Sample adaptive offset control

A non-transitory computer readable medium containing instructions, that when executed by a processor, cause the processor to:

• decode an encoded video stream to produce reconstructed pixel data in a first color space and an indication of a second color space for sample-adaptive offset (SAO) filtering;
• when the second color space differs from the first color space,
• convert the reconstructed pixel data from the first color space to the second color space,
• SAO filter the reconstructed pixel data in the second color space, and
• convert the SAO filtered reconstructed pixel data from the second color space to the first color space;
• when the second color space does not differ from the first color space,
• SAO filter the reconstructed pixels in the first color space.

A system comprising:

• a video decoder including a sample adaptive offset (SAO) filter;
• a processing device;
• and
• a memory including instructions, that when executed by the processor device, cause the processing device to:
• process an encoded video stream to produce reconstructed pixel data in a first color space and an indication of a second color space for sample-adaptive offset (SAO) filtering;
• when the second color space differs from the first color space,
• convert the reconstructed pixel data from the first color space to the second color space,
• SAO filter the reconstructed pixel data in the second color space, and
• convert the SAO filtered reconstructed pixel data from the second color space to the first color space;
• when the second color space does not differ from the first color space,
• SAO filter the reconstructed pixels in the first color space.

A method for decoding video, comprising:

• decoding an encoded video stream to produce reconstructed pixel data in a first color space and an indication of a second color space for sample-adaptive offset_(SAO) filtering;
• when the second color space differs from the first color space,
• converting the reconstructed pixel data from the first color space to the second color space, and
• SAO filtering the reconstructed pixel data in the second color space;
• when the second color space does not differ from the first color space,
• SAO filtering the reconstructed pixels in the first color space.