-
Zoe Liu authored
For both low delay and high delay scenarios, the reference pair in skip mode are specified as the closest fwd ref, together with the closest bwd ref if there is any bwd ref, otherwise with the two closest fwd refs. Skip mode by default uses COMPOUND_AVERAGE. When all the reference frames are on the same side, temporal-distance weighted compound is considered, and a compound index is signaled to indicate whether distance-weighted compound or compound-average is usd. Whether to use distance-weighted compound for skip mode is still under experimenting, hence a flag is temporarily added: SKIP_MODE_WITH_JNT_COMP. Following experimental results are obtained over 30 frames, using the setup of --disable-ext-partition --disable-ext-partition-types --disable-txmg --enable-jnt-comp --enable-mfmv --enable-ext-skip: (1) High Latency: For Google test sets (lowres/midres), the BDRate coding gain is ~0.2%; For AWCY, the coding gain is ~0.1%. (2) Low Latency: No gain has been observed over Google sets and ~0.1% gain is obtained only when temporal-distance weighted prediction is used. Change-Id: I8c433357adebed0126ebfdd5c4d51aa71e64be57
104d62e1