The prediction error value operation means operation the prediction error value for the data of the said attention pixel

摘要

PROBLEM TO BE SOLVED: To provide a data encoding device and the like whose processing time is short, necessary memory capacity is small, and which can exert a high compression performance.;SOLUTION: A data encoding device 1 is provided with an estimator 11 which calculates an estimated value of target data based on data already read, a subtractor 12 which calculates an estimated error value which is an error between the target data and the estimated value, a filter 13 and a subtractor 14 which calculate a corrected estimated error value for the target data by filtering the estimated error value for the noticed data and an estimated error value obtained in the past, an absolute value processor 15 which converts the corrected estimated error value into an absolute value, a "k" parameter determining portion 18 which determines an encoding length of a fixed length encoder based on flatness of the absolute corrected estimated error value and a dynamic range, and a Golomb-Rice encoding section 19 which encodes by dividing the absolute corrected estimated error value into a variable length encoder and a fixed length encoder.;COPYRIGHT: (C)2007,JPO&INPIT