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History of CD
Students: Kunakbaew Artem Ravilevich & Olenin Maksim Maksimovich Teacher: Aituganowa Jhanna Ilewna
Understand how the compact Disk was created and how it exists in 2021
Tasks: 1.CD what is that? 2.History of creating CD 3.CD’s today
Our goal is to tell you what a CD is by whom and how it was created, and also to tell you a couple of interesting facts about CD
CD - WHAT IS THAT?
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. In August 1982, the first compact disc was manufactured. It was then released in October 1982 and branded as Digital Audio Compact Disc.
Standard CDs have a diameter of 120 millimetres (4.7 in) and are designed to hold up to 74 minutes of uncompressed stereo digital audio or about 650 MB of data. Capacity is routinely extended to 80 minutes and 700 MB by arranging more data 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 are sometimes used for CD singles, storing up to 24 minutes of audio, or delivering device drivers.
History of creating CD
The CD was developed and introduced in 1980 by Philips and Sony. Signal coding method - Pulse Code Modulation (PCM). The release of the first commercial (prototypes of CDs were produced earlier) music CD was announced on June 20, 1982, and on August 17 of the same year, at the Polygram recording plant located in Langenhagen near Hanover, the world's first commercial CD was released, commissioned by Philips. -disk, thus initiating their mass production. The honor of being released on CD for the first time went to ABBA with the album "The Visitors"
The first CD to hit record stores was Billy Joel's 1978 album 52nd Street. CD sales of this recording began in Japan on October 1, 1982.
Music sold online today accounts for more than a third of all music sales in the United States. Among the corresponding services, the iTunes online store leads by a significant margin. The traditional CD format has so far managed to maintain its dominant position, however, according to analysts, the days of CDs are already numbered.According to the report, exactly a quarter of all music products purchased by American music lovers in 2009 came from the iTunes Store. In addition to iTunes, online music retailers Amazon and Walmart contributed significantly to the development of the new business model.Considering online music sales as a distinct segment, iTunes accounts for 69 percent of that market as of the first half of 2009. Amazon MP3, which ranks second in the ranking, lags far behind the leader with its eight percent.Marketers assure that the volume of music sales via Internet services will be equal to CD sales by the end of next year. Analysts have every reason for such predictions. Earlier this year, NPD reported that 17 million consumers stopped buying music on CDs in 2008, even as the number of music lovers continues to grow.
1.Sony and Philips teamed up to create the CD format and set a new standard for audio formats.
2.The first commercially produced CD player was the Sony CDP-101 and was released in 1982.
3.The first CD player was $1,500.
4.CDs have a bitrate of 1,411. This is 4x clearer than the quality you would get from and downloadable format. Such as music that you would get from your computer, cell phone, streaming, the radio and more. A standard bitrate from those formats is 160 to 320.
6.CDs are made out of polycarbonate plastic.
5.The diameter of a CD is 120mm.
7.The audio from a CD relies on little pits within the disc and there are up to 16 billion pits on a disc.
8.There are disc changers available with capacities ranging from 2 CDs to 403 CDs.
9.James Russell was the inventor of optical digital recording and playback concept.
10By the year 2007, 200 billion CDs had been sold.
11.The first CD was the album Living Eyes by the Bee Gees.
12.CDs have a standard capacity of 74 minutes.
13.The first CD player was released and Japan and wasn't available in the USA until months later.