DEVICE AND METHOD FOR STORING MUSICAL SOUND WAVEFORM DATA, AND DEVICE AND METHOD FOR REPRODUCING MUSICAL SOUND WAVEFORM DATA

摘要

PROBLEM TO BE SOLVED: To compress/store the musical sound waveform data and to reduce storage capacity by showing sizes of adjacent points on coordinates as coordinate values and converting the coordinate values to the values on the axes of coordinates rotating the axes of coordinates of this coordinates. ;SOLUTION: The musical sound waveform data are inputted from the outside to a musical sound waveform input part 7, and the sizes of the adjacent points among respective points of the musical sound waveform data are shown on the coordinates as the coordinate values, and the coordinate values are synthesized/compressed to the values on the axes of coordinates rotating the axes of coordinates of this coordinates to be converted. The converted coordinate values are written in order in a program/data storage part 3 to be stored. The musical sound waveform data written in the program/data storage part 3 to be stored are read out by a musical sound waveform reproducing part 8. Then, the read out musical sound waveform data are inversely converted to the values on the original axes of coordinates before rotating, and these values are separated and expanded as the sizes of the adjacent points of the original musical sound waveform data to be reproduced/outputted.;COPYRIGHT: (C)2000,JPO