Patent ID: 11917179
Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A non-transitory computer readable medium storing a bitstream containing information according to which a decoder performs a decoding process, the information including a first flag indicating whether a CCALF (cross component adaptive loop filtering) process is enabled for a first block located adjacent to a left side of a current block, and a second flag indicating whether the CCALF process is enabled for a second block located adjacent to an upper side of the current block, wherein in the decoding process:
the first flag indicating whether the CCALF process is enabled for the first block is parsed from the bitstream;
the second flag indicating whether the CCALF process is enabled for the second block is parsed from the bitstream;
a value of a first index is set to 0;
a second index is derived using an equation that is a function of the first flag, the second flag, and the first index, the equation being used to derive a third index indicating a context model for an ALF (adaptive loop filtering) control flag;
a third flag is generated using the second index, the third flag indicating whether or not the CCALF process enabled for the current block; and
the CCALF process is performed on the current block in response to the third flag indicating the CCALF process is enabled for the current block.