Image decoding device, image decoding method, and program

An image decoding device comprising a circuit, wherein

• the circuit:
• applies overlapped block motion compensation to a sub-block of which a prediction type is inter prediction among sub-blocks facing a block boundary of a block to be decoded to which a geometric partitioning mode including the inter prediction or intra prediction is applied;
• doesn't apply the overlapped block motion compensation to the sub-block of which the prediction type is the intra prediction among the sub-blocks facing the block boundary;
• and
• generates a final predicted sample of the block to be decoded by performing weighted average on the motion compensation sample to which the overlapped block motion compensation has been applied and the intra predicted sample to which the overlapped block motion compensation has not been applied.

An image decoding device comprising a circuit, wherein

• the circuit executes:
• a first process that generates motion compensation samples configuring a block to be decoded to which a geometric partitioning mode including inter prediction or intra prediction is applied;
• and
• a second process that generates an intra predicted sample configuring the block to be decoded and output the intra predicted sample to the inter prediction unit,
• the first process:
• blends predicted samples of the block to be decoded by performing weighted average on the generated motion compensation samples or the intra predicted samples output from the second process;
• and
• applies overlapped block motion compensation to a sub-block facing a block boundary of the block to be decoded.

An image decoding device comprising a circuit, wherein

• the circuit executes:
• a first process that generates motion compensation samples configuring a block to be decoded to which a geometric partitioning mode including inter prediction or intra prediction is applied;
• and
• a second process that generates an intra predicted sample configuring the block to be decoded and output the intra predicted sample to the inter prediction unit,
• the first process:
• determines whether to apply overlapped block motion compensation to a sub-block facing a block boundary of the block to be decoded;
• and
• blends a predicted samples of the block to be decoded by performing weighted average on the intra predicted samples output from the second process with respect to the motion compensation samples.