Devices and methods for signaling sample adaptive offset (SAO) parameters

摘要

Systems and methods that improve video quality by signaling of parameters in a sample adaptive offset (SAO) process are disclosed. The methods and systems described herein generally pertain to video processing such as video encoders and decoders.

主权项

1. A method for sample adaptive offset (SAO) filtering and SAO parameter signaling in a video encoder, the method comprising:
determining SAO parameters for largest coding units (LCUs) of a reconstructed picture using a merge flag by:
copying SAO parameters for all color components of a current LCU from corresponding color components of a left neighboring LCU if the merge flag indicates to use merge and a left neighboring LCU is available;copying SAO parameters for one or more color components of the current LCU from corresponding color components of the above neighboring LCU if the merge flag indicates to use merge and the left neighboring LCU is not available; andif the merge flag does not indicate to use merge, explicitly signaling SAO parameters for each luminance and chrominance color component of the current LCU using a luminance merge flag and at least one chrominance merge flag; and applying SAO filtering to the reconstructed picture according to the SAO parameters.