Method and device for generating/receiving media file including NAL unit array information, and method for transmitting media file
A method and apparatus for generating/receiving a media file including NAL unit array information, and a method for transmitting the media file are provided. A method for receiving a media file, according to the present disclosure, comprises the steps of: acquiring, from a decoder setting record within a media file, first information indicating whether a network abstraction layer (NAL) unit of a predetermined type can be present within a stream of video data; and processing the video data on the basis of the first information, wherein, on the basis of a sample entry, which transports the NAL unit array of the predetermined type, being a WC sample entry, the first information is limited to have a predetermined value with respect to the NAL unit array of the predetermined type and can be permitted to have a value other than the predetermined value with respect to a NAL unit array of a type differing from the predetermined type.
1 . A media file receiving method performed by a media file receiving apparatus for receiving a media file of a predetermined format including video data, the media file receiving method comprising:
obtaining first information indicating whether a network abstraction layer (NAL) unit of a predetermined type is capable of being present in a stream of the video data, from a decoder configuration record in the media file; and
processing the video data based on the first information,
wherein, based on a sample entry carrying the NAL unit array of the predetermined type being a VVC sample entry, the first information is constrained to have a predetermined value for the NAL unit array of the predetermined type and is allowed to have a value other than the predetermined value for a NAL unit array of a type different from the predetermined type.
2 . The media file receiving method of claim 1 , wherein the VVC sample entry comprises a ‘vvc1’ sample entry or a ‘vvi1’ sample entry.
3 . The media file receiving method of claim 2 , wherein, based on the sample entry being the ‘vvc1’ sample entry, the predetermined type comprises decoding capability information (DCI), video parameter set (VPS), sequence parameter set (SPS) and picture parameter set (PPS) NAL unit types.
4 . The media file receiving method of claim 2 , wherein, based on the sample entry being the ‘vvc1’ sample entry, the first information is constrained to have a first value indicating that all NAL units of the predetermined type are present in a subsequent NAL unit array of the NAL unit array of the predetermined type and are not present in the stream.
5 . The media file receiving method of claim 2 , wherein, based on the sample entry being the ‘vvi1’ sample entry, the predetermined type comprises at least one of a DCI, VPS, SPS or PPS NAL unit type.
6 . The media file receiving method of claim 2 , wherein, based on the sample entry being the ‘vvi1’ sample entry, the first information is constrained to have a second value indicating that additional NAL units of the predetermined type are capable of being present in the stream.
7 . A media file receiving apparatus comprising a memory and at least one processor,
wherein the at least one processor is configured to:
obtain first information indicating whether a network abstraction layer (NAL) unit of a predetermined type is capable of being present in a stream of the video data, from a decoder configuration record in the media file; and
process the video data based on the first information,
wherein, based on a sample entry carrying the NAL unit array of the predetermined type being a VVC sample entry,
the first information is constrained to have a predetermined value for the NAL unit array of the predetermined type and is allowed to have a value other than the predetermined value for a NAL unit array of a type different from the predetermined type.
8 . A media file generating method performed by a media file generating apparatus for generating a media file of a predetermined format including video data, the media file generating method comprising:
encoding video data;
generating a decoder configuration record including first information indicating whether a network abstraction layer (NAL) unit of a predetermined type is capable of being present in a stream of the video data; and
generating the media file based on the encoded video data and the decoder configuration record,
wherein, based on a sample entry carrying the NAL unit array of the predetermined type being a VVC sample entry,
the first information is constrained to have a predetermined value for the NAL unit array of the predetermined type and is allowed to have a value other than the predetermined value for a NAL unit array of a type different from the predetermined type.
9 . The media file generating method of claim 8 , wherein the VVC sample entry comprises a ‘vvc1’ sample entry or a ‘vvi1’ sample entry.
10 . The media file generating method of claim 9 , wherein, based on the sample entry being the ‘vvc1’ sample entry, the predetermined type comprises decoding capability information (DCI), video parameter set (VPS), sequence parameter set (SPS) and picture parameter set (PPS) NAL unit types.
11 . The media file generating method of claim 9 , wherein, based on the sample entry being the ‘vvc1’ sample entry, the first information is constrained to have a first value indicating that all NAL units of the predetermined type are present in a subsequent NAL unit array of the NAL unit array of the predetermined type and are not present in the stream.
12 . The media file generating method of claim 9 , wherein, based on the sample entry being the ‘vvi1’ sample entry, the predetermined type comprises at least one of a DCI, VPS, SPS or PPS NAL unit type.
13 . The media file generating method of claim 9 , wherein, based on the sample entry being the ‘vvi1’ sample entry, the first information is constrained to have a second value indicating that additional NAL units of the predetermined type are capable of being present in the stream.
14 . A method of transmitting the media file generated by the media file generating method of claim 8 .
15 . A media file generating apparatus comprising a memory and at least one processor,
wherein the at least one processor is configured to:
encode video data;
generate a decoder configuration record including first information indicating whether a network abstraction layer (NAL) unit of a predetermined type is capable of being present in a stream of the video data; and
generate a media file based on the encoded video data and the decoder configuration record,
wherein, based on a sample entry carrying the NAL unit array of the predetermined type being a VVC sample entry,
the first information is constrained to have a predetermined value for the NAL unit array of the predetermined type and is allowed to have a value other than the predetermined value for a NAL unit array of a type different from the predetermined type.