Hi.. gurus!!

I think wavelet coding is some kind of subband coding.

Is it right?

Hi.. gurus!!

I think wavelet coding is some kind of subband coding.

Is it right?

1. subband (wavelets) : coding the top & bottom plane?

Are there any clever tricks for handling the first

and last planes of subband (such as wavelet, or

tree-structured DCT) data?

The problem is that these planes are different than

all others, in that the first has no parents, and

the last has no children, so that one cannot blindly

apply the same coding scheme to all levels.

If we code bitplanes in quartets of bits (each quartet

is the four children of some parent), then the usual

technique is to turn the top plane's quartets into a

singlet and 3 "children". The singlet is coded by

some DPCM or something plain; this then has the problem

that the 3 children are not four - they must be coded

differently than the main data. This means that they

cannot share statistics with the main data, a problem

especially for adaptive arithmetic coding.

Tips?

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http://www.cco.caltech.edu/~bloom/

2. Source Code

3. Q: what _is_ a subband in wavelet transform?

7. Ask for Source code/routines for Subband Coding or wavelet transform!

8. wavelet subband vector quantization - problems...

9. difference between Corba & message oriented & transaction

10. 중국관련 검색엔진

11. Komprimierung durch Wavelets / Compression through Wavelets

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