28 January 2008 Relation between bitrate, motion and framerate for scoring of image sequences
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The quality of encoded image sequences is often assessed by a subjective test. Depending of the test paradigm used in the subjective campaign the observer get as much time as he needs to find a stable result. In video sequences, three parameters have to be managed carefully: the bitrate, the frame-rate and the motion contained in video itself. Therefore it is desirable to know the relation between the frame rate, the motion, the bitrate and the quality. This study aims to allow the selection of coherent contents for the subjective assessment experiments. For example, at which frame-rate a sequence has to be displayed in order to have a correct judgment of its quality. The image sequences were presented with five different frame-rates ranging from 10 to 40 and four bitrates ranging between 0.12bpp and 0.32bpp. The video sequences were chosen with regards to their motion quantity. The motion has been characterized using the specification of MPEG-7 in order to organize the optical flux in several classes. Special care was taken to avoid the memorization effect usually present after short presentations.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mohamed-Chaker Larabi and Louise Quoirin "Relation between bitrate, motion and framerate for scoring of image sequences", Proc. SPIE 6808, Image Quality and System Performance V, 680815 (28 January 2008); doi: 10.1117/12.766659; https://doi.org/10.1117/12.766659


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