IEEE Trans Image Process - Multiple descriptions based on multirate coding for JPEG 2000 and H.264/AVC.

Tópicos

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Resumo

Multiple description coding (MDC) makes use of redundant representations of multimedia data to achieve resiliency. Descriptions should be generated so that the quality obtained when decoding a subset of them only depends on their number and not on the particular received subset. In this paper, we propose a method based on the principle of encoding the source at several rates, and properly blending the data encoded at different rates to generate the descriptions. The aim is to achieve efficient redundancy exploitation, and easy adaptation to different network scenarios by means of fine tuning of the encoder parameters. We apply this principle to both JPEG 2000 images and H.264/AVC video data. We consider as the reference scenario the distribution of contents on application-layer overlays with multiple-tree topology. The experimental results reveal that our method favorably compares with state-of-art MDC techniques.

Resumo Limpo

multipl descript code mdc make use redund represent multimedia data achiev resili descript generat qualiti obtain decod subset depend number particular receiv subset paper propos method base principl encod sourc sever rate proper blend data encod differ rate generat descript aim achiev effici redund exploit easi adapt differ network scenario mean fine tune encod paramet appli principl jpeg imag havc video data consid refer scenario distribut content applicationlay overlay multipletre topolog experiment result reveal method favor compar stateofart mdc techniqu

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