Patent ID: 9166544
Filing Date: 2015-10-20
Classification: H03G

Abstract:
1. A volume control apparatus, comprising: a first volume controller for controlling a volume level of an analog audio signal to be input to a first volume level set by a main controller; an analog-digital converter for converting the analog audio signal from the first volume controller into a digital audio signal; a second volume controller for controlling a volume level of the digital audio signal from the analog-digital converter to a second volume level set by the main controller; an amplifier for amplifying an audio signal from the second volume controller; a detector for detecting whether the audio signal output from the amplifier has a set value or more, and when determining as being the set value or more, outputting a signal representing the set value or more to the main controller; an input section into which an instruction for increasing a volume level is input by a user's operation; and the main controller for, when the instruction for increasing the volume level is input by the user's operation and the signal representing the set value or more is output from the detector, not increasing the volume levels of the first volume controller and the second volume controller, and when the signal representing the set value or more is not output from the detector and the second volume level has a predetermined value, increasing the first volume level, and when the signal representing the set value or more is not output from the detector and the second volume level is less than the predetermined value, increasing the second volume level.