| Temporal Error Concealment Technique for MPEG-4 Video Streams |
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| 作者姓名： | 丁学文 杨兆选 郭迎春 |
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| 作者单位： | School of Electronic Information Engineering Tianjin University Tianjin 300072 China School of Electronic Information Engineering Tianjin University of Technology and Education Tianjin 300222 China，School of Electronic Information Engineering Tianjin University Tianjin 300072 China，School of Electronic Information Engineering Tianjin University Tianjin 300072 China |
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| 基金项目： | Supported by National Natural Science Foundation of China (No. 60302018). |
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| 摘 要： | Concerning inter4v mode employed widely in MPEG-4 video, a new temporal error concealment scheme for MPEG-4 video sequences is proposed, which can selectively interpolate one or four motion vectors (MVs) for the missing macroblock (MB) according to the estimated MB coding mode. Performance of the proposed scheme is compared with the existing schemes with multiple testing sequences at different bit error rates. Experimental results show that the proposed algorithm can mask the impairments caused by transmission errors more efficiently than 0 MV and average MV methods by consuming more time for different bit error rates. It has an acceptable image quality close to that obtained by the selective motion vector matching (SMVM) algorithm, while taking less than half of cycles of operations. The proposed concealment scheme is suitable for low complexity video real-time implementations.
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| 关 键 词： | 图象质量 MPEG-4 解码 错误隐藏 误码率 |
| 收稿时间： | 2006-03-14 |
Temporal Error Concealment Technique for MPEG-4 Video Streams |
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| DING Xuewen,YANG Zhaoxuan,GUO Yingchun.Temporal Error Concealment Technique for MPEG-4 Video Streams[J].Transactions of Tianjin University,2006,12(4):291-296. |
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| Authors: | DING Xuewen YANG Zhaoxuan GUO Yingchun |
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| Abstract: | Concerning inter4v mode employed widely in MPEG-4 video, a new temporal error concealment scheme for MPEG-4 video sequences is proposed, which can selectively interpolate one or four motion vectors (MVs) for the missing macroblock (MB) according to the estimated MB coding mode. Performance of the proposed scheme is compared with the existing schemes with multiple testing sequences at different bit error rates. Experimental results show that the proposed algorithm can mask the impairments caused by transmission errors more efficiently than 0 MV and average MV methods by consuming more time for different bit error rates. It has an acceptable image quality close to that obtained by the selective motion vector matching (SMVM) algorithm, while taking less than half of cycles of operations. The proposed concealment scheme is suitable for low complexity video real-time implementations. |
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| Keywords: | image quality MPEG-4 decoding vector error concealment bit error rate |
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