Generic use of HEVC SEI messages for multi-layer codecs

1. A method of coding video data, the method comprising:

coding one or more non-video coding layer (VCL) network abstraction layer (NAL) units of a layer of a multi-layer bitstream, wherein the one or more non-VCL NAL units contain a non-nested decoded picture hash SEI message;

coding one or more syntax elements that indicate a layer identifier of the one or more non-VCL NAL units; and

determining a set of layers of the multi-layer bitstream to which the non-nested decoded picture hash SEI message is applicable based on the one or more syntax elements that indicate the layer identifier of the one or more non-VCL NAL units containing the non-nested decoded picture hash SEI message.

2. The method of claim 1 , further comprising:

coding a picture of the layer included in the set of layers; and

checking the picture for errors using the non-nested decoded picture hash SEI message.

3. The method of claim 1 , further comprising:

coding one or more second non-VCL NAL units of the multi-layer bitstream, wherein the one or more second non-VCL NAL units contain an active parameter sets SEI message; and

determining that the active parameter sets SEI message is applicable to all layers of the multi-layer bitstream based on the one or more second non-VCL NAL units containing the active parameter set SEI message.

4. The method of claim 3 , wherein coding the one or more second non-VCL NAL units containing the active parameter sets SEI message comprises only coding a non-nested SEI message.

5. The method of claim 1 , further comprising:

coding one or more syntax elements indicating that frame field information is present in a picture timing SEI message of the multi-layer bitstream; and

applying the frame field information to all layers in all operation points to which the picture timing SEI message applies.

6. The method of claim 1 , further comprising:

coding the determined set layers of the multi-layer bitstream;

using the non-nested decoded picture hash message to determine whether the determined set of layers include one or more errors.

7. The method of claim 6 , wherein coding comprises encoding, and wherein encoding the determined set of layers comprises:

generating residual data for the determined set of layers indicating a difference between predictive data and actual video data;

applying a transform to the residual data the generate transform coefficients; and

generating a bitstream that includes an indication of the transform coefficients.

8. The method of claim 1 , wherein coding comprises decoding, and wherein decoding the determined set of layers comprises:

obtaining transform coefficients for the determined set of layers from an encoded bitstream;

applying an inverse transform to the transform coefficients to generate residual data; and

determining the video data based on the generated residual data.

9. A device for coding video data, the device comprising:

a memory configured to store at least a portion of a multi-layer bitstream; and

one or more processors configured to:

code one or more non-video coding layer (VCL) network abstraction layer (NAL) units of a layer of a multi-layer bitstream, wherein the one or more non-VCL NAL units contain a non-nested decoded picture hash SEI message;

code one or more syntax elements that indicate a layer identifier of the one or more non-VCL NAL units; and

determine a set of layers of the multi-layer bitstream to which the non-nested decoded picture hash SEI message is applicable based on the one or more syntax elements that indicate the layer identifier of the one or more non-VCL NAL units containing the non-nested decoded picture hash SEI message.

10. The device of claim 9 , wherein the one or more processors are further configured to:

code a picture of the layer included in the set of layers; and

check the picture for errors using the non-nested decoded picture hash SEI message.

11. The device of claim 9 , wherein the one or more processors are further configured to:

code one or more second non-VCL NAL units of the multi-layer bitstream, wherein the one or more second non-VCL NAL units contain an active parameter sets SEI message; and

determine that the active parameter sets SEI message is applicable to all layers of the multi-layer bitstream based on the one or more second non-VCL NAL units containing the active parameter set SEI message.

12. The device of claim 11 , wherein to code the one or more second non-VCL NAL units containing the active parameter sets SEI message, the one or more processors are configured to only code a non-nested SEI message.

13. The device of claim 9 , wherein the one or more processors are further configured to:

code one or more syntax elements indicating that frame field information is present in a picture timing SEI message of the multi-layer bitstream; and

apply the frame field information to all layers in all operation points to which the picture timing SEI message applies.

14. The device of claim 9 , wherein the one or more processors are further configured to:

code the determined set layers of the multi-layer bitstream;

use the non-nested decoded picture hash message to determine whether the determined set of layers include one or more errors.

15. The device of claim 14 , wherein coding comprises encoding, and wherein to encode the determined set of layers, the one or more processors are configured to:

generate residual data for the determined set of layers indicating a difference between predictive data and actual video data;

apply a transform to the residual data the generate transform coefficients; and

generate a bitstream that includes an indication of the transform coefficients.

16. The device of claim 9 , wherein coding comprises decoding, and wherein to decode the determined set of layers, the one or more processors are configured to:

obtain transform coefficients for the determined set of layers from an encoded bitstream;

apply an inverse transform to the transform coefficients to generate residual data; and

determine the video data based on the generated residual data.

17. The device of claim 9 , wherein the device comprises at least one of:

an integrated circuit;

a microprocessor; or

a wireless communication device.

18. An apparatus for coding video data, the apparatus comprising:

means for coding one or more non-video coding layer (VCL) network abstraction layer (NAL) units of a layer of a multi-layer bitstream, wherein the one or more non-VCL NAL units contain a non-nested decoded picture hash SEI message;

means for coding one or more syntax elements that indicate a layer identifier of the one or more non-VCL NAL units; and

means for determining a set of layers of the multi-layer bitstream to which the non-nested decoded picture hash SEI message is applicable based on the one or more syntax elements that indicate the layer identifier of the one or more non-VCL NAL units containing the non-nested decoded picture hash SEI message.

19. The apparatus of claim 18 , further comprising:

means for coding the picture of a layer included in the set of layers; and

means for checking the picture for errors using the non-nested decoded picture hash SEI message.

20. A non-transitory computer-readable medium having instructions stored thereon that, when executed, cause one or more processors to:

code one or more non-video coding layer (VCL) network abstraction layer (NAL) units of a layer of a multi-layer bitstream, wherein the one or more non-VCL NAL units contain a non-nested decoded picture hash SEI message;

code one or more syntax elements that indicate a layer identifier of the one or more non-VCL NAL units; and

determine a set of layers of the multi-layer bitstream to which the non-nested decoded picture hash SEI message is applicable based on the one or more syntax elements that indicate the layer identifier of the one or more non-VCL NAL units containing the non-nested decoded picture hash SEI message.

21. The non-transitory computer-readable medium of claim 20 , wherein the instructions further cause the one or more processors to:

code a picture of the layer included in the set of layers; and

check the picture for errors using the non-nested decoded picture hash SEI message.