Neurapack

Realtime lossless compressor for the Neuralink Compression Challenge data.

The current C codec is sample-streaming and uses:

quantize -> delta -> 8-tap LMS residual -> previous-block Huffman tree

Build

cd ccodec
./build.sh

Evaluate

Place data.zip next to eval.sh, encode, and decode, then run:

./eval.sh

Results

Using the original Neuralink eval.sh scoring method, which includes encode and decode binary sizes:

Original size (bytes): 146800526
Audio compressed size (bytes): 42812784
Binary size (bytes): 41232
Compressed size (bytes): 42854016
Compression ratio: 3.425595

License

MIT.