20140294362 | METHOD AND APPARATUS FOR DETECTING QUALITY DEFECTS IN A VIDEO BITSTREAM - There is provided an apparatus for detecting a quality defect in a video sequence, the apparatus comprising: a receiver arranged to receive a video bitstream representing a video sequence; and a defect module arranged to determine a measure of quantization parameter for each picture of the video sequence, the defect module further arranged to identify a quality defect when an abrupt change in the measure of quantization parameter occurs. | 10-02-2014 |