Patent ID: 11962744
Assignee: B1 INSTITUTE OF IMAGE TECHNOLOGY, INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method of decoding a 360-degree image, the method comprising:
receiving a bitstream in which the 360-degree image is encoded, the bitstream including data of an extended 2-dimensional image, the extended 2-dimensional image including a 2-dimensional image and a predetermined extension region, and the 2-dimensional image being projected from an image with a 3-dimensional projection structure and including one or more faces;
generating a predicted image by performing inter prediction based on information on the prediction included in the bitstream; and
reconstructing the extended 2-dimensional image based on the predicted image and a residual image,
wherein a size of the extension region is determined based on one or more syntax elements, the one or more syntax elements being obtained from 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.