Title :
Error concealment for low bit rate video communication
Author :
Wei Xia ; Di Yang
Author_Institution :
Dept. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Error concealment (EC) is an efficient way to improve video quality against transmission errors because compressed video bit streams are extremely sensitive to packet loss over error-prone channels. Once packet loss occurs, the decoder may not reconstruct the video image well, and even fail to decode the bit streams if important data are missing. We study the problem of recovering pixels of lost macroblocks by using the existence and directions of neighboring pixels. In this paper, first, we propose a solution by detecting the directions of neighboring macroblocks and then predict the lost pixels by using directional weighted interpolation. Second, combing edge detection and directional interpolation algorithm, we propose an adaptive spatial-temporal algorithm scheme to deal with problems caused by abrupt scene changes of video sequences. The experimental results show that this method can improve the subjective quality of corrupted frames and obtain higher PSNR compared with algorithms in the H.264/AVC Joint Model decoder.
Keywords :
edge detection; image reconstruction; image sequences; interpolation; video coding; H.264/AVC joint model decoder; adaptive spatial-temporal algorithm scheme; compressed video bit streams; directional interpolation algorithm; directional weighted interpolation; edge detection; error concealment; error-prone channels; low bit rate video communication; neighboring macroblocks; neighboring pixels; video image reconstruction; video quality; video sequences; Decoding; Image edge detection; Interpolation; PSNR; Prediction algorithms; Streaming media; Video coding;
Conference_Titel :
Information Science and Technology (ICIST), 2013 International Conference on
Conference_Location :
Yangzhou
Print_ISBN :
978-1-4673-5137-9
DOI :
10.1109/ICIST.2013.6747717