[opendtv] Re: 625 video quality is good enough....
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Tue, 19 Oct 2004 10:14:14 -0400
At 8:47 AM +0200 10/19/04, jeroen.stessen@xxxxxxxxxxx wrote:
>Lower layers should preferably be transmitted with more
>robustness (like more forward error correction bits), to
>maintain a watchable picture under bad reception conditions
>like mobile, portable, bad weather, interference, etc.
All of these ideas were veted during the U.S. advanced television
process. They were ignored.
>
>My point is: don't write fixed standards with a short list
>of "magic numbers", but write a standard that can grow.
>Then you won't have to abandon it after every few years.
You mean like MPEG-2?
MPEG-2 could care less about the lists of format constraints that
others have imposed upon the standard. Truth is that MPEG-2 is
resolution independent, UP TO the performance limits established by
the LEVELS defined by the standard. MPEG-2 even has all of the
spatial and temporal scalability tools needed to deliver the layered
structure you have described. They have rarely if ever been used.
In a digital world, formats are meaningless. Jeroen is correct, just
create enabling standards and manage their evolution as new
technologies are developed. It seems to be working for the Internet
(e.g. the Internet Engineering Task Force) and the Web (World Wide
Web Consortium), despite efforts by a few companies to control
evolution by propagating proprietary standards.
Regards
Craig
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