báo cáo hóa học:" Research Article Parity Bit Replenishment for JPEG 2000-Based Video Streaming"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài:Research Article Parity Bit Replenishment for JPEG 2000-Based Video Streaming | Hindawi Publishing Corporation EURASIP Journal on Image and Video Processing Volume 2009 Article ID 683820 18 pages doi 2009 683820 Research Article Parity Bit Replenishment for JPEG 2000-Based Video Streaming Francois-Olivier Devaux and Christophe De Vleeschouwer Communications and Remote Sensing Laboratory TELE Universite Catholique de Louvain 1348 Louvain-la-Neuve Belgium Correspondence should be addressed to Francois-Olivier Devaux Received 7 May 2008 Revised 22 October 2008 Accepted 1 June 2009 Recommended by Wen Gao This paper envisions coding with side information to design a highly scalable video codec. To achieve fine-grained scalability in terms of resolution quality and spatial access as well as temporal access to individual frames the JPEG 2000 coding algorithm has been considered as the reference algorithm to encode INTRA information and coding with side information has been envisioned to refresh the blocks that change between two consecutive images of a video sequence. One advantage of coding with side information compared to conventional closed-loop hybrid video coding schemes lies in the fact that parity bits are designed to correct stochastic errors and not to encode deterministic prediction errors. This enables the codec to support some desynchronization between the encoder and the decoder which is particularly helpful to adapt on the fly pre-encoded content to fluctuating network resources and or user preferences in terms of regions of interest. Regarding the coding scheme itself to preserve both quality scalability and compliance to the JPEG 2000 wavelet representation a particular attention has been devoted to the definition of a practical coding framework able to exploit not only the temporal but also spatial correlation among wavelet subbands coefficients while computing the parity bits on subsets of wavelet bit-planes. Simulations have shown that compared to pure INTRA-based conditional replenishment solutions .

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