International organisation for standardisation

6.8Motion Vector Coding (33)

6.8.1Decoder-side estimation

6.8.1.1.1.1.1.1.1JCTVC-F500 Report of self-derivation of motion estimation techniques at video decoder side on HM3.0 [Y. Chiu, W. Zhang, L. Xu, H. Jiang (Intel)]

This contribution provides test result for the Self Derivation of Motion Estimation (SDME) techniques on HM 3.0 reference software. Test results of skip-mode only rounded-candidate based SDME has been provided for bi-prediction mode at prior JCT-VC meetings, and this test on HM3.0 continues to confine the candidate motion vectors within a predefined range in order to quantize the impact of the memory access bandwidth in checking multiple candidate motion vectors.

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  The test results of Skip-mode only rounded-candidate based SDME with 8-point MV refinement have reported that an overall 1.2% BD bitrate reduction (up to 2.5%) for RA/HE category under the common test conditions with an overall 5% encoding time increase and an overall 13% decoding time increase.
  
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  The test results of Skip-mode rounded-candidate based SDME without MV refinement have reported an overall 0.5% BD bitrate reduction (up to 1.3%) for the test of RA/HE category with an overall 2% increase in encoding time and approximately no increase in decoding time.
  

The decoder complexity increase (and memory bandwidth increase) continues to be a serious concern.

6.8.1.1.1.1.1.1.2JCTVC-F724 Cross-check for JCTVC-F500 [M. Yang (Huawei)] [late reg. 07-12, upload 07-14]

6.8.1.1.1.1.1.1.3JCTVC-F735 Cross-check of Intel’s proposal (JCTVC-F500) on self-derivation of motion estimation at decoder side [K. Sugimoto, A. Minezawa, S. Sekiguchi (Mitsubishi)] [late reg. 07-14, upload 07-16]

The software and algorithm was studied as well as run, and were reported to match the description.