| 摘要 |
The present invention relates generally to the domain of digital signal processing and, more precisely, the methods and apparatus employed in the reduction of visibility of blockiness in images or video sequences encoded using block-based coding techniques such as MPEG. The present invention detects a level of blockiness between blocks in an image and applies a variable filter across the block boundaries. The filter parameters are chosen depending on the level of blockiness detected. If no blockiness is detected then no filtering is performed on the image. An important aspect of the present invention reduces the false detection of naturally occurring blockiness in images by analysing the image both spatially and temporally. <IMAGE> |
