Correlation Noise-Based Unequal Error Protected Rate-Adaptive Codes for Distributed Video Coding

Distributed video coding (DVC) is a paradigm that can shift most of the computational intensive tasks from the encoder to the decoder. This allows for the design of low complexity encoders that can be deployed in devices equipped with limited resources. However, the compression efficiency obtained u...

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Bibliographic Details
Published in:IEEE transactions on circuits and systems for video technology 2014-01, Vol.24 (1), p.127-140
Main Authors: Micallef, Jeffrey J., Farrugia, Reuben A., Debono, Carl James
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Coding, codes
Correlation
Correlation noise modeling
Decoding
distributed video coding (DVC)
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Encoding
Exact sciences and technology
Image processing
Information, signal and communications theory
low-density parity-check codes
Parity check codes
Reliability
Sampling, quantization
Signal and communications theory
Signal convertors
Signal processing
Silicon
Syner-Ziv (WZ) video coding
Telecommunications and information theory
Video coding
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Summary:Distributed video coding (DVC) is a paradigm that can shift most of the computational intensive tasks from the encoder to the decoder. This allows for the design of low complexity encoders that can be deployed in devices equipped with limited resources. However, the compression efficiency obtained using practical DVC codecs are still distant from those of traditional predictive video coding schemes such as H.264/AVC. One of the limitations of the existing DVC architectures is that they consider the correlation noise to be randomly distributed across the whole video frame. This paper shows that the Syner-Ziv (WZ) values that are closer to the endpoints of the quantization intervals have a higher probability of producing incorrect side information (SI) predictions. Thus, through this knowledge, rate-adaptive low-density parity-check accumulate codes that provide a higher level of protection to the unreliable SI bits can be exploited. Experimental results show that the proposed scheme can reduce the WZ bit-rate up to 13% relative to the state-of-the-art DISCOVER architecture when considering interpolation techniques and by up to 0.9 dB for extrapolation techniques.
ISSN:1051-8215
1558-2205
DOI:10.1109/TCSVT.2013.2273630