Data encoding apparatus, data decoding apparatus, data encoding method, data decoding method, and recording medium recorded with program

摘要

This data encoding apparatus includes: a prediction unit for calculating a prediction value of target data using read data; a subtractor for calculating a prediction error value, which is the error between the target data and the prediction value; a filtering unit and a subtractor for performing filtering on the prediction error value relating to the target data and a determined prediction error value, to calculate a corrected prediction error value relating to the target data; an absolute value calculation unit for calculating the absolute value of the corrected prediction error value; a k parameter determination unit for determining the code length of a fixed length code part using the flatness and dynamic range of the absolute corrected prediction error value; and a Golomb-Rice encoding unit for encoding the absolute corrected prediction error value by dividing it into a variable length code part and the fixed length code part.