Patent ID: 7940938
Filing Date: 2011-05-10
Classification: H04R,H04S

Abstract:
1. A sound reproducing apparatus comprising: multiple-channel speakers; a modulator that generates multiple-channel digital driving signals modulated based on respective multiple-channel audio signals; a multiplexer comprising a multiplexing section that time-division multiplexes the multiple-channel digital driving signals and a power amplifier that amplifies and outputs the time-division multiplexed multi-channel digital driving signals; a plurality of switches that selectively turn on/off respective ones of said multiple-channel speakers; and a switch controller that provides control to selectively turn on/off said plurality of switches such that the multiple-channel digital driving signals output from said multiplexer are supplied to respective speakers of corresponding channels among said multiple-channel speakers, wherein said multiplexer outputs each of the multi-channel digital driving signals next after an identifier indicative of a corresponding channel, and said switch controller causes a switch corresponding to a speaker of the channel identified by the identifier among said plurality of switches to be turned on, after keeping all of said plurality of switches off for a predetermined time period during which the identifier is output.