Paper Info
Title
RVLC decoding scheme for improved data recovery in MPEG-4 video coding standard
Abstract
In this paper, we present a low-complexity 'reversible variable length code' (RVLC) decoding scheme for MPEG-4 video that recovers more blocks and sometimes more macroblocks (MBs) from error propagation region of corrupted video packets, as compared to the MPEG-4 scheme. The remaining blocks and MBs are concealed. Simulation studies have been carried out to show that the proposed scheme achieves better data recovery, both in terms of peak-signal-to-noise ratio (PSNR) and perceptual quality. In addition, we present more conditions for error detection than those suggested in MPEG-4, discuss properties of error propagation in corrupted video packets, and provide the RVLC codeword structure. The use of RVLC code structure will enable the decoding in both directions by using only one code table, instead of separate tables used for forward and backward decoding. Since the scheme is purely decoder based, the compliance with the standard is fully maintained. It is very simple for the decoder to keep track of the additional blocks/MBs recovered by the proposed scheme. Therefore, the data recovery scheme suggested in MPEG-4 can still be used as default scheme.
Year
DOI
Venue
2004
10.1016/j.rti.2004.07.003
Real-Time Imaging
Keywords
Field
DocType
mpeg-4 scheme,improved data recovery,mpeg-4 video,decoding scheme,corrupted video packet,rvlc codeword structure,proposed scheme,rvlc code structure,data recovery scheme,rvlc decoding scheme,code table,default scheme,error propagation,error detection,peak signal to noise ratio
Propagation of uncertainty,Computer science,Network packet,Algorithm,Error detection and correction,Speech recognition,Real-time computing,Code word,Data recovery,Decoding methods,MPEG-4,Variable-length code
Journal
Volume
Issue
ISSN
10
5
Real-Time Imaging
Citations 
PageRank 
References 
2
0.48
10
Authors
2
Name
Order
Citations
PageRank
Sunil Kumar131117.84
Liyang Xu210810.10