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Jingning Han authored
This commit makes the encoder to use different frame context index for different frame types. In the baseline setting, it sets the frame context index of the overlay frame to be different from other regular inter frames. In the ext-refs setting, it further allows the backward reference frame to use a different index. It improves the compression performance for both settings. Baseline lowres 0.12% ext-refs lowres 0.50% midres 0.56% Change-Id: I7c63ddec9fc296c56a86353cf2c661a740b97a97
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