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115-626: The compact disc ( CD ) is a digital optical disc data storage format that was co-developed by Philips and Sony to store and play digital audio recordings. It uses the Compact Disc Digital Audio format which typically provides 74 minutes of audio on a disc. In later years, the compact disc was adapted for non-audio computer data storage purposes as CD-ROM and its derivatives. First released in Japan in October 1982,

230-399: A CD-DA layer. The optophone , first presented in 1931, was an early device that used light for both recording and playback of sound signals on a transparent photograph . More than thirty years later, American inventor James T. Russell has been credited with inventing the first system to record digital media on a photosensitive plate. Russell's patent application was filed in 1966, and he

345-494: A Red Book CD; thus, the mono source material is usually presented as two identical channels in a standard Red Book stereo track (i.e., mirrored mono ); an MP3 CD , can have audio file formats with mono sound. CD-Text is an extension of the Red Book specification for an audio CD that allows for the storage of additional text information (e.g., album name, song name, artist) on a standards-compliant audio CD. The information

460-473: A 150-minute playing time, 44,056 Hz sampling rate, 16-bit linear resolution, and cross-interleaved Reed-Solomon coding (CIRC) error correction code —specifications similar to those later settled upon for the standard compact disc format in 1980. Technical details of Sony's digital audio disc were presented during the 62nd AES Convention, held on 13–16 March 1979, in Brussels . Sony's AES technical paper

575-603: A CD. VCDs are playable in dedicated VCD players, most modern DVD-Video players, personal computers, and some video game consoles. The VCD standard was created in 1993 by Sony, Philips, Matsushita , and JVC and is referred to as the White Book standard. Overall picture quality is intended to be comparable to VHS video. Poorly compressed VCD video can sometimes be of lower quality than VHS video, but VCD exhibits block artifacts rather than analog noise and does not deteriorate further with each use. 352×240 (or SIF ) resolution

690-474: A broader form of political censorship . Over the years YouTube has grown to become a website with user generated media. This content is oftentimes not mediated by any company or agency, leading to a wide array of personalities and opinions online. Over the years, YouTube and other platforms have also shown their monetary gains. In 2020, the top 10 highest earning YouTube content creators each generated over 15 million dollars. Many of these YouTube profiles over

805-519: A copyright violation on TikTok. One example is, accidentally having music playing on a stereo in the background or recording a laptop screen playing a song. Online magazines or digital magazines are one of the largest targets for copyright issues. According to the Audit Bureau of Circulations report from March 2011, the definition of this medium is when a digital magazine involves the distribution of magazine content by electronic means; it may be

920-493: A decrease in newspaper industry employment, with only about 40,000 people working in the workforce currently. Alliance of Audited Media & Publishers information during the 2008 recession, over 10% of print sales are diminished for certain magazines, with a hardship coming from only 75% of the sales advertisements as before. However, in 2018, major newspapers advertising revenue was 35% from digital ads. In contrast, mobile versions of newspapers and magazines came in second with

1035-688: A decrease of cable TV services to about 59%, while streaming services are growing at around 29%, and 9% are still users of the digital antenna. TV Controllers now incorporate designated buttons for streaming platforms. Users are spending an average of 1:55 with digital video each day, and only 1:44 on social networks. 6 out of 10 people report viewing their television shows and news via a streaming service. Platforms such as Netflix have gained attraction due to their adorability, accessibility, and for its original content. Companies such as Netflix have even bought previously cancelled shows such as Designated Survivor , Lucifer , and Arrested Development . As

1150-478: A diameter of 20 cm (7.9 in) and a sound quality superior to that of the vinyl record. However, due to the unsatisfactory performance of the analog format, two Philips research engineers recommended a digital format in March 1974. In 1977, Philips then established a laboratory with the mission of creating a digital audio disc. The diameter of Philips's prototype compact disc was set at 11.5 cm (4.5 in),

1265-415: A disc played from beginning to end slows its rotation rate during playback. The program area is 86.05 cm and the length of the recordable spiral is 86.05 cm / 1.6 μm = 5.38 km. With a scanning speed of 1.2 m/s, the playing time is 74 minutes or 650 MiB of data on a CD-ROM. A disc with data packed slightly more densely is tolerated by most players (though some old ones fail). Using

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1380-445: A former member of the task force, gives background information on the many technical decisions made, including the choice of the sampling frequency, playing time, and disc diameter. The task force consisted of around 6 persons, though according to Philips, the compact disc was "invented collectively by a large group of people working as a team". Early milestones in the launch and adoption of the format included: The first artist to sell

1495-454: A fully digital, paperless society is accompanied by the fear that we may soon—or currently—be facing a digital dark age , in which older media are no longer accessible on modern devices or using modern methods of scholarship. Digital media has a significant, wide-ranging and complex effect on society and culture. A senior engineer at Motorola named Martin Cooper was the first person to make

1610-469: A graphics signal (typically, the CD+G player is hooked up to a television set or a computer monitor); these graphics are almost exclusively used to display lyrics on a television set for karaoke performers to sing along with. The CD+G format takes advantage of the channels R through W. These six bits store the graphics information. CD + Extended Graphics (CD+EG, also known as CD+XG) is an improved variant of

