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Combining distributed video coding with super-resolution to achieve H.264/AVC performance

[+] Author Affiliations
Robert Klepko

Communications Research Centre Canada, 3701 Carling Avenue Ottawa, Ontario, Canada K2H 8S2

Demin Wang

Communications Research Centre Canada, 3701 Carling Avenue Ottawa, Ontario, Canada K2H 8S2

Grégory Huchet

Communications Research Centre Canada, 3701 Carling Avenue Ottawa, Ontario, Canada K2H 8S2

J. Electron. Imaging. 21(1), 013011 (Apr 18, 2012). doi:10.1117/1.JEI.21.1.013011
History: Received February 23, 2011; Revised November 1, 2011; Accepted January 3, 2012
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Abstract.  Distributed video coding (DVC) is an emerging video coding paradigm for systems that require low-complexity encoders that are supported by high-complexity decoders as required, for example, in real-time video capture and streaming from one mobile phone to another. Under the assumption of an error-free transmission channel, the coding efficiency of current DVC systems is still below that of the latest video codecs, such as H.264/AVC. In order to increase the coding efficiency, we propose that every Wyner-Ziv frame be downsampled by a factor of two prior to encoding and the subsequent transmission. However, this would necessitate upsampling in conjunction with interpolation at the decoder. Simple interpolation (e.g., a bilinear or bicubic filter) would be insufficient because the high-frequency (HF) spatial image content would be missing. Instead, we propose the incorporation of a super-resolution (SR) technique based upon the example-based scene-specific method to allow this HF content to be recovered. The SR technique will add computational complexity to the decoder side of the DVC system, which is allowable within the DVC framework. Rate-distortion curves show that this novel combination of SR and DVC improves the system’s peak signal-to-noise ratio (PSNR) performance by up to several decibels and can actually exceed the performance of the H.264/AVC codec when GOP = IP for some video sequences.

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© 2012 SPIE and IS&T

Citation

Robert Klepko ; Demin Wang and Grégory Huchet
"Combining distributed video coding with super-resolution to achieve H.264/AVC performance", J. Electron. Imaging. 21(1), 013011 (Apr 18, 2012). ; http://dx.doi.org/10.1117/1.JEI.21.1.013011


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