Patent ID: 11962744
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 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 predicted image by performing inter prediction, information on the prediction being encoded into the bitstream; and
encoding data of the extended 2-dimensional image into the bitstream based on the predicted image and a residual image,
wherein a size of the extension region is encoded based on one or more syntax elements, the one or more syntax elements being encoded into the bitstream,
wherein the number of syntax elements is determined differently based on a projection format for the 3-dimensional projection structure, the projection format being one among a plurality of projection formats including an ERP format in which the 360-degree image is projected in a two-dimensional plane and a CMP format in which the 360-degree image is projected in a cube, and
wherein sample values of the extension region are determined by a padding method where an image characteristic of the extension region changes from the image characteristic of the face.