Re: Blu-ray Dolby Digital vs HS. DDplus...
Sorry, I should clarify. Yes LPCM is lossless. TrueHD has the capability of up to 18Mbps. That is because TrueHD can support more than 8 channels of audio (not that anything is at the level). But technically speaking I believe you could fully represent a 10.2 mix with TrueHD. So, yes LPCM is all you need for a 5.1 mix.
DTS on DVD is a bit confusing. According to DTS, full bitrate if 1509kbps and is scalable to 1344, 1152, 960 or 768. If DTS full bitrate is 1.5Mbps then speaking in terms of binary conversion (1MB = 1,024Kb) then full bitrate for DTS should be 1536kbps, hence why 768kbps is half-bitrate. DTS has no mention of 754kbps, as it is an odd conversion rate. So either DTS miscalculated and 1509 should be 1536 or full-bitrate is not quite 1.5Mbps. I know, trival, but still, it would be nice if there was some standard for it.