Institute for Telecommunication Sciences
the research laboratory of the National Telecommunications and Information Administration

Dwight Melcher; Stephen Wolf

Abstract: Describes an algorithm for (1) quantifying the spatial gradients or edges in an image as a function of angle or orientation, (2) extracting low bandwidth features from these input and corresponding output spatial gradient images, and (3) deriving objective video quality metrics from these low bandwidth features that quantify the amount of tiling (i.e., blocking) and blurring in the output image. Examples are given for images that have been compressed by MPEG and video teleconferencing codecs.

Keywords: digital; performance; Video; quality; objective; impairments; blocking; Testing; spatial; compression; scene; MPEG; tiling; teleconferencing; codecs


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Lilli Segre, Publications Officer
Institute for Telecommunication Sciences
(303) 497-3572
LSegre@ntia.gov

For technical information concerning this report, contact:

Margaret H. Pinson
Institute for Telecommunication Sciences
(303) 497-3579
mpinson@ntia.doc.gov


Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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