Browsing by Author "Shih, Jhong-Yu"

Now showing 1 - 2 of 2

A new unequal error protection scheme based on FMO
(2010-05-01)
Shih, Jhong-Yu
;
Tsai, Wen-Jiin
;
資訊工程學系
;
Department of Computer Science
This paper presents a novel scheme for video transmission over error-prone networks. The proposed scheme exploits the error resilient features of H.264/AVC and employs an unequal error protection (UEP) approach to protect effectively the streams. A novel algorithm is proposed to classify macroblocks into slice groups using the explicit mode of Flexible Macroblock Ordering (FMO). A rate distortion optimized algorithm is used to assign unequal amounts of FEC protection to the resulting slice groups according to their importance. In addition, a Converged Motion Estimation (CME) is proposed to further improve the proposed UEP scheme. The idea behind the CME is to make the macroblocks be referenced in a skewed manner, such that highly important macroblocks are converged on only a few and the use of redundancy for error protection is efficient. Simulation results show the superiority of the proposed method over other approaches for transmission of H.264/AVC streams.
A NEW UNEQUAL ERROR PROTECTION SCHEME BASED ON FMO
(2008)
Shih, Jhong-Yu
;
Tsai, Wen-Jiin
;
資訊工程學系
;
Department of Computer Science
In this paper we present a slice group based unequal error protection (UEP) scheme for video transmission over error-prone networks. We propose a method to assign macroblock to slice groups based on a variation of H.264/AVC dispersed FMO mode and k-means clustering algorithm. In addition, a Converged Motion Estimation (CME) is proposed to further improve our UEP scheme. The idea behind the CME is to make the macroblocks be referenced in a skewed manner, such that highly important macroblocks are converged on only a few and the use of redundancy for error protection is efficient. Our experiments on many video sequences show promising results.