Systems and methods for signaling general constraint information in video coding
A device may be configured to general constraint information according to one or more of the techniques described herein.
1. A decoding device for decoding video data, the decoding device comprising:
a processor, and
a memory associated with the processor; wherein the processor is configured to receive a profile tier level syntax structure providing level information and general constraints information,
wherein:
the profile tier level syntax structure includes a first syntax element indicating a level to which a video sequence conforms,
the first syntax element is aligned as a first byte of the profile tier level syntax structure in a case that a value of a profile tier present flag is equal to 0,
the first syntax element is aligned as a second byte of the profile tier level syntax structure in a case that the value of the profile tier present flag is equal to 1,
the profile tier level syntax structure includes a general constraints information syntax structure, which is present after the second byte of the profile tier level syntax structure in the case that the value of the profile tier present flag is equal to 1, and
the general constraints information syntax structure includes a second syntax element indicating whether additional syntax elements are present in the general constraints information syntax structure.
2. An encoding device for encoding video data, the encoding device comprising:
a processor, and
a memory associated with the processor; wherein the processor is configured to signal a profile tier level syntax structure providing level information and general constraints information,
wherein:
the profile tier level syntax structure includes a first syntax element indicating a level to which a video sequence conforms,
the first syntax element is aligned as a first byte of the profile tier level syntax structure in a case that a value of a profile tier present flag is equal to 0,
the first syntax element is aligned as a second byte of the profile tier level syntax structure in a case that the value of the profile tier present flag is equal to 1,
the profile tier level syntax structure includes a general constraints information syntax structure, which is present after the second byte of the profile tier level syntax structure in the case that the value of the profile tier present flag is equal to 1, and
the general constraints information syntax structure includes a second syntax element indicating whether additional syntax elements are present in the general constraints information syntax structure.
3. A decoding method for decoding video data, the decoding method including:
receiving a profile tier level syntax structure providing level information and general constraints information,
wherein:
the profile tier level syntax structure includes a first syntax element indicating a level to which a video sequence conforms,
the first syntax element is aligned as a first byte of the profile tier level syntax structure in a case that a value of a profile tier present flag is equal to 0,
the first syntax element is aligned as a second byte of the profile tier level syntax structure in a case that the value of the profile tier present flag is equal to 1,
the profile tier level syntax structure includes a general constraints information syntax structure, which is present after the second byte of the profile tier level syntax structure in the case that the value of the profile tier present flag is equal to 1, and
the general constraints information syntax structure includes a second syntax element indicating whether additional syntax elements are present in the general constraints information syntax structure.