| 基于主观质量控制的数字视频综合抗误码技术 |
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| 引用本文： | 宋彬,常义林. 基于主观质量控制的数字视频综合抗误码技术[J]. 电子学报, 2001, 29(7): 919-922 |
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| 作者姓名： | 宋彬 常义林 |
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| 作者单位： | 西安电子科技大学通信工程学院,陕西西安 710071 |
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| 基金项目： | 国家高技术研究发展计划(863计划)，863-317-04-15-99， |
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| 摘 要： | 本文系统地提出了一套视频通信中的综合抗误码技术.本文针对窄带噪声信道,在H.263+编码的基础上,首先提出了视频主观质量控制策略;并在编码端根据视频信息的重要程度相应采用了非等重保护的前向纠错(FEC)算法,当恢复视频仍有误码时,则在解码端根据不同的帧编码类型使用相应的时/空误码掩盖方法提高恢复视频质量.计算机仿真结果表明,采用以视频主观质量控制策略为核心的综合抗误码技术,在高误码环境下,恢复视频信噪比可提高10-20dB,主观视频质量可提高1-2个等级.该综合抗误码方案已在实际中得到应用.
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| 关 键 词： | 视频通信 主观质量控制策略 非等重FEC 时/空误码掩盖 |
| 文章编号： | 0372-2112 (2001) 07-0919-04 |
| 收稿时间： | 2000-07-20 |
Subjective Quality Controlling Based Integrated Error Resilience Technology for Video Communication |
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| SONG Bin,CHANG Yi-lin. Subjective Quality Controlling Based Integrated Error Resilience Technology for Video Communication[J]. Acta Electronica Sinica, 2001, 29(7): 919-922 |
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| Authors: | SONG Bin CHANG Yi-lin |
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| Affiliation: | School of Telecommunication Engineering,XiDian University,Xi'an,Shanxi 710071,China |
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| Abstract: | An integrated error resilience technology for video communication is proposed in this paper.At beginning,a control strategy of subjective video quality is presented.Then,an unequal forward error-correction (FEC) based on H.263+ video coder is suggested to protect the different video information.However,if there are still error bits in the reconstructed images,temporal/spatial error concealment is used in the video decode according to the various coding types.Simulation results show that the subjective and objective video quality is obviously improved using proposed integrated error resilience technology with control of subjective quality.These technologies have been used in practice. |
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| Keywords: | video communication control strategy of subjective video quality unequal FEC temporal/spatial error concealment |
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