Compact Disc Digital Audio - Revision history

92.23.200.245: /* References */ Pruned liks, (broken/missleading(shopping)/Spam)

2014-04-08T18:35:19Z

References: Pruned liks, (broken/missleading(shopping)/Spam)

← Older revision		Revision as of 18:35, 8 April 2014
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	== References ==		== References ==
	* [~~http://www.licensing.philips.com/information/cd/audio/~~ Licensing the CD audio technology at Philips]		* [Licensing the CD audio technology at Philips]
	* [~~http://www.disctronics.co.uk/technology/cdbasics/cd_books.htm~~ The meaning of each CD book colour]		* [The meaning of each CD book colour]
	* [~~http://www.oneoffcd.com/info/historycd.cfm~~ History of the CD]		* [History of the CD]
	* [~~http://www.cd-rw.org/ CD-rw.org,~~ a good resource on compact discs]		* [a good resource on compact discs]

	[[Category:Hardware]]		[[Category:Hardware]]
	[[Category:CD ripping]]		[[Category:CD ripping]]

Jan at 19:26, 29 July 2010

2010-07-29T19:26:39Z

← Older revision		Revision as of 19:26, 29 July 2010
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	[[Category:Hardware]]		[[Category:Hardware]]
			[[Category:CD ripping]]

Speckmade: corrected info on principle of pressed CDs. Native english speakers: Please correct my language if necessary

2007-06-14T13:34:36Z

corrected info on principle of pressed CDs. Native english speakers: Please correct my language if necessary

← Older revision		Revision as of 13:34, 14 June 2007
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	The data in a CD starts in the inside of the disc and is read in a spiral towards the outer edge. The standard defines that a CD can contain 74 minutes of audio (rumour has it that this number was decided so that Beethoven's 9th symphony would fit inside a CD). Later, manufacturers managed to push that limit to 80 minutes.		The data in a CD starts in the inside of the disc and is read in a spiral towards the outer edge. The standard defines that a CD can contain 74 minutes of audio (rumour has it that this number was decided so that Beethoven's 9th symphony would fit inside a CD). Later, manufacturers managed to push that limit to 80 minutes.

	A CD is a disc of polycarbonate with a reflective layer. Pressed CDs have pits that ~~either deflect~~ the laser or ~~let it pass through to the reflective layer~~, that way generating a binary method to store information. In the case of a CD-R, it contains a pigment that is burned by the writing laser so that the reading laser will deflect when hitting it. Parts not burned will let the laser pass through to the reflective layer.		A CD is a disc of polycarbonate with a reflective layer. Pressed CDs have pits that are one quarter of the reading laser's wavelength deep so that the reflected laser beam either cancels or amplifies itself when overlayed with its echo, that way generating a binary method to store information. In the case of a CD-R, it contains a pigment that is burned by the writing laser so that the reading laser will deflect when hitting it. Parts not burned will let the laser pass through to the reflective layer.

	A CD has a diameter of 12 centimeters / 4.7 inches. There's also a smaller physical format of only 8 centimeters.		A CD has a diameter of 12 centimeters / 4.7 inches. There's also a smaller physical format of only 8 centimeters.

	== Succession Candidates? ==		== Succession Candidates? ==
	There are some drawbacks to the CD, and various parties have pushed [[DVD-Audio]] and [[SACD]] as replacement for CD.		There are some drawbacks to the Audio CD, and various parties have pushed [[DVD-Audio]] and [[Super Audio Compact Disc\|SACD]] as replacement for Audio CD.

	== References ==		== References ==

Speckmade: Compact Disc moved to Compact Disc Digital Audio

2007-06-13T20:16:05Z

Compact Disc moved to Compact Disc Digital Audio

← Older revision	Revision as of 20:16, 13 June 2007
(No difference)

Speckmade at 17:20, 13 June 2007

2007-06-13T17:20:00Z

← Older revision		Revision as of 17:20, 13 June 2007
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	'''~~CDDA~~''' -- '''~~Compact Disc Digital Audio~~''' -- is surely the most popular audio recording delivery media these days. The media itself is cheap, quality is very good, it's easy to use and it's playable virtually everywhere.		'''Compact Disc Digital Audio''' ('''CDDA''') is surely the most popular audio recording delivery media these days. The media itself is cheap, quality is very good, it's easy to use and it's playable virtually everywhere.


	~~==History==~~

			== History ==
	The CD format was developed as a joint cooperation between [http://www.sony.com Sony] and [http://www.philips.com Philips] in the late seventies, and was released by them as the [[Red Book]] standard in the eighties.		The CD format was developed as a joint cooperation between [http://www.sony.com Sony] and [http://www.philips.com Philips] in the late seventies, and was released by them as the [[Red Book]] standard in the eighties.

