Lip synchronization within an adaptive VOD system

Lintian Qiao, Klara Nahrstedt

Research output: Contribution to journalConference articlepeer-review


Many current distributed multimedia applications such as Video on Demand (VOD) are designed, implemented and used on top of general purpose OS and network platforms (e.g., UNIX/Internet). Within this 'best-effort' environment, applications must use adaptive synchronization protocols and balance non-deterministic behavior of the underlying OS/network subsystem to achieve user acceptance for lip synchronization of the audio-visual information. We have designed, implemented and validated an adaptive synchronization scheme integrating adaptive services and synchronization protocols to provide lip synchronization within a VOD system. Our results indicate that most of the synchronization skew values (85 %) are in the user desirable range of (-80, 80) ms and that the remaining skew values are in the user acceptable range of (-160, 160) ms.

Original languageEnglish (US)
Pages (from-to)170-181
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Jan 24 1997
Externally publishedYes
EventMultimedia Computing and Networking 1997 - San Jose, United States
Duration: Feb 8 1997Feb 14 1997


  • Adaptive scheme
  • Client/server protocol
  • Lip synchronization
  • Synchronization skew

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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