1725-475: A huge growth of 135%. The New York Times has noted a 47% year of year rise in their digital subscriptions. 43% of adults get news often from news websites or social media, compared with 49% for television. Pew Research also asked respondents if they got news from a streaming device on their TV – 9% of U.S. adults said that they do so often. Digital media has also allowed individuals to be much more active in content creation . Anyone with access to computers and

1840-659: A joint task force of engineers to design a new digital audio disc. After a year of experimentation and discussion, the Red Book CD-DA standard was published in 1980. After their commercial release in 1982, compact discs and their players were extremely popular. Despite costing up to $ 1,000, over 400,000 CD players were sold in the United States between 1983 and 1984. By 1988, CD sales in the United States surpassed those of vinyl LPs, and, by 1992, CD sales surpassed those of prerecorded music-cassette tapes. The success of

1955-562: A joint task force of engineers to design a new digital audio disc. Led by engineers Kees Schouhamer Immink and Toshitada Doi , the research pushed forward laser and optical disc technology. After a year of experimentation and discussion, the task force produced the Red Book CD-DA standard. First published in 1980, the standard was formally adopted by the IEC as an international standard in 1987, with various amendments becoming part of

2070-452: A linear velocity of 1.2 m/s and a narrower track pitch of 1.5 μm increases the playing time to 80 minutes, and data capacity to 700 MiB. Even denser tracks are possible, with semi-standard 90 minute/800 MiB discs having 1.33 μm, and 99 minute/870 MiB having 1.26 μm, but compatibility suffers as density increases. A CD is read by focusing a 780 nm wavelength ( near infrared ) semiconductor laser through

2185-474: A malfunctioning CD writer . Error scanning can reliably predict data losses caused by media deterioration. Support of error scanning differs between vendors and models of optical disc drives , and extended error scanning (known as "advanced error scanning" in Nero DiscSpeed ) has only been available on Plextor and some BenQ optical drives so far, as of 2020. The digital data on a CD begins at

2300-763: A million copies on CD was Dire Straits , with their 1985 album Brothers in Arms . One of the first CD markets was devoted to reissuing popular music whose commercial potential was already proven. The first major artist to have their entire catalog converted to CD was David Bowie , whose first fourteen studio albums (up to Scary Monsters (and Super Creeps) ) of (then) sixteen were made available by RCA Records in February 1985, along with four greatest hits albums; his fifteenth and sixteenth albums ( Let's Dance and Tonight , respectively) had already been issued on CD by EMI Records in 1983 and 1984, respectively. On 26 February 1987,

2415-465: A new period in human history known as the Information Age or the digital revolution . The transition has created some uncertainty about definitions. Digital media, new media , multimedia , and similar terms all have a relationship to both the engineering innovations and cultural impact of digital media. The blending of digital media with other media, and with cultural and social factors,

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2530-533: A phone call on April 3, 1973. He decided the first phone call should be to a rival telecommunications company saying "I'm speaking via a mobile phone". Ten years later, Motorola released the Motorola DynaTAC , the first commercially available mobile phone. In the early 1990s Nokia released the Nokia 1011 , the first mass-produced mobile phone. The number of smartphone users has increased dramatically, as has

2645-423: A replica. This definition can be considered outdated now that PDF replicas of print magazines are no longer common practice. These days digital magazines refer to magazines specifically created to be interactive digital platforms such as the internet, mobile phones, private networks, iPad, or other devices. The barriers to digital magazine distribution are thus decreasing. However, these platforms are also broadening

2760-424: A significant, wide-ranging and complex impact on society and culture. Digital media platforms like YouTube work through a triple-product business model in which platforms provide information and entertainment ( infotainment ) to the public often at no cost, while simultaneously capturing their attention, and also collecting user data to sell to advertisers. This business model aims to maximize consumer engagement on

2875-622: A significantly broad and complex impact on society and culture. Combined with the Internet and personal computing , digital media has caused disruptive innovation in publishing, journalism, public relations, entertainment, education, commerce and politics. Digital media has also posed new challenges to copyright and intellectual property laws, fostering an open content movement in which content creators voluntarily give up some or all of their legal rights to their work. The ubiquity of digital media and its effects on society suggest that we are at

2990-469: A system of devices that could be used to help scientists, doctors, and historians, among others, to store, analyze and communicate information. Calling this then-imaginary device a " memex ", Bush wrote: The owner of the memex, let us say, is interested in the origin and properties of the bow and arrow. Specifically, he is studying why the short Turkish bow was apparently superior to the English long bow in

3105-506: A system of ones and zeroes that are combined to make hundreds of characters. The 1s and 0s of binary are the "digits" of digital media. While digital media did not come into common use until the late 20th century, the conceptual foundation of digital media is traced to the work of scientist and engineer Vannevar Bush and his celebrated essay " As We May Think ", published in The Atlantic Monthly in 1945. Bush envisioned

3220-458: A variation of this technique called pulse-density modulation (PDM), while Matsushita (now Panasonic ) chose pulse-width modulation (PWM), advertising it as MASH, which is an acronym derived from their patented Multi-stAge noiSe-sHaping PWM topology. The CD was primarily planned as the successor to the vinyl record for playing music, rather than as a data storage medium. However, CDs have grown to encompass other applications. In 1983, following

