Patent ID: 7869523
Filing Date: 2011-01-11
Classification: H04N

Abstract:
1. A method of filtering reconstructed samples to minimize coding artifacts introduced at a block boundary in a block-based video encoder and/or decoder, the method comprising: calculating a pair of indices used to access a table of a pair of corresponding activity threshold values, the indices calculated using an average quantization parameter and an offset parameter; determining the activity threshold values based on the pair of indices; confirming whether the filtering process will modify the sample values on every line of samples for the block boundary by checking a content activity for the every line of samples for said block boundary, the content activity based on the determined activity threshold values; and filtering the confirmed samples when a block on either side of the block boundary was coded using inter prediction wherein a pair of the activity threshold values are ALPHA (α) and BETA (β), and the average quantization parameter, QP