Texas Instruments Incorporated
METHOD AND APPARATUS FOR SAMPLE ADAPTIVE OFFSET WITHOUT SIGN CODING

Abstract:

A method and apparatus for sample adaptive offset without sign coding. The method includes selecting an edge offset type for at least a portion of an image, classifying at least one pixel of at least the portion of the image into edge shape category, calculating an offset of the pixel, determining the offset is larger or smaller than a predetermined threshold, changing a sign of the offset based on the threshold determination; and performing entropy coding accounting for the sign of the offset and the value of the offset.