Coding enhancement in cross-component sample adaptive offset

An electronic apparatus comprising:

• one or more processing units;
• a memory coupled to the one or more processing units;
• and
• a plurality of programs stored in the memory that, when executed by the one or more processing units, cause the electronic apparatus to perform acts comprising:
• receiving, from the video bitstream, a plurality of frames, each frame including a first component and a second component;
• determining, for a first frame of the plurality of frames, one or more classifiers for the second component respectively from one or more samples of the first component associated with a respective sample of the second component;
• receiving, from the video bitstream, a first group of sample offsets for the second component of the first frame according to the one or more classifiers;
• determining whether differential pulse-code modulation (DPCM) is enabled;
• in response to determining the DPCM being enabled:
• receiving, from the video bitstream, the first group of differential sample offsets for the second component of the second frame according to the one or more classifiers;
• and
• modifying a set of one or more samples of the second component of the second frame based on the first group of differential sample offsets of the second frame and the first group of sample offsets of the first frame.

A computer readable storage medium having stored therein a bitstream comprising video information to be decoded by acts comprising:

• receiving, from the video bitstream, a plurality of frames, each frame including a first component and a second component;
• determining, for a first frame of the plurality of frames, one or more classifiers for the second component respectively from one or more samples of the first component associated with a respective sample of the second component;
• receiving, from the video bitstream, a first group of sample offsets for the second component of the first frame according to the one or more classifiers;
• determining whether differential pulse-code modulation (DPCM) is enabled;
• in response to determining the DPCM being enabled:
• receiving, from the video bitstream, the first group of differential sample offsets for the second component of the second frame according to the one or more classifiers;
• and
• modifying a set of one or more samples of the second component of the second frame based on the first group of differential sample offsets of the second frame and the first group of sample offsets of the first frame.