But you still apply Huffman coding to the bytes after filtering. I think this is true even when using 16 bits per sample, but i'm not sure. From what i rememb

But you still apply Huffman coding to the bytes after filtering. I think this is true even when using 16 bits per sample, but i'm not sure. From what i remember, in gzip, Huffman coding is applied to the offsets of repeated blocks, which are not single bytes.