[opendtv] Re: 20040921 Twang's Tuesday Tribune (Mark's Monday Memo)
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Sun, 26 Sep 2004 14:28:28 -0400
At 1:18 PM -0400 9/26/04, Tom Barry wrote:
>Under current practices I would probably not be missing any extra detail
>with 1440i. What I would be missing under 1440i would be the extra bit
>overhead of coding 1920x1080i even when there is little underlying
>source detail. That extra does not come for free under MPEG-2. No
>matter how quantized or soft it is there is still some fixed overhead of
>larger resolutions and that takes away from my bit budget to represent
>the real detail that could actually be there to describe the picture.
>
>So unless they (whoever they are) anticipate starting to use some more
>detailed material 1920 just seems wasteful to me.
Hmmmmmm...
Maybe there's a product hiding in here somewhere.
Imagine an algorithm that looks at average spectral content, then
decides on the best "envelope" to stuff the content into to maximize
coding efficiency. Obviously there would be some overlapping
variables; you might get similar results at different raster sizes.
Forcing the use of a few containers with inherently scalable coding
systems like MPEG makes little sense.
Regards
Craig
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