An unequal error protection method for packet video transmission over wireless channels

被引：0

作者：

Kung, WY ^{[1
]}

Kim, CS ^{[1
]}

Kuo, CCJ ^{[1
]}

机构：

[1] Univ So Calif, Integrated Media Syst Ctr, Los Angeles, CA 90089 USA

来源：

ENABLING TECHNOLOGIES FOR 3G AND BEYOND | 2001年 / 4529卷

关键词：

Wireless video transmission; unequal error protection; channel code assignment;

D O I：

10.1117/12.447393

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

A robust video transmission technique that protects video signals over wireless channels is proposed in this work. First, we present new packetization and concealment methods for compressed video data. Second, the loss of each packet is quantitatively measured under this normative concealment method. More specifically, the encoder associates each packet with the mean square error between the error-free reconstruction and the concealed reconstruction. Third, a channel code rate is adaptively allocated to protect each packet so that the expected mean square error is minimized subject to a constraint on the overall bit rate. Extensive simulations show that the jointly designed video codec provides acceptable image quality in a high bit error rate environment. Besides. the proposed algorithm can be applied to real time video transmission applications, since its computational complexity is very low.

引用

页码：13 / 24

页数：12

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