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 method of decoding video data, the method comprising:
receiving a general constraints information syntax structure by using a present flag variable in a profile level tier syntax structure providing level information and general constraints information;
decoding a first syntax element specifying whether first constraint flags are present in the general constraints information syntax structure;
decoding the first constraint flags in the general constraints information syntax structure;
decoding a second syntax element specifying a length of additional flags in the general constraints information syntax structure; and
decoding second constraint flags in the general constraints information syntax structure in a case that (i) a value of the first syntax element is equal to a first value and (ii) a value of the second syntax element is greater than a second value, and otherwise not decoding the second constraint flags.
2. A device for decoding coded data, the device comprising:
a processor; and
a memory associated with the processor, wherein
the processor is configured to:
receive a general constraints information syntax structure by using a present flag variable in a profile level tier syntax structure providing level information and general constraints information;
decode a first syntax element specifying whether first constraint flags are present in the general constraints information syntax structure;
decode the first constraint flags in the general constraints information syntax structure;
decode a second syntax element specifying a length of additional flags in the general constraints information syntax structure; and
decode second constraint flags in the general constraints information syntax structure in a case that (i) a value of the first syntax element is equal to a first value and (ii) a value of the second syntax element is greater than a second value, and otherwise not decode the second constraint flags.
3. A device for encoding image data, the device comprising:
a processor; and
a memory associated with the processor, wherein
the processor is configured to:
signal a general constraints information syntax structure by using a present flag variable in a profile level tier syntax structure providing level information and general constraints information, and
the general constraints information syntax structure includes:
(i) a first syntax element specifying whether first constraint flags are present in the general constraints information syntax structure;
(ii) the first constraint flags in the general constraints information syntax structure;
(iii) a second syntax element specifying a length of additional flags in the general constraints information syntax structure; and
(iv) second constraint flags in the general constraints information syntax structure in a case that (i) a value of the first syntax element is equal to a first value and (ii) a value of the second syntax element is greater than a second value, and otherwise not includes the second constraint flags.