[theora-dev] What sort of math i required?

Timothy B. Terriberry tterribe at vt.edu
Fri Dec 12 14:20:43 PST 2003

> The resulting flow fields should be well compressible again with 
> DCT/wavelet techniques. Has this been tried, does anybody knows research 
> results about this?

IIRC, this was not only tried several years ago, but patented by MS (the 
wavelet approach). This may not be the best approach, however, because 
these are lossy techniques applied to a lossless coding problem. You 
can't just throw away bits of your motion vectors like you can your 
residual data, because even a small change can introduce a large amount 
of error (consider a checkerboard or striped pattern).

--- >8 ----
List archives:  http://www.xiph.org/archives/
Ogg project homepage: http://www.xiph.org/ogg/
To unsubscribe from this list, send a message to 'theora-dev-request at xiph.org'
containing only the word 'unsubscribe' in the body.  No subject is needed.
Unsubscribe messages sent to the list will be ignored/filtered.

More information about the Theora-dev mailing list