ITU-T J.247-2008
Objective perceptual multimedia video quality measurement in the presence of a full reference Study Group 9

Standard No.

ITU-T J.247-2008

Release Date

2008

Published By

International Telecommunication Union (ITU)

Latest

ITU-T J.247-2008

Scope

This Recommendation provides guidelines and recommendations on the selection of appropriate perceptual video quality measurement equipment for use in multimedia applications when the full reference measurement method can be used. The full reference measurement method can be used when the unimpaired reference video signal is readily available at the measurement point, as may be the case of measurements on individual equipment or a chain in the laboratory or in a closed environment such as a cable television headend. The estimation methods are based on processing video in VGA, CIF, and QCIF resolution. The validation test material contained both multiple coding degradations and various transmission error conditions (e.g. bit errors, dropped packets). In the case where coding distortions are considered in the video signals, the encoder can utilize various compression methods (e.g. MPEG-2, H.264, etc.). The models proposed in this Recommendation may be used to monitor the quality of deployed networks to ensure their operational readiness. The visual effects of the degradations may include spatial as well as temporal degradations (e.g. frame repeats, frame skips, frame rate reduction). The models in this Recommendation can also be used for lab testing of video systems. When used to compare different video systems, it is advisable to use a quantitative method (such as that in J.149) to determine the models’ accuracy for that particular context. This Recommendation is deemed appropriate for telecommunications services delivered at 4 Mbit/s or less presented on mobile/PDA and computer desktop monitors. The following conditions were allowed in the validation test for each resolution: • PDA/Mobile (QCIF): 16 kbit/s to 320 kbit/s • CIF: 64kbit/s-2Mbit/s (C01 has several 2 Mbit/s) • VGA: 128kbit/s-4Mbit/s (V13 has one HRC with 6Mbit/s)

ITU-T J.247-2008 Referenced Document

• ITU-T J.143-2000 User Requirements for Objective Perceptual Video Quality Measurements in Digital Cable Television Series J: Transmission of Television Sound Programme and Other Multimedia Signals Measurement of the Quality of Service Study Group 9
• ITU-T P.910-2008 Subjective video quality assessment methods for multimedia applications Study Group 9
• ITU-T P.911-1998 Subjective Audiovisual Quality Assessment Methods for Multimedia Applications - Series P: Telephone Transmission Quality Telephone Installations Local Line Networks Audiovisual Quality in Multimedia Services Study Group 12; 27 pp

ITU-T J.247-2008 history

• 2008 ITU-T J.247-2008 Objective perceptual multimedia video quality measurement in the presence of a full reference Study Group 9