Image data encapsulation with referenced description information
Methods of encapsulating a bitstream include generating reference information to enable image items identifying image portions of a bit stream to be referenced to corresponding description information. The resulting encapsulated file may also include information identifying a timed portion of the data stream corresponding to a video sequence. Description information may include spatial parameters, such as position and width and height of sub-parts of an overall image, and/or display parameters such as colour display, pixel aspect ratio, and clean aperture parameters.
1. A method of processing an image file, the method comprising:
obtaining an image file including:
sub-image information comprising both of (i) one or more item_IDs for identifying one or more sub-images of each of one or more still images and (ii) location information used for identifying data location of each of the one or more sub-images identified by the one or more item_IDs,
sub-image description information comprising parameters relating to the one or more sub-images, and
reference information for associating the one or more item_IDs with a parameter in the sub-image description information; and
reproducing at least one sub-image using information in the image file.
2. The method according to claim 1 , wherein the sub-image description information is embedded in a bitstream representing the one or more images.
3. The method according to claim 2 , further generating a metadata item for referencing the sub-image description information in the bitstream.
4. The method according to claim 1 , wherein the one or more sub-images are grouped into one or more groups and wherein the reference information is generated for associating a group of sub-images with the parameter in the sub-image description information.
5. The method according to claim 1 , wherein all references linking metadata items to another item are included in a single reference box in the image file.
6. The method according to claim 1 , wherein the obtaining is performed by a client module for adaptive streaming, is performed by reading out a memory, or is performed by a communication module for reception.
7. The method according to claim 1 , wherein the parameter includes at least one of colour display information, pixel aspect ratio information, clean aperture information, layer information, and spatial description information.
8. The method according to claim 1 , wherein the parameter includes spatial description information and wherein spatial description information includes one or more of a spatial offset, a width and a height of each of the one or more sub-images.
9. The method according to claim 1 , wherein the image file corresponds to a standardized file format.
10. The method of claim 1 , wherein the sub-image information is defined in an “ItemLocationBox”.
11. The method of claim 1 , wherein the reference information is defined in an “ItemReferenceBox”.
12. The method of claim 1 , wherein the image file further includes information for associating the one or more sub-images with a single still image among the one or more still images.
13. The method of claim 12 , wherein the information for associating the one or more sub-images with the single still image is defined in an “ItemReferenceBox”.
14. A device for processing an image file, the device comprising:
one or more hardware processors, and
a memory storing one or more programs configured to be executed by the one or more hardware processor, the one or more programs including instructions for:
obtaining an image file including:
sub-image information comprising both of (i) one or more item_IDs for identifying one or more sub-images of each of one or more still images and (ii) location information used for identifying data location of each of the one or more sub-images identified by the one or more item_IDs,
sub-image description information comprising parameters relating to one or more sub-images, and
reference information for associating the one or more item_IDs with a parameter in the sub-image description information; and
reproducing at least one sub-image using information in the image file.
15. The device of claim 14 wherein the sub-image information is defined in an “ItemLocationBox” and the reference information is defined in an “ItemReferenceBox” box.
16. The device of claim 14 , wherein the image file further includes information for associating the one or more sub-images and a single still image among the one or more still images.
17. The device of claim 16 , wherein the information for linking the one or more sub images and the single still image is defined in an “ItemReferenceBox”.
18. A non-transitory computer readable storage medium storing a computer program comprising instructions which, when executed on a computer cause that computer to implement a method of processing an image file, the method comprising:
obtaining an image file including:
sub-image information comprising both of (i) one or more item_IDs for identifying one or more sub-images of each of one or more still images and (ii) location information used for identifying data location of each of the one or more sub-images identified by the one or more item_IDs,
sub-image description information comprising parameters relating to the one or more sub-images, and
reference information for associating the one or more item_IDs with a parameter in the sub-image description information; and
reproducing at least one sub-image using information in the image file.
19. The non-transitory computer readable storage medium of claim 18 , wherein the sub-image information is defined in an “ItemLocationBox” and the reference information is defined in an “ItemReferenceBox”.