Parametric stereo - Revision history

Artoria2e5: Redirected page to Joint stereo#Parametric stereo

2023-07-16T05:26:57Z

Redirected page to Joint stereo#Parametric stereo

← Older revision		Revision as of 05:26, 16 July 2023
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	~~''Information <u>adapted</u> from~~ [~~http://en.wikipedia.org/wiki/Parametric_stereo wikipedia]''~~		#REDIRECT [[Joint stereo#Parametric stereo]]

	~~'''Parametric stereo''' is a feature used in~~ [~~[AAC]] to further enhance efficiency in low bandwidth~~ stereo ~~media. It, along with [[SBR]], is part of '''[[aacPlus]] v2''', and MPEG-4 HE-AACv2.~~

	Parametric stereo works by taking the two mono streams that make up a stereo stream and combining them together to form a new single mono audio stream, but 2-3 kbit/s of side info (the parametric stereo) is also recorded. By having the parametric stereo side info along with the mono audio stream, the decoder (player) can '''approximate''' the original stereo.

	Because only one real audio signal is sent, along with the negligible side info, a 24 kbit/s stereo stream of audio and a 24 kbit/s stream of audio with parametric stereo will be drastically different in quality. This can be modeled as:

	~~:12 kbit/s mono + 12 kbit/s mono = 24 kbit/s~~

	~~But, with parametric stereo:~~

	~~:22 kbit/s mono + 2 kbit/s PS side info = 24 kbit/s~~

	~~This makes the overall sound quality sound like a 22 kbit/s per channel piece of audio, rather than a 12 kbit/s piece of audio. That's 10 kbit/s more per channel, making the comparison more like:~~

	~~:24 kbit/s vs. 44 kbit/s~~

	~~for the same amount of data.~~

	~~==External link==~~

	* [http://www.codingtechnologies.com/products/paraSter.htm Parametric Stereo at Coding Technologies]


	~~[[Category:Technical]]~~
	~~[[Category:Algorithms~~]]

Artoria2e5 at 11:05, 23 April 2023

2023-04-23T11:05:24Z

← Older revision		Revision as of 11:05, 23 April 2023
Line 7:		Line 7:
	Because only one real audio signal is sent, along with the negligible side info, a 24 kbit/s stereo stream of audio and a 24 kbit/s stream of audio with parametric stereo will be drastically different in quality. This can be modeled as:		Because only one real audio signal is sent, along with the negligible side info, a 24 kbit/s stereo stream of audio and a 24 kbit/s stream of audio with parametric stereo will be drastically different in quality. This can be modeled as:

	12 kbit/s mono + 12 kbit/s mono = 24 kbit/s		:12 kbit/s mono + 12 kbit/s mono = 24 kbit/s

	But, with parametric stereo:		But, with parametric stereo:

	22 kbit/s mono + 2 kbit/s PS side info = 24 kbit/s		:22 kbit/s mono + 2 kbit/s PS side info = 24 kbit/s

	This makes the overall sound quality sound like a 22 kbit/s per channel piece of audio, rather than a 12 kbit/s piece of audio. That's 10 kbit/s more per channel, making the comparison more like:		This makes the overall sound quality sound like a 22 kbit/s per channel piece of audio, rather than a 12 kbit/s piece of audio. That's 10 kbit/s more per channel, making the comparison more like:

	24 kbit/s vs. 44 kbit/s		:24 kbit/s vs. 44 kbit/s

	for the same amount of data.		for the same amount of data.

Bp at 01:23, 27 December 2014

2014-12-27T01:23:42Z

← Older revision		Revision as of 01:23, 27 December 2014
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	''Information <u>adapted</u> from [http://en.wikipedia.org/wiki/Parametric_stereo wikipedia]''		''Information <u>adapted</u> from [http://en.wikipedia.org/wiki/Parametric_stereo wikipedia]''

	'''Parametric stereo''' is a feature used in [[AAC]] to further enhance efficiency in low bandwidth stereo media. It, along with [[SBR]], is part of '''aacPlus v2'''.		'''Parametric stereo''' is a feature used in [[AAC]] to further enhance efficiency in low bandwidth stereo media. It, along with [[SBR]], is part of '''[[aacPlus]] v2''', and MPEG-4 HE-AACv2.

	Parametric stereo works by taking the two mono streams that make up a stereo stream and combining them together to form a new single mono audio stream, but 2-3 kbit/s of side info (the parametric stereo) is also recorded. By having the parametric stereo side info along with the mono audio stream, the decoder (player) can '''approximate''' the original stereo.		Parametric stereo works by taking the two mono streams that make up a stereo stream and combining them together to form a new single mono audio stream, but 2-3 kbit/s of side info (the parametric stereo) is also recorded. By having the parametric stereo side info along with the mono audio stream, the decoder (player) can '''approximate''' the original stereo.

