Title :
An Effective Error Concealment for H.264/AVC
Author :
Son, Namrye ; Jeong, Senator
Author_Institution :
Dept. of Internet Software, Honam Univ., Gwangju
Abstract :
To transmit video bit stream over low bandwidth such as mobile channel, high bit rate algorithm like H.264/AVC codec is exploited. In transmitting high compressed video bit-stream over low bandwidth, packet loss causes severe degradation in image quality. In this paper, a new error concealment algorithm for recovery of missing or erroneous motion vector is proposed. Considering that the missing or erroneous motion vectors in blocks are closely correlated with those of neighboring blocks. The proposed approach is that missing or erroneous motion vector is recovered by grouping the movements of neighboring blocks by their homogeneity. Motion vectors of neighboring block are grouped according to average linkage algorithm clustering and a representative value for each group is determined to obtain the candidate motion vector sets. As a test result, simulation results show that the proposed method dramatically improves complex time compared to existing H.264/AVC error concealment method. Also the proposed method is similar to existing H.264/AVC in terms of visual quality.
Keywords :
data compression; image motion analysis; video coding; H.264/AVC; compressed video bit-stream; erroneous motion vector; error concealment method; image quality; linkage algorithm clustering; mobile channel; movements grouping; packet loss; video bit stream; visual quality; BMA; H.264/AVC; clustering; error concealment;
Conference_Titel :
Computer and Information Technology Workshops, 2008. CIT Workshops 2008. IEEE 8th International Conference on
Conference_Location :
Sydney, QLD
Print_ISBN :
978-0-7695-3242-4
Electronic_ISBN :
978-0-7695-3239-1
DOI :
10.1109/CIT.2008.Workshops.106