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Video over DSL with LDGM Codes for Interactive Applications

Al-Jobouri, Laith and Casu, Filippo and Fleury, Martin and Cabrera, Julián (2016) 'Video over DSL with LDGM Codes for Interactive Applications.' Computers, 5 (2). p. 9. ISSN 2073-431X

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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.

Item Type: Article
Uncontrolled Keywords: 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
Subjects: Q Science > QA Mathematics > QA75 Electronic computers. Computer science
Divisions: Faculty of Science and Health > Computer Science and Electronic Engineering, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 02 Mar 2017 12:00
Last Modified: 08 Jan 2022 00:33

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