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http://dx.doi.org/10.6109/jkiice.2012.16.8.1675

Effects of LDPCA Frame Size for Parity Bit Estimation Methods in Fast Distributed Video Decoding Scheme  

Kim, Man-Jae (한밭대학교 정보통신전문대학원 멀티미디어공학과)
Kim, Jin-Soo (한밭대학교 정보통신공학과)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.16, no.8, 2012 , pp. 1675-1685 More about this Journal
Abstract
DVC (Distributed Video Coding) technique plays an essential role in providing low-complexity video encoder. But, in order to achieve the better rate-distortion performances, most DVC systems need feedback channel for parity bit control. This causes the DVC-based system to have high decoding latency and becomes as one of the most critical problems to overcome for a real implementation. In order to overcome this problem and to accelerate the commercialization of the DVC applications, this paper analyzes an effect of LDPCA frame size for adaptive LDPCA frame-based parity bit request estimations. First, this paper presents the LDPCA segmentation method in pixel-domain and explains the temporal-based bit request estimation method and the spatial-based bit request estimation method using the statistical characteristics between adjacent LDPCA frames. Through computer simulations, it is shown that the better performance and fast decoding is observed specially when the LDPCA frame size is 3168 in QCIF resolution.
Keywords
DVC; decoding delay; LDPCA frame size;
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Times Cited By KSCI : 4  (Citation Analysis)
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