Signaling layer identifiers for operation points in video coding

A method of encoding video data, the method comprising:

• encoding a bitstream of video data such that the bitstream is a conforming bitstream,
• wherein non-conforming bitstreams include syntax elements in a video parameter set (VPS) that duplicate content for hypothetical reference decoder (HRD) parameter information for different operation points,
• wherein the conforming bitstream does not include any syntax elements in the VPS that duplicate the content for the HRD parameter information for the different operation points, and
• wherein encoding the bitstream comprises:
• encoding first syntax elements within the conforming bitstream, the first syntax elements indicating first HRD parameter information;
• and
• encoding second syntax elements in the VPS within the conforming bitstream, the second syntax elements indicating second HRD parameter information that is different from the first HRD parameter information.

A video coding device comprising:

• a memory configured to store video data of one or more bitstreams;
• and
• a video coder configured to:
• code a conforming bitstream, wherein a determination of whether the bitstream is conforming is defined such that:
• bitstreams that include syntax elements in a video parameter set (VPS) that duplicate hypothetical reference decoder (HRD) parameter information for different operation points are determined to be non-conforming bitstreams, and
• bitstreams that do not include any syntax elements in the VPS that duplicate the HRD parameter information for the different operation points are determined to be conforming bitstreams, and
• wherein to code the conforming bitstream, the video coder is configured to:
• code first syntax elements in the VPS within a conforming bitstream, the first syntax elements indicating first HRD parameter information;
• and
• code, if present, second syntax elements in the VPS within the conforming bitstream, the second syntax elements indicating second HRD parameter information that is different from the first HRD parameter information.

A non-transitory computer-readable storage medium having stored thereon instructions that, when executed, cause a processor of a device for coding video data to:

• code a conforming bitstream, wherein a determination of whether the bitstream is conforming is defined such that:
• bitstreams that include syntax elements in a video parameter set (VPS) that duplicate hypothetical reference decoder (HRD) parameter information for different operation points are determined to be non-conforming bitstreams, and
• bitstreams that do not include any syntax elements in the VPS that duplicate the HRD parameter information for the different operation points are determined to be conforming bitstreams, and wherein the instructions that cause the processor to code the conforming bitstream include instructions that, when executed, cause the processor to:
• code first syntax elements in the VPS within a conforming bitstream, the first syntax elements indicating first HRD parameter information;
• and
• code, if present, second syntax elements in the VPS within the conforming bitstream, the second syntax elements indicating second HRD parameter information that is different from the first HRD parameter information.

A video coding device comprising:

• means for coding a conforming bitstream, wherein a determination of whether the bitstream is conforming is defined such that:
• bitstreams that include syntax elements in a video parameter set (VPS) that duplicate hypothetical reference decoder (HRD) parameter information for different operation points are determined to be non-conforming bitstreams, and
• bitstreams that do not include any syntax elements in the VPS that duplicate the HRD parameter information for the different operation points are determined to be conforming bitstreams, and wherein the means for coding the conforming bitstream includes:
• means for coding first syntax elements in the VPS within a conforming bitstream, the first syntax elements indicating first HRD parameter information;
• and
• means for coding, if present, second syntax elements in the VPS within the conforming bitstream, the second syntax elements indicating second HRD parameter information that is different from the first HRD parameter information.