Proceedings ArticleDOI
Inverse Bit Plane Decoding Order for Turbo Code Based Distributed Video Coding
Yuri Vatis,Sven Klomp,Jörn Ostermann +2 more
- Vol. 2, pp 1-4
TLDR
For turbo code based Wyner-Ziv codecs, an inverse bit plane decoding order is proposed, which can obtain a decoding speedup of 30%, thus making DVC more attractive for real-time applications.Abstract:
For turbo code based Wyner-Ziv codecs, we propose to use an inverse bit plane decoding order. The investigations have shown that the knowledge about MSB's has only a marginal influence on LSB's, which can be regarded as noise, while the influence of LSB's on MSB's tends to be higher. As a results, we obtain a coding gain of up to 0.3 dB, especially for the sequences, which can only be decoded with a coding efficiency lower than H.264/AVC intra. Furthermore, the distribution of the requests for additional parity bits over the back channel is different compared to the conventional decoding order, resulting in a high number of requests for the last bit plane and a low number of requests for the other bit planes. Therefore, the decoder can request several puncturing levels for LSB's in one step, reducing the number of turbo decoding loops. Hence, transmitting the LSB's first, we can obtain a decoding speedup of 30%, thus making DVC more attractive for real-time applications.read more
Citations
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Journal ArticleDOI
Exploiting quantization and spatial correlation in virtual-noise modeling for distributed video coding
Jozef Skorupa,Jürgen Slowack,Stefaan Mys,Nikos Deligiannis,Jan De Cock,Peter Lambert,Adrian Munteanu,Rik Van de Walle +7 more
TL;DR: A correlation model able to adapt to changes in the content and the coding parameters by exploiting the spatial correlation of the video signal and the quantization distortion is developed and experiments suggest that the performance of distributed coders can be significantly improved by taking video content and coding parameters into account.
Journal ArticleDOI
BLAST-DVC: BitpLAne SelecTive distributed video coding
Wei-Jung Chien,Lina J. Karam +1 more
TL;DR: This paper presents a BitpLAne SelecTive (BLAST) distributed video coding (DVC) system that makes use of a correlation model for the original source information and the side information to measure the significance of each bitplane at the decoder.
Journal ArticleDOI
Distributed Video Coding With Feedback Channel Constraints
Jürgen Slowack,Jozef Skorupa,Nikos Deligiannis,Peter Lambert,Adrian Munteanu,R. Van de Walle +5 more
TL;DR: The proposed method for constraining the number of feedback requests to a fixed maximum number of N requests for an entire Wyner-Ziv (WZ) frame is studied, indicating that DVC with constrained feedback can be an important solution in the context of video-streaming scenarios.
Journal ArticleDOI
Evaluation of Side Information Effectiveness in Distributed Video Coding
TL;DR: This analysis allows to understand why in some cases PSNR-based metrics provide a fairly reliable estimation of the side information quality, while in other cases they do not, and allows to introduce a set of new metrics that are better adapted for side information effectiveness evaluation.
Proceedings ArticleDOI
Parallel iterative decoding of Transform Domain Wyner-Ziv video using cross bitplane correlation
TL;DR: A parallel iterative LDPC decoding scheme is proposed to improve the coding efficiency of TDWZ video codecs and is able to utilize cross bitplane correlation during decoding, by iteratively refining the soft-input, updating a modeled noise distribution and thereafter enhancing the bitplane decoding performance.
References
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Journal ArticleDOI
Noiseless coding of correlated information sources
David Slepian,Jack K. Wolf +1 more
TL;DR: The minimum number of bits per character R_X and R_Y needed to encode these sequences so that they can be faithfully reproduced under a variety of assumptions regarding the encoders and decoders is determined.
Journal ArticleDOI
The rate-distortion function for source coding with side information at the decoder
A.D. Wyner,Jacob Ziv +1 more
TL;DR: The quantity R \ast (d) is determined, defined as the infimum ofrates R such that communication is possible in the above setting at an average distortion level not exceeding d + \varepsilon .
Improving frame interpolation with spatial motion smoothing for pixel domain distributed video coding
TL;DR: Besides forward and bidirectional motion estimation, a spatial motion smoothing algorithm to eliminate motion outliers is proposed that allows significant improvements in the rate-distortion (RD) performance without sacrificing the encoder complexity.
Proceedings ArticleDOI
Studying Temporal Correlation Noise Modeling for Pixel Based Wyner-Ziv Video Coding
TL;DR: Three algorithms are proposed towards a more realistic WZ coding approach by performing online estimation of the error distribution at the decoder by exploring temporal correlation between frames however with different levels of granularity: frame, block and pixel levels.
Proceedings Article
Side information interpolation with sub-pel motion compensation for wyner-ziv decoder
TL;DR: This paper proposes an interpolation technique for the side information that uses motion compensation with sub-pel accuracy, and compares different interpolation filters for calculating the sub- Pel values.
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