Wednesday, February 17, 2021

Average rate-distortion curves for bc7enc_rdo

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bc7enc_rdo is now a library that's utilized by the command line tool, which is far simpler now. This makes it trivial to call multiple t...
Saturday, February 13, 2021

First RDO LDR ASTC 6x6 encodings

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This is 6x6 block size, using the ERT in bc7enc_rdo: Left=Non-RDO, 37.3 dB, 2.933 bits/texel (Deflate)  Right=RDO lambda=.5, 36.557 dB, 2.39...

First-ever RDO ASTC encodings

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Here are my first-ever RDO LDR ASTC 4x4 encodings. Perhaps they are the first ever for the ASTC texture format:  Non-RDO: 5.951 bits/texel,...
Friday, February 12, 2021

bc7e.ispc integrated into bc7enc_rdo

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bc7e.ispc is a very powerful/fast 8 mode encoder. It supports the entire BC7 format, unlike bc7enc's default encoder. It's 2-3x fas...

Updated bc7enc_rdo with improved smooth block handling

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The command line tool now detects extremely smooth blocks and encodes them with a significantly higher MSE scale factor. It computes a per-b...
Thursday, February 11, 2021

Dirac video codec authors on Rate-Distortion Optimization

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"This description makes RDO sound like a science: in fact it isn't and the reader will be pleased to learn that there is plenty of ...
Wednesday, February 10, 2021

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

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Previous BC7 encoders optimize for maximum quality and entirely ignore (more like externalize) the encoded data they output. Their encoded o...