3335-451: A worm gear is used, a second shorter-throw linear motor, in the form of a coil and magnet, makes fine position adjustments to track eccentricities in the disk at high speed. Some CD drives (particularly those manufactured by Philips during the 1980s and early 1990s) use a swing arm similar to that seen on a gramophone. The pits and lands do not directly represent the 0s and 1s of binary data . Instead, non-return-to-zero, inverted encoding

3450-402: Is Tucker Carlson leaving Fox News due to his controversial opinions and moving over to X. This has sparked debate surrounding topics such as free speech and hate speech. Digital media encompasses numerical networks of interactive systems that link databases, allowing users to navigate from one bit of content or webpage to another. Because of this ease, digital media poses several challenges to

3565-467: Is because a series of computer technologies protect the digital content being created and transmitted. The Digital Millennium Copyright Act (DMCA) provides safety to intermediaries that host user content, such as YouTube, from being held liable for copyright infringement so long as they meet all required conditions. The most notable of which is the " notice and take down " policy. The policy requires online intermediaries to remove and/or disable access to

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3680-460: Is being used. If the content is non-fiction, it is more likely to fall under fair use than if the content is fiction. The third factor is how much of the copyrighted content is in use. Small amounts of copyrighted content are more likely to be considered fair. The last factor is, whether the use of copyrighted content earns money or affect the value of the content. Misplaced Pages uses some of the most common open licenses, Creative Commons licenses, and

3795-578: Is commonly referred to as the digital revolution can be attributed to the use of interconnectivity. Examples of digital media include software , digital images , digital video , video games , web pages and websites , social media , digital data and databases , digital audio such as MP3 , electronic documents and electronic books . Digital media often contrasts with print media , such as printed books, newspapers and magazines, and other traditional or analog media, such as photographic film , audio tapes or video tapes . Digital media has had

3910-505: Is described in a document produced in 1980 by the format's joint creators, Sony and Philips. The document is known colloquially as the Red Book CD-DA after the color of its cover. The format is a two-channel 16-bit PCM encoding at a 44.1 kHz sampling rate per channel. Four-channel sound was to be an allowable option within the Red Book format, but has never been implemented. Monaural audio has no existing standard on

4025-432: Is due to the development of the internet as well as the way in which users interact with media today. As more users join and use social media sites, the relevance of content creation increases. The release of technologies such mobile devices allow for easier and quicker access to all things media. Many media creation tools that were once available to only a few are now free and easy to use. The cost of devices that can access

4140-552: Is estimated that in the year 1986 less than 1% of the world's media storage capacity was digital and in 2007 it was already 94%. The year 2002 is assumed to be the year when human kind was able to store more information in digital than in analog media (the "beginning of the digital age "). Though they used machine-readable media, Babbage's engines, player pianos, jacquard looms and many other early calculating machines were themselves analog computers , with physical, mechanical parts. The first truly digital media came into existence with

4255-407: Is playable in standard CD players, thus making them backward compatible. CD- MIDI is a format used to store music-performance data, which upon playback is performed by electronic instruments that synthesize the audio. Hence, unlike the original Red Book CD-DA, these recordings are not digitally sampled audio recordings. The CD-MIDI format is defined as an extension of the original Red Book . For

4370-509: Is protected by a film of lacquer normally spin coated directly on the reflective layer. The label is printed on the lacquer layer, usually by screen printing or offset printing . CD data is represented as tiny indentations known as pits , encoded in a spiral track molded into the top of the polycarbonate layer. The areas between pits are known as lands . Each pit is approximately 100  nm deep by 500 nm wide, and varies from 850 nm to 3.5  μm in length. The distance between

4485-444: Is routinely extended to 80 minutes and 700  MiB ( 734,003,200  bytes), 90 minutes 800  MiB ( 838,860,800  bytes), or 99 minutes 870  MiB ( 912,261,120  bytes) by arranging data more closely on the same-sized disc. The Mini CD has various diameters ranging from 60 to 80 millimetres (2.4 to 3.1 in); they have been used for CD singles or delivering device drivers . The CD gained rapid popularity in

4600-468: Is so good that users cannot help but post it on their social media, they get a lot of "earned media". They win the credibility of the media compared to other forms of credibility, becoming more transparent. Codes and information by machines were first conceptualized by Charles Babbage in the early 1800s. Babbage imagined that these codes would give him instructions for his Motor of Difference and Analytical Engine, machines that Babbage had designed to solve

4715-458: Is sometimes known as new media or "the new media." Similarly, digital media seems to demand a new set of communications skills, called transliteracy , media literacy , or digital literacy . These skills include not only the ability to read and write—traditional literacy —but the ability to navigate the Internet, evaluate sources, and create digital content. The idea that we are moving toward

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4830-480: Is stored either in the lead-in area of the CD, where there are roughly five kilobytes of space available or in the subcode channels R to W on the disc, which can store about 31 megabytes. Compact Disc + Graphics is a special audio compact disc that contains graphics data in addition to the audio data on the disc. The disc can be played on a regular audio CD player, but when played on a special CD+G player, it can output

4945-510: Is the short video-sharing app TikTok . TikTok is a social media app that allows users to share short videos up to one minute in length, using a variety of visual effects and audio. According to Loyola University 's Chicago School of Law, around 50% of the music used on TikTok is unlicensed. TikTok has several music licensing agreements with various artists and labels, creating a library of fair and legal use of music. However, this does not cover all content for its users. A user could still commit

