VIDEO ENCODING APPARATUS, VIDEO ENCODING METHOD, AND VIDEO ENCODING COMPUTER PROGRAM

摘要

In a video encoding apparatus, an encoder for encoding a first region of a picture includes: an inhibited block identifying unit which identifies a first inhibit target sub-block that is contained within the first region and that may select a motion vector of a referenced block contained in a second region of an already encoded picture, the second region being a region encoded by another encoder, as a prediction vector for the motion vector of the first sub-block when an inter-predictive coding mode is applied; and a predictive encoding unit which uses a motion vector other than the motion vector of the referenced block as the prediction vector when encoding a second inhibit target sub-block by using the inter-predictive coding mode, wherein the second inhibit target sub-block is a sub-block that contains the first inhibit target sub-block and at which the inter-predictive coding mode is applied.

主权项

1. A video encoding apparatus for encoding a picture contained in video data, comprising:
a divider which divides the picture into a plurality of regions; a plurality of encoders each of which encodes a corresponding one of the plurality of regions to generate encoded data; and a multiplexer which takes as inputs the encoded data output from the plurality of encoders, and generates encoded data of the picture by arranging the input encoded data in a prescribed order, and wherein: a first encoder of the plurality of encoders includes: an inhibited block identifying unit which identifies as a first inhibit target sub-block a first sub-block that is contained in a first region to be encoded by the first encoder, the first region being among the plurality of regions, and that may select a motion vector of a referenced block contained in a second region encoded by a second encoder of the plurality of encoders, 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; a predictive encoding unit which generates 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 an entropy encoding unit which entropy-encodes the encoded data.