A fast H.263 to H.264 inter-frame transcoder with motion vector refinement

Conference contribution
(Conference Contribution)

Publication Details

Author(s): Bialkowski J, Menden M, Barkowsky M, Kaup A
Publication year: 2004
Pages range: 47-52


Video transcoding techniques supply interoperability of a great variety of devices that can be connected by various communication networks with different data rate requirements. Particularly inhomogeneous video transcoding is the conversion of an existing video bitstream from one standard into a bitstream of another standard, for example the conversion from H.263 data into H.264 data. It may also include parameter adaptations such as bitrate or frame rate reduction. In this work, we present a low-complexity transcoder design for transcoding Interframe macroblocks from H.263 to H.264. The large complexity reduction comes from reusing motion vectors of the input bitstream and from the fact that only a subset of all possible H.264 coding parameters is used. The selection of these parameters is based on statistical investigations of encoded H.264 parameters from a full parameter search on decoded H.263 sequences. Our approach leads to small rate-distortion losses compared to the full parameter encoder below 0.5 dB at comparable data rates, but the computational complexity reduction is over 98% for finding a suitable macroblock decision. Compared to simply copying the motion vectors without post-processing, the rate-distortion gain of our approach is up to 2 dB at equivalent rate.

FAU Authors / FAU Editors

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

How to cite

Bialkowski, J., Menden, M., Barkowsky, M., & Kaup, A. (2004). A fast H.263 to H.264 inter-frame transcoder with motion vector refinement. (pp. 47-52). San Francisco, CA, US.

Bialkowski, Jens, et al. "A fast H.263 to H.264 inter-frame transcoder with motion vector refinement." Proceedings of the Picture Coding Symposium 2004, San Francisco, CA 2004. 47-52.


Last updated on 2018-10-08 at 09:11