5060-429: Is used to lock material. This allows users to apply the media content to specific cases. DRM allows movie producers to rent at a lower price. This restricts the movie rental license length, rather than only selling the movie at full price. Additionally, DRM can prevent unauthorized modification or sharing of media. Digital media copyright protection technologies fall under intellectual property protection technology. This

5175-408: Is used: a change from either pit to land or land to pit indicates a 1, while no change indicates a series of 0s. There must be at least two, and no more than ten 0s between each 1, which is defined by the length of the pit. This, in turn, is decoded by reversing the eight-to-fourteen modulation used in mastering the disc, and then reversing the cross-interleaved Reed–Solomon coding , finally revealing

5290-483: The Compact Disc + Graphics (CD+G) format. Like CD+G, CD+EG uses basic CD-ROM features to display text and video information in addition to the music being played. This extra data is stored in subcode channels R-W. Very few CD+EG discs have been published. Super Audio CD (SACD) is a high-resolution, read-only optical audio disc format that was designed to provide higher-fidelity digital audio reproduction than

5405-727: The GNU Free Documentation License . Open licenses are one aspect of a broad open content movement that advocates for the reduction or removal of copyright restrictions from software, data, and other digital media. To facilitate the collection and consumption of such licensing information and availability status, tools like the Creative Commons Search engine are used mostly for web images, and Unpaywall , or used for scholarly communication . Additional software has been developed to restrict access to digital media. Digital rights management (DRM)

5520-522: The Red Book . Introduced in 1999, it was developed by Sony and Philips, the same companies that created the Red Book . SACD was in a format war with DVD-Audio , but neither has replaced audio CDs. The SACD standard is referred to as the Scarlet Book standard. Titles in the SACD format can be issued as hybrid discs; these discs contain the SACD audio stream as well as a standard audio CD layer which

5635-467: The public domain . By doing this, creators are giving up certain legal rights regarding their content. Fair use is a doctrine of the US Copyright Law that allows limited use of copyrighted materials without the need to obtain permission. There are four factors that make up fair use. The first, Purpose, refers to what the content is being used for. The second factor is what copyrighted content

5750-745: The vinyl revival . During the 2010s, the increasing popularity of solid-state media and music streaming services caused automakers to remove automotive CD players in favor of minijack auxiliary inputs, wired connections to USB devices and wireless Bluetooth connections. Automakers viewed CD players as using up valuable space and taking up weight which could be reallocated to more popular features, like large touchscreens. By 2021, only Lexus and General Motors were still including CD players as standard equipment with certain vehicles. CDs continued to be strong in some markets such as Japan where 132 million units were produced in 2019. The decline in CD sales has slowed in recent years; in 2021, CD sales increased in

5865-714: The 120 mm size was adopted. The adoption of EFM in June 1980 allowed 30 percent more playing time that would have resulted in 97 minutes for 120 mm diameter or 74 minutes for a disc as small as 100 millimetres (3.9 in). Instead, the information density was lowered by 30 percent to keep the playing time at 74 minutes. The 120 mm diameter has been adopted by subsequent formats, including Super Audio CD , DVD , HD DVD , and Blu-ray Disc. The 80-millimetre (3.1 in) diameter discs (" Mini CDs ") can hold up to 24 minutes of music or 210 MiB. The logical format of an audio CD (officially Compact Disc Digital Audio or CD-DA)

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5980-495: The 1990s, quickly outselling all other audio formats in the United States by 1991, ending the market dominance of the phonograph record and the cassette tape . By 2000, the CD accounted for 92.3% of the entire market share in regard to US music sales . The CD is considered the last dominant audio format of the album era , as the rise of MP3 , iTunes , cellular ringtones , and other downloadable music formats in

6095-609: The 2000s designed as successors to the CD: the Super Audio CD (SACD) and DVD-Audio . However neither of these were adopted partly due to increased relevance of digital (virtual) music and the apparent lack of audible improvements in audio quality to most human ears. These effectively extended the CD's longevity in the music market. With the advent and popularity of Internet-based distribution of files in lossy-compressed audio formats such as MP3 , sales of CDs began to decline in

6210-500: The 2000s. For example, between 2000 and 2008, despite overall growth in music sales and one anomalous year of increase, major-label CD sales declined overall by 20%. Despite rapidly declining sales year-over-year, the pervasiveness of the technology lingered for a time, with companies placing CDs in pharmacies, supermarkets, and filling station convenience stores to target buyers less likely to be able to use Internet-based distribution. In 2012, CDs and DVDs made up only 34% of music sales in

6325-461: The Apple App store. These are all opportunities for digital marketing efforts. A smartphone user is impacted with digital advertising every second they open their Apple or Android device. This further evidences the digital revolution and the impact of revolution. This has resulted in a total of 13 billion dollars being paid out to the various app developers over the years. This growth has fueled

6440-405: The CD was the second optical disc technology to be invented, after the much larger LaserDisc (LD). By 2007, 200 billion CDs (including audio CDs, CD-ROMs and CD-Rs) had been sold worldwide. Standard CDs have a diameter of 120 mm (4.7 in), and are designed to hold up to 74 minutes of uncompressed stereo digital audio or about 650   MiB ( 681,574,400  bytes) of data. Capacity

