With Progressive Fine Granularity Scalability (PFGS) video coding, one given encoding (with a prescribed bit rate) can flexibly be transmitted at any lower bit rate. However, the transmitted video is only efficiently encoded when the transmission bit rate is in the vicinity of the encoding bit rate; for transmission bit rates far from the encoding bit rate up on the order of 4 dB in video quality are lost. In this paper we develop and evaluate a suite of policies for accounting for this coding efficiency issue, which has been largely overlooked in previous PFGS streaming studies, in uniand multicast streaming. Our adaptive policies select the PFGS encoding rate from a small number of pre-encoded versions and drop packets so as to maximize the reconstructed video qualities. Our policies consider both the visual video content, expressed using the motion activity level of MPEG-7 descriptor, as well as the channel variability. We find that an optimal non-adaptive streaming policy overcomes the 4 dB inefficiency and on top of this efficiency gain, our adaptive unicast streaming policy achieves 0.8 dB improvement over the optimal non-adaptive streaming. We also find that our contentdependent packet drop policies enforce fairness among multiple streams in terms of reconstructed video qualities and that our multicasting policy improves the average reconstructed video qualities at a group of receivers by up to 2 dB.

Original languageEnglish (US)
Title of host publicationP2PMMS 2005 - Proceedings of the ACM Workshop on Advances in Peer-to-Peer Multimedia Streaming, co-located with ACM Multimedia 2005
PublisherAssociation for Computing Machinery, Inc
Number of pages10
ISBN (Electronic)1595932488, 9781595932488
StatePublished - Nov 11 2005
EventACM Workshop on Advances in Peer-to-Peer Multimedia Streaming, P2PMMS 2005 - Singapore, Singapore
Duration: Nov 11 2005 → …


OtherACM Workshop on Advances in Peer-to-Peer Multimedia Streaming, P2PMMS 2005
Period11/11/05 → …


  • Content-dependent coding
  • Content-dependent packet drop
  • Motion activity level
  • PFGS
  • Quality-dependent multicast

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Geography, Planning and Development

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