Paper Info
Title
A flexible side information generation framework for distributed video coding
Abstract
One of the most efficient approaches to generate the side information (SI) in distributed video codecs is through motion compensated frame interpolation where the current frame is estimated based on past and future reference frames. However, this approach leads to significant spatial and temporal variations in the correlation noise between the source at the encoder and the SI at the decoder. In such scenario, it would be useful to design an architecture where the SI can be more robustly generated at the block level, avoiding the creation of SI frame regions with lower correlation, largely responsible for some coding efficiency losses. In this paper, a flexible framework to generate SI at the block level in two modes is presented: while the first mode corresponds to a motion compensated interpolation (MCI) technique, the second mode corresponds to a motion compensated quality enhancement (MCQE) technique where a low quality Intra block sent by the encoder is used to generate the SI by doing motion estimation with the help of the reference frames. The novel MCQE mode can be overall advantageous from the rate-distortion point of view, even if some rate has to be invested in the low quality Intra coding blocks, for blocks where the MCI produces SI with lower correlation. The overall solution is evaluated in terms of RD performance with improvements up to 2 dB, especially for high motion video sequences and long Group of Pictures (GOP) sizes.
Year
DOI
Venue
2010
10.1007/s11042-009-0316-6
Multimedia Tools Appl.
Keywords
Field
DocType
Distributed video coding,Wyner-Ziv video coding,Side information,Intra coding mode,Quality enhancement
Reference frame,Computer vision,Block-matching algorithm,Quarter-pixel motion,Group of pictures,Computer science,High-motion,Motion compensation,Artificial intelligence,Motion interpolation,Motion estimation
Journal
Volume
Issue
ISSN
48
3
1380-7501
Citations 
PageRank 
References 
19
0.69
17
Authors
3
Name
Order
Citations
PageRank
João Ascenso174894.30
Catarina Brites256341.30
Fernando Pereira3177172124.79