Video encoding apparatus, video encoding method, and video encoding computer program

A video encoding method comprising:

• dividing a picture contained in video data into a plurality of regions by a divider;
• generating encoded data by encoding the plurality of regions independently of each other by each of a plurality of encoders;
• and
• generating encoded data of the picture by arranging the encoded data of the plurality of regions in a prescribed order by a multiplexer, and wherein:
• encoding a first region of the plurality of regions by a first encoder of the plurality of encoders includes:
• identifying as a first inhibit target sub-block a first sub-block that is contained in the first region and that may select a motion vector of a referenced block contained in a second region of the plurality of regions in another picture already encoded by a second encoder of the plurality of encoders, as a prediction vector for the motion vector of the first sub-block when encoding the first sub-block by using an inter-predictive coding mode that refers to the picture already encoded;
• generating encoded data by encoding a second inhibit target sub-block either by using the inter-predictive coding mode by selecting as the prediction vector a motion vector other than the motion vector of the referenced block selected for the first inhibit target sub-block or by using an intra-predictive coding mode that refers only to the picture being encoded, wherein the second inhibit target sub-block is a second sub-block containing the first inhibit target sub-block and is selected from among a plurality of second sub-blocks into which the first region is divided and at each of which a decision is made as to whether to apply the inter-predictive coding mode or the intra-predictive coding mode;
• and
• entropy-encoding the encoded data.

A non-transitory computer-readable recording medium having recorded thereon a video encoding computer program that causes a computer to execute a process comprising:

• dividing a picture contained in video data into a plurality of regions;
• generating encoded data by encoding the plurality of regions independently of each other;
• and
• generating encoded data of the picture by arranging the encoded data of the plurality of regions in a prescribed order, and wherein:
• encoding a first one of the plurality of regions includes:
• identifying as a first inhibit target sub-block a first sub-block that is contained in the first region and that may select a motion vector of a referenced block contained in a second one of the plurality of regions in another picture already encoded, as a prediction vector for the motion vector of the first sub-block when encoding the first sub-block by using an inter-predictive coding mode that refers to the picture already encoded;
• generating encoded data by encoding a second inhibit target sub-block either by using the inter-predictive coding mode by selecting as the prediction vector a motion vector other than the motion vector of the referenced block selected for the first inhibit target sub-block or by using an intra-predictive coding mode that refers only to the picture being encoded, wherein the second inhibit target sub-block is a second sub-block containing the first inhibit target sub-block and is selected from among a plurality of second sub-blocks into which the first region is divided and at each of which a decision is made as to whether to apply the inter-predictive coding mode or the intra-predictive coding mode;
• and
• entropy-encoding the encoded data.

A video encoding apparatus for encoding a picture contained in video data, comprising:

• a processor configured to:
• identify as a first inhibit target sub-block a first sub-block that is contained in a first region to be encoded by the processor, the first region being among a plurality of regions into which the picture is divided, and that may select a motion vector of a referenced block contained in a second region encoded by an another processor, the second region being among the plurality of regions in another picture already encoded, as a prediction vector for the motion vector of the first sub-block when encoding the first sub-block by using an inter-predictive coding mode that refers to the picture already encoded;
• generate encoded data by encoding a second inhibit target sub-block either by using the inter-predictive coding mode by selecting as the prediction vector a motion vector other than the motion vector of the referenced block selected for the first inhibit target sub-block or by using an intra-predictive coding mode that refers only to the picture being encoded, wherein the second inhibit target sub-block is a second sub-block containing the first inhibit target sub-block and is selected from among a plurality of second sub-blocks into which the first region is divided and at each of which a decision is made as to whether to apply the inter-predictive coding mode or the intra-predictive coding mode;
• and
• entropy-encode the encoded data.