INFORMATION PROVIDING SYSTEM USING ULTRASONIC SPEAKER TRANSMITTING DIFFERENTIAL SIGNAL

The present invention, with respect to an information providing system that uses an ultrasonic speaker to modulate a signal in an audible frequency bandwidth to a carrier wave in an ultrasonic bandwidth and provide information to a receiving terminal through the ultrasonic speaker, provides an infor...

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Bibliographic Details
Main Authors JE, