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Deb Mukherjee authored
The DST2 is implemented by input alternate sign-flip, followed by DCT, followed by output reversal. Results are roughly the same, but it should be easier to optimize the DST2. [Interestingly a mtrix multuiply implementation is about 0.1% better]. Change-Id: If9ae5fdba87767fb0e6c163a62b77ee66a8d3afc
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