A transmitting apparatus (100, 110) comprising: a data packet generating unit configured to generate a data packet made up of a header portion and a content portion for each of a predetermined number of pictures of image data; and a transmitting unit configured to correlate the data packet to the image data and transmit the correlated data packet to an external device, wherein the data packet generating unit is configured to - insert related information of the image data into the content portion, - insert identification information to identify the type of the related information into the header portion, - determine the size of the content portion according to the data amount of the related information that is inserted into the content portion, and - insert size information indicating the determined size into the header portion, wherein the related information comprises first disparity information and second disparity information, wherein the first disparity information corresponds to a nearest object playing position in each partition region obtained by partitioning a picture display screen into a plurality of partition regions and the second disparity information corresponds to a farthest object playing position over an entire picture display screen, wherein the related information further comprises information indicating a partition type of the picture display screen and information indicating the total number of partition regions, and wherein the first and second disparity information obtained for each of the predetermined number of pictures of image data is inserted into the content portion in group of picture increments or scene increments. a data packet generating unit configured to generate a data packet made up of a header portion and a content portion for each of a predetermined number of pictures of image data; and a transmitting unit configured to correlate the data packet to the image data and transmit the correlated data packet to an external device, wherein the data packet generating unit is configured to - insert related information of the image data into the content portion, - insert identification information to identify the type of the related information into the header portion, - determine the size of the content portion according to the data amount of the related information that is inserted into the content portion, and - insert size information indicating the determined size into the header portion, - insert related information of the image data into the content portion, - insert identification information to identify the type of the related information into the header portion, - determine the size of the content portion according to the data amount of the related information that is inserted into the content portion, and - insert size information indicating the determined size into the header portion, wherein the related information comprises first disparity information and second disparity information, wherein the first disparity information corresponds to a nearest object playing position in each partition region obtained by partitioning a picture display screen into a plurality of partition regions and the second disparity information corresponds to a farthest object playing position over an entire picture display screen, wherein the related information further comprises information indicating a partition type of the picture display screen and information indicating the total number of partition regions, and wherein the first and second disparity information obtained for each of the predetermined number of pictures of image data is inserted into the content portion in group of picture increments or scene increments.