Inter-layer reference picture enhancement for multiple layer video coding

A video device comprising:

• a processor configured to:
• determine a first time instance based on motion information of a block of a base layer picture characterized by a second time instance;
• generate a residual block that indicates a difference between a motion compensated block of a base layer reference picture characterized by the first time instance and a block of the base layer picture;
• determine a weight using a reference index associated with the base layer reference picture and a prediction mode;
• apply the weight to the residual block;
• add the weighted residual block to a motion compensated block of an enhancement layer picture characterized by the first time instance to generate an enhanced inter-layer reference (E-ILR) block characterized by the second time instance;
• and
• generate an E-ILR picture characterized by the second time instance that comprises the E-ILR block;
• and
• add the E-ILR picture to a reference picture list for the enhancement layer picture characterized by the second time instance.

A device comprising:

• a processor configured to:
• determine a first time instance based on motion information of a block of a base layer picture characterized by a second time instance;
• generate, using the motion information, a motion compensated differential block characterized by the first time instance that indicates a difference between a block of a base layer reference picture characterized by the first time instance and a block of an enhancement layer picture characterized by the first time instance;
• determine a weight using a reference index associated with the base layer reference picture and a prediction mode;
• apply the weight to the motion compensated differential block;
• and
• add the weighted motion compensated differential block to a block of the base layer picture characterized by the second time instance to generate an enhanced inter-layer reference (E-ILR) block characterized by the second time instance.

A method for decoding a video, the method comprising determining, by a device, a first time instance based on motion information of a block of a base layer picture characterized by a second time instance;

• generating, using the motion information, a motion compensated differential block characterized by the first time instance that indicates a difference between a block of a base layer reference picture characterized by the first time instance and a block of an enhancement layer picture characterized by the first time instance;
• determining a weight using a reference index associated with the base layer reference picture and a prediction mode;
• applying the weight to the motion compensated differential block;
• adding the weighted motion compensated differential block to the block of the base layer picture characterized by the second time instance to generate an enhanced inter-layer reference (E-ILR) block characterized by the second time instance;
• generating an E-ILR picture characterized by the second time instance that comprises the E-ILR block;
• and
• adding the E-ILR picture to a reference picture list for the enhancement layer picture characterized by the second time instance.

A method for decoding a video, the method comprising:

• a processor configured to:
• determining a first time instance based on motion information of a block of a base layer picture characterized by a second time instance;
• generating a residual block that indicates a difference between a motion compensated block of a base layer reference picture characterized by the first time instance and a block of the base layer picture;
• determining a weight using a reference index associated with the base layer reference picture and a prediction mode;
• applying the weight to the residual block;
• adding adding the weighted residual block to a motion compensated block of an enhancement layer picture characterized by the first time instance to generate an enhanced inter-layer reference (E-ILR) block characterized by the second time instance;
• and
• generating an E-ILR picture characterized by the second time instance that comprises the E-ILR block;
• and
• adding the E-ILR picture to a reference picture list for the enhancement layer picture characterized by the second time instance.