Patent ID: 8681998
Filing Date: 2014-03-25
Classification: H03G,H04N

Abstract:
1. A volume correction device comprising: a variable gain device that controls a gain given to an input audio signal, according to a gain control signal; a consecutive relevant sounds interval detection device that detects a consecutive relevant sounds interval, during which a group of temporally adjoining consecutive relevant sounds is present, in the input audio signal; a mean level detection device that detects a first mean level of the input audio signal attained during the consecutive relevant sounds interval detected by the consecutive relevant sounds interval detection device, in which a time constant for mean level detection is set to a smaller value during a leading period of the consecutive relevant sounds interval than during a remaining period of the consecutive relevant sounds interval; and a gain control signal production device that produces the gain control signal, by which the gain to be given to the input audio signal is controlled, so that the first mean level detected by the mean level detection device will be equal to a reference level, and for feeding the produced gain control signal to the variable gain device.