Low-complexity transcoding of inter coded video frames from H.264 to H.263

Conference contribution
(Conference Contribution)


Publication Details

Author(s): Bialkowski J, Barkowsky M, Leschka F, Kaup A
Publisher: IEEE
Publication year: 2006
Pages range: 837-840
ISBN: 9781424404810
ISSN: 1522-4880
Language: English


Abstract


The presented work addresses the reduction of computational complexity for transcoding of interframes from H.264 to H.263 baseline profiles maintaining the quality of a full search approach. This scenario aims to achieve fast backward compatible interoperability inbetween new and existing video coding platforms, e.g. between DVB-H and UMTS. By exploiting side information of the H.264 input bitstream the encoding complexity of the motion estimation is strongly reduced. Due to the possibility to divide a macroblock (MB) into partitions with different motion vectors (MV), one single MV has to be selected for H.263. It will be shown, that this vector is suboptimal for all sequences, even if all existing MVs of a MB of H.264 are compared as candidate. Also motion vector refinement with a fixed 1/2-pel refinement window as used by transcoders throughout the literature is not sufficient for scenes with fast movement. We propose an algorithm for selecting a suitable vector candidate from the input bitstream and this MV is then refined using an adaptive window. Using this technique, the complexity is still low at nearly optimum rate-distortion results compared to an exhaustive full-search approach. ©2006 IEEE.


FAU Authors / FAU Editors

Kaup, André Prof. Dr.-Ing.
Lehrstuhl für Multimediakommunikation und Signalverarbeitung


How to cite

APA:
Bialkowski, J., Barkowsky, M., Leschka, F., & Kaup, A. (2006). Low-complexity transcoding of inter coded video frames from H.264 to H.263. In Proceedings of the 2006 IEEE International Conference on Image Processing, ICIP 2006 (pp. 837-840). Atlanta, GA, US: IEEE.

MLA:
Bialkowski, Jens, et al. "Low-complexity transcoding of inter coded video frames from H.264 to H.263." Proceedings of the 2006 IEEE International Conference on Image Processing, ICIP 2006, Atlanta, GA IEEE, 2006. 837-840.

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Last updated on 2019-31-05 at 17:53