[theora-dev] What sort of math i required?
dvdkhlng at gmx.de
Thu Dec 11 07:31:41 PST 2003
>>>>> "Christoph" == Christoph Lampert <chl at math.uni-bonn.de> writes:
> the (main) problem with wavelet based codecs is that wavelets aren't
> localized in the image space, so you cannot just use the very
> successful block-based motion estimation as for all DCT-based codecs.
I actually do not know much about all this but why shouldn't a simple
wavlet-based codec be based on blocks? What I've seen so far was an
example using 8x8 wavlets gained via PCA. Isn't DCT just a special case
of a wavelet transform with the advantage of high speeds due to
symmetries that allow speed optimizations analogous to FFT?
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