CONTROLLING DEBLOCKING FILTERING

摘要

Pixel values of pixels (12, 14, 16, 22, 24, 26) in a line (15) of pixels (12, 14, 16, 18, 22, 24, 26, 28) are filtered with a strong deblocking filter to obtain filtered pixel values. Each filtered pixel value is clipped off to a respective clipping parameter value defined based on a position of the pixel (12, 14, 16, 22, 24, 26) relative to a block boundary (2) between two adjacent blocks (10, 20) of pixels (12, 14, 16, 18, 22, 24, 26, 28). The clipping parameter values change at least linearly depending in the pixel position relative to the block boundary (2) so that pixels (12, 16) in the line (15) of pixels (12, 14, 16, 18, 22, 24, 26, 28) having different positions from the block boundary (2) will have different clipping parameter values.

主权项

1. A filtering control method comprising:
filtering pixel values of pixels in a line of pixels in a block of pixels with a strong deblocking filter to obtain filtered pixel values; and clipping off, for each filtered pixel value of a pixel in said line of pixels, said filtered pixel value to a respective clipping parameter value defined based on a position of said pixel relative to a block boundary between said block of pixels and a neighboring block of pixels, wherein said clipping parameter values change at least approximately linearly depending on said position of said pixel relative to said block boundary and pixels in said line of pixels having different positions from said block boundary have different clipping parameter values.