HotshotGG: .. it's a good start. Eventually we can include another source and use the writing from that. PS is also a data algorithm.

2006-10-02T20:35:39Z

.. it's a good start. Eventually we can include another source and use the writing from that. PS is also a data algorithm.

← Older revision		Revision as of 20:35, 2 October 2006
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	[[Category:Technical]]		[[Category:Technical]]
			[[Category:Algorithms]]

Pepoluan: fix link to SBR and a skipped linebreak

2006-10-02T20:18:08Z

fix link to SBR and a skipped linebreak

← Older revision		Revision as of 20:18, 2 October 2006
Line 1:		Line 1:
	''Information <u>adapted</u> from [http://en.wikipedia.org/wiki/Parametric_stereo wikipedia]''		''Information <u>adapted</u> from [http://en.wikipedia.org/wiki/Parametric_stereo wikipedia]''

	'''Parametric stereo''' is a feature used in [[AAC]] to further enhance efficiency in low bandwidth stereo media. It, along with [[~~Spectral Band Replication~~]], is part of '''aacPlus v2'''.		'''Parametric stereo''' is a feature used in [[AAC]] to further enhance efficiency in low bandwidth stereo media. It, along with [[SBR]], is part of '''aacPlus v2'''.

	Parametric stereo works by taking the two mono streams that make up a stereo stream and combining them together to form a new single mono audio stream, but 2-3 kbit/s of side info (the parametric stereo) is also recorded. By having the parametric stereo side info along with the mono audio stream, the decoder (player) can '''approximate''' the original stereo.		Parametric stereo works by taking the two mono streams that make up a stereo stream and combining them together to form a new single mono audio stream, but 2-3 kbit/s of side info (the parametric stereo) is also recorded. By having the parametric stereo side info along with the mono audio stream, the decoder (player) can '''approximate''' the original stereo.

	Because only one real audio signal is sent, along with the negligible side info, a 24 kbit/s stereo stream of audio and a 24 kbit/s stream of audio with parametric stereo will be drastically different in quality. This can be modeled as:		Because only one real audio signal is sent, along with the negligible side info, a 24 kbit/s stereo stream of audio and a 24 kbit/s stream of audio with parametric stereo will be drastically different in quality. This can be modeled as:

	12 kbit/s mono + 12 kbit/s mono = 24 kbit/s		12 kbit/s mono + 12 kbit/s mono = 24 kbit/s

	But, with parametric stereo:		But, with parametric stereo:
	22 kbit/s mono + 2 kbit/s PS side info = 24 kbit/s
			22 kbit/s mono + 2 kbit/s PS side info = 24 kbit/s

	This makes the overall sound quality sound like a 22 kbit/s per channel piece of audio, rather than a 12 kbit/s piece of audio. That's 10 kbit/s more per channel, making the comparison more like:		This makes the overall sound quality sound like a 22 kbit/s per channel piece of audio, rather than a 12 kbit/s piece of audio. That's 10 kbit/s more per channel, making the comparison more like:

Pepoluan at 20:14, 2 October 2006

2006-10-02T20:14:35Z

New page

''Information <u>adapted</u> from [http://en.wikipedia.org/wiki/Parametric_stereo wikipedia]''

'''Parametric stereo''' is a feature used in [[AAC]] to further enhance efficiency in low bandwidth stereo media. It, along with [[Spectral Band Replication]], is part of '''aacPlus v2'''.

Parametric stereo works by taking the two mono streams that make up a stereo stream and combining them together to form a new single mono audio stream, but 2-3 kbit/s of side info (the parametric stereo) is also recorded. By having the parametric stereo side info along with the mono audio stream, the decoder (player) can '''approximate''' the original stereo.

Because only one real audio signal is sent, along with the negligible side info, a 24 kbit/s stereo stream of audio and a 24 kbit/s stream of audio with parametric stereo will be drastically different in quality. This can be modeled as:

12 kbit/s mono + 12 kbit/s mono = 24 kbit/s

But, with parametric stereo:
22 kbit/s mono + 2 kbit/s PS side info = 24 kbit/s

This makes the overall sound quality sound like a 22 kbit/s per channel piece of audio, rather than a 12 kbit/s piece of audio. That's 10 kbit/s more per channel, making the comparison more like:

24 kbit/s vs. 44 kbit/s

for the same amount of data.

==External link==

* [http://www.codingtechnologies.com/products/paraSter.htm Parametric Stereo at Coding Technologies]

[[Category:Technical]]