METHODS AND APPARATUS FOR SUB-PICTURE ADAPTIVE RESOLUTION CHANGE
Methods and apparatus relate to picture and video coding in communication systems are provided. Included therein is a method comprising determining one or more layers associated with a parameter set, generating a syntax element including an indication indicating whether the one or more layers associated with the parameter set are independently coded, and generating a message including the syntax element.
1 - 21 . (canceled)
22 . A method comprising:
selectively including in a supplemental enhancement information (SEI) message sub-picture property information for use with adaptive switching of a viewport; and
including the SEI message in a bitstream.
23 . The method of claim 22 , further comprising:
identifying a set of sub-pictures associated with the viewport; and
identifying the sub-picture property information associated with the identified set of sub-pictures, wherein selectively including the sub-picture property information in the SEI message comprises:
generating the SEI message comprising the identified sub-picture property information.
24 . The method of claim 22 , wherein the sub-picture property information indicates or comprises any of: one or more layer identifications (IDs), one or more tile group IDs, a coordinate of each sub-picture, a position and a format of each sub-picture of a set of sub-pictures, mapping information for each sub-picture to be mapped onto a sphere coordinate space of the picture, a bit depth, color sub-sampling information, an encoding profile, or an encoding level for one or more sub-pictures.
25 . The method of claim 22 , wherein selectively including the sub-picture property information in the SEI message comprises:
generating a syntax to indicate the sub-picture property information in the SEI message.
26 . The method of claim 23 , wherein the set of sub-pictures is a set of tile groups associated with the picture.
27 . A method comprising:
receiving a supplemental enhancement information (SEI) message associated with a picture;
identifying a set of sub-pictures recommended to perform an Adaptive Resolution Change (ARC) based on one or more parameters indicated in the SEI message; and
selecting one or more sub-pictures from the set of sub-pictures to perform the ARC.
28 . The method of claim 27 , wherein the one or more parameters include any of:
a picture order count (POC) value for a high-resolution representation of the picture,
a POC value of a corresponding lower-resolution reference picture with a representation ID,
one or more scaling filter coefficients, or
a prediction method.
29 . The method of claim 28 , wherein the representation ID is a layer ID or a tile group ID.
30 . The method of claim 28 , wherein the prediction method includes any of: a temporal prediction and an inter-layer prediction.
31 . The method of claim 27 , wherein the SEI message includes a syntax.
32 . The method of claim 31 , wherein the syntax indicates information of a sub-picture of the set of sub-pictures, wherein the information includes any of: a layer ID, a POC value, and a sub-picture ID associated with the sub-picture.
33 . The method of claim 27 , wherein the SEI message includes a priority indicator indicating a priority of a respective sub-picture of the set of sub-pictures.
34 . The method of claim 33 , wherein the priority is a high priority that indicates a better ARC performance on the respective sub-picture.
35 . An apparatus comprising one or more processors configured to:
selectively include in a supplemental enhancement information (SEI) message sub-picture property information for use with adaptive switching of a viewport; and
include the SEI message in a bitstream.
36 . The apparatus of claim 35 , wherein the one or more processors are further configured to:
identify a set of sub-pictures associated with the viewport, and
identify the sub-picture property information associated with the identified set of sub-pictures, wherein selectively including the sub-picture property information in the SEI message comprises:
generate the SEI message comprising the identified sub-picture property information.
37 . The apparatus of claim 35 , wherein the sub-picture property information indicates or comprises any of: one or more layer identifications (IDs), one or more tile group IDs, a coordinate of each sub-picture, a position and a format of each sub-picture of a set of sub-pictures, mapping information for each sub-picture to be mapped onto a sphere coordinate space of the picture, a bit depth, color sub-sampling information, an encoding profile, or an encoding level for one or more sub-pictures.
38 . The apparatus of claim 35 , wherein the one or more processors are further configured to generate a syntax to indicate the sub-picture property information in the SEI message.
39 . The apparatus of claim 36 , wherein the set of sub-pictures is a set of tile groups associated with the picture.
40 . An apparatus comprising one or more processors configured to:
receive a supplemental enhancement information (SEI) message associated with a picture;
identify a set of sub-pictures recommended to perform an adaptive resolution change (ARC) based on one or more parameters indicated in the SEI message; and
select one or more sub-pictures from the set of sub-pictures to perform the ARC.
41 . The apparatus of claim 40 , wherein the one or more parameters include any of:
a picture order count (POC) value for a high-resolution representation of the picture,
a POC value of a corresponding lower-resolution reference picture with a representation ID,
one or more scaling filter coefficients, or
a prediction method.