Moving image encoding method, moving image decoding method, moving image encoding apparatus, moving image decoding apparatus, moving image encoding program, and moving image decoding program

A moving image decoding apparatus that, at the time a decoding target image is decoded from encoded data of a multiview moving image comprising moving images of a plurality of different views, while performing prediction between the different views using reference view motion information that is motion information in a reference view image for a reference view that is different from the decoding target image and a depth map for an object within the multiview moving image, performs decoding of a decoding target region that is one of regions obtained by dividing the decoding target image, the moving image decoding apparatus comprising:

• a corresponding region setting unit that sets a corresponding region on the depth map for the decoding target region;
• a region dividing unit that sets a prediction region that is one of regions obtained by dividing the decoding target region;
• a disparity vector generation unit that, for the prediction region, generates a disparity vector for the reference view using depth information for a region within the corresponding region that corresponds to the prediction region;
• a motion information generation unit that generates motion information in the prediction region from the reference view motion information based on the disparity vector for the reference view;
• and
• a prediction image generation unit that generates a prediction image for the prediction region using the motion information in the prediction region.

A moving image encoding method that, at the time a single frame of a multiview moving image comprising moving images of a plurality of different views is encoded, while performing prediction between the different views using reference view motion information that is motion information in a reference view image for a reference view that is different from an encoding target image and a depth map for an object within the multiview moving image, performs encoding of an encoding target region that is one of regions obtained by dividing the encoding target image, the moving image encoding method comprising:

• a corresponding region setting step of setting a corresponding region on the depth map for the encoding target region;
• a region dividing step of setting a prediction region that is one of regions obtained by dividing the encoding target region;
• a disparity vector generation step of generating, for the prediction region, a disparity vector for the reference view using depth information for a region within the corresponding region that corresponds to the prediction region;
• a motion information generation step of generating motion information in the prediction region from the reference view motion information based on the disparity vector for the reference view;
• and
• a prediction image generation step of generating a prediction image for the prediction region using the motion information in the prediction region.

A moving image decoding method that, at the time a decoding target image is decoded from encoded data of a multiview moving image comprising moving images of a plurality of different views, while performing prediction between the different views using reference view motion information that is motion information in a reference view image for a reference view that is different from the decoding target image and a depth map for an object within the multiview moving image, performs decoding of a decoding target region that is one of regions obtained by dividing the decoding target image, the moving image decoding method comprising:

• a corresponding region setting step of setting a corresponding region on the depth map for the decoding target region;
• a region dividing step of setting a prediction region that is one of regions obtained by dividing the decoding target region;
• a disparity vector generation step of generating, for the prediction region, a disparity vector for the reference view using depth information for a region within the corresponding region that corresponds to the prediction region;
• a motion information generation step of generating motion information in the prediction region from the reference view motion information based on the disparity vector for the reference view;
• and
• a prediction image generation step of generating a prediction image for the prediction region using the motion information in the prediction region.