METHOD FOR COMPRESSING/EXTENDING ANALOG WAVE

摘要

PROBLEM TO BE SOLVED: To analyze a frequency by completely making the frequency analysis into narrow band and making it coincident with the limits of the five senses such as hearing and to further improve compressibility by performing most compressed extraction in order to improve feature extraction up to the recognizing levels of the five senses such as hearing concerning a method for compressing and extending an analog wave while using a narrow band filter. SOLUTION: The ratio of a central frequency and a pass/cutoff band frequency is provided with a low frequency while using the bulk resonance or the like of a crystal filter or SAW filter and the narrow band filter that physical phenomenon is utilized and by sharing the entire data channels of all the octaves with the number used for data channels on the highest frequency side of a peak octave a huge number of multi-channel narrow band filters are provided with a little filters.