Patent ID: 9055305
Filing Date: 2015-06-09
Classification: H04N

Abstract:
1. A method for decoding of a video bitstream generated by a video coding system with sample adaptive offset (SAO), the method comprising: receiving video bitstream; deriving processed video data from the video bitstream; partitioning the processed video data into regions, wherein each of the regions is smaller than a picture; deriving a region-based SAO type from the video bitstream for each of the regions, wherein the region-based SAO type is allowed to vary from one region to another region; determining a category from a group of categories associated with the region-based SAO type for each of pixels in said each of the regions; deriving intensity offset from the video bitstream for the category associated with the region-based SAO type; and applying sample adaptive offset compensation to said each of the pixels in the region of the processed video data based on the intensity offset for the category of the region-based SAO type selected; and wherein a higher-level SAO enabling flag is derived from the video bitstream in a sequence level, picture level or slice level to indicate whether the sample adaptive offset compensation is enabled or disabled for higher-level video data, when the higher-level SAO enabling flag indicates that the sample adaptive offset compensation is enabled, a lower-level SAO flag is derived from the video bitstream for lower-level video data to determine whether the sample adaptive offset compensation is On or Off for the lower-level video data, and when the higher-level SAO enabling flag indicates that the sample adaptive offset compensation is disabled, the sample adaptive offset compensation is Off for the lower-level video data within the sequence level, the picture level or the slice level.