SOUND VOLUME CONTROL UNIT, METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a technique to control sound volume without changing the predetermined feature amounts of the sound such as frequencies as much as possible. SOLUTION: The inputted sound is divided into frames of a certain time length. The outer shape value which is the feature amount representing the sound volume in a frame is calculated for each frame. By defining the sound section consisting of the preset number B2of the frames or more between the silent frames each continuing for the preset number B1or more as a first sound section, and removing some of the outer shape values of the frames constituting the first sound section starting from the larger one, and the maximum remaining one is decided to be the outer shape value of the first sound section. The information for adjusting the inputted sound volume (the first volume control information, hereinafter) is decided so that the obtained outer shape value of the first sound section is within the preset range, and the sound volume is adjusted by using a first volume control instruction means to output and the outputted first volume control information. COPYRIGHT: (C)2009,JPO&INPIT