Arithmetic Coding Python Packages

torchac

Entropy coding / arithmetic coding for PyTorch

pyjpeg

A pure Python encoder and decoder for the JPEG image format

rgclib

Recursive Group Coding (RGC): fast entropy coder with better compression than AC/Huffman on large alphabets – C lib + Python package

zcode

My own Unicode compression algorithm

subtext-codec

Steganographic data encoding in LLM-generated text via arithmetic coding against the model's own next-token distribution.

arithmetic-compressor

Arithmetic coding library with statistical models like PPM and Context mixing (demonstrating core principles of probabilistic inference, ensemble learning in AI)

yaecl

YAECL: Yet Another Entropy Coding Library for Neural Compression Research, with Arithmetic Coding and Asymmetric Numeral Systems support