Apparatus and Method of Sample Adaptive Offset for Luma and Chroma Components

Abstract

A method and apparatus for processing reconstructed video using in-loop filter in a video coding system are disclosed. The method uses chroma in-loop filter indication to indicate whether chroma components are processed by in-loop filter when the luma in-loop filter indication indicates that in-loop filter processing is applied to the luma component. An additional flag may be used to indicate whether the in-loop filter processing is applied to an entire picture using same in-loop filter information or each block of the picture using individual in-loop filter information. Various embodiments according to the present invention to increase efficiency are disclosed, wherein various aspects of in-loop filter information are taken into consideration for efficient coding such as the property of quadtree-based partition, boundary conditions of a block, in-loop filter information sharing between luma and chroma components, indexing to a set of in-loop filter information, and prediction of in-loop filter information.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]The present invention claims priority to U.S. Provisional Patent Application No. 61 / 486,504, filed May 16, 2011, entitled “Sample Adaptive Offset for Luma and Chroma Components”, U.S. Provisional Patent Application No. 61 / 498,949, filed Jun. 20, 2011, entitled “LCU-based Syntax for Sample Adaptive Offset”, and U.S. Provisional Patent Application No. 61 / 503,870, filed Jul. 1, 2011, entitled “LCU-based Syntax for Sample Adaptive Offset”. The present invention is also related to U.S. Non-Provisional patent application Ser. No. 13 / 158,427, entitled “Apparatus and Method of Sample Adaptive Offset for Video Coding”, filed on Jun. 12, 2011. The U.S. Provisional Patent Applications and U.S. Non-Provisional patent application are hereby incorporated by reference in their entireties.FIELD OF THE INVENTION[0002]The present invention relates to video processing. In particular, the present invention relates to apparatus and method for adaptive in-loop...

AI Technical Summary

Benefits of technology

The patent describes a method and apparatus for processing reconstructed video using an in-loop filter in a video decoder. The in-loop filter is applied to the video data, which includes luma and chroma components. The method involves deriving the in-loop filter information from the video bitstream and applying the in-loop filter processing to the chroma components based on the chroma in-loop filter indication. The in-loop filter information can be shared between luma and chroma components, and the coding efficiency can be increased by predicting the in-loop filter information and using merge flags to indicate the sharing of in-loop filter information with neighboring blocks. The technical effect of this patent is to improve the coding efficiency of video data and provide better video quality.

Problems solved by technology

Intensity shift may cause visual impairment or artifacts, which is especially more noticeable when the intensity shift varies from frame to frame.

Images