文章基本信息

标题：Video over DSL with LDGM Codes for Interactive Applications
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作者：Laith Al-Jobouri ; Filippo Casu ; Martin Fleury 等
期刊名称：Computers
电子版ISSN：2073-431X
出版年度：2016
卷号：5
期号：2
页码：9-26
DOI：10.3390/computers5020009
出版社：MDPI Publishing
摘要：Digital Subscriber Line (DSL) network access is subject to error bursts, which, for interactive video, can introduce unacceptable latencies if video packets need to be re-sent. If the video packets are protected against errors with Forward Error Correction (FEC), calculation of the application-layer channel codes themselves may also introduce additional latency. This paper proposes Low-Density Generator Matrix (LDGM) codes rather than other popular codes because they are more suitable for interactive video streaming, not only for their computational simplicity but also for their licensing advantage. The paper demonstrates that a reduction of up to 4 dB in video distortion is achievable with LDGM Application Layer (AL) FEC. In addition, an extension to the LDGM scheme is demonstrated, which works by rearranging the columns of the parity check matrix so as to make it even more resilient to burst errors. Telemedicine and video conferencing are typical target applications.
关键词：digital subscriber line (DSL); forward error correction (FEC); low density generator matrix (LDGM); low-density parity-check (LDPC); low latency; packet loss; reed-solomon (RS); video streaming digital subscriber line (DSL) ; forward error correction (FEC) ; low density generator matrix (LDGM) ; low-density parity-check (LDPC) ; low latency ; packet loss ; reed-solomon (RS) ; video streaming