NDLI: Side information refinement for long duration GOPs in DVC

Content Provider	IEEE Xplore Digital Library
Author	Petrazzuoli, G. Maugey, T. Cagnazzo, M. Pesquet-Popescu, B.
Copyright Year	2010
Description	Author affiliation: Signal and Image Processing Department, Institut TELECOM - TELECOM ParisTech 46 rue Barrault, F-75634 Paris Cedex 13, France (Petrazzuoli, G.; Maugey, T.; Cagnazzo, M.; Pesquet-Popescu, B.)
Abstract	Side information generation is a critical step in distributed video coding systems. This is performed by using motion compensated temporal interpolation between two or more key frames (KFs). However, when the temporal distance between key frames increases (i.e. when the GOP size becomes large), the linear interpolation becomes less effective. In a previous work we showed that this problem can be mitigated by using high order interpolation. Now, in the case of long duration GOP, state-of-the-art algorithms propose a hierarchical algorithm for side information generation. By using this procedure, the quality of the central interpolated image in a GOP is consistently worse than images closer to the KFs. In this paper we propose a refinement of the central WZFs by higher order interpolation of the already decoded WZFs, that are closer to the WZF to be estimated. So we reduce the fluctuation of side information quality, with a beneficial impact on final rate-distortion characteristics of the system. The experimental results show an improvement on the SI up to 2.71 dB with respect the state-of-the-art and a global improvement of the PSNR on the decoded frames up to 0.71 dB and a bit rate reduction up to 15 %.
Starting Page	309
Ending Page	314
File Size	529459
Page Count	6
File Format	PDF
ISBN	9781424481101
e-ISBN	9781424481125
e-ISBN	9781424481118
DOI	10.1109/MMSP.2010.5662038
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-04
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Estimation Decoding PSNR Interpolation Encoding Silicon Books
Content Type	Text
Resource Type	Article

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