TY - GEN
T1 - A novel macro-block group based AVS coding scheme for many-core processor
AU - Wang, Zhenyu
AU - Liang, Luhong
AU - Zhang, Xianguo
AU - Sun, Jun
AU - Zhao, Debin
AU - Gao, Wen
PY - 2009
Y1 - 2009
N2 - The slice-level parallelism is popular in parallel video coding. However, the quality loses greatly because the dependency between macro-blocks is broken, especially on many-core platforms. To address this problem, a novel Macro-Block Group (MBG) decomposition scheme is presented for parallel AVS coding. In the proposed scheme, video frames are equally divided into rectangular MBG regions, each consists of more rows and less columns than the slice-level scheme. Since MBG is not supported by AVS, a vertical partitioning scheme is introduced, and the mode confining and MVD adjusting techniques are utilized to keep consistency with the standard. In practice, our parallel encoder is developed on the TILE64 platform, where P/B frames use the MBG-level parallelism and I frames use the macro-block-level parallelism. Experiments show that the proposed scheme can achieve a reduction of 52% (IPPP) and 41% (IBBP) in quality loss while keeping the same speed-up compared with the slice-level parallelism.
AB - The slice-level parallelism is popular in parallel video coding. However, the quality loses greatly because the dependency between macro-blocks is broken, especially on many-core platforms. To address this problem, a novel Macro-Block Group (MBG) decomposition scheme is presented for parallel AVS coding. In the proposed scheme, video frames are equally divided into rectangular MBG regions, each consists of more rows and less columns than the slice-level scheme. Since MBG is not supported by AVS, a vertical partitioning scheme is introduced, and the mode confining and MVD adjusting techniques are utilized to keep consistency with the standard. In practice, our parallel encoder is developed on the TILE64 platform, where P/B frames use the MBG-level parallelism and I frames use the macro-block-level parallelism. Experiments show that the proposed scheme can achieve a reduction of 52% (IPPP) and 41% (IBBP) in quality loss while keeping the same speed-up compared with the slice-level parallelism.
KW - Macro-block group
KW - Many-core processor
KW - Parallel video encoding
UR - https://www.scopus.com/pages/publications/76249121778
U2 - 10.1007/978-3-642-10467-1_31
DO - 10.1007/978-3-642-10467-1_31
M3 - 会议稿件
AN - SCOPUS:76249121778
SN - 3642104665
SN - 9783642104664
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 356
EP - 367
BT - Advances in Multimedia Information Processing - PCM 2009 - 10th Pacific Rim Conference on Multimedia, Proceedings
T2 - 10th Pacific Rim Conference on Multimedia, PCM 2009
Y2 - 15 December 2009 through 18 December 2009
ER -