INTRA-PREDICTION CODING METHOD, INTRA-PREDICTION DECODING METHOD, INTRA-PREDICTION CODING DEVICE, INTRA-PREDICTION DECODING DEVICE, PROGRAMS THEREFOR AND RECORDING MEDIUMS ON WHICH PROGRAMS ARE RECORDED

摘要

Setting a reference pixel signal from a decoded pixel signal in intra-prediction in which a prediction signal is generated in the same frame, acquiring prediction mode identification information that identifies an intra-prediction mode, generating a prediction signal based on the reference pixel signal and the prediction mode identification information, making a determination regarding correction of the prediction signal using a reference pixel having a shorter distance from a pixel that is a prediction target in the intra-prediction mode identified by the prediction mode identification information, and correcting the generated prediction signal according to a result of the determination are included in order to provide an image encoding method and an image decoding method capable of improving subjective image quality and coding efficiency using a closer decoded pixel in an intra-prediction process.