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Old 20th May 2007, 13:18   #51  |  Link
zgx
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Join Date: Feb 2007
Posts: 94
Quote:
Originally Posted by mikeyakame View Post
this is the info for The Matrix TrueHD track.

Audio attribute :
Audio application mode : surround
Audio format : MLP
Sampling frequency : 48000
Sampling quantization : 24
Number of audio channels : 6
Number of audio streams : 8
Bitrate: 2544 Kbps

I get both 24-bit outputs with this track on Nero Showtime & PowerDVD 7.3.2911
The Matrix TrueHD soundtrack is "1 682 946 322" bytes long. The movie is 136 minutes long. That gives it a bitrate of 1611 Kbps. That's about the same bitrate as a 6 channel 16/48 movie soundtrack compressed to FLAC.

Uncompressed 16 bit/48 kHz/6 channel PCM: 4500 Kbps
Uncompressed 24 bit/48 kHz/6 channel PCM: 6750 Kbps

It's hard to say but I do not believe it's possible to losslessly compress a 24/48 soundtrack from an action movie like The Matrix to 1611 Kbps and the way I see it they must have used a 16/48 source.


People here say that the least significant 8 bits are not zero as they should be. Is it possible that even if the TrueHD track is stored with the least significant 8 bits as zeros that the Nero Audio Decoder reads the 16 bit most significant bits and upsample them to 24 bit?
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