IMAGE DATA ENCODING/DECODING METHOD AND APPARATUS

Japanese Patent JP2023040179

A

To provide an image data encoding/decoding method and apparatus for a 360-degree image.SOLUTION: A decoding method includes: generating a prediction image by referring to syntax information obtained from a bitstream obtained by encoding a 360-degree image; combining the generated prediction image with a residual image obtained by dequantizing and inverse-transforming the bitstream to obtain a decoded image; and reconstructing the decoded image into a 360-degree image according to a projection format. Here, the process of generating the prediction image includes: obtaining, from motion information included in the syntax information, a motion vector candidate group including a motion vector of a block adjacent to a current block to be decoded; deriving a prediction motion vector from the motion vector candidate group based on selection information extracted from the motion information; and determining a prediction block for the current block to be decoded, using a final motion vector derived by adding the prediction motion vector to a differential motion vector extracted from the motion information.SELECTED DRAWING: None

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KIM, KI BAEK

JP2023001736A

March 22, 2023

January 10, 2023

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B1 INSTITUTE OF IMAGE TECHNOLOGY, INC.

H04N19/52; H04N19/597

JP2015521442A

2015-07-27

US20060034374A1	2006-02-16
US20160142697A1	2016-05-19

Miyajima Manabu
Takeshi Sekine
Akira Akaoka
Daigo Sannami

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