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2006
IEEE

Off-Line Motion Description for Fast Video Stream Generation in MPEG-4 AVC/H.264

11 years 7 months ago
Off-Line Motion Description for Fast Video Stream Generation in MPEG-4 AVC/H.264
The rate-distortion optimal mode decision as well as motion estimation adopted in H.264 brings a big challenge to realtime encoding and transcoding duo to the high computation complexity. In this paper, we propose a hierarchical motion description model to present the motion data of each macroblock (MB) from coarsely to finely. A preprocessing approach is developed to estimate the motion data for each MB at each quality level with regard to its reference quality, its adjacent MBs and the target bit-rate. The resulting motion data can be coded and stored as metadata in a media file or a stream. Moreover, we propose a method to readily extract the specific motion data from the model for each MB at given bit-rates. Experimental results have shown the effectiveness of our proposed motion description model in terms of coding efficiency as well as fast bit-rate adaptation in comparison with that of H.264.
Yi Wang, Xiaoyan Sun, Feng Wu, Shipeng Li, Houqian
Added 11 Jun 2010
Updated 11 Jun 2010
Type Conference
Year 2006
Where ICMCS
Authors Yi Wang, Xiaoyan Sun, Feng Wu, Shipeng Li, Houqiang Li, Zhengkai Liu
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