Back to Search Document details
12th Meeting: Macao, October 2018 2018-10-01 18:16
CE10.2.1: OBMC
Authors: Z.-Y. Lin MediaTek CHUN-CHI CHEN MediaTek T.-D. Chuang MediaTek C.-Y. Chen MediaTek C.-W. Hsu MediaTek Y.-W. Huang MediaTek Shawmin Lei MediaTek
Abstract
This contribution presents proposed complexity reduction methods for overlapped block motion compensation (OBMC). To reduce computational complexity, lossless data reuse, coding unit (CU) boundary only OBMC, removal of OBMC syntax, and disabling OBMC for small and large CUs are proposed. To remove all the additional motion compensation (MC) bandwidth, replacing additional reference samples required by the JEM OBMC with padded reference samples is proposed. To save the line buffer requirement, decreasing the number of blended lines from 4 to 2 at CTU row boundaries is proposed. To allow parallel processing for top and left boundaries of a CU, a parallel blending method is proposed. It is reported that OBMC with all the proposed complexity reduction methods results in -0.82% and -1.17% luma BD-rates with 2% and 3% encoding time increases and 8% and 9% decoding time increases for VTM2.0.1-RA and VTM2.0.1-LB, respectively.
Meeting Notes
JVET-L0101 CE10.2.1: OBMC [Z.-Y. Lin, C.-C. Chen, T.-D. Chuang, C.-Y. Chen, C.-W. Hsu, Y.-W. Huang, S.-M. Lei (MediaTek)]
References:
JVET-K0258 JVET-K0259 JVET-K1010
Cited:
JVET-AA2025 JVET-L0030 JVET-M0178 JVET-M0179 JVET-U0100 JVET-U2024 JVET-V0024 JVET-V0086 JVET-V0120 JVET-W0102 JVET-W2025 JVET-X2025 JVET-Y0076 JVET-Y2025 JVET-Z0061 JVET-Z2025
ARCHIVE v2 :
JVET-L0101-v1.docx JVET-L0101_Presentation.pdf JVET-L0101_Results_Table1.xlsm JVET-L0101_Results_Table2.xlsm JVET-L0101_Results_Table3.xlsm JVET-L0101_Results_Table4.xlsm JVET-L0101_Results_Table5.xlsm
Decisions
JVET-L0101 CE10.2.1: OBMC [Z.-Y. Lin, C.-C. Chen, T.-D. Chuang, C.-Y. Chen, C.-W. Hsu, Y.-W. Huang, S.-M. Lei (MediaTek)]
Citation