IMAGE CODING METHOD FOR CODING INFORMATION INDICATING CODING SCHEME

摘要

An image coding method includes a first flag coding step (S501) of coding a first flag that indicates whether a predetermined extension standard of a predetermined image coding standard is used, a second flag coding step (S503) of coding, when the first flag indicates that the extension standard is used (Yes in S502), a second flag that indicates whether a first scheme is used that is a coding scheme included in the extension standard for coding a difference between adjacent-to-each-other samples included in a residual signal of an current block, and an image coding step (S505) of coding, when the second flag indicates that the first scheme is used (Yes in S504), the image by using the first scheme.

主权项

1. An image coding method for coding an image on a block-by-block basis, the method comprising:
a first flag coding step of coding a first flag that indicates whether a predetermined extension standard of a predetermined image coding standard is used; a second flag coding step of coding, when the first flag indicates that the extension standard is used, a second flag that indicates whether a first scheme is used for coding a current block to be coded included in the image, the first scheme being a coding scheme included in the extension standard; a prediction step of performing prediction on the current block to generate a residual signal, the residual signal indicating a difference between the current block and the predicted current block; and a coding step of coding, when the second flag indicates that the first scheme is used, the current block by coding a difference between adjacent-to-each-other samples of the current block using the first scheme, the samples being obtained from the residual signal.