[1]葛伟[],陈瑞[],曹雪虹[][]. 基于HQAM的视频传输不等保护方法[J].计算机技术与发展,2014,24(10):241-245.
　GE Wei[],CHEN Rui[],CAO Xue-hong[][]. Unequal Error Protection Strategy for Video Transmission Based on HQAM[J].,2014,24(10):241-245.
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 基于HQAM的视频传输不等保护方法()
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《计算机技术与发展》[ISSN:1006-6977/CN:61-1281/TN]

卷:
24
期数:
2014年10期
页码:
241-245
栏目:
应用开发研究
出版日期:
2014-10-10

文章信息/Info

Title:
 Unequal Error Protection Strategy for Video Transmission Based on HQAM
文章编号:
1673-629X（2014）10-0241-05
作者:
 葛伟[1];  陈瑞[2] ; 曹雪虹[1][2]
1. 南京邮电大学 通信与信息工程学院；2.南京工程学院 通信工程学院
Author(s):
 GE Wei[1]; CHEN Rui[2] ; CAO Xue-hong[1][2]
关键词:
 ; 级正交幅度调制; 不等保护; 视频传输; H. 264/AVC
Keywords:
 ; hierarchical quadrature amplitude modulation; unequal error protection; video transmission;  ; H. 264/AVC
分类号:
TN919.8
文献标志码:
A
摘要:
 针对传统视频传输重建图像质量低的问题，文中提出了一种利用HQAM(分级正交幅度调制)为视频码流中重要性不同部分提供不等保护的无线视频传输方法。由于压缩后视频流中不同部分对传输错误的敏感度不同，因而在视频恢复过程中的重要性也就不同，文中利用HQAM在不增加传输带宽的情况下为高优先级数据(高敏感度)提供较高强度的保护，但是是以牺牲低优先级数据(低敏感度)的误码率为代价的。在仿真环境为加性高斯白噪声信道( AWGN)下进行了仿真，结果表明，与均等保护相比，在相同信道带宽和Eb/No条件下，该方法有效提高了视频重建质量。
Abstract:
 Aiming at the traditional video transmission problem of low quality reconstructed image,a novel unequal error protection strate-gy for video transmission over the wireless channel by using Hierarchical Quadrature Amplitude Modulation ( HQAM) is proposed. Based on the unequal sensitivity of coded bit stream against transmission errors,investigate the properties of HQAM constellation to provide dif-ferent degree of error protection to the coded bits having different degree of importance. Using HQAM to protect higher priority ( more sensitive) bits strongly without any additional bandwidth,but at the cost of increased errors in the lower priority ( less sensitive) bits. The performance of the transmission system is evaluated under the Additive White Gaussian Noise ( AWGN) . The simulation results indicate that the strategy produces a high quality of the reconstructed video data compared with uniform protection under the same channel width and Eb. No.

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更新日期/Last Update: 2015-04-03