6555-465: The CD's introduction, Immink and Joseph Braat presented the first experiments with erasable compact discs during the 73rd AES Convention . In June 1985, the computer-readable CD-ROM (read-only memory) and, in 1990, recordable CD-R discs were introduced. Recordable CDs became an alternative to tape for recording and distributing music and could be duplicated without degradation in sound quality. Other newer video formats such as DVD and Blu-ray use

6670-471: The DAC. Even when using high-precision components, this approach was prone to decoding errors. Another issue was jitter , a time-related defect. Confronted with the instability of DACs, manufacturers initially turned to increasing the number of bits in the DAC and using several DACs per audio channel, averaging their output. This increased the cost of CD players but did not solve the core problem. A breakthrough in

6785-494: The Internet can participate in social media and contribute their own writing, art, videos, photography and commentary to the Internet, as well as conduct business online. The dramatic reduction in the costs required to create and share content have led to a democratization of content creation as well as the creation of new types of content, like blogs , memes , and video essays . Some of these activities have also been labelled citizen journalism . This spike in user-created content

6900-520: The Internet is steadily falling, and personal ownership of multiple digital devices is now becoming the standard. These elements have significantly affected political participation. Digital media is seen by many scholars as having a role in Arab Spring , and crackdowns on the use of digital and social media by embattled governments are increasingly common. Many governments restrict access to digital media in some way, either to prevent obscenity or in

7015-447: The US for the first time since 2004, with Axios citing its rise to "young people who are finding they like hard copies of music in the digital age". It came at the same time as both vinyl and cassette reached sales levels not seen in 30 years. The RIAA reported that CD revenue made a dip in 2022, before increasing again in 2023 and overtook downloading for the first time in over a decade. In

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7130-518: The US, 33.4 million CD albums were sold in the year 2022. In France in 2023, 10.5 million CDs were sold, almost double that of vinyl, but both of them represented generated 12% each of the French music industry revenues. Sony and Philips received praise for the development of the compact disc from professional organizations. These awards include: A CD is made from 1.2-millimetre (0.047 in) thick, polycarbonate plastic, and weighs 14–33 grams. From

7245-667: The United States. By 2015, only 24% of music in the United States was purchased on physical media, two thirds of this consisting of CDs; however, in the same year in Japan, over 80% of music was bought on CDs and other physical formats. In 2018, U.S. CD sales were 52 million units—less than 6% of the peak sales volume in 2000. In the UK, 32 million units were sold, almost 100 million fewer than in 2008. In 2018, Best Buy announced plans to decrease their focus on CD sales, however, while continuing to sell records, sales of which are growing during

7360-492: The ability to create, transmit and view digital media. Combined with the World Wide Web and the Internet , digital media has transformed 21st century society in a way that is frequently compared to the cultural, economic and social impact of the printing press . The change has been so rapid and so widespread that it has launched an economic transition from an industrial economy to an information-based economy, creating

7475-477: The analog special effects, stunt, and animation industries in Hollywood. It has imposed painful costs on small movie theaters, some of which did not or will not survive the transition to digital. The effect of digital media on other media industries is similarly sweeping and complex. Between 2000 and 2015, the print newspaper advertising revenue has fallen from $ 60 billion to a nearly $ 20 billion. Even one of

7590-416: The book industry, and digital textbooks and other media-inclusive curricula are changing primary and secondary education. In academia, digital media has led to a new form of scholarship, also called digital scholarship , making open access and open science possible thanks to the low cost of distribution. New fields of study have grown, such as digital humanities and digital history . It has changed

7705-405: The bottom of the polycarbonate layer. The change in height between pits and lands results in a difference in the way the light is reflected. Because the pits are indented into the top layer of the disc and are read through the transparent polycarbonate base, the pits form bumps when read. The laser hits the disc, casting a circle of light wider than the modulated spiral track reflecting partially from

7820-451: The center of the disc and proceeds toward the edge, which allows adaptation to the different sizes available. Standard CDs are available in two sizes. By far, the most common is 120 millimetres (4.7 in) in diameter, with a 74-, 80, 90, or 99-minute audio capacity and a 650, 700, 800, or 870 MiB (737,280,000-byte) data capacity. Discs are 1.2 millimetres (0.047 in) thick, with a 15 millimetres (0.59 in) center hole. The size of

7935-407: The center outward, components are: the center spindle hole (15 mm), the first-transition area (clamping ring), the clamping area (stacking ring), the second-transition area (mirror band), the program (data) area, and the rim. The inner program area occupies a radius from 25 to 58 mm. A thin layer of aluminum or, more rarely, gold is applied to the surface, making it reflective. The metal

8050-510: The channel such as business or person managing their online presence Earned media denotes public relations media channels like television, newspapers, blogs, or video sites that do not require direct payment or control by marketers but are included because viewers, readers, or users are interested in them. Free media is essentially online word of mouth, typically in "viral" trends, mentions, shares, retweets, reviews, recommendations, or content from third-party websites. When one's product or service

8165-570: The commercial landscape. While Android and iOS both dominate the smartphone market. A study By Gartner found that in 2016 about 88% of the worldwide smartphones were Android while iOS had a market share of about 12%. About 85% of the mobile market revenue came from mobile games. The impact of the digital revolution can also be assessed by exploring the amount of worldwide mobile smart device users there are. This can be split into 2 categories; smart phone users and smart tablet users. Worldwide there are currently 2.32 billion smartphone users across