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	Since the format was so amazingly successful, Sony and Philips got together again in 1987 to standardize Video CD (White Book). Later on, they would still cooperate in developing CD-ROM and CD-ROM XA (Yellow Book), Enhanced CD/CD Extra (Blue Book) and CD-R/CD-RW (Orange Book).		Since the format was so amazingly successful, Sony and Philips got together again in 1987 to standardize Video CD (White Book). Later on, they would still cooperate in developing CD-ROM and CD-ROM XA (Yellow Book), Enhanced CD/CD Extra (Blue Book) and CD-R/CD-RW (Orange Book).

			== Specifications ==
	==Specifications==

	[[PCM]] audio is usually pressed on CD with the following characteristics:		[[PCM]] audio is usually pressed on CD with the following characteristics:

	* [[Stereo]] sound		* [[Stereo]] sound
	* 44.~~1kHz~~ [[Sampling rate]]		* 44.1 kHz [[Sampling rate]]
	* 16 bit depth		* 16 bit depth

	There are also provisions in the standard for quadraphonic audio (4 channels, 22.~~05kHz~~ sampling rate), but it's very rarely used.		There are also provisions in the standard for quadraphonic audio (4 channels, 22.05 kHz sampling rate), but it's very rarely used.

	There is some error correction ~~and detection~~ code in CDDA. It's called C1 and C2 information, and is based on Reed-Solomon algorithms.		There is some error detection and correction code in CDDA. It's called [[C1]] and [[C2]] information, and is based on Reed-Solomon algorithms.

	The data in a CD starts in the inside of the disc and is read in a spiral towards the outer edge. The standard defines that a CD can contain 74 minutes of audio (rumour has it that this number was decided so that Beethoven's 9th symphony would fit inside a CD). Later, manufacturers managed to push that limit to 80 minutes.		The data in a CD starts in the inside of the disc and is read in a spiral towards the outer edge. The standard defines that a CD can contain 74 minutes of audio (rumour has it that this number was decided so that Beethoven's 9th symphony would fit inside a CD). Later, manufacturers managed to push that limit to 80 minutes.
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	A CD has a diameter of 12 centimeters / 4.7 inches. There's also a smaller physical format of only 8 centimeters.		A CD has a diameter of 12 centimeters / 4.7 inches. There's also a smaller physical format of only 8 centimeters.

			== Succession Candidates? ==
	==Succession Candidates?==

	There are some drawbacks to the CD, and various parties have pushed [[DVD-Audio]] and [[SACD]] as replacement for CD.		There are some drawbacks to the CD, and various parties have pushed [[DVD-Audio]] and [[SACD]] as replacement for CD.

			== References ==
	==References==

	* [http://www.licensing.philips.com/information/cd/audio/ Licensing the CD audio technology at Philips]		* [http://www.licensing.philips.com/information/cd/audio/ Licensing the CD audio technology at Philips]
	* [http://www.disctronics.co.uk/technology/cdbasics/cd_books.htm The meaning of each CD book colour]		* [http://www.disctronics.co.uk/technology/cdbasics/cd_books.htm The meaning of each CD book colour]

Speckmade: CD moved to Compact Disc

2007-06-13T17:11:46Z

CD moved to Compact Disc

← Older revision	Revision as of 17:11, 13 June 2007
(No difference)

HotshotGG at 19:10, 9 December 2006

2006-12-09T19:10:16Z

← Older revision		Revision as of 19:10, 9 December 2006
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	==~~External Links~~==		==References==

	* [http://www.licensing.philips.com/information/cd/audio/ Licensing the CD audio technology at Philips]		* [http://www.licensing.philips.com/information/cd/audio/ Licensing the CD audio technology at Philips]
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	* [http://www.oneoffcd.com/info/historycd.cfm History of the CD]		* [http://www.oneoffcd.com/info/historycd.cfm History of the CD]
	* [http://www.cd-rw.org/ CD-rw.org, a good resource on compact discs]		* [http://www.cd-rw.org/ CD-rw.org, a good resource on compact discs]

			[[Category:Hardware]]

Pepoluan: Reformatting, slight rewrite, add info of small CD (I forgot the size -- please confirm/correct)

2006-12-08T11:10:22Z

Reformatting, slight rewrite, add info of small CD (I forgot the size -- please confirm/correct)

← Older revision		Revision as of 11:10, 8 December 2006
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	~~=Introduction=~~		'''CDDA''' -- '''Compact Disc Digital Audio''' -- is surely the most popular audio recording delivery media these days. The media itself is cheap, quality is very good, it's easy to use and it's playable virtually everywhere.

	CDDA - Compact Disc Digital Audio - is surely the most popular audio recording delivery media these days. The media itself is cheap, quality is very good, it's easy to use and it's playable everywhere.


Line 11:		Line 9:

	Since the format was so amazingly successful, Sony and Philips got together again in 1987 to standardize Video CD (White Book). Later on, they would still cooperate in developing CD-ROM and CD-ROM XA (Yellow Book), Enhanced CD/CD Extra (Blue Book) and CD-R/CD-RW (Orange Book).		Since the format was so amazingly successful, Sony and Philips got together again in 1987 to standardize Video CD (White Book). Later on, they would still cooperate in developing CD-ROM and CD-ROM XA (Yellow Book), Enhanced CD/CD Extra (Blue Book) and CD-R/CD-RW (Orange Book).


