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Perceptual Quality Evaluation of Low-Bit Rate Model-Assisted H.261-Compatible Video

  • Arnaud Jacquin

Abstract

We describe an experiment conducted so as to evaluate the perceptual quality of low-bit rate H.261-compatible video. The video coding systems tested are based on CCITT Recommendation H.261, operating at the bit rates of 48 and 24 kbps, at the constant frame rates of 7.5, 5 and 2 fps, and are followed by a postprocessing module. One system uses the concept of model-assisted coding which results in a better rendition of facial features—producing better eye contact and lip synchronization—at the expense of a slightly lower quality in the rest of the image.

Keywords

Video Code Mean Opinion Score Rate Video Motion Content Audio Track 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1996

Authors and Affiliations

  • Arnaud Jacquin
    • 1
  1. 1.Signal Processing Research DepartmentAT&T Bell LaboratoriesMurray HillUSA

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