'So, when you are talking about soundtracks on an HD DVD, the following are all possibilities:
16bit/48khz lossy (common, used by Warner often with DD+ at 640kbps bitrate)
16bit/48khz lossless (common, used by Warner often with TrueHD at 1.5mbps bitrate)
20bit/48khz lossy (common, used by Paramount with DTS-HD at 1.5mbps bitrate)
24bit/48khz lossy (common, used by Universal often with DD+ at 1.5mbps bitrate)
24bit/48khz lossless (less common, used by Universal with TrueHD at 2.8mbps bitrate)
24bit/96khz lossy (rare, used only by RnB Films on the HD DVD Chronos'
You know I keep having to remind myself that the bitrate is just a measure of the codecs compression