ITU-T J.247-2008
完整参考的客观感知多媒体视频质量测量
Objective perceptual multimedia video quality measurement in the presence of a full reference Study Group 9
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- 标准号
- ITU-T J.247-2008
- 发布日期
- 2008年08月01日
- 实施日期
- 废止日期
- 无
- 中国标准分类号
- M63
- 发布单位
- IX-ITU
- 引用标准
- ITU-T P.910-2008 ITU-T P.911-1998 ITU-T J.143-2000
- 适用范围
- 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)