of social benefit that are otherwise not provided by commercial broadcasters. Typically, such underprovision

11979-470: The schools' cooperative extension services . Stations in this era were internally funded, and did not rely on listener contributions to operate, some accepted advertising. Networks such as Iowa Public Radio , South Dakota Public Radio , and Wisconsin Public Radio began under this structure. The concept of a " non-commercial, educational " station per se did not show up in U.S. law until 1941, when

12100-498: The shares of four former programadoras ) and eight public radio stations (three stations are regional broadcasters). Chilean television was founded through universities, in an attempt to bring public television without the state having to pay directly and control content. The University of Chile (owner of the former channels 9 and 11 until 1993), the Catholic University of Chile on channels 2 and 13 until 2010, and

12221-430: The signals are likely to arrive with a relative delay that is greater than the OFDM guard interval. Low power gap-filler transmitters can be added to an SFN as and when desired in order to improve reception quality, although the way SFNs have been implemented in the UK up to now they have tended to consist of higher power transmitters being installed at main transmitter sites in order to keep costs down. An ensemble has

12342-416: The sound quality can be noticeably inferior to analog FM. High-fidelity equates to a high bit rate and higher transmission cost. DAB is more robust with regard to noise and multipath fading for mobile listening, although DAB reception quality degrades rapidly when the signal strength falls below a critical threshold (as is normal for digital broadcasts ), whereas FM reception quality degrades slowly with

12463-439: The start of this millennium. Initially it was expected in many countries that existing FM services would switch over to DAB, although the take up of DAB has been much slower than expected. As of 2023 , Norway is the first country to have implemented a national FM radio switch-off, with others to follow in the next years. In recent years, DAB has become the most popular radio listening platform in Norway, Switzerland and

12584-730: The state of Pará , the state-funded foundation FUNTELPA ( Fundação Paraense de Radiodifusão ) operates the public educational state-wide television network Rede Cultura do Pará (which covers the entire state of Pará, reaching many cities of Brazilian Amazon ) and Rádio Cultura, a public radio station which broadcasts in FM for Belém . The state of Espírito Santo has the RTV-ES ( Rádio e Televisão Espírito Santo ), with its television channel TVE-ES ( TV Educativa do Espírito Santo ) and an AM radio station ( Rádio Espírito Santo ), and in Rio Grande do Sul ,

12705-655: The state-wide public television channel TVE-RS ( TV Educativa do Rio Grande do Sul ) and the public radio station FM Cultura (which broadcasts for Porto Alegre metropolitan area) are the two public broadcasters in the state. Regional public television channels in Brazil often broadcast part of TV Brasil or TV Cultura programming among with some hours of local programming. Since the government of Michel Temer , EBC has received several criticism from some politicians for having an alleged political bias. The president of Brazil from 2019 to 2022, Jair Bolsonaro , said in his campaign for

12826-493: The station directly with donations). It is the world's oldest listener-supported radio network. Since the creation of the Corporation for Public Broadcasting, Pacifica has sometimes received CPB support. Pacifica runs other stations in Los Angeles , New York City , Washington, D.C. , and Houston , as well as repeater stations and a large network of affiliates. A national public radio network, National Public Radio (NPR),

12947-588: The television channel TV Brasil (launched in 2007, being the merger of TVE Brasil, launched in Rio de Janeiro in 1975, and TV Nacional, launched in Brasilia in 1960), the radio stations Rádio Nacional and Rádio MEC , broadcast to Brasilia , Rio de Janeiro , São Paulo , Belo Horizonte , Recife , and Tabatinga , Rádio Nacional da Amazônia , a shortwave radio station based in Brasília with programming aimed to

13068-428: The three major French-language television networks in Canada, Ici Radio-Canada Télé is the only one that maintains terrestrial owned-and-operated stations and affiliates in all ten Canadian provinces , although it maintains only one station ( Moncton, New Brunswick -based CBAFT-DT ) that serves the four provinces comprising Atlantic Canada . In recent years, the CBC has also expanded into new media ventures including

13189-406: The traditional 270 kilohertz-wide analog channels, with capability of up to 300 kbit/s per station (pure digital mode). The full bandwidth of the hybrid mode approaches 400 kHz. The first generation DAB uses the MPEG-1 Audio Layer II (MP2) audio codec, which has less efficient compression than newer codecs. The typical bitrate for DAB stereo programs is only 128 kbit/s or less and as

13310-451: The transmission powers remained the same), would translate into people who currently experience reception difficulties on DAB receiving a much more robust signal with DAB+ transmissions. It also has a far steeper "digital cliff", and listening tests have shown that people prefer this when the signal strength is low compared to the shallower digital cliff on DAB. Immunity to fading and inter-symbol interference (caused by multipath propagation)

