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CE10-related: On enhancement of 4-tap interpolation filters
Abstract
In this contribution, new filter coefficients proposed to improve performance of Intra interpolation and Inter Chroma prediction. Usage of proposed Smooth 4-tap interpolation filter instead of Gaussian filter for Intra prediction and Sharp 4-tap interpolation filter instead DCT-IF filter for both Intra prediction and for Chroma motion compensation demonstrates the following bit-rate savings: -0.03% (Y), -0.07% (U), -0.04% (V) for AI configurations and -0.03% (Y), -0.07% (U), -0.18% (V) for RA configuration, for Low Delay configurations Chroma gain is even better: 0% (Y), -0.14% (U), -0.42% (V) for LDB and -0.04% (Y), 0.01% (U), -0.49% (V) for LDP with up to -3.4% in Chroma of gain for some sequences. Reducing number of phases for Intra prediction from 32 to 16 leads to following results: -0.01% (Y), -0.04% (U), -0.04% (V) for AI configurations and -0.02% (Y), -0.10% (U), -0.19% (V) for RA configuration. There are no influence on encoding decoding time for both cases. There are no SW modification required apart from filter coefficients replacement.
JVET-M0424 CE10-related: On enhancement of 4-tap interpolation filters [M. Sychev, J. Chen (Huawei)] [late]
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