US 11,388,404 B2 · Context design for prediction mode and CBF

Abstract

A method of controlling intra-inter prediction for decoding or encoding of a video sequence, is performed by at least one processor. The method includes determining whether a neighboring block of a current block is coded by an intra-inter prediction mode, and based on the neighboring block being determined to be coded by the intra-inter prediction mode, performing intra mode coding of the current block, using an intra prediction mode associated with the intra-inter prediction mode, setting a prediction mode flag associated with the neighboring block, deriving a context value, based on the set prediction mode flag associated with the neighboring block, and using the derived context value, performing entropy coding of a prediction mode flag associated with the current block that indicates that the current block is intra coded.

Claims20

Dependent claims

A method of controlling intra-inter prediction for decoding or encoding of a video sequence, the method being performed by at least one processor, and the method comprising:

setting a first prediction mode flag pred_mode_flag associated with a neighboring block above or to the left of a current block to indicate whether the neighboring block is coded in inter prediction mode, or intra prediction mode;
determining that the current block is coded in an intra-inter prediction mode;
deriving a context value associated with a second prediction mode flag pred_mode_flag associated with the current block based on the first prediction mode flag associated with the neighboring block, wherein deriving the context value further comprises:
based on the neighboring block being determined to be coded in the intra prediction mode, incrementing the context value of the second prediction mode flag by 2, and
based on the neighboring block being determined to be coded in the inter prediction mode, incrementing the context value by 0;
performing entropy coding of the second prediction mode flag associated with the current block using the derived context value.

3 more elements

An apparatus for controlling intra-inter prediction for decoding or encoding of a video sequence, the apparatus comprising:

at least one memory configured to store computer program code;
and
at least one processor configured to access the at least one memory and operate according to the computer program code, the computer program code comprising:
setting code configured to cause the at least one processor to:
set a first prediction mode flag pred_mode_flag associated with a neighboring block above or to the left of a current block to indicate whether the neighboring block is coded in inter prediction mode, or intra prediction mode;
determine that the current block is coded in an intra-inter prediction mode;
derive a context value associated with a second prediction mode flag pred_mode_flag associated with the current block based on the first prediction mode flag associated with the neighboring block, wherein deriving the context value further comprises:
based on the neighboring block being determined to be coded in the intra prediction mode, incrementing the context value of the second prediction mode flag by 2, and
based on the neighboring block being determined to be coded in the inter prediction mode, incrementing the context value by 0;
perform entropy coding the second prediction mode flag associated with the current block using the derived context value.

7 more elements

A non-transitory computer-readable storage medium storing instructions that cause at least one processor to:

set a first prediction mode flag pred_mode_flag associated with a neighboring block above or to the left of a current block to indicate whether the neighboring block is coded in inter prediction mode or intra prediction mode;
determine that the current block is coded in an intra-inter prediction mode;
derive a context value associated with a second prediction mode flag pred_mode_flag associated with the current blocka based on the first prediction mode flag associated with the neighboring block, wherein deriving the context value further comprises:
based on the neighboring block being determined to be coded in the intra prediction mode, incrementing the context value of the second prediction mode flag by 2, and
based on the neighboring block being determined to be coded in the inter prediction mode, incrementing the context value by 0;
perform entropy coding of the second prediction mode flag associated with the current block using the derived context value.

3 more elements

Dependencies are inferred from the claim text.

Context design for prediction mode and CBF

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Context design for prediction mode and CBF

Life of this patent

Abstract

Claims20