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Multichannel audio quality
~*McoreD*~
post Nov 30 2003, 05:13
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Hi there guys,

When I was suggesting 128kbps Windows Media Audio 9 Professional would be enough for "CD Quality" to convert an AC3 file (which is extracted from DVD), one of my friends said:

QUOTE
I don't think 128kbps is good enough for encoding 5.1 sound. Think about it. 128 / 6 is 21.3. That's 21.3 kbps for each channel. That's the equivalent of encoding stereo sound at 42 kbps. I really don't think that's enough. I would recommend 384kbps for 5.1 sound. That's more like 128kbps for stereo and will sound much better.


My question: Is it how it works?

If that's correct we will need 384kbps at least in order to deliver 64kbps for each channel.

Thank you,
McoreD


Edit: Thanks guys for all your replied. Always learning something new. smile.gif

This post has been edited by ~*McoreD*~: Dec 24 2003, 02:15
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Latexxx
post Dec 2 2003, 20:37
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QUOTE (rjamorim @ Dec 2 2003, 07:34 AM)
QUOTE (Latexxx @ Dec 2 2003, 01:31 PM)
Microsoft claims(http://www.microsoft.com/windows/windowsmedia/9series/codecs.aspx) that wma pro @ 192 - 256 would be similar to 384kbps ac3.

Microsoft also claims WMA std has the same quality of MP3 at half bitrate.

The page, which I am referring to, isn't ment to be read by some lamers who believe that xing mp3 is listenable at 96 kbps. Its target audience is most likely to be big-scale broadcasters and tv companies because it compares wm9 to mpeg2 at broadcast bitrates instead of saying something like "mpeg-4 quality at half bitrate".
This page might give even some correct information because most of their claims are believable even when thinking mpeg-4.
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