DE-BLOCKING FILTERING CONTROL

申请公布号：

EP2564594(A4)

申请号：

EP20110740109

申请日期：

2011.02.01

申请公布日期：

2014.04.02

申请人：

TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

发明人：

NORKIN, ANDREY;ANDERSSON, KENNETH;PRIDDLE, CLINTON

分类号：

H04N19/14;H04N19/117;H04N19/176;H04N19/182;H04N19/82;H04N19/86

主分类号：

H04N19/14

摘要：

First and second filter decision values are calculated for a pixel block in a video frame. The first filter decision value is representative of how smooth pixel values in a first line of pixels in the block and in a corresponding first line of pixels in a neighboring pixel block in the video frame are in a direction parallel to a filtering direction. The second filter decision value is representative of how close pixel values in a current line of pixels in the block approximate a flat line and how close pixel values in a corresponding current line of pixels in the neighboring block approximate a flat line. The two filter decision values are compared to respective thresholds and a strong de-blocking filter is selected for the current line if the filter decision values are below the thresholds, otherwise a weak de-blocking filter is selected to combat any blocking artifacts.