Optimized Sample Adaptive Offset Filter in HEVC

Abstract

Te high-efciency video coding (HEVC) standard incorporates sample adaptive ofset (SAO) as an in-loop fltering technique to reduce distortion. Te fundamental tenet of SAO is to classify every reconstructed pixel and then simply add the ofset to each group of pixels. Te previous existing technique employs 32 bands in band ofset (BO) calculation to determine the proper ofset value to minimize the distortion in the SAO estimate algorithm for statistics collection and parametric determination procedure. Te suggested method will reduce the necessary band count by 16 bands. It does not alter how edge ofset is determined in any way. It ofers enough and efcient room for creating superior band group predictions and selections, as well as an ideal decrease in the implemented area. Tus, reducing the number of bands to 16 also decreases the amount of storage needed to hold each pixel’s information in binary fles by up to 0.65%.