8280-449: The compact disc has been credited to the cooperation between Philips and Sony, which together agreed upon and developed compatible hardware. The unified design of the compact disc allowed consumers to purchase any disc or player from any company and allowed the CD to dominate the at-home music market unchallenged. In 1974, Lou Ottens, director of the audio division of Philips, started a small group to develop an analog optical audio disc with

8395-469: The content in question when there are court orders and/or allegations of illegal use of the content on their site. As a result, YouTube has and continues to develop more policies and standards that go far past what the DMCA requires. YouTube has also created an algorithm which continuously scans their cite to make sure all content follows all policies. One digital media platform known to have copyright concerns

8510-405: The creation of this memex would be the work of scientists after World War II. Though the essay predated digital computers by several years, "As We May Think" anticipated the potential social and intellectual benefits of digital media and provided the conceptual framework for digital scholarship , the World Wide Web , wikis and even social media . It was recognized as a significant work even at

8625-565: The current copyright and intellectual property laws. The ease of creating, modifying, and sharing digital media can influence copyright enforcement challenging and many copyright laws are widely seen as outdated. Under current copyright law, common Internet memes are generally illegal to share in many countries. Legal rights can be unclear for many common Internet activities. These include posting pictures from someone else's social media account, writing fanfiction , or covering and/or using popular songs in content such as YouTube videos. During

8740-471: The development of millions of software applications. Most of these apps are able to generate income via in app advertising. Gross revenue for 2020 is projected to be about $ 189 million. Compared with print media , the mass media , and other analog technologies, digital media are easy to copy, store, share and modify. This quality of digital media has led to significant changes in many industries, especially journalism, publishing, education, entertainment, and

8855-421: The diagonal of an audio cassette. Heitaro Nakajima , who developed an early digital audio recorder within Japan's national public broadcasting organization, NHK , in 1970, became general manager of Sony's audio department in 1971. In 1973, his team developed a digital PCM adaptor that made audio recordings using a Betamax video recorder. After this, in 1974 the leap to storing digital audio on an optical disc

8970-516: The first few years of its existence, the CD was a medium used purely for audio. In 1988, the Yellow Book CD-ROM standard was established by Sony and Philips, which defined a non-volatile optical data computer data storage medium using the same physical format as audio compact discs, readable by a computer with a CD-ROM drive. Video CD (VCD, View CD, and Compact Disc digital video) is a standard digital format for storing video media on

9085-461: The first four UK albums by the Beatles were released in mono on compact disc. The growing acceptance of the CD in 1983 marks the beginning of the popular digital audio revolution. It was enthusiastically received, especially in the early-adopting classical music and audiophile communities, and its handling quality received particular praise. As the price of players gradually came down, and with

9200-526: The hole was chosen by Joop Sinjou and based on a Dutch 10-cent coin: a dubbeltje . Philips/Sony patented the physical dimensions. The official Philips history says the capacity was specified by Sony executive Norio Ohga to be able to contain the entirety of Beethoven's Ninth Symphony on one disc. This is a myth according to Kees Immink , as the EFM code format had not yet been decided in December 1979, when

9315-547: The internet becomes more and more prevalent, more companies are beginning to distribute content through internet only means. Indeed, young people today are increasingly likely to use TikTok over Google, television or newspapers for their news. With the loss of viewers, there is a loss of revenue but not as bad as what would be expected. As of 2024 there has also been a wave of those considered too controversial by main-stream media moving over to online platforms such as X (formerly Twitter) to keep spreading their messages. One instance

9430-502: The introduction of the portable Discman , the CD began to gain popularity in the larger popular and rock music markets. With the rise in CD sales, pre-recorded cassette tape sales began to decline in the late 1980s; CD sales overtook cassette sales in the early 1990s. In 1988, 400 million CDs were manufactured by 50 pressing plants around the world. Early CD players employed binary-weighted digital-to-analog converters (DAC), which contained individual electrical components for each bit of

9545-475: The label side of the disc. Scratches on the clear side can be repaired by refilling them with similar refractive plastic or by careful polishing. The edges of CDs are sometimes incompletely sealed, allowing gases and liquids to enter the CD and corrode the metal reflective layer and/or interfere with the focus of the laser on the pits, a condition known as disc rot . The fungus Geotrichum candidum has been found—under conditions of high heat and humidity—to consume

9660-510: The lands and partially from the top of any bumps where they are present. As the laser passes over a pit (bump), its height means that the round trip path of the light reflected from its peak is 1/2 wavelength out of phase with the light reflected from the land around it. This is because the height of a bump is around 1/4 of the wavelength of the light used, so the light falls 1/4 out of phase before reflection and another 1/4 wavelength out of phase after reflection. This causes partial cancellation of

9775-439: The larger issues that have occurred concerning digital media copyright. The piracy of digital media, such as film and television, directly impacts the copyright party (the owner of the copyright). This action can impact the "health" of the digital media industry. Piracy directly breaks the laws and morals of copyright. Along with piracy, digital media has contributed to the ability to spread false information or fake news . Due to

9890-418: The laser's reflection from the surface. By measuring the reflected intensity change with a photodiode , a modulated signal is read back from the disc. To accommodate the spiral pattern of data, the laser is placed on a mobile mechanism within the disc tray of any CD player. This mechanism typically takes the form of a sled that moves along a rail. The sled can be driven by a worm gear or linear motor . Where

