3 ms·
The big difference is that this preprocessing doesn't require a reversal step. JPEG's DCT requires an IDCT (and chroma conversion etc.), which the client needs
by Sesse__ 4y ago
The big difference is that this preprocessing doesn't require a reversal step. JPEG's DCT requires an IDCT (and chroma conversion etc.), which the client needs to understnad and know about, while this merely introduces controlled noise that happens to please LZ compressors.