Richard Geldreich's Blog

Announcing CPNG, "Compatible Network Graphics", a backwards compatible fork of PNG

The claimed rANS decoding advantages are being exaggerated

LZ_XOR/LZ_ADD progress

Somewhere Range Coding went off the rails

Comparing Vectorized Huffman and Range Decoding vs. rANS (Or: rANS entropy coding is overrated)

Vectorized interleaved Range Coding using SSE 4.1

Faster LZ is not the answer to 150-250+ GB video game downloads

The Dark Horse of the Image Codec World: Near-Lossless Image Formats Using Ultra-Fast LZ Codecs

EA/Microsoft Neural Network GPU Texture Compression Patents

Lagrangian RDO PNG

Fast AVX2 PNG writer

LZ_XOR on canterbury corpus

One nice property of highly constrained length limited prefix codes

LZ_XOR on enwik8

Other LZ_XOR variants

LZ_XOR

Lena is Retired

Average rate-distortion curves for bc7enc_rdo

First RDO LDR ASTC 6x6 encodings

First-ever RDO ASTC encodings

bc7e.ispc integrated into bc7enc_rdo

Updated bc7enc_rdo with improved smooth block handling

Dirac video codec authors on Rate-Distortion Optimization

Weighted/biased BC7 encoding for reduced output data entropy (with no slowdowns)

bc7enc_rdo now supports RDO for all BC1-7 texture formats