Comment by lesuorac

If you don't do _actually_ every single block then you have Huffman Coding [1].

I imagine if you have a good idea of the data incoming you could probably do a similar encoding scheme where you use 7 bits to point to a ~512 bit blob and the 8th bit means the next 512 couldn't be compressed.

[1]: https://en.wikipedia.org/wiki/Huffman_coding