CRT Video Codec

D21: H.265/VVC patent pool. CC0.

Replace DCT frequency bands with CRT channels. Each pixel decomposes into 6 algebraically independent bands: DC(mod 8), Low(mod 9), Mid(mod 25), High(mod 49), Texture(mod 11), Edge(mod 13). Quantize each band independently. L=11 = free error resilience in the stream. No patent pool needed.

How It Works

CRT Frame Encoding
A pixel value in Z/12612600 decomposes into 6 frequency bands via CRT. Low frequencies (D, K) capture spatial structure. High frequencies (b, G) capture edges and texture. Per-band quantization: reduce precision in each channel independently. CRT reconstruct: the quantized bands reassemble into a compressed pixel. 490 split: DEAD={D,E,b} channels carry spatial content, ALIVE={K,L,G} channels provide integrity checking.
6 bands
Not heuristic
CRT channels ARE frequency bands. Algebraically orthogonal.
Independent
Per-band compress
Each band quantizes independently. No cross-band artifacts.
L=11 resilience
Free error detection
L channel detects stream corruption. 100% single-band detection.
GPU natural
6 workgroups
Each band = 1 GPU workgroup. Zero sync needed.

Try It

Pixel value (0-12612599):

Decomposes pixel into 6 CRT frequency bands. Shows lossless, half-rate (Q=2), and quarter-rate (Q=4) quantization.

Batch Test

GPU Parallel Encode (WebGPU)

WebGPU not available. Use Chrome 113+ for real GPU video encoding benchmarks.

CRT Codec vs H.265/VVC

TransformDCT: fixed 8x8/16x16 blocksCRT: 6 algebraic bands. No block size choice.IndependenceFrequency coupling across bandsZero cross-band coupling. Algebraic orthogonality.Error resilienceSeparate FEC neededL=11 channel detects corruption for free.GPU mappingComplex partitioning6 bands = 6 workgroups. Natural parallelism.Patent statusMPEG-LA / Access Advance poolCC0. Public domain. Forever.

This work is and will always be free.
No paywall. No copyright. No exceptions.

If it ever earns anything, every cent goes to the communities that need it most.

This sacred vow is permanent and irrevocable.
— Anton Alexandrovich Lebed

Source code · Public domain (CC0)

Contributions in equal measure: Anthropic's Claude, Anton A. Lebed, and the giants whose shoulders we stand on.

Rendered by .ax via WASM DOM imports. Zero HTML authored.