64 kbs mono as good as 128 kbps dual channel? |
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64 kbs mono as good as 128 kbps dual channel? |
 Dec 21 2006, 14:03
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#1
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 Group: Members Posts: 3620 Joined: 14-May 03 From: Bad Herrenalb Member No.: 6613  |
Hey folks...
is a 64 kbps mono MP3 file as good as an 128 kbps dual channel MP3? What about stereo / joint stereo - I guess that doesn't apply there for sure since bits can be shared across channels, or am I wrong? Sebastian -------------------- http://listening-tests.hydrogenaudio.org/sebastian/
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Dec 21 2006, 14:49
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#2
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 Nero MPEG4 developer Group: Developer (Donating) Posts: 1218 Joined: 11-October 01 From: LA Member No.: 267 |
2 mono files will have 2 times more headers than 1 dual channel file. So the dual channel file will have 4 bytes extra for audio data per frame.
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Dec 21 2006, 15:00
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#3
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Nero MPEG4 developer Group: Developer (Donating) Posts: 1218 Joined: 11-October 01 From: LA Member No.: 267 |
It's actually 5 bytes, as a 64kbps frame is 208 bytes and a 128kbps frame is 417 bytes.
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Dec 21 2006, 15:03
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#4
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 LAME developer Group: Developer Posts: 2950 Joined: 1-October 01 From: Nanterre, France Member No.: 138 |
Basically "dual channel" means that you have to streams of independant content. (exemple: dual language)
While you'd better not use any interchannel masking, and obvisouly it's forbidden to use joint stereo, you can still distribute bits based on channels complexity. You can consider it as a constant bitrate multiplexing of 2 vbr channels. |
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Lo-Fi Version | Time is now: 24th May 2013 - 12:23 |
