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#summary High Quality DXT Compression Techniques
Charles Bloom provides [http://cbloomrants.blogspot.com/2009/06/06-17-09-dxtc-more-followup.html a summary of some of this techniques].
=== YCoCg-DXT5 ===
A simple way of obtaining higher quality compression is also using the YCoCg color space, but encoding the Y component in the in the alpha channel of a DXT5 block, and the !CoCg components in the RGB channels. That was originally suggested by Waveren in [http://www.intel.com/cd/ids/developer/asmo-na/eng/dc/index.htm Real-Time DXT Compression]. This approach was described in more detail by Waveren and Castano in [http://developer.nvidia.com/object/real-time-ycocg-dxt-compression.html Real-Time YCoCg-DXT Compression].