September 2011 | Technical Memorandum TM-11-482
Video Quality Model for Variable Frame Delay (VQM_VFD)
Cite This Publication
Stephen Wolf and Margaret H. Pinson, “Video Quality Model for Variable Frame Delay (VQM_VFD),” Technical Memorandum TM-11-482, U.S. Department of Commerce, National Telecommunications and Information Administration, Institute for Telecommunication Sciences, September 2011.
Stephen Wolf and Margaret H. Pinson 
Abstract: Time varying delays of the output (or processed) video frames with respect to the input (i.e., the original or reference) video frames present significant challenges for Full Reference (FR) video quality measurement systems. Time alignment errors between the output video sequence and the input video sequence can produce measurement errors that greatly exceed the perceptual impact of these time varying video delays. This document proposes a new video quality model (VQM) that properly accounts for the perceptual impact of variable frame delay (VFD). This new model, called VQM_VFD, also uses perceptual features extracted from spatial-temporal (ST) blocks of a fixed angular extent. This enables VQM_VFD to track subjective quality over a wide range of viewing distances and image sizes. VQM_VFD uses a neural network that achieves 0.9 correlation to subjective quality for subjective datasets at image sizes from Quarter Common Intermediate Format (QCIF) to High Definition TV (HDTV).
Keywords: measurement; model; video; quality; parameters; objective; subjective; correlation; calibration; delay; dropped; frames; full reference (FR); pausing; skipping; alignment; time; angular; distance; resolution; variable
For technical information concerning this report, contact:
Margaret H. Pinson
Institute for Telecommunication Sciences
(303) 497-3579
mpinson@ntia.doc.gov
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