Method and apparatus for generating/receiving media file which signals output layer set information, and computer-readable recording medium storing media file
A media file generating/receiving method and apparatus for signaling output layer set information and a method of transmitting a media file are provided. The media file receiving method may comprise obtaining operating point information for the video data from the media file and processing the video data based on the obtained operating point information. The operating point information may include an output layer set index for the video data, and a bit length of the output layer set index may 9 bits.
1. A media file receiving method performed by a media file receiving apparatus for receiving a media file of a predetermined format, the media file including video data, the method comprising:
obtaining operating point information for the video data from the media file; and
processing the video data based on the obtained operating point information,
wherein, the operating point information includes an output layer set index for the video data, and
wherein, a bit length of the output layer set index is fixed at 9 bits.
2. The method of claim 1 , wherein, the output layer set index is included in at least one of a sample entry, a sample group box, or an entity group box.
3. The method of claim 1 , wherein, the operating point information further includes first information indicating whether the output layer set index is present in a sample entry.
4. The method of claim 3 , wherein, the output layer set index is obtained based on the first information indicating that the output layer set index is present in the sample entry.
5. The method of claim 3 , wherein, the first information is inferred to be a value indicating that the output layer set index is not present in the sample entry based on that the first information is not present.
6. The method of claim 3 , wherein, the operating point information does not include the first information based on that Profiles, Tiers, and Level (PTL) information is not present in the sample entry.
7. The method of claim 6 , wherein, the first information is inferred to be a value indicating that the output layer set index is not present in the sample entry based on that the operating point information does not include the first information.
8. The method of claim 7 , wherein, the output layer set index is inferred to be 0 based on the first information indicating that the output layer set index is not present in the sample entry.
9. The method of claim 3 , wherein, when the video data includes only a single layer, the first information is limited to have a value indicating that the output layer set index is not present in the sample entry.
10. A media file receiving apparatus comprising a memory and at least one processor,
wherein the at least on processor is configured to,
obtain operating point information for video data from a media file; and
process the video data based on the obtained operating point information,
wherein, the operating point information includes an output layer set index for the video data, and
wherein, a bit length of the output layer set index is fixed at 9 bits.
11. A media file generating method performed by a media file generating apparatus for generating a media file of a predetermined format, the media file including video data, the method comprising:
generating operating point information for the video data, from the media file; and
generating the media file based on the obtained operating point information,
wherein, the operating point information includes an output layer set index for the video data, and
wherein, a bit length of the output layer set index is fixed at 9 bits.
12. A method of transmitting a media file generated by the media file generating method of claim 11 .