A real-time facial video coding/decoding system was proposed based on the establishment of 2D/3D mixed coding/decoding scheme. It has better rate/distortion performance at ultra-low bit-rate. Multi-measurements and on...
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A real-time facial video coding/decoding system was proposed based on the establishment of 2D/3D mixed coding/decoding scheme. It has better rate/distortion performance at ultra-low bit-rate. Multi-measurements and online appearance models were applied to track the 3D facial motion from video by the improved particle filtering. 3D facial animation was produced by combining the parameterized model and muscular model. 3D hair was synthesized based on the hair detection result in video. 3D coding/decoding result of foreground and 2D coding/decoding result of background were stitched seamlessly. At ultra-low bit-rate, the objective experiment confirmed the comprehensive advantage between coding efficiency and decoding quality of this system, and the subjective experiment indicated the suitability of subjective face identification by it.
videocoding systems includes motion compensation, frequency transformation, quantization, and lossless or entropy coding. For applications like, video playback, the time complexity of the decoder is an important issu...
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ISBN:
(纸本)9783642135767
videocoding systems includes motion compensation, frequency transformation, quantization, and lossless or entropy coding. For applications like, video playback, the time complexity of the decoder is an important issue. Motion estimation (ME) is the most time constraint modules of videocoding technique, and the frequency transformation/inverse transformation also consume a considerable amount of time. For real-time application, decoder has to be fast enough to reconstruct the frames from transmitted data;but the most time constraint module of the decoder is the inverse transformation. In this paper, a fast motion estimation algorithm is used and in residual frame coding purpose, a fast method based on block truncation coding with pattern fitting concept is employed. Proposed videocoding method is a fast one with a good quality at the reasonable bit-rate, also the decoder is much faster.
The explosive growth of portable video applications has elevated needs for low-energy video processing hardware. This paper presents algorithmic and architectural techniques capable of reducing the energy dissipation ...
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ISBN:
(纸本)9781424407842
The explosive growth of portable video applications has elevated needs for low-energy video processing hardware. This paper presents algorithmic and architectural techniques capable of reducing the energy dissipation of video codec considerably. The focus is put on adaptive approaches, which dynamically adjust the number of operations, the operational bit-width, and voltage supply to varying picture content. We describe the strengths of techniques in terms of energy savings and design complexity and overview issues of their practical use.
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