Image decoding device, image decoding method, and program

An image decoding device comprising a circuit and a buffer, wherein:

• the circuit derives motion information for a geometric partitioning mode to generate a motion compensation sample;
• the circuit derives an intra prediction mode for the geometric partitioning mode to generate an intra-predicted sample;
• the buffer stores or outputs prediction information including motion information or an intra prediction mode of a block to be decoded to which the geometric partitioning mode is applied, and a prediction type with which whether inter prediction or intra prediction has been applied can be determined;
• the circuit controls a content of the prediction information including motion information or an intra prediction mode applied to a block and a method of storing the prediction information, according to a stored prediction information type calculated in each sub-block configuring the block to be decoded;
• and
• the circuit performs weighted averaging on the motion compensation sample and the intra predicted sample with a predetermined weight value to blend a new prediction sample.

An image decoding device comprising a circuit and a buffer, wherein:

• the circuit derives motion information for a geometric partitioning mode to generate a motion compensation sample;
• the circuit derives an intra prediction mode for the geometric partitioning mode to generate an intra-predicted sample;
• the buffer stores or outputs prediction information including motion information or an intra prediction mode of a block to be decoded to which the geometric partitioning mode is applied, and a prediction type with which whether inter prediction or intra prediction has been applied can be determined;
• the circuit controls a content of the prediction information including motion information or an intra prediction mode applied to a block and a method of storing the prediction information, according to a stored prediction information type calculated in each sub-block configuring the block to be decoded;
• and
• the circuit determines a boundary strength value at a time of applying a deblocking filter for a block boundary, and applies the deblocking filter.

An image decoding method, comprising:

• deriving motion information for a geometric partitioning mode to generate motion compensation samples;
• deriving an intra prediction mode for the geometric partitioning mode to generate an intra predicted sample;
• storing or outputting prediction information including motion information or an intra prediction mode of a block to be decoded to which the geometric partitioning mode is applied, and a prediction type with which it can be determined whether inter prediction or intra prediction has been applied;
• and
• controlling a content of the prediction information including motion information or an intra prediction mode applied to a block and a method of storing the prediction information, according to a stored prediction information type calculated in each sub-block configuring the block to be decoded.

A non-transitory computer-readable medium storing a program thereon, the program being executable by a computer to control the computer to function as an image decoding device, and the image decoding device comprising a circuit and a buffer, wherein:

• the circuit:
• derives motion information for a geometric partitioning mode to generate a motion compensation sample;
• and
• derives an intra prediction mode for the geometric partitioning mode to generate an intra-predicted sample;
• the buffer stores or output prediction information including motion information or an intra prediction mode of a block to be decoded to which the geometric partitioning mode is applied, and a prediction type with which it can be determined whether inter prediction or intra prediction has been applied;
• and
• the circuit controls a content of the prediction information including motion information or an intra prediction mode applied to a block and a method of storing the prediction information, according to a stored prediction information type calculated in each sub-block configuring the block to be decoded.