From Hydrogenaudio Knowledgebase
Snow is a wavelet based video codec being developed by Michael Niedermayer for the ffmpeg project. It's in the early stages of developement and is similiar to 3-D discrete wavelet transform based codecs, like Ogg Tarkin. It can compress both lossy and lossless data.
 Technical information
- 9/7 Compact Biorthogonal Wavelets
- 5/3 Compact Biorthogonal Wavelets
- 13/7 Compact Biorthogonal Wavelets
Snow uses these wavelets similiar to the Daubechies 9/7 Biorthogonal type, including some experimental motion estimation techniques.