Re: Are CODECs used by Blu-ray and HD-DVD owned by Microsoft?



The orginal Blu-Ray hardware and disks are MPEG2, same as old DVDs. This is
because Sony has a bunch of patents related to it and they care more about
royalty payments than quality and were hopeing the 25G disks would allow
enough bitrate to cover the quality difference. It doesn't work because
MPEG2 has artifacts that simply can't be removed with more bitrate, but are
a side effect of how it works at the fundamental level (blocking, edge ring,
colour distortion, etc) As big TVs have become more common, these artifacts
have become too noticable to people actually buying 1080p TVs.

This is not true - the artifacts are removed with more bitrates and
you will see MPEG-2 continued to be used for some titles. Sony's
Gothika, which should be announced in a few weeks, will use MPEG-2 and
have an avergae bit rate of 30 Mbps.

There have been plenty of reference titles on Blu-ray using MPEG-2.
The fact is that AVC/MPEG-4 and VC-1 are both more effecient. However
you can see with high bit rate titles like Pirates of the Caribbean,
which uses an average AVC/MPEG-4 bit rate that's as high as the total
bandwidth for HD DVD, 35 Mbps, that these codecs too can benefit from
higher bit rates.

The fault with The Fifth Element was not the video codec, it was the
original transfer not being cleaned up. The new one will be AVC/MPEG-4
because Sony's AVC encoder is now much more efficient than it was. By
the time Casino Royale came out it had gone from 12x real time to 8x
real time.

.

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