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Reader Comments (Page 1 of 1)
bfdtv @ Apr 26th 2007 4:53PM
The primary complaint of LPCM is that it hasn't been used to deliver the full quality of master audio tracks, due to space and bandwidth concerns.
The DTS-HD MA and TrueHD lossless compression formats can deliver full 24/48 master quality audio in about the same bandwidth and space as LPCM at lower 16/48 fidelity.
There's some debate whether LPCM at downconverted 16/48 fidelity is really an improvement over 24/48 DTS @ 1.5Mbps (lossy). In some situations, it may be an improvement, and it others, it may be worse. Providing the full 24/48 audio master does away with such questions, becuase nothing is more faithful to the master than the master itself. Unfortunately, 24/48 LPCM requires more bandwidth than is available with most titles on BD25, and even some BD50 titles with MPEG-2. That's where DTS-HD MA and TrueHD come in; those codecs can losslessly pack the 24/48 LPCM stream, saving significant bandwidth and space.