Bandwidth Efficient Adaptive Forward Error Correction Mechanism with Feedback Channel

被引：10

作者：

Ali, Farhan Azmat ^{[1
]}

Simoens, Pieter ^{[1
,2
]}

Van de Meerssche, Wim ^{[1
]}

Dhoedt, Bart ^{[1
]}

机构：

[1] Ghent Univ iMinds, Dept Informat Technol INTEC, B-9050 Ghent, Belgium

[2] Univ Ghent, Dept IT&C, B-9000 Ghent, Belgium

来源：

JOURNAL OF COMMUNICATIONS AND NETWORKS | 2014年 / 16卷 / 03期

关键词：

Adaptive forward error correction (A-FEC); bandwidth optimization; error resilient system; feedback channel; VIDEO TRANSMISSION;

D O I：

10.1109/JCN.2014.000053

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Multimedia content is very sensitive to packet loss and therefore multimedia streams are typically protected against packet loss, either by supporting retransmission requests or by adding redundant forward error correction (FEC) data. However, the redundant FEC information introduces significant additional bandwidth requirements, as compared to the bitrate of the original video stream. Especially on wireless and mobile networks, bandwidth availability is limited and variable. In this article, an adaptive FEC (A-FEC) system is presented whereby the redundancy rate is dynamically adjusted to the packet loss, based on feedback messages from the client. We present a statistical model of our A-FEC system and validate the proposed system under different packet loss conditions and loss probabilities. The experimental results show that 57-95% bandwidth gain can be achieved compared with a static FEC approach.

引用

页码：322 / 334

页数：13