Dynamic adaptation of volumetric content component sub-bitstreams in streaming services
A media content processing device may decode visual volumetric content based on one or more messages, which may indicate which attribute sub-bitstream of one or more attribute sub-bitstreams indicated in a parameter set is active. The parameter set may include a visual volumetric video-based parameter set. The message indicating one or more active attribute sub-bitstreams may be received by the decoder. A decoder may perform decoding, such as determining which attribute sub-bitstream to use for decoding visual media content, based on the one or more messages. The one or more messages may be generated and sent to a decoder, for example, to indicate the deactivation of the one or more attribute sub-bitstreams. The decoder may determine an inactive attribute sub-bitstream and skip the inactive attribute sub-bitstream for decoding the visual media content based on the one or more messages.
1 . An apparatus for decoding media content, comprising one or more processors, wherein the one or more processors are configured to:
obtain a parameter set associated with visual volumetric content;
receive a supplemental enhancement information (SEI) message that indicates which subset of a plurality of attribute sub-bitstreams indicated in the parameter set is active, wherein the subset of the plurality of attribute sub-bitstreams comprises at least one attribute sub-bitstream;
determine an active attribute sub-bitstream based on the SEI message; and
decode the visual volumetric content using the active attribute sub-bitstream.
2 . The apparatus of claim 1 , wherein the one or more processors are further configured to:
determine an inactive attribute sub-bitstream based on the SEI message; and
determine to skip decoding of the inactive attribute sub-bitstream, wherein the visual volumetric content is decoded based on the determination to skip the decoding of the inactive attribute sub-bitstream.
3 . The apparatus of claim 1 , wherein the SEI message is signaled in a bitstream, and the one or more processors are further configured to receive the bitstream that comprises the SEI message.
4 . The apparatus of claim 1 , wherein the SEI message has a persistence scope that persists until an end of a bitstream.
5 . The apparatus of claim 1 , wherein the SEI message is a first SEI message, and the first SEI message has a persistence scope that persists until a second SEI message that is different from the first SEI message is received.
6 . The apparatus of claim 1 , wherein the SEI message comprises an indicator that indicates a number of active attribute sub-bitstreams in the subset.
7 . The apparatus of claim 1 , wherein the parameter set comprises a visual volumetric video-based parameter set (VPS) that comprises attribute information for the plurality of attribute sub-bitstreams, and wherein the SEI message refers to a subset of the attribute information associated with the subset of the plurality of attribute sub-bitstreams.
8 . The apparatus of claim 1 , wherein the SEI message comprises an attribute index for the at least one attribute sub-bitstream.
9 . The apparatus of claim 1 , wherein the SEI message indicates whether there is an activation change for an attribute sub-bitstream of the plurality of attribute sub-bitstreams.
10 . The apparatus of claim 1 , wherein an attribute sub-bitstream that is indicated in the parameter set but not indicated in the SEI message is determined to be an inactive attribute sub-bitstream, and wherein the inactive attribute sub-bitstream is skipped for the decoding of the visual volumetric content.
11 . The apparatus of claim 1 , wherein the parameter set indicates map information associated with a respective attribute sub-bitstream of the plurality of attribute sub-bitstreams, wherein the SEI message indicates active map information of the active attribute sub-bitstream, and wherein the visual volumetric content is decoded using the active map information.
12 . An apparatus for encoding media content, comprising one or more processors, wherein the one or more processors are configured to:
determine that a subset of a plurality of attributes associated with visual volumetric content is active;
encode an attribute sub-bitstream associated with an attribute of the subset of the plurality of attributes;
include, in a bitstream, the attribute sub-bitstream associated with the attribute of the subset of the plurality of attributes; and
send a supplemental enhancement information (SEI) message to indicate that the attribute sub-bitstream is active.
13 . A method for decoding media content, comprising:
obtaining a parameter set associated with visual volumetric content;
receiving a supplemental enhancement information (SEI) message that indicates which subset of a plurality of attribute sub-bitstreams indicated in the parameter set is active, wherein the subset of the plurality of attribute sub-bitstreams comprises at least one attribute sub-bitstream;
determining an active attribute sub-bitstream based on the SEI message; and
decoding the visual volumetric content using the active attribute sub-bitstream.
14 . The method of claim 13 , comprising:
determining an inactive attribute sub-bitstream based on the SEI message; and
determining to skip decoding of the inactive attribute sub-bitstream, wherein the visual volumetric content is decoded based on the determination to skip the decoding of the inactive attribute sub-bitstream.
15 . The method of claim 13 , wherein the SEI message is signaled in a bitstream, and the method further comprises receiving the bitstream that comprises the SEI message.
16 . The method of claim 13 , wherein the SEI message has a persistence scope that persists until an end of a bitstream.
17 . The method of claim 13 , wherein the SEI message is a first SEI message, and the first SEI message has a persistence scope that persists until a second SEI message that is different from the first SEI message is received.
18 . The method of claim 13 , wherein the SEI message comprises an indicator that indicates a number of active attribute sub-bitstreams in the subset.
19 . The method of claim 13 , wherein the parameter set comprises a visual volumetric video-based parameter set (VPS) that comprises attribute information for the plurality of attribute sub-bitstreams, and wherein the SEI message refers to a subset of the attribute information associated with the subset of the plurality of attribute sub-bitstreams.
20 . The method of claim 13 , wherein the SEI message comprises an attribute index for the at least one attribute sub-bitstream.