Position-dependent intra-inter prediction combination in video coding

A device for coding video data, the device comprising:

• a memory configured to store video data;
• and
• one or more processors implemented in circuitry and configured to:
• generate an inter-prediction block for a current block of the video data;
• generate an intra-prediction block for the current block;
• generate a prediction block for the current block, wherein to generate the prediction block, the one or more processors are configured to, for each sample of the prediction block:
• determine a first weight for the sample according to a position of the sample in the prediction block;
• determine a second weight for the sample according to the position of the sample in the prediction block;
• apply the first weight to a sample at the position in the inter-prediction block to generate a weighted inter-prediction sample;
• apply the second weight to a sample at the position in the intra-prediction block to generate a weighted intra-prediction sample;
• and
• calculate a value for the sample at the position in the prediction block using the weighted inter-prediction sample and the weighted intra-prediction sample, wherein to calculate the value for the sample, the one or more processors are configured to average the weighted intra-prediction sample and the weighted inter-prediction sample and blend the average with weighted neighboring reconstructed reference samples of the current block;
• and
• code the current block using the prediction block.

A device for decoding video data, the device comprising:

• means for generating an inter-prediction block for a current block of video data;
• means for generating an intra-prediction block for the current block;
• means for generating each sample of the prediction block for the current block, comprising:
• means for determining a first weight for the sample according to a position of the sample in the prediction block;
• means for determining a second weight for the sample according to the position of the sample in the prediction block;
• means for applying the first weight to a sample at the position in the inter-prediction block to generate a weighted inter-prediction sample;
• means for applying the second weight to a sample at the position in the intra-prediction block to generate a weighted intra-prediction sample;
• and
• means for calculating a value for the sample at the position in the prediction block using the weighted inter-prediction sample and the weighted intra-prediction sample, including means for averaging the weighted intra-prediction sample and the weighted inter-prediction sample and blending the average with weighted neighboring reconstructed reference samples of the current block;
• and
• means for coding the current block using the prediction block.

A computer-readable storage medium having stored thereon instructions that, when executed, cause a processor of a device for encoding video data to:

• generate an inter-prediction block for a current block of video data;
• generate an intra-prediction block for the current block;
• generate a prediction block for the current block, comprising instructions that cause the processor to, for each sample of the prediction block:
• determine a first weight for the sample according to a position of the sample in the prediction block;
• determine a second weight for the sample according to the position of the sample in the prediction block;
• apply the first weight to a sample at the position in the inter-prediction block to generate a weighted inter-prediction sample;
• apply the second weight to a sample at the position in the intra-prediction block to generate a weighted intra-prediction sample;
• and
• calculate a value for the sample at the position in the prediction block using the weighted inter-prediction sample and the weighted intra-prediction sample, including instructions that cause the processor to average the weighted intra-prediction sample and the weighted inter-prediction sample and blending the average with weighted neighboring reconstructed reference samples of the current block;
• and
• code the current block using the prediction block.