Quote:
Originally Posted by ClaytonMG
Alright, so upon looking at the bitrate for the Dolby TrueHD track on 300, I noticed it actually drops down to around 1.2mbps in some spots... Which is actually lower than a DTS track and a Dolby Digital-Plus track. How can it do that if it's supposed to be lossless? I'm not saying that it isn't lossless, I just find it interesting and at the same time, it's making me want to stick with PCM's constant 4.6mbps bitrate.
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I assure you it is lossless. It is variable bit rate lossless, in that it only allocated the bits when called on to do so. This is part of what makes both Dts HD MA and Dolby TrueHD more efficient at packing data on the disc.
PCM is constant bit rate in that no matter how many bits are actually needed to code the audio, there will always be more than necessary at any given time, and enough available when needed. Not the most efficient way, but I prefer it because it is widely used, and there are no additional processes to get it to playback other than D/A converters.