10005-668: The last decade, the concepts of fair use and copyright have been applied to different types of online media. Copyright challenges are spreading to all parts of digital media. Content creators on platforms such as YouTube follow guidelines set by copyright, IP laws, and the platform's copyright requirements. If these guidelines are not followed, the content may get demonetized, deleted, or sued. The situation can also occur when creators accidentally use audio tracks or background scenes that are under copyright. To avoid or resolve some of these issues, content creators can voluntarily adopt open , or copyleft licenses or they can release their work to

10120-428: The late 1980s culminated in development of the 1-bit DAC , which converts high-resolution low-frequency digital input signal into a lower-resolution high-frequency signal that is mapped to voltages and then smoothed with an analog filter. The temporary use of a lower-resolution signal simplified circuit design and improved efficiency, which is why it became dominant in CD players starting from the early 1990s. Philips used

10235-448: The main trail or joining it by a side trail to a particular item. When it becomes evident that the elastic properties of available materials had a great deal to do with the bow, he branches off on a side trail which takes him through textbooks on elasticity and tables of physical constants. He inserts a page of longhand analysis of his own. Thus he builds a trail of his interest through the maze of materials available to him. Bush hoped that

10350-436: The mechanical combinations of the engine, the relationships and the nature of many subjects in which science necessarily relates in new subjects, and more deeply researched […] there are in all extensions of human power or additions to human knowledge, various collateral influences, in addition to the primary and primary object reached." Other old machine readable media include instructions for pianolas and weaving machines. It

10465-556: The mid-2000s ended the decade-long dominance of the CD. The format was later adapted (as CD-ROM ) for general purpose data storage and initially could hold much more data than a personal computer hard disk drive . Several other formats were further derived, both pre-pressed and blank user writable, including write-once audio and data storage ( CD-R ), rewritable media ( CD-RW ), Video CD (VCD), Super Video CD (SVCD), Photo CD , Picture CD , Compact Disc-Interactive ( CD-i ), Enhanced Music CD , and Super Audio CD (SACD) which may have

10580-402: The most popular days for papers, Sunday, has seen a 9% circulation decrease the lowest since 1945. In journalism, digital media and citizen journalism have led to the loss of thousands of jobs in print media and the bankruptcy of many major newspapers. But the rise of digital journalism has also created thousands of new jobs and specializations. E-books and self-publishing are changing

10695-401: The music business. The overall effect of these changes is so far-reaching that it is difficult to quantify. For example, in movie-making, the transition from analog film cameras to digital cameras is nearly complete. The transition has economic benefits to Hollywood, making distribution easier and making it possible to add high-quality digital effects to films. At the same time, it has affected

10810-440: The platform. Paid media refers to promotional channels that marketers pay to use, including traditional media (e.g., television, radio, print, or outdoor advertising), online and digital media (e.g., paid search ads, web and social media display ads, mobile ads, or email marketing). This model compels businesses to develop sponsored media then pay social media platforms like Instagram for the right to show such media to customers in

10925-413: The platforms' newsfeeds. These customers become exposed to paid media, sometimes referred to as promoted or sponsored posts. Owned media refers to digital assets and channels that a company or individual controls and manages. This includes websites, social media profiles for example Facebook etc., blogs, and any other content platforms own and operated by the entity. Entity means the owner or controller of

11040-534: The polycarbonate plastic and aluminium found in CDs. The data integrity of compact discs can be measured using surface error scanning , which can measure the rates of different types of data errors, known as C1 , C2 , CU and extended (finer-grain) error measurements known as E11 , E12 , E21 , E22 , E31 and E32 , of which higher rates indicate a possibly damaged or unclean data surface, low media quality, deteriorating media and recordable media written to by

11155-504: The prior art by Optophonie and James Russell, the information on the disc is read from a reflective layer using a laser as a light source through a protective substrate. Prototypes were developed by Philips and Sony independently in the late 1970s. Although originally dismissed by Philips Research management as a trivial pursuit, the CD became the primary focus for Philips as the LaserDisc format struggled. In 1979, Sony and Philips set up

11270-518: The problem of error in calculations. Between 1822 and 1823, the mathematician Ada Lovelace wrote the first instructions for calculating numbers on Babbage engines. Lovelace's instructions are now believed to be the first computer program. Although the machines were designed to perform analysis tasks, Lovelace anticipated the possible social impact of computers and program writing. "For in the distribution and combination of truths and formulas of analysis, which may become easier and more quickly subjected to

11385-543: The raw data stored on the disc. These encoding techniques (defined in the Red Book ) were originally designed for CD Digital Audio , but they later became a standard for almost all CD formats (such as CD-ROM ). CDs are susceptible to damage during handling and from environmental exposure. Pits are much closer to the label side of a disc, enabling defects and contaminants on the clear side to be out of focus during playback. Consequently, CDs are more likely to suffer damage on

11500-619: The rise of digital computers . Digital computers use binary code and Boolean logic to store and process information, allowing one machine in one configuration to perform many different tasks. The first modern, programmable, digital computers, the Manchester Mark 1 and the EDSAC , were independently invented between 1948 and 1949. Though different in many ways from modern computers, these machines had digital software controlling their logical operations . They were encoded in binary ,

