[opendtv] Re: [oldvtrs] So Much for HDTV]
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Fri, 22 Aug 2008 09:44:27 -0400
At 9:21 PM -0400 8/21/08, John Shutt wrote:
----- Original Message ----- From: "Manfredi, Albert E"
<albert.e.manfredi@xxxxxxxxxx>
That's been done already, at least in a first generation product, by
Algolith. And certainly, this sort of solution makes a lot of sense
*given that* we have MPEG-2 deployed now, all over the DTV world.
Algolith makes Broadcast gear, not consumer decoders, and I cannot
find any documentation that their "BAR" Block Artifact Reducer
technology is used in any consumer gear. Their noise reduction
cards that include BAR operate in the SD-SDI and HD-SDI domains,
post MPEG decoding.
What I am referring to should be easily implementable into every
consumer MPEG-2 decoder chipset used in STBs, DVD players, and
Digital Televisions. Fading to Macroblocks should be a thing of the
past.
let's not get cazrried away here. Deblocking is a small bandaid that
only marginally improves the picture if you use simple techniques
like blending the edges. Think of it like looking through a mosaic
shower door; instead of sharp edges on the blocks you get a quilted
appearance because all of the real detail in the image is gone. You
need some motion compensated prediction to add back detail to
significantly improve the picture.
The answer is not band aids. The answer is stop the bit starving!
I never see blocking artifacts in h.264 video from Apple, and the bit
rates are typically much lower than what is available for OTA. But
most of this stuff is 24P and low motion.
Regards
Craig
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