TECHNIQUES FOR MULTIPLE CONFORMANCE POINTS IN MEDIA CODING

1 . A method for media decoding, the method comprising:

decoding, in a syntax structure, a first indication, said first indication being an ITU-T Rec. T.35 string indicative of a first sub-profile that identifies a first defined set of tools capable of being used by an encoder to encode a video sequence to generate a coded video sequence that conforms to the first sub-profile and capable of being used by a decoder to decode the coded video sequence that conforms to the first sub-profile,

wherein the syntax structure includes a syntax element that indicates a number of sub-profiles, and includes a list of the sub-profiles in a form of a loop with a fixed number of iterations;

decoding, in the syntax structure, a second indication, said second indication being an ITU-T Rec. T.35 string, indicative of a second sub-profile that identifies a second defined set of tools capable of being used by the encoder to encode the video sequence to generate the coded video sequence that conforms to the second sub-profile and capable of being used by the decoder to decode the coded video sequence that conforms to the second sub-profile; and

selectively decoding the coded video sequence based on the first indication and the second indication.

2 . The method of claim 1 , wherein the method further comprises identifying a conformance point based on the first indication and the second indication, and

comparing the conformance point and capability information of the decoder.

3 . The method of claim 1 , wherein the first indication is coded as an octet string of at least sixteen octets in length, and the first indication is a sub-profile of the second indication.

4 . The method of claim 1 , wherein a media bitstream conforms to both of the first sub-profile and the second sub-profile.

5 . The method of claim 1 , wherein the first indication is present in a first high level syntax structure and the second indication is present in a second high level syntax structure.

6 . The method of claim 5 , wherein the first high level syntax structure is different than the second high level syntax structure.

7 . A device for media encoding, comprising:

at least one memory configured to store program code; and

at least one processor configured to read the program code and operate as instructed by the program code, the program code including:

first signaling code configured to cause the at least one processor to signal, in a syntax structure, a first indication, said first indication being an ITU-T Rec. T.35 string, indicative of a first sub-profile that identifies a first defined set of tools capable of being used by an encoder to encode a video sequence to generate a coded video sequence that conforms to the first sub-profile and capable of being used by a decoder to decode the coded video sequence that conforms to the first sub-profile,

wherein the syntax structure includes a syntax element that indicates a number of sub-profiles, and includes a list of the sub-profiles in a form of a loop with a fixed number of iterations;

second signaling code configured to cause the at least one processor to signal, in the syntax structure, a second indication, said second indication being an ITU-T Rec. T.35 string, indicative of a second sub-profile that identifies a second defined set of tools capable of being used by the encoder to encode the video sequence to generate the coded video sequence that conforms to the second sub-profile and capable of being used by the decoder to decode the coded video sequence that conforms to the second sub-profile; and

providing code configured to cause the at least one processor to encode the video sequence based on the first indication and the second indication.

8 . The device of claim 7 , wherein the program code further comprises identifying code configured to cause the at least one processor to identify a conformance point based on the first indication and the second indication.

9 . The device of claim 8 , wherein the program code further comprises comparing code configured to cause the at least one processor to compare the conformance point and capability information of the encoder.

10 . The device of claim 7 , wherein the first indication is coded as an octet string of at least sixteen octets in length, and the first indication is a sub-profile of the second indication.

11 . The device of claim 7 , wherein a media bitstream conforms to both of the first sub-profile and the second sub-profile.

12 . The device of claim 7 , wherein the first indication is present in a first high level syntax structure and the second indication is present in a second high level syntax structure.

13 . The device of claim 12 , wherein the first high level syntax structure is different than the second high level syntax structure.

14 . A non-transitory computer-readable medium storing instructions, the instructions comprising:

one or more instructions that, when executed by one or more processors of a device, cause the one or more processors to:

perform a conversion between a visual media file and a bitstream of a visual media data according to a format rule,

wherein the bitstream comprises a syntax structure that comprises a syntax element that indicates a number of sub-profiles and a list of the sub-profiles in a form of a loop with a fixed number of iterations;

wherein the syntax structure in the bitstream comprises a first indication, said first indication being an ITU-T Rec. T.35 string, indicative of a first sub-profile that identifies a first defined set of tools capable of being used by an encoder to encode a video sequence to generate a coded video sequence that conforms to the first sub-profile and capable of being used by a decoder to decode the coded video sequence that conforms to the first sub-profile;

wherein the syntax structure in the bitstream comprises a second indication, said second indication being an ITU-T Rec. T.35 string, indicative of a second sub-profile that identifies a second defined set of tools capable of being used by the encoder to encode the video sequence to generate the coded video sequence that conforms to the second sub-profile and capable of being used by the decoder to decode the coded video sequence that conforms to the second sub-profile; and

wherein the format rule comprises rules for selectively encoding or selectively decoding the video sequence based on the first indication and the second indication.

15 . The non-transitory computer-readable medium of claim 14 , wherein the one or more instructions further cause the one or more processors to identify a conformance point based on the first indication and the second indication.

16 . The non-transitory computer-readable medium of claim 15 , wherein the one or more instructions further cause the one or more processors to compare the conformance point and capability information of the decoder or the encoder.

17 . The non-transitory computer-readable medium of claim 14 , wherein the first indication is coded as an octet string of at least sixteen octets in length, and the first indication is a sub-profile of the second indication.

18 . The non-transitory computer-readable medium of claim 14 , wherein a media bitstream conforms to both of the first sub-profile and the second sub-profile.

19 . The non-transitory computer-readable medium of claim 14 , wherein the first indication is present in a first high level syntax structure and the second indication is present in a second high level syntax structure,

20 . The non-transitory computer-readable medium of claim 19 , wherein the first high level syntax structure is different than the second high level syntax structure.