Generation device, identification information generation method, reproduction device, and image reproduction related to stereo packing of projected frames

A file generation method, implemented via at least one processor, the method comprising:

• generating a packed frame for an image comprising information of two projected frames by determining whether or not to perform a region-wise packing process of arranging a plurality of region images of each projected frame of the two projected frames in the packed frame;
• and
• generating a file including
• the packed frame,
• information indicating whether or not the region-wise packing process is performed for each packed frame, and
• for each packed frame that the region-wise packing process is performed, information indicating a packing type of the region-wise packing process performed for arranging the plurality of region images of each projected frame,
• wherein the two projected frames include a first projected frame corresponding to a first omnidirectional image and a second projected frame corresponding to a second omnidirectional image, and
• wherein the packing type is selected from among
• either a monoscopic packing type or a first stereoscopic packing type in which the plurality of region images of the first projected frame are arranged in a first configuration and the plurality of region images of the second projected frame are arranged in a second configuration in different areas of the packed frame, wherein either the monoscopic packing type or the first stereoscopic packing type is determined using a same information indicating the packing type according to whether the image is monoscopic or stereoscopic, or
• a second stereoscopic packing type in which the plurality of region images of the first projected frame and the plurality of region images of the second projected frame are interspersed in the packed frame.

A client device comprising:

• a file acquisition unit configured to acquire a file including a packed frame for an image comprising information of two projected frames;
• and
• a decoder configured to decode the packed frame for the image comprising information of the two projected frames by determining whether or not the packed frame was generated by performing a region-wise packing process of arranging a plurality of region images of each projected frame of the two projected frames in the packed frame,
• wherein the file further includes
• information indicating whether or not the region-wise packing process is performed for each packed frame, and
• for each packed frame that the region-wise packing process is performed, information indicating a packing type of the region-wise packing process performed for arranging the plurality of region images of each projected frame,
• wherein the two projected frames include a first projected frame corresponding to a first omnidirectional image and a second projected frame corresponding to a second omnidirectional image,
• wherein the packing type is selected from among
• either a monoscopic packing type or a first stereoscopic packing type in which the plurality of region images of the first projected frame are arranged in a first configuration and the plurality of region images of the second projected frame are arranged in a second configuration in different areas of the packed frame, wherein either the monoscopic packing type or the first stereoscopic packing type is determined using a same information indicating the packing type according to whether the image is monoscopic or stereoscopic, or
• a second stereoscopic packing type in which the plurality of region images of the first projected frame and the plurality of region images of the second projected frame are interspersed in the packed frame, and
• wherein the file acquisition unit and the decoder are each implemented via at least one processor.