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1. (WO2018199347) COMPLEX SPEAKER SYSTEM CAPABLE OF SIMULTANEOUSLY OUTPUTTING ULTRA-DIRECTIONAL AND NON-DIRECTIONAL SIGNALS

Pub. No.:    WO/2018/199347    International Application No.:    PCT/KR2017/004375
Publication Date: Fri Nov 02 00:59:59 CET 2018 International Filing Date: Wed Apr 26 01:59:59 CEST 2017
IPC: H04R 3/00
H04R 17/00
H03G 5/22
H03F 1/02
H03F 1/32
Applicants: JDSOLUTION CO.,LTD
주식회사 제이디솔루션
Inventors: JE, Young Ho
제영호
CHO, Mun Chel
조문철
LIM, Yong Muk
임용묵
Title: COMPLEX SPEAKER SYSTEM CAPABLE OF SIMULTANEOUSLY OUTPUTTING ULTRA-DIRECTIONAL AND NON-DIRECTIONAL SIGNALS
Abstract:
The present invention provides a complex speaker system comprising an ultra-directional speaker system, capable of simultaneously outputting ultra-directional and non-directional signals, the complex speaker system comprising: a signal input unit for receiving an audio input signal to be amplified; an A/D converter for converting an analog input signal into a digital signal; a signal delay unit for delaying a non-directional signal by the amount of time a signal outputted from the ultra-directional speaker system is delayed, and outputting the delayed non-directional signal; a pulse width modulator for pulse-width-modulating the signal outputted from the signal delay unit; and a non-directional amplifier for performing non-directional-amplification on the pulse-width-modulated signal and outputting the same.