Margaret H. Pinson; Stephen Wolf

Abstract: This contribution presents a new technique for estimating temporal delays between input and output video streams from video teleconferencing systems. The discussion in this contribution is limited to "constant alignment," defined as an alignment process that computes the same fixed alignment offset, or delay, for every output video frame in a given output video sequence. Constant alignment can (1) serve as a starting point for variable alignment techniques, where each output frame can have a unique alignment offset, or delay, and (2) be used to align low frame rate output video sequences in preparation for measuring video quality parameters. The constant alignment technique that is presented is applicable for real-time in-service monitoring since it utilizes a set of computationally efficient low bandwidth features that are extracted from the input and output video streams.

Keywords: video delay; temporal alignment; low bandwidth features

For technical information concerning this report, contact:

Margaret H. Pinson
Institute for Telecommunication Sciences
(303) 497-3579

To request a reprint of this report, contact:

Lilli Segre, Publications Officer
Institute for Telecommunication Sciences
(303) 497-3572

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.

Back to Search Results