The Wyner-Ziv Rate-Distortion Function of Multivariate Gaussian Sources and Its Application in Distributed Video Coding

2007 ◽  
Author(s):  
Peng Wang ◽  
Jia Wang ◽  
Songyu Yu ◽  
Erkang Chen ◽  
Xiaokang Yang ◽  
...  
Keyword(s):  
Video Coding ◽  
Rate Distortion ◽  
Distributed Video Coding ◽  
Distortion Function ◽  
Multivariate Gaussian ◽  
Gaussian Sources

A Novel Distribution Parameter Fitting Algorithm of Correlation Noise Model for Distributed Video Coding

2014 ◽  
Vol 599-601 ◽  
pp. 1360-1363
Author(s):  
Xiang Yan Liang ◽  
Zhen Hua Tang ◽  
Ya Dan Luo ◽  
Tuan Fa Qin
Keyword(s):  
Video Coding ◽  
Euclidean Distance ◽  
Rate Distortion ◽  
Distributed Video Coding ◽  
Distribution Parameter ◽  
Noise Model ◽  
Correlated Noise ◽  
Minimum Euclidean Distance ◽  
Parameter Fitting ◽  
Fitting Algorithm

In order to improve the accuracy of correlated noise (CN) model for distributed video coding (DVC), this paper proposes a novel distribution parameter fitting algorithm based on the minimum Euclidean distance. The presented method can obtain the final fitted distribution parameter by using the minimum Euclidean distance to compare the Laplace probability density function (PDF) with the PDF computed utilizing the actual residual frame data. Experiment results show that the proposed distribution parameter fitting algorithm can improve the rate-distortion (R-D) performance of DVC significantly.

Residual Wavelet-Domain DVC Using an Optimized TCQ

2011 ◽  
Vol 58-60 ◽  
pp. 2079-2084
Author(s):  
An Hong Wang ◽  
Yi Zheng ◽  
Zhi Hong Li ◽  
Yu Yang Wang
Keyword(s):  
Video Coding ◽  
Rate Distortion ◽  
Low Complexity ◽  
Distributed Video Coding ◽  
Experimental Results ◽  
Wavelet Domain ◽  
Wavelet Coefficients ◽  
Trellis Coded

Nowadays, the rate-distortion performance of distributed video coding (DVC) is not satisfied despite its distinct contribution to low-complexity encoding. This paper presents a new residual DVC using an optimized trellis coded quantization (TCQ) to improve the performance of the current schemes. H.264/AVC intra-frame coding is firstly used to obtain the referenced frame, and then the residual between Wyner-Ziv frame and the referenced frame is Wyner-Ziv encoded with a proposed optimized TCQ which consists of the improved quadtree and the improved TCQ, both considering the characters of wavelet coefficients in different sub-bands. Experimental results show that the proposed scheme outperforms the referenced in rate-distortion performance, and the goal of low-complexity encoding is achieved.

scholarly journals Rate-distortion driven decoder-side bitplane mode decision for distributed video coding

2010 ◽  
Vol 25 (9) ◽  
pp. 660-673 ◽  
Author(s):  
Jürgen Slowack ◽  
Stefaan Mys ◽  
Jozef Škorupa ◽  
Nikos Deligiannis ◽  
Peter Lambert ◽  
...  
Keyword(s):  
Video Coding ◽  
Rate Distortion ◽  
Distributed Video Coding ◽  
Mode Decision

scholarly journals Adaptive mode decision with residual motion compensation for distributed video coding

2015 ◽  
Vol 4 ◽  
Author(s):  
Huynh Van Luong ◽  
Søren Forchhammer ◽  
Jürgen Slowack ◽  
Jan De Cock ◽  
Rik Van de Walle
Keyword(s):  
Video Coding ◽  
Motion Compensation ◽  
Rate Distortion ◽  
Low Complexity ◽  
Distributed Video Coding ◽  
Mode Decision ◽  
Coding Efficiency ◽  
Residual Motion ◽  
A Current

Distributed video coding (DVC) is a coding paradigm that entails low complexity encoding by exploiting the source statistics at the decoder. To improve the DVC coding efficiency, this paper presents a novel adaptive technique for mode decision to control and take advantage of skip mode and intra mode in DVC initially proposed by Luong et al. in 2013. The adaptive mode decision (AMD) is not only based on quality of key frames but also the rate of Wyner–Ziv (WZ) frames. To improve noise distribution estimation for a more accurate mode decision, a residual motion compensation is proposed to estimate a current noise residue based on a previously decoded frame. The experimental results, integrating AMD in two efficient DVC codecs, show that the proposed AMD DVC significantly improves the rate distortion performance without increasing the encoding complexity. For a GOP size of 2 on the set of six test sequences, the average (Bjøntegaard) bitrate saving of the proposed codec is 35.5% on WZ frames compared with the DISCOVER codec. This saving is mainly achieved by AMD.

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