Non-nested SEI messages in video coding

A video processing device comprising one or more processors configured to:

• obtain, from a bitstream of coded video data that includes a sequence of network abstraction layer (NAL) units, a non-nested Supplemental Enhancement Information (SEI) message, wherein the non-nested SEI message is not nested within a scalable nesting SEI message in the bitstream and the non-nested SEI message is not a buffering period SEI message, a picture timing SEI message, or a decoding unit information SEI message;
• determine a layer of the bitstream to which the non-nested SEI message is applicable, wherein the layer to which the non-nested SEI message is applicable is a layer for which video coding layer (VCL) NAL units of the bitstream have layer identifiers equal to a layer identifier specified in a SEI NAL unit that encapsulates the non-nested SEI message, and wherein a temporal identifier specified in the SEI NAL unit is required to be equal to a temporal identifier of an access unit containing the SEI NAL unit;
• and
• process, based in part on data in the non-nested SEI message, video data of the layer of the bitstream to which the non-nested SEI message is applicable.

A video processing device comprising:

• means for obtaining, from a bitstream of coded video data that includes a sequence of network abstraction layer (NAL) units, a non-nested Supplemental Enhancement Information (SEI) message, wherein the non-nested SEI message is not nested within a scalable nesting SEI message in the bitstream and the non-nested SEI message is not a buffering period SEI message, a picture timing SEI message, or a decoding unit information SEI message;
• means for determining a layer of the bitstream to which the non-nested SEI message is applicable, wherein the layer to which the non-nested SEI message is applicable is a layer for which video coding layer (VCL) NAL units of the bitstream have layer identifiers equal to a layer identifier specified in a SEI NAL unit that encapsulates the non-nested SEI message, and wherein a temporal identifier specified in the SEI NAL unit is required to be equal to a temporal identifier of an access unit containing the SEI NAL unit;
• and
• means for processing, based in part on data in the non-nested SEI message, video data of the layer of the bitstream to which the non-nested SEI message is applicable.

A computer-readable storage medium having instructions stored thereon that, when executed, configure a video processing device to:

• obtain, from a bitstream of coded video data that includes a sequence of network abstraction layer (NAL) units, a non-nested Supplemental Enhancement Information (SEI) message, wherein the non-nested SEI message is not nested within a scalable nesting SEI message in the bitstream and the non-nested SEI message is not a buffering period SEI message, a picture timing SEI message, or a decoding unit information SEI message;
• determine a layer of the bitstream to which the non-nested SEI message is applicable, wherein the layer to which the non-nested SEI message is applicable is a layer for which video coding layer (VCL) NAL units of the bitstream have layer identifiers equal to a layer identifier specified in a SEI NAL unit that encapsulates the non-nested SEI message, and wherein a temporal identifier specified in the SEI NAL unit is required to be equal to a temporal identifier of an access unit containing the SEI NAL unit;
• and
• process, based in part on data in the non-nested SEI message, video data of the layer of the bitstream to which the non-nested SEI message is applicable.