Ask questions to BD authoring and compression insider "2themax"

[dialog_gvf]

Originally Posted by 2themax

LOA:
- ABR: 24-25Mbps
- PBR: 40Mbps

LOTR EE (ROTK):
- ABR: 18-19Mbps
- PBR: 39Mbps

If you drop each to a single lossless track, it'll jump about 2Mbps on the ABR and the PBR on LOTR would jump to 40Mbps.

Granted, this is all speculation. Each studio may have completely different thoughts on what the disc should contain. For instance, New Line would more than likely do DTS-MA on LOTR. My opinion, LOA is fine as it is and LOTR should be split across 2 BD50s. With that split though, I'd add PIP and 7.1 lossless to the feature.

There is a difference between what COULD be done and what SHOULD be done.

Richard Casey has said he believes the sweet spot is currently between 24-26Mbps ABR for VC-1/AVC. So, LOA would be nicely in today's sweet spot, but ROTK-EE well below it.

Is this a problem? Today, possibly. But how about when ROTK-EE is released? Will the encoders have improved to the point where 18-19Mbps ABR is the sweet spot (beyond which there are serious diminishing returns for increased ABR on the PQ).

This ignores other issues, like the amount of effort needed by the compressionist to deal with segment re-encodes. With a title like LOTR, I think we can assume that whatever effort is reasonable is likely to be justifiable.

Gary