Method and apparatus of view synthesis prediction in 3D video coding

A system comprising:

• one or more electronic circuits configured to:
• receive a reference picture in a reference view;
• receive input data associated with a first texture block and a second texture block in a dependent view;
• derive a first disparity vector (DV) from a set of neighboring blocks of the first texture block;
• locate a first depth block from a reference depth map in the reference view according to the first DV and a location of the first texture block;
• generate view synthesis prediction (VSP) data for the first texture block by backward warping the first texture block to the reference picture using the first depth block,
• wherein the first depth block is located from a reference depth map in the dependent view according to a location of the first texture block and a selected disparity vector (DV),
• wherein the selected DV is derived using a Neighboring Block Disparity Vector (NBDV) process, wherein the selected DV is selected based on a first available DV from a set of neighboring blocks of the current texture block,
• wherein a selection process for the selected DV is determined adaptively in a sequence level, picture level, slice level, largest coding unit (LCU) level, coding unit (CU) level, prediction unit (PU) level, Macroblock level, or sub-block level, and
• wherein the selected DV that is derived using the NBDV process is utilized to fetch the depth block for VSP data generation, wherein the depth block is accessed by the selected DV only once for each texture block;
• encode the first texture block using the VSP data;
• derive a refined DV from a maximum value of a second depth block located according to a second DV derived from a set of neighboring blocks of the second texture block;
• derive an inter-view Merge candidate using the refined DV and a location of the second texture block to locate a refined depth block from the reference depth map;
• encode the second texture block using the inter-view Merge candidate;
• and
• encode a corresponding depth block in the dependent view using non-VSP inter-view prediction based on motion information inherited from the first texture block while the first texture block is encoded using the VSP data,
• wherein the corresponding depth block is collocated with the first texture block.

An apparatus comprising:

• processing circuitry configured to:
• receive a reference picture in a reference view;
• receive input data associated with a first texture block and a second texture block in a dependent view;
• derive a first disparity vector (DV) from a set of neighboring blocks of the first texture block;
• locate a first depth block from a reference depth map in the reference view according to the first DV and a location of the first texture block;
• generate view synthesis prediction (VSP) data for the first texture block by backward warping the first texture block to the reference picture using the first depth block,
• wherein the first depth block is located from a reference depth map in the dependent view according to a location of the first texture block and a selected disparity vector (DV),
• wherein the selected DV is derived using a Neighboring Block Disparity Vector (NBDV) process,
• wherein the selected DV is selected based on a first available DV from a set of neighboring blocks of the current texture block,
• wherein a selection process for the selected DV is determined adaptively in a sequence level, picture level, slice level, largest coding unit (LCU) level, coding unit (CU) level, prediction unit (PU) level, Macroblock level, or sub-block level, and
• wherein the selected DV that is derived using the NBDV process is utilized to fetch the depth block for VSP data generation,
• wherein the depth block is accessed by the selected DV only once for each texture block;
• encode the first texture block using the VSP data;
• derive a refined DV from a maximum value of a second depth block located according to a second DV derived from a set of neighboring blocks of the second texture block;
• derive an inter-view Merge candidate using the refined DV and a location of the second texture block to locate a refined depth block from the reference depth map;
• encode the second texture block using the inter-view Merge candidate;
• and
• encode a corresponding depth block in the dependent view using non-VSP inter-view prediction based on motion information inherited from the first texture block while the first texture block is encoded using the VSP data,
• wherein the corresponding depth block is collocated with the first texture block.

A non-transitory computer-readable medium storing instructions that, when executed by one or more processors of a computing device, cause the computing device to:

• receive a reference picture in a reference view;
• receive input data associated with a first texture block and a second texture block in a dependent view;
• derive a first disparity vector (DV) from a set of neighboring blocks of the first texture block;
• locate a first depth block from a reference depth map in the reference view according to the first DV and a location of the first texture block;
• generate view synthesis prediction (VSP) data for the first texture block by backward warping the first texture block to the reference picture using the first depth block,
• wherein the first depth block is located from a reference depth map in the dependent view according to a location of the first texture block and a selected disparity vector (DV),
• wherein the selected DV is derived using a Neighboring Block Disparity Vector (NBDV) process,
• wherein the selected DV is selected based on a first available DV from a set of neighboring blocks of the current texture block,
• wherein a selection process for the selected DV is determined adaptively in a sequence level, picture level, slice level, largest coding unit (LCU) level, coding unit (CU) level, prediction unit (PU) level, Macroblock level, or sub-block level, and
• wherein the selected DV that is derived using the NBDV process is utilized to fetch the depth block for VSP data generation, wherein the depth block is accessed by the selected DV only once for each texture block;
• encode the first texture block using the VSP data;
• derive a refined DV from a maximum value of a second depth block located according to a second DV derived from a set of neighboring blocks of the second texture block;
• derive an inter-view Merge candidate using the refined DV and a location of the second texture block to locate a refined depth block from the reference depth map;
• encode the second texture block using the inter-view Merge candidate;
• and
• encode a corresponding depth block in the dependent view using non-VSP inter-view prediction based on motion information inherited from the first texture block while the first texture block is encoded using the VSP data,
• wherein the corresponding depth block is collocated with the first texture block.