alt Hacker NewsAV1 supports YCoCg, which encodes RGB losslessly.
It is a bit-reversible rotation of the RGB cube. It makes the channels look more like luma and chroma that the codec expects.
AV1 supports YCoCg, which encodes RGB losslessly.
It is a bit-reversible rotation of the RGB cube. It makes the channels look more like luma and chroma that the codec expects.
False.
8-bit YCoCg (even when using the reversible YCoCg-R [1] scheme) cannot represent 8-bit RGB losslessly. The chroma channels would need 9 bits of precision to losslessly recover the original 8-bit RGB values.
[1] https://www.microsoft.com/en-us/research/wp-content/uploads/...