Is Warner changing to DTS-HD Master Audio too?

[BIslander]

Originally Posted by BozQ

Dolby TrueHD is a full quality track on its own, unlike DTS-HD which uses a Core+Extension form of compression. So that would explain the differences in file sizes.

Dolby also uses a core + extension approach with TrueHD. But, the core is lossless stereo rather than the lossy 5.1 that DTS uses. TrueHD does not contain a "full quality" lossless 5.1 track of its own.

The original 5.1 track is downmixed to stereo, which is placed in the TrueHD package as the core. Extension A includes the data needed to convert the two channel mix back into the original 5.1. Extension B is used for 7.1 to add the data for the rear channels.

The TrueHD package may also have a separate stereo mix that is not produced by downmixing. And, on Blu, it includes a separate lossy DD 5.1 track for backwards compatibility.