3 ms·

What do you mean by a codebook? Something like a static dictionary?

• PeCaN 11y ago
  For LZ algorithms, the dictionary made when compressing the first version would be reused for subsequent "versions" of the same document. So sort of a static dictionary, but specialized for what you're sending. That or maybe he means the Huffman codes, in which case you'd do the same thing but s/LZ/Huffman/ s/dictionary/tree/g. I tend to favor algorithms like LZF and LZ4 that don't have a separate dictionary for compressing text though, since there's just about no performance loss on either end and compression is "good enough".
  • robryk 11y ago
    > For LZ algorithms, the dictionary made when compressing the first version would be reused for subsequent "versions" of the same document. So sort of a static dictionary, but specialized for what you're sending. Ah, so you mean something like what SDCH does. This works well for files that are smaller than the window size and has rewards rapidly diminishing with filesize past that.