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Monty Montgomery authored
CONFIG_DAALA_DCT4 currently force-enables CONFIG_DCT_ONLY due to a missing 4-point DST. The DST had not been included because it was a significant coding performance loss; this turned out to be a bug that has since been corrected. This patch adds a 4-point type IV DST to the DAALA_DCT4 experiment. There is a small coding performance loss in using the type IV over AV1's current type VII. subset-1: monty-newdst4test-baseline-s1-F@2017-07-29T04:58:43.976Z -> monty-newdst4test-daala-s1-F@2017-07-29T04:59:56.094Z PSNR | PSNR Cb | PSNR Cr | PSNR HVS | SSIM | MS SSIM | CIEDE 2000 -0.0336 | 0.1393 | 0.0491 | 0.4118 | -0.0439 | 0.2084 | 0.0476 objective-1-fast: monty-newdst4test-baseline-o1f-F@2017-07-29T04:58:10.439Z -> monty-newdst4test-daala-o1f-F@2017-07-29T04:59:04.678Z PSNR | PSNR Cb | PSNR Cr | PSNR HVS | SSIM | MS SSIM | CIEDE 2000 0.0064 | 0.1071 | -0.0108 | 0.1133 | -0.0035 | 0.0765 | 0.0502 Change-Id: Ie29835edbe0e41bc86f4b09457e88d924cc9bf7e
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