Patent ID: 7233348
Filing Date: 2007-06-19
Classification: H04N

Abstract:
1. A test method of comparing two frames from a received video sequence to non-intrusively assess the quality of a received video sequence, the method comprising: (i) taking a first frame from said received video sequence; (ii) taking the subsequent frame from said sequence; (iii) comparing one pixel from the first frame with the corresponding pixel from the subsequent frame to detect variation of a pixel property with respect to nearby pixels within a first neighborhood as compared to nearby pixels in a second neighborhood beyond said first neighborhood to drive a blockiness indicator value for a compared frame; (iv) repeating step (iii) for all pixels in a test area of the first frame; (v) inferring a scene cut if the results of the comparison stage indicate a small number of substantially equal pixels; (vi) ignoring comparisons indicating a scene cut in deriving a frame quality assessment using said blockiness indicator values; and (vii) providing said frame quality assessment as data output from said method.