IEEE Trans Image Process - Wyner-Ziv video coding with classified correlation noise estimation and key frame coding mode selection.

Tópicos

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Resumo

We improve the overall rate-distortion performance of distributed video coding by efficient techniques of correlation noise estimation and key frame encoding. In existing transform-domain Wyner-Ziv video coding methods, blocks within a frame are treated uniformly to estimate the correlation noise even though the success of generating side information is different for each block. We propose a method to estimate the correlation noise by differentiating blocks within a frame based on the accuracy of the side information. Simulation results show up to 2 dB improvement over conventional methods without increasing encoder complexity. Also, in traditional Wyner-Ziv video coding, the intercorrelation of key frames is not exploited since they are simply intracoded. In this paper, we propose a frequency band coding mode selection for key frames to exploit similarities between adjacent key frames at the decoder. Simulation results show significant improvement especially for low-motion and high frame rate sequences. Furthermore, the advantage of applying both schemes in a hierarchical order is investigated. This method achieves additional improvement.

Resumo Limpo

improv overal ratedistort perform distribut video code effici techniqu correl nois estim key frame encod exist transformdomain wynerziv video code method block within frame treat uniform estim correl nois even though success generat side inform differ block propos method estim correl nois differenti block within frame base accuraci side inform simul result show db improv convent method without increas encod complex also tradit wynerziv video code intercorrel key frame exploit sinc simpli intracod paper propos frequenc band code mode select key frame exploit similar adjac key frame decod simul result show signific improv especi lowmot high frame rate sequenc furthermor advantag appli scheme hierarch order investig method achiev addit improv

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