Ninth IEEE International Symposium on Multimedia Workshops (ISMW 2007)
DOI: 10.1109/ism.workshops.2007.78
Ninth IEEE International Symposium on Multimedia Workshops (ISMW 2007)
DOI: 10.1109/ismw.2007.4476007
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電機工程學系 ; been equipped with modern video codecs. Video communications, especially for encoding H.264 format bit-stream, however, are usually very power-consuming, leading to rather limited communication period for mobile devices powered by batteries. Computation-aware video coding can effectively extend the battery life. In this paper, we propose a computation-aware intra mode decision for H.264 coding and transcoding applications. The proposed algorithm optimizes the visual quality by adaptively adjusting the number of prediction modes in mode decision under a given computation constraint. We introduce a new concept of computation buffer and formulate the computation control of mode decision as a rate-distortion optimization problem of computation buffer control. Experimental results show that our proposed algorithm can effectively control the computational complexity while maintaining good RD-performance and satisfying the given computation constraint.