Signaling of region-of-interest scalability information in media files
View Patent ↗A method for signaling ROI scalability information in a file format. The present invention provides an efficient signaling of ROI scalability information in the file format, wherein the signaling comprises providing the geometrical information of a ROI and an indication to identify the ROI each coded data unit is associated with within a tier or layer.
1. A method comprising:
causing storage, with at least one processor, of a scalable video bitstream in a container file in at least one memory, the scalable video bitstream comprising at least one full picture-based scalable layer and at least one region-of-interest (ROI) scalable layer; identifying each ROI scalable layer by a first identifier and a second identifier, the first identifier identifying a full picture-based scalable layer to which the ROI belongs, and the second identifier identifying a ROI scalable layer within the full picture-based scalable layer; and indicating geometry information for the ROI scalable layer.
2. The method of claim 1 , wherein the first identifier and the second identifier are stored in the container file.
3. The method of claim 2 , wherein a geometry information derived from at least one of a position, shape and size of a ROI scalable layer is stored in the container file.
4. The method of claim 2 , wherein the second identifier is derived from the position of a ROI scalable layer.
5. The method of claim 2 , wherein the mapping of a coded data unit in the scalable video stream to a ROI scalable layer is stored in the container file.
6. The method of claim 2 , wherein the file container is constructed according to the Scalable Video Coding (SVC) file format standard.
7. The method of claim 6 , wherein the first identifier is signaled in a ScalableTierEntry( ) data structure.
8. The method of claim 7 , wherein a geometry information derived from at least one of a position, shape and size of a ROI scalable layer is signaled in the ScalableTierEntry( ) data structure.
9. The method of claim 8 , wherein the mapping of a coded data unit to the second identifier is signaled using a timed metadata.
10. The method of claim 8 , wherein the mapping of a coded data unit to the second identifier is signaled in a box.
11. The method of claim 8 , wherein the mapping of a coded data unit to the second identifier is signaled using a sample group.
12. A computer program product, comprising a non-transitory computer-readable storage medium and computer instructions stored therein, the computer program instructions comprising computer program instructions configured to: cause storing of a scalable video bitstream in a container file, the scalable video bitstream comprising at least one full picture-based scalable layer and at least one region-of-interest (ROI) scalable layer; identify each ROI scalable layer by a first identifier and a second identifier, the first identifier identifying a full picture-based scalable layer to which the ROI belongs, and the second identifier identifying a ROI scalable layer within the full picture-based scalable layer; and indicate geometry information for the ROI scalable layer.
13. An apparatus, comprising: a processor; and a memory communicatively connected to the processor and including computer program instructions, the memory and the computer program instructions being configured to, in cooperation with the processor, cause the apparatus to: cause storing of a scalable video bitstream in a container file, the scalable video bitstream comprising at least one full picture-based scalable layer and at least one region-of-interest (ROI) scalable layer; identify each ROI scalable layer by a first identifier and a second identifier, the first identifier identifying a full picture-based scalable layer to which the ROI belongs, and the second identifier identifying a ROI scalable layer within the full picture-based scalable layer; and indicate geometry information for the ROI scalable layer.
14. The apparatus of claim 13 , wherein the first identifier and the second identifier are stored in the container file.
15. The apparatus of claim 14 , wherein a geometry information derived from at least one of a position, shape and size of a ROI scalable layer is stored in the container file.
16. The apparatus of claim 14 , wherein the second identifier is derived from the position of a ROI scalable layer.
17. The apparatus of claim 14 , wherein the mapping of a coded data unit in the scalable video stream to a ROI scalable layer is stored in the container file.
18. The apparatus of claim 14 , wherein the file container is constructed according to the Scalable Video Coding (SVC) file format standard.
19. The apparatus of claim 18 , wherein the first identifier is signaled in a ScalableTierEntry( ) data structure.
20. The apparatus of claim 19 , wherein a geometry information derived from at least one of a position, shape and size of a ROI scalable layer is signaled in the ScalableTierEntry( ) data structure.
21. The apparatus of claim 20 , wherein the mapping of a coded data unit to the second identifier is signaled using a timed metadata.
22. The apparatus of claim 20 , wherein the mapping of a coded data unit to the second identifier is signaled in a box.
23. The apparatus of claim 20 , wherein the mapping of a coded data unit to the second identifier is signaled using a sample group.