13431-509: The ubiquitous MP3 (MPEG-1 Audio Layer III). The newer DAB+ standard adopted the LC-AAC and HE-AAC , including its version 2 audio codecs, commonly known as AAC , AAC+ or aacPlus . AAC+ uses a modified discrete cosine transform (MDCT) algorithm, and is approximately three times more efficient than MP2, which means that broadcasters using DAB+ are able to provide far higher audio quality or far more stations than they could with DAB, or

13552-501: The upgraded DAB+ standard, with only the UK, Romania, Brunei, and the Philippines still using a significant number of legacy DAB broadcasts. DAB is generally more efficient in its use of spectrum than analogue FM radio, and thus can offer more radio services for the same given bandwidth. The broadcaster can select any desired sound quality, from high-fidelity signals for music to low-fidelity signals for talk radio, in which case

13673-408: The use of single-frequency networks ( SFN ), which means that a network of transmitters can provide coverage to a large area – up to the size of a country – where all transmitters use the same transmission frequency block. Transmitters that are part of an SFN need to be very accurately synchronised with other transmitters in the network, which requires the transmitters to use very accurate clocks. When

13794-478: The vast majority of receivers support DAB+. In the UK, DAB+ launched in January 2016 following a trial period starting September 2014. Ofcom published a consultation for a new national multiplex containing a mix of DAB and DAB+ services, with the intention of moving all services to DAB+ in the long term. In February 2016, the new national network Sound Digital launched with three DAB+ stations. In August 2021

13915-785: The world's first high-definition television technology in 1964 and launching high definition services in Japan in 1981. The public broadcaster in Malaysia is the state-owned Radio Televisyen Malaysia (RTM) and TV Alhijrah . RTM was previously funded publicly through money obtained from television licensing , however it is currently state-subsidised, as television licences have been abolished. As of 2021 RTM operates 6 national, 16 state and 11 district radio stations as well as 6 national terrestrial television channels: TV1 , TV2 , TV Okey , Sukan RTM , Berita RTM , and TV6. Digital Audio Broadcasting Digital Audio Broadcasting ( DAB )

14036-666: Was a legacy of the Allied occupation of Germany after the Second World War . The French Military Government established SWF as the sole public broadcaster in their occupation zone. This area was later divided into the states of South Baden , Württemberg-Hohenzollern and Rhineland-Palatinate . The American Military Government established SDR in Württemberg-Baden . When Baden , Württemberg-Hohenzollern and Württemberg-Baden merged to form Baden-Württemberg in 1952,

14157-659: Was created in February 1970, following the passage of the Public Broadcasting Act of 1967. This network replaced the Ford Foundation–backed National Educational Radio Network . Some independent local public radio stations buy their programming from distributors such as NPR; Public Radio International (PRI); American Public Media (APM); Public Radio Exchange (PRX); and Pacifica Radio , most often distributed through

14278-540: Was established on 1 January 1998 through the merger of Süddeutscher Rundfunk (SDR, Southern German Broadcasting), formerly headquartered in Stuttgart, and Südwestfunk (SWF, South West Radio), formerly headquartered in Baden-Baden. The new corporation began broadcasting on 1 September 1998. Its predecessor organizations, SDR and SWF, were formally dissolved at 24:00 on 30 September 1998, SWR legally succeeding them with effect from 0:00 on 1 October 1998. The existence of two public broadcasting corporations in southwest Germany

14399-400: Was not enacted until 15 September 1997. Though a public broadcaster, it airs commercial advertisements. In Indonesia, there are three types of public broadcaster. The first two are national-scale broadcasters: Radio Republik Indonesia (RRI) and Televisi Republik Indonesia (TVRI). RRI currently operates four radio networks carried by some or all of more than 90 local stations, one of them is

14520-585: Was relaunched again as SWR Aktuell on 6 February 2017. Licensing fees required for radio and TV sets are €17.50 per month, as of 1 April 2015. These fees are not collected directly by the SWR but by the ARD ZDF Deutschlandradio Beitragsservice that is a common organisation of ARD , its members, ZDF and Deutschlandradio . In 2016, the SWR received over € 1,000,000,000 from these fees, out of nearly € 8,000,000,000 collected in total that year. SWR operates studios in

14641-526: Was rented to a private operator on 1 October 1993 and is now known today as " Chilevisión ". Televisión Nacional, popularly known as Channel 7 due to its Santiago frequency, is governed by a seven-member board appointed by both the President and the Senate . It is meant to be independent of political pressures, although accusations of bias have been made, especially during election campaigns. Ecuador TV

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