11615-430: The same physical geometry as CD, and most DVD and Blu-ray players are backward compatible with audio CDs. CD sales in the United States peaked by 2000. By the early 2000s, the CD player had largely replaced the audio cassette player as standard equipment in new automobiles, with 2010 being the final model year for any car in the United States to have a factory-equipped cassette player. Two new formats were marketed in

11730-405: The scope of where digital magazines can be published; smartphones are an example. Thanks to the improvements in tablets and other personal electronic devices, digital magazines have become much more readable and enticing through the use of graphic art. The evolution of online magazines began to focus on becoming more of a social media and entertainment platform. Online piracy has become one of

11845-455: The skirmishes of the Crusades. He has dozens of possibly pertinent books and articles in his memex. First, he runs through an encyclopedia, finds an interesting but sketchy article, and leaves it projected. Next, in history, he finds another pertinent item and ties the two together. Thus he goes, building a trail of many items. Occasionally he inserts a comment of his own, either linking it into

11960-508: The standard in 1996. Philips coined the term compact disc in line with another audio product, the Compact Cassette , and contributed the general manufacturing process , based on video LaserDisc technology. Philips also contributed eight-to-fourteen modulation (EFM), while Sony contributed the error-correction method, CIRC, which offers resilience to defects such as scratches and fingerprints. The Compact Disc Story , told by

12075-441: The start of a new era in industrial history, called the Information Age , perhaps leading to a paperless society in which all media are produced and consumed on computers. However, challenges to a digital transition remain, including outdated copyright laws, censorship , the digital divide , and the spectre of a digital dark age , in which older media becomes inaccessible to new or upgraded information systems. Digital media has

12190-459: The time of its publication. Since the 1960s, computing power and storage capacity have increased exponentially, largely as a result of MOSFET scaling which enables MOS transistor counts to increase at a rapid pace predicted by Moore's law . Personal computers and smartphones put the ability to access, modify, store and share digital media in the hands of billions of people. Many electronic devices, from digital cameras to drones have

12305-547: The way libraries are used and their role in society. Every major media, communications and academic endeavor is facing a period of transition and uncertainty related to digital media. Often time the magazine or publisher have a Digital edition which can be referred to an electronic formatted version identical to the print version. There is a huge benefit to the publisher and cost, as half of traditional publishers' costs come from production, including raw materials, technical processing, and distribution. Since 2004, there has been

12420-460: The wide range of literacy and communications skills necessary to use it effectively, have deepened the digital divide between those who have access to digital media and those who do not. The rising of digital media has made the consumer's audio collection more precise and personalized. It is no longer necessary to purchase an entire album if the consumer is ultimately interested in only a few audio files. The rise of streaming services has led to

12535-416: The windings (the pitch ) is 1.6 μm (measured center-to-center, not between the edges). When playing an audio CD, a motor within the CD player spins the disc to a scanning velocity of 1.2–1.4 m/s ( constant linear velocity , CLV)—equivalent to approximately 500 RPM at the inside of the disc, and approximately 200 RPM at the outside edge. The track on the CD begins at the inside and spirals outward so

12650-474: The world. This figure is to exceed 2.87 billion by 2020. Smart tablet users reached a total of 1 billion in 2015, 15% of the world's population. The statistics evidence the impact of digital media communications today. What is also of relevance is the fact that the number of smart device users is rising rapidly yet the amount of functional uses increase daily. A smartphone or tablet can be used for hundreds of daily needs. There are currently over 1 million apps on

12765-582: The years have a multi camera set up as we would see on TV. Many of these creators also creating their own digital companies as their personalities grow. Personal devices have also seen an increase over the years. Over 1.5 billion users of tablets exist in this world right now and that is expected to slowly grow About 20% of people in the world regularly watch their content using tablets in 2018 User-generated content raises issues of privacy, credibility, civility and compensation for cultural, intellectual and artistic contributions. The spread of digital media, and

12880-574: Was chosen because it is half the vertical and half the horizontal resolution of the NTSC video. 352×288 is a similarly one-quarter PAL/SECAM resolution. This approximates the (overall) resolution of an analog VHS tape, which, although it has double the number of (vertical) scan lines, has a much lower horizontal resolution. Digital media Digital media platforms, such as YouTube , Kick , and Twitch , accounted for viewership rates of 27.9 billion hours in 2020. A contributing factor to its part in what

12995-462: Was easily made. Sony first publicly demonstrated an optical digital audio disc in September 1976. A year later, in September 1977, Sony showed the press a 30 cm (12 in) disc that could play an hour of digital audio (44,100 Hz sampling rate and 16-bit resolution) using modified frequency modulation encoding. In September 1978, the company demonstrated an optical digital audio disc with

13110-456: Was granted a patent in 1970. Following litigation, Sony and Philips licensed Russell's patents for recording in 1988. It is debatable whether Russell's concepts, patents, and prototypes instigated and in some measure influenced the compact disc's design. The compact disc is an evolution of LaserDisc technology, where a focused laser beam is used that enables the high information density required for high-quality digital audio signals. Unlike

13225-511: Was published on 1 March 1979. A week later, on 8 March, Philips publicly demonstrated a prototype of an optical digital audio disc at a press conference called "Philips Introduce Compact Disc" in Eindhoven , Netherlands. Sony executive Norio Ohga , later CEO and chairman of Sony, and Heitaro Nakajima were convinced of the format's commercial potential and pushed further development despite widespread skepticism. In 1979, Sony and Philips set up

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