ENCODING DEVICE, DECODING DEVICE, ENCODING METHOD, DECODING METHOD, ENCODING PROGRAM, DECODING PROGRAM AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To reduce a coding amount by attaining a high encoding efficiency for a signal sequence. SOLUTION: The encoding device of the invention includes at least a signal extraction section and a separation signal sequence generation section. A signal extraction section collects (P+n×T)-th signals from input signal sequence Z at an initial phase P and an interval T. The separation signal sequence generation section obtains a maximum digit A in the (P+n×T)-th signals in the signal sequence Z, and generates a sequence (a separation signal sequence X) of a signal composed of the digits of the maximum digit A or less of the (P+n×T)-th signals in the signal sequence Z. The decoding device of the invention receives at least the initial phase P, the interval T, the maximum digit A and the separation signal sequence X and includes at least a restoration section. The restoration section restores each signal of the separation signal sequence X to the (P+n×T)-th signals in the signal sequence Z to be decoded by using the maximum digit A. COPYRIGHT: (C)2009,JPO&INPIT