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Joint source-channel decoding (JSCD) exploits residual redundancy in compressed bitstreams to improve the robustness to transmission errors of multimedia coding schemes. This paper proposes an architecture to introduce some additional side information in compressed streams to help JSCD. This architecture exploits a reference decoder already present or introduced at the encoder side. An application...
An approach to scalable multi-view video coding with joint best basis wavelet packets is examined in this paper. A 4-D wavelet transform is used to decorrelate the multi-view video data temporally, view-directionally, and spatially for efficient scalable compression. Motion compensated temporal filtering (MCTF) is used for temporal, and disparity compensated view filtering (DCVF) for view- directional...
This paper models the complexity consumption of entropy decoding in a H.264 decoder, which includes many modes such as fix-length code (FLC), variable-length code (Exp-Golomb code in particular), content-adaptive variable length code (CAVLC) and content-adaptive binary arithmetic code (CABAC). By analyzing the computations involved in different entropy decoding modes, we derive a complexity model...
We propose a distributed source coding system for data collected by sensor networks. It uses a feedback channel between the sensors and the gateway node (i.e., the joint decoder) but, unlike previous systems, the encoding process is driven by the decoder. Compression is performed using distributed arithmetic coding, which is extended to adaptively estimate the source probabilities. Specifically, the...
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