[XviD-devel] Deblocking metrics

[Marco Al]

Christoph Lampert wrote:

> did anyone ever test "deblocking" in DCT domain? Or maybe in image domain,
> but with direct effect on the resulting bitstream (supposed to mean: not
> only in postpressing).

Some people have added noise to prevent blocking, look around the Doom9 boards,
a possible theoretical justification for doing so can be found at
http://www.nd.edu/~lisa/mrobert2/icip2001.pdf

Personally I find the whole thing icky though ... Id rather see the approach
from
http://www-it.et.tudelft.nl/~inald/pubs/Image%20Quality/Adaptive%20spatial%20noi
se%20shaping%20for%20DCT%20based%20image%20compression%201996.pdf

Or possibly the approach from"Spatial shaping: a fully compatible improvement of
DCT coding" which it references. But I cant get a hold of that paper online
(well I  could, but it would cost me a couple of euros :).

Marco