	==Specifications==		==Specifications==
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	* 44.1kHz [[Sampling rate]]		* 44.1kHz [[Sampling rate]]
	* 16 bit depth		* 16 bit depth



	There are also provisions in the standard for quadraphonic audio (4 channels, 22.05kHz sampling rate), but it's very rarely used.		There are also provisions in the standard for quadraphonic audio (4 channels, 22.05kHz sampling rate), but it's very rarely used.
Line 30:		Line 27:
	A CD is a disc of polycarbonate with a reflective layer. Pressed CDs have pits that either deflect the laser or let it pass through to the reflective layer, that way generating a binary method to store information. In the case of a CD-R, it contains a pigment that is burned by the writing laser so that the reading laser will deflect when hitting it. Parts not burned will let the laser pass through to the reflective layer.		A CD is a disc of polycarbonate with a reflective layer. Pressed CDs have pits that either deflect the laser or let it pass through to the reflective layer, that way generating a binary method to store information. In the case of a CD-R, it contains a pigment that is burned by the writing laser so that the reading laser will deflect when hitting it. Parts not burned will let the laser pass through to the reflective layer.

	A CD has a diameter of 12 centimeters / 4.7 inches.		A CD has a diameter of 12 centimeters / 4.7 inches. There's also a smaller physical format of only 8 centimeters.


	~~==Links==~~

	~~See also: candidates to CD succession: [[DVD-Audio]] and [[SACD]]~~		==Succession Candidates?==

	~~[http://www.licensing.philips.com/information/cd/audio/ Licensing~~ the CD ~~audio technology at Philips~~]		There are some drawbacks to the CD, and various parties have pushed [[DVD-Audio]] and [[SACD]] as replacement for CD.

	~~[http://www.disctronics.co.uk/technology/cdbasics/cd_books.htm The meaning of each CD book colour]~~

	~~[http://www.oneoffcd.com/info/historycd.cfm History of the CD]~~		==External Links==

	[http://www.cd-rw.org/ CD-rw.org, a good resource on compact discs]		* [http://www.licensing.philips.com/information/cd/audio/ Licensing the CD audio technology at Philips]
			* [http://www.disctronics.co.uk/technology/cdbasics/cd_books.htm The meaning of each CD book colour]
			* [http://www.oneoffcd.com/info/historycd.cfm History of the CD]
			* [http://www.cd-rw.org/ CD-rw.org, a good resource on compact discs]

Rjamorim: /* History */ typo

2005-10-10T21:49:08Z

History: typo

← Older revision		Revision as of 21:49, 10 October 2005
Line 8:		Line 8:
	The CD format was developed as a joint cooperation between [http://www.sony.com Sony] and [http://www.philips.com Philips] in the late seventies, and was released by them as the [[Red Book]] standard in the eighties.		The CD format was developed as a joint cooperation between [http://www.sony.com Sony] and [http://www.philips.com Philips] in the late seventies, and was released by them as the [[Red Book]] standard in the eighties.

	It was an instant success. It was introduced in the United States in 1983, and in the same year 30,000 players and 800,000 discs were sold. In 1986, the numbers raised to 3 million players and 53 million discs. In early nineties, players were selling at a rate of 9.2 million units each year, and at the same period of time ~~and~~ average of 288 million discs left store shelves.		It was an instant success. It was introduced in the United States in 1983, and in the same year 30,000 players and 800,000 discs were sold. In 1986, the numbers raised to 3 million players and 53 million discs. In early nineties, players were selling at a rate of 9.2 million units each year, and at the same period of time an average of 288 million discs left store shelves.

	Since the format was so amazingly successful, Sony and Philips got together again in 1987 to standardize Video CD (White Book). Later on, they would still cooperate in developing CD-ROM and CD-ROM XA (Yellow Book), Enhanced CD/CD Extra (Blue Book) and CD-R/CD-RW (Orange Book).		Since the format was so amazingly successful, Sony and Philips got together again in 1987 to standardize Video CD (White Book). Later on, they would still cooperate in developing CD-ROM and CD-ROM XA (Yellow Book), Enhanced CD/CD Extra (Blue Book) and CD-R/CD-RW (Orange Book).


	==Specifications==		==Specifications==

221.153.157.92 at 03:49, 2 February 2005

2005-02-02T03:49:57Z

← Older revision		Revision as of 03:49, 2 February 2005
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	==Specifications==		==Specifications==

	~~The~~ audio is usually pressed on CD with the following characteristics:		[[PCM]] audio is usually pressed on CD with the following characteristics:

	* [[Stereo]] sound		* [[Stereo]] sound
	* 44.1kHz [[Sampling rate]]		* 44.1kHz [[Sampling rate]]
	* 16 bit depth		* 16 bit depth



	There are also provisions in the standard for quadraphonic audio (4 channels, 22.05kHz sampling rate), but it's very rarely used.		There are also provisions in the standard for quadraphonic audio (4 channels, 22.05kHz sampling rate), but it's very rarely used.