Patent ID: 11949846
Assignee: B1 INSTITUTE OF IMAGE TECHNOLOGY, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 3:
4. A method of transmitting a bitstream that is generated by a method for encoding a 360-degree image, the method being performed by an image encoding apparatus, the method for encoding a 360-degree image comprising:
obtaining a 2-dimensional image projected from an image with a 3-dimensional projection structure and including at least one face;
obtaining an extended 2-dimensional image including the 2-dimensional image and a predetermined extension region;
generating a residual image, information on the residual image being encoded into the bitstream; and
encoding data of the extended 2-dimensional image into the bitstream based on the residual image,
wherein size information on a size of the extension region is encoded into the bitstream,
wherein information indicating whether the extended 2-dimensional image includes the extension region is encoded into the bitstream,
wherein the 3-dimensional projection structure is selectively determined among a plurality of 3-dimensional projection structures including a first 3-dimensional projection structure and a second 3-dimensional projection structure, the determined 3-dimensional projection structure being encoded into the bitstream based on identification information,
wherein, in case of the first 3-dimensional projection structure, the size information on the size of the extension region comprises first width information for a left extension region on a left side of the 2-dimensional image and second width information for a right extension region on a right side of the 2-dimensional image, and
wherein sample values of the extension region are determined by a padding method where an image characteristic of the extension region is the same as the image characteristic of the face.