TY - GEN
T1 - MPEG-2 to H.264/AVC intra frame transcoding
AU - Wu, Jyun De
AU - Lin, Yinyi
N1 - Funding Information:
This work was supported by the National Science Council, R.O.C. under Grant Number NSC 96-2221-E-008-013-MY2.
PY - 2009
Y1 - 2009
N2 - The newest international video-coding standard H.264/AVC significantly achieves better coding performance compared to prior video coding standards such as MPEG-2, which has been widely used in today's digital video applications. To provide the interoperability between MPEG-2 and H.264/AVC, in this paper we propose an efficient cascaded mode decision for MPEG-2 to H.264/AVC intra frame transcoding, which is accomplished in two stages. In the first stage, the low-frequency AC components of DCT block of a MB is used to select I4MB or I16MB mode prediction; while in the second stage SATD coefficients, including SATD value and its variance, is used to skip improper modes for RDO mode decision. The experimental results, conducted on JM12.2 with fast C8MB mode decision, reveal that over 49% of computation time on average can be saved, while preserving good coding performance when compared with complex cascaded pixel domain transcoding (CCPDT); or 85% (a speed up factor of 7) when compared with CCPDT without considering fast C8MB. The coding performance is also compared with two other distinct algorithms [3], [4], and the results demonstrate that the proposed algorithm momentously outperforms these two algorithms in all three respects (PSNR, bit rate as well as computation time).
AB - The newest international video-coding standard H.264/AVC significantly achieves better coding performance compared to prior video coding standards such as MPEG-2, which has been widely used in today's digital video applications. To provide the interoperability between MPEG-2 and H.264/AVC, in this paper we propose an efficient cascaded mode decision for MPEG-2 to H.264/AVC intra frame transcoding, which is accomplished in two stages. In the first stage, the low-frequency AC components of DCT block of a MB is used to select I4MB or I16MB mode prediction; while in the second stage SATD coefficients, including SATD value and its variance, is used to skip improper modes for RDO mode decision. The experimental results, conducted on JM12.2 with fast C8MB mode decision, reveal that over 49% of computation time on average can be saved, while preserving good coding performance when compared with complex cascaded pixel domain transcoding (CCPDT); or 85% (a speed up factor of 7) when compared with CCPDT without considering fast C8MB. The coding performance is also compared with two other distinct algorithms [3], [4], and the results demonstrate that the proposed algorithm momentously outperforms these two algorithms in all three respects (PSNR, bit rate as well as computation time).
KW - H.264/AVC
KW - Intra mode decision
KW - Rate distortion optimization (RDO)
KW - Rate-distortion cost function
KW - ρ-domain model
UR - http://www.scopus.com/inward/record.url?scp=76249126480&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-10467-1_98
DO - 10.1007/978-3-642-10467-1_98
M3 - 會議論文篇章
AN - SCOPUS:76249126480
SN - 3642104665
SN - 9783642104664
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 1018
EP - 1029
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 -