Method and apparatus for context-based video quality assessment,申请号AU20130377642-传众专利搜索

Method and apparatus for context-based video quality assessment

申请公布号：AU2013377642(A1)

申请号：AU20130377642

申请日期：2013.06.09

申请公布日期：2015.07.23

申请人：

THOMSON LICENSING

发明人：LIAO, NING;CHEN, ZHIBO;ZHANG, FAN

分类号：H04N17/00

主分类号：H04N17/00

摘要：Spatial distortion (i.e., when a frame is viewed independently of other frames in a video sequence) may be quite different from temporal distortion (i.e., when frames are viewed continuously). To estimate temporal distortion, a sliding window approach is used. Specifically, multiple sliding windows around a current frame are considered. Within each sliding window, a large distortion density is calculated and a sliding window with the highest large distortion density is selected. A distance between the current frame and the closest frame with large distortion in the selected window is calculated. Subsequently, the temporal distortion is estimated as a function of the highest large distortion ratio, the spatial distortion for the current frame, and the distance. In another embodiment, a median of spatial distortion values is calculated for each sliding window and the maximum of median spatial distortion values is used to estimate the temporal distortion.