An objective approach to measuring video playback quality in lossy networks using TCP

Timothy R. Porter, Xiao-Hong Peng

Research output: Contribution to journalArticlepeer-review


In this work, we investigate a new objective measurement for assessing the video playback quality for services delivered in networks that use TCP as a transport layer protocol. We define the new metric as pause intensity to characterize the quality of playback in terms of its continuity since, in the case of TCP, data packets are protected from losses but not from delays. Using packet traces generated from real TCP connections in a lossy environment, we are able to simulate the playback of a video and monitor buffer behaviors in order to calculate pause intensity values. We also run subjective tests to verify the effectiveness of the metric introduced and show that the results of pause intensity and the subjective scores made over the same real video clips are closely correlated.
Original languageEnglish
Pages (from-to)76-78
Number of pages3
JournalIEEE Communications Letters
Issue number1
Early online date11 Nov 2010
Publication statusPublished - Jan 2011

Bibliographical note

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  • buffer behaviors
  • data packets
  • lossy environment
  • lossy networks
  • packet traces
  • pause intensity
  • real TCP connections
  • transport layer protocol
  • video clips
  • video playback quality


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