METHOD, DEVICE, PROGRAM AND RECORDING MEDIUM FOR COMPRESSING SIGNAL, AND METHOD, DEVICE, PROGRAM AND RECORDING MEDIUM FOR RETRIEVING SIGNAL

摘要

PROBLEM TO BE SOLVED: To provide a signal compressing device capable of performing signal compression suitable to property of a signal and representing a signal series with a smaller information mount. SOLUTION: The device is equipped with: an initial sub-signal creation section (1) which creates, from an original signal, sub-signals of shorter length than the original signal; a sub-signal constitution selection section (2) which, for the sub-signals produced by the initial sub-signal creation section (1), prunes sub-signal candidates to those for which the amount of data is less than for the original signal; a sub-signal re-creation section (3) which determines a created sub-signal which is actually to be used, using the created sub-signal candidates produced by the sub-signal constitution selection section (2); a compression mapping determination section (4) which determines, from the sub-signals produced by the sub-signal re-creation section (3), a mapping for calculation of a compressed signal; and a signal compression section (5) which calculates a compressed signal corresponding to the sub-signals obtained by the sub-signal re-creation section (3), based upon the mapping obtained by the compression mapping determination section (4). COPYRIGHT: (C)2004,JPO&NCIPI