TY - GEN
T1 - A videoconferencing-oriented hybrid-domain H.264/SVC to H.264/AVC spatial transcoder
AU - Sun, Lei
AU - Liu, Zhenyu
AU - Ikenaga, Takeshi
PY - 2012/12/27
Y1 - 2012/12/27
N2 - As an extension of H.264/AVC, Scalable Video Coding (SVC) provides the ability to adapt to heterogeneous requirements. However, transcoding between SVC and AVC becomes necessary due to the existence of legacy AVC-based systems. The straightforward full re-encoding method requires great computational cost, and fast SVC-to-AVC spatial transcoding techniques have not been thoroughly investigated yet. This paper proposes a low-complexity SVC-to-AVC spatial transcoder in hybrid domain (pixel domain & transform domain) with drift compensation. In the pixel-domain transcoding, a fast re-encoding method is proposed based on mode mapping and MV refinement. In the transform-domain transcoding, the quantized transform coefficients together with motion data are reused directly to avoid re-quantization loss. At last, the drift problem in proposed transcoder is solved. Simulation results show that proposed transcoder achieves averagely 96.4% time reduction compared with the full re-encoding method, and outperforms the reference methods in coding efficiency.
AB - As an extension of H.264/AVC, Scalable Video Coding (SVC) provides the ability to adapt to heterogeneous requirements. However, transcoding between SVC and AVC becomes necessary due to the existence of legacy AVC-based systems. The straightforward full re-encoding method requires great computational cost, and fast SVC-to-AVC spatial transcoding techniques have not been thoroughly investigated yet. This paper proposes a low-complexity SVC-to-AVC spatial transcoder in hybrid domain (pixel domain & transform domain) with drift compensation. In the pixel-domain transcoding, a fast re-encoding method is proposed based on mode mapping and MV refinement. In the transform-domain transcoding, the quantized transform coefficients together with motion data are reused directly to avoid re-quantization loss. At last, the drift problem in proposed transcoder is solved. Simulation results show that proposed transcoder achieves averagely 96.4% time reduction compared with the full re-encoding method, and outperforms the reference methods in coding efficiency.
KW - SVC-to-AVC transcoding
KW - drift compensation
KW - hybrid-domain
KW - spatial scalability
KW - videoconferencing
UR - http://www.scopus.com/inward/record.url?scp=84871461569&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84871461569&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-34778-8_12
DO - 10.1007/978-3-642-34778-8_12
M3 - Conference contribution
AN - SCOPUS:84871461569
SN - 9783642347771
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 129
EP - 141
BT - Advances in Multimedia Information Processing, PCM 2012 - 13th Pacific-Rim Conference on Multimedia, Proceedings
T2 - 13th Pacific-Rim Conference on Multimedia, PCM 2012
Y2 - 4 December 2012 through 6 December 2012
ER -