storage of sparse matrix (via diff coding and entropy coding)

[Oron12345]

Hi all,

i'm developing a compression algorithm that

involves storage of sparse matrix,

currently the location information is the hardest to compress

I'm using right now CCS (CRS) and the do some difference coding

and entropy coding on the row_ind/ col_ptr.

those someone know what is the best way to store a sparse matrix,

that doesn't have to support mult/transpose etc...?