Video over DSL with LDGM Codes for Interactive Applications

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...

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Published inComputers (Basel) Vol. 5; no. 2; p. 9
Main Authors Al-Jobouri, Laith, Casu, Filippo, Fleury, Martin, Cabrera, Julián
Format Journal Article
LanguageEnglish
Published MDPI AG 01.06.2016
Subjects
digital subscriber line (DSL)
forward error correction (FEC)
low density generator matrix (LDGM)
low latency
low-density parity-check (LDPC)
packet loss
reed-solomon (RS)
video streaming
Online AccessGet full text
ISSN2073-431X
2073-431X
DOI10.3390/computers5020009

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Abstract 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.
AbstractList 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.
Author Cabrera, Julián
Fleury, Martin
Al-Jobouri, Laith
Casu, Filippo
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Snippet Digital Subscriber Line (DSL) network access is subject to error bursts, which, for interactive video, can introduce unacceptable latencies if video packets...
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StartPage 9
SubjectTerms digital subscriber line (DSL)
forward error correction (FEC)
low density generator matrix (LDGM)
low latency
low-density parity-check (LDPC)
packet loss
reed-solomon (RS)
video streaming
Title Video over DSL with LDGM Codes for Interactive Applications
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