Difference between revisions of "RealAudio cook"

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(Cook is now complete.)
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* Samples: http://samples.mplayerhq.hu/real/AC-cook/
* Samples: http://samples.mplayerhq.hu/real/AC-cook/


RealAudio cook (a.k.a. Cooker a.k.a. gecko) is an audio codec created by [[Real]]. It features different coding modes, of which cook 5.1 is not yet supported by the decoder in [[FFmpeg]].
RealAudio cook (a.k.a. Cooker a.k.a. gecko) is an audio codec created by [[Real]]. It features different coding modes.


Cook Flavors
Cook Flavors
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[[Category:Audio Codecs]]
[[Category:Audio Codecs]]
[[Category:Incomplete Audio Codecs]]
[[Category: MDCT Audio Codecs]]
[[Category: MDCT Audio Codecs]]
[[Category: Multichannel Audio Codecs]]
[[Category: Multichannel Audio Codecs]]

Revision as of 02:53, 25 April 2009

RealAudio cook (a.k.a. Cooker a.k.a. gecko) is an audio codec created by Real. It features different coding modes.

Cook Flavors

00  8 Kbps Music - RealAudio
01  11 Kbps Music - RealAudio
02  16 Kbps Music - RealAudio
03  20 Kbps Music - RealAudio
04  32 Kbps Music - RealAudio
05  44 Kbps Music - RealAudio
06  64 Kbps Music - RealAudio
07  32 Kbps - RealAudio
08  6 Kbps Music - RealAudio
09  20 Kbps Stereo Music
10  32 Kbps Stereo Music
11  44 Kbps Stereo Music
12  64 Kbps Stereo Music
13  96 Kbps Stereo Music
14  64 Kbps - RealAudio
15  20 Kbps Music High Response - RealAudio
16  32 Kbps Music High Response - RealAudio
17  16 Kbps Stereo Music - RealAudio
18  20 Kbps Stereo Music - RealAudio
19  20 Kbps Stereo Music High Response - RealAudio
20  32 Kbps Stereo Music - RealAudio
21  32 Kbps Stereo Music High Response - RealAudio
22  44 Kbps Stereo Music - RealAudio
23  44 Kbps Stereo Music High Response - RealAudio
24  64 Kbps Stereo Music - RealAudio
25  96 Kbps Stereo Music - RealAudio
26  12 Kbps Stereo Music - RealAudio
27  64 kbps Stereo Surround - RealAudio
28  96 kbps Stereo Surround - RealAudio
29  44 kbps Stereo Surround - RealAudio
30  96 Kbps 5.1 Multichannel - RealAudio 10
31  132 Kbps 5.1 Multichannel - RealAudio 10
32  184 Kbps 5.1 Multichannel - RealAudio 10
33  268 Kbps 5.1 Multichannel - RealAudio 10

Type Specific Data

Cook data is encapsulated in RealMedia files which transport type specific data needed by different codecs. Cook requires 8 bytes of type specific data for monophonic audio and 16 bytes for stereo data. Multi-byte numbers are big-endian:

mono and stereo data:

 bytes 0-3    Cook version
 bytes 4-5    samples per frame per channel
 bytes 6-7    number of subbands used in the frequency domain

stereo data requires 8 more bytes:

 bytes 8-11   unused
 bytes 12-13  joint stereo subband start
 bytes 14-15  joint stereo VLC bits