IMAGE PREDICTION ENCODING DEVICE, IMAGE PREDICTION DECODING DEVICE, IMAGE PREDICTION ENCODING METHOD, IMAGE PREDICTION DECODING METHOD, IMAGE PREDICTION ENCODING PROGRAM, AND IMAGE PREDICTION DECODING PROGRAM

摘要

It is possible to effectively suppress mode information for identifying a prediction method even when a plenty of prediction methods are provided for generating an in-screen prediction signal in a pixel region. A screen prediction encoding device (10) includes: a block division unit (102); an in-screen prediction signal generation method decision unit (105); an in-screen prediction signal generation unit (106); a subtractor (108); a conversion unit (109); a quantization unit (110); and an entropy encoding unit (115). The in-screen prediction signal generation method decision unit (105) derives from a plurality of first prediction methods, anadjacent region prediction method for generating an in-screen prediction signal having a high correlation with a pixel signal in an adjacent region by using a pixel group in the vicinity of a target region and predicts a target region prediction method for the target pixel signal in accordance with the derived adjacent region prediction method. The in-screen prediction signal generation unit (106) generates an in-screen prediction signal for the target region in accordance with the target region prediction method.