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

Bialkowski J, Barkowsky M, Leschka F, Kaup A (2006)


Publication Language: English

Publication Status: Published

Publication Type: Conference contribution, Conference Contribution

Publication year: 2006

Publisher: IEEE

Pages Range: 837-840

Article Number: 4106660

Event location: Atlanta, GA US

ISBN: 9781424404810

DOI: 10.1109/ICIP.2006.312532

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.

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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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