Patent ID: 9167270
Filing Date: 2015-10-20
Classification: H04N

Abstract:
1. An apparatus, comprising: a video encoder configured to encode picture data for at least a portion of a picture using adaptive filtering, wherein said video encoder includes an adaptive filter for performing the adaptive filtering, and wherein a final filter coefficient set used for the adaptive filtering is determined by iteratively estimating a plurality of filter coefficient sets by using data from a filtered picture to estimate a next filter coefficient set, the filtered picture filtered with a previously estimated filter coefficient set, and selecting an estimated filter coefficient set based on a determination that the estimated filter coefficient set has a quality improvement above a threshold value for the portion which has been estimated; and wherein only data from necessary regions and possible regions of said filtered picture are used to estimate a first filter coefficient set after the first estimation of the iterative estimation of the plurality of filter coefficient sets, and wherein said necessary and possible regions being determined using a reconstructed picture and a filtered picture.