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In this paper, we propose a novel Wyner-Ziv coding of video using compressive sensing (CS) without using feedback channel. Firstly, the proposed joint sparse model of inter frames is presented. Then, the CS based Wyner-Ziv (WZ) frame coding method is introduced. In proposed method, WZ frame is coded by block based CS measure, quantization, and entropy coding, with rate-distortion (RD) optimization...
In Wyner-Ziv video coding (WZVC), powerful error correcting codes must be used to achieve high compression efficiency; turbo codes are the most commonly used error correcting codes in WZVC. To improve the turbo coding performance in the context of WZVC, this paper proposes a probability updating technique (PUT) acting as an outer loop of the common turbo decoding operation. Whenever a turbo decoded...
Wyner-Ziv video coding (WZC) exhibits many properties like low-complexity encoding or embedded error resilience. The quality of side information takes an important role in the performance of WZC. In order to improve the performance of WZC, a new side information interpolation algorithm is proposed in this paper. In our approach, adjacent frames are recombined before encoding. At the decoder, side...
Wyner-Ziv (WZ) coding of video utilizes simple encoders and highly complex decoders. A transcoder from a WZ codec to a traditional codec can potentially increase the range of applications for WZ codecs. We present a transcoder scheme from the most popular WZ codec architecture to a DPCM/DCT codec. As a proof of concept, we implemented this transcoder using a simple pixel domain WZ codec and the standard...
In this paper we propose a novel method that is motivated by distributed source coding to correct the errors of significant sections in 3D wavelet video streaming. Extra information is generated by Wyner-Ziv codec and is sent to the decoder. While errors occur, the relevant parts in the same frames from EZBC decoder are used as side information to decode the Wyner-Ziv bits to produce a refined replacement...
Distributed video coding (DVC, Wyner-Ziv coding) gained a lot of interest in this research decade. The major application of DVC is low complexity video encoding, which is well investigated in the literature. Generally, a distributed video coding system uses a feedback channel for rate control, otherwise the data send cannot be used for improved reconstruction quality in most cases. The feedback channel...
Current models in Wyner-Ziv video coding consider the temporal correlation noise to be side-information independent (SII). This paper goes beyond this assumption and proposes a novel model, of which the parameters are side-information dependent (SID). The proposed model is experimentally validated showing remarkable accuracy improvement over the conventional SII model. Moreover, a novel SID technique...
In most Wyner-Ziv video coding approaches, the temporal correlation of key frames is not exploited since they are simply intra encoded and decoded. In this paper, using the previously decoded key frame as the side information for the key frame to be decoded, we propose new methods of coding key frames in order to improve the rate distortion performance. These schemes which are based on switching between...
Distributed video coding (DVC) is a new paradigm based on the slepian-wolf and Wyner-Ziv theorems where the temporal redundancy is mainly exploited at the decoder and not anymore at the encoder as in conventional predictive video coding. One of the most popular Wyner-Ziv video coding architectures, the stanford architecture, splits the video frames into two types of frames: key frames and Wyner-Ziv...
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