H.264 rate-distortion model based joint source channel coding scheme over wireless channels

GAO Xue-juan; ZHUO Li; SHEN Lan-sun

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H.264 rate-distortion model based joint source channel coding scheme over wireless channels

更新时间：2024-10-14

- H.264 rate-distortion model based joint source channel coding scheme over wireless channels
- Issue 9, Pages: 24-31(2008)
- 作者机构：
  
  北京工业大学信号与信息处理研究室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN919.81
- Published：2008
- 稿件说明：
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GAO Xue-juan, ZHUO Li, SHEN Lan-sun. H.264 rate-distortion model based joint source channel coding scheme over wireless channels[J]. 2008, (9): 24-31.
DOI：

GAO Xue-juan, ZHUO Li, SHEN Lan-sun. H.264 rate-distortion model based joint source channel coding scheme over wireless channels[J]. 2008, (9): 24-31. DOI：

摘要

针对H.264编码器的率失真特性

建立了一种新的H.264编码率失真(R-D

rate-distortion)模型;然后基于该R-D模型和Turbo码的抗差错特性

对无线环境下的端到端视频传输失真进行了深入的分析

提出了一种无线信道下的自适应视频信源信道联合编码(JSCC

joint source channel coding)方案

该方案可以自适应地根据当前无线信道的具体状况

将网络可用带宽在信道编码和信源编码之间进行最优的分配

使得端到端的传输失真达到最小。实验结果表明

与固定选择信道编码速率方案相比

该方案可以显著提高传输的可靠性

在接收端可以获得更好的视频重建质量。

Abstract

A new rate-distortion model of H.264 encoder was firstly set up according to the rate distortion（R-D） charac-teristics of H.264.Then

the end-to-end video transmission distortion was analyzed and based on the R-D model of the H.264 encoder and the error combat characteristics of the Turbo code

an adaptive joint source channel coding（JSCC） over wireless channel was proposed

which could optimize the rate allocation of the available network bandwidth be-tween source coding and channel coding adaptively according to the actual condition of current wireless channel

so as to improve the robustness of the video transmission.The experiment results indicate that

compared with fix choice of channel coding rate

the proposed JSCC scheme is can greatly improve the transmission robustness and achieve better reconstructed video quality at the receiver.

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