Method and apparatus for generating and processing media file
Disclosed are a method and device for transmitting/receiving a downlink channel from multiple transmission/reception points in a wireless communication system. A method for a terminal to receive a downlink channel in a wireless communication system according to an embodiment of the present disclosure comprises the steps of: receiving a downlink control channel on the basis of two or more transmission configuration indicator (TCI) states associated with one or more control resource sets (CORESETs); and receiving a downlink data channel on the basis of the two or more TCI states associated with one or more CORESETs, on the basis of TCI information not being included in downlink control information (DCI) received through the downlink control channel, wherein the two or more TCI states may be mapped to the downlink data channel on the basis of a prescribed mapping scheme.
1. A method for generating a media file including video information, the method comprising:
storing at least one of network adaptation layer (NAL) units including the video information in a track of a file format;
configuring a syntax of an operating point entity group in the file format, wherein the syntax of the operating point entity group includes information for the operation points; and
generating the media file based on the file format,
wherein the syntax of the operating point entity group includes flag information indicating whether a list of layers that belong to an output layer set related to the syntax of the operating point entity group is present or not, and
wherein based on a value of the flag information being equal to 1, the syntax of the operating point entity group includes information for specifying whether each layer in the output layer set is an output layer.
2. The method of claim 1 , wherein the flag information is present for a specific output layer set in the operating point entity group.
3. The method of claim 2 , wherein based on the value of the flag information being equal to 1, the list of layers for the specific output layer set is present, and
wherein based on the value of the flag information being equal to 0, the list of layers for the specific output layer set is not present.
4. The method of claim 1 , wherein the syntax of the operating point entity group includes information for a number of operating points.
5. The method of claim 1 , wherein the syntax of the operating point entity group includes flag information indicating whether frame rate related information is present for the operating points, and
wherein based on the value of the flag information being equal to 1, the syntax of the point entity group includes information for an average frame rate for the operating points and information for a constant frame rate for the operating points.
6. A media file generation device, comprising:
a memory; and
at least one processor connected to the memory, wherein the at least one processor is configured to:
store at least one of network adaptation layer (NAL) units including video information in a track of a file format;
configure a syntax of an operating point entity group in the file format, wherein the syntax of the operating point entity group includes information for the operating points; and
generate the media file based on the file format,
wherein the syntax of the operating point entity group includes flag information indicating whether a list of layers that belong to an output layer set related to the syntax of the operating point entity group is present or not, and
wherein based on a value of the flag information being equal to 1, the syntax of the operating point entity group includes information for specifying whether each layer in the output layer set is an output layer.
7. A method for processing a media file including video information, the method comprising:
parsing at least one of network adaptation layer (NAL) units including the video information in a track of a file format from the media file; and
parsing a syntax of an operating point entity group in the file format, wherein the syntax of the operating point entity group includes information for the operation points,
wherein the syntax of the operating point entity group includes flag information indicating whether a list of layers that belong to an output layer set related to the syntax of the operating point entity group is present or not, and
wherein based on a value of the flag information being equal to 1, the syntax of the operating point entity group includes information for specifying whether each layer in the output layer set is an output layer.
8. The method of claim 7 , wherein the flag information is present exists for a specific output layer set in the operating point entity group.
9. The method of claim 8 , wherein based on the value of the flag information being equal to 1, the list of layers for the specific output layer set is present, and
wherein based on the value of the flag information being equal to 0, the list of layers for the specific output layer set is not present.
10. The method of claim 7 , wherein the syntax of the operating point entity group includes information for a number of operating points.
11. The method of claim 7 , wherein the syntax of the operating point entity group includes flag information indicating whether frame rate related information is present for the operating points, and
wherein based on the value of the flag information being equal to 1, the syntax of the operating point entity group includes information for an average frame rate for the operating points and information for a constant frame rate for the operating points.
12. A media file processing device, comprising:
a memory; and
at least one processor connected to the memory, wherein the at least one processor is configured to:
parse at least one of network adaptation layer (NAL) units including video information in a track of a file format from the media file; and
parse a syntax of an operating point entity group in the file format, wherein the syntax of the operating point entity group includes information for the operating points,
wherein the syntax of the operating point entity group includes flag information indicating whether a list of layers that belong to an output layer set related to the syntax of the operating point entity group is present or not, and
wherein based on a value of the flag information being equal to 1, the syntax of the operating point entity group includes information for specifying whether each layer in the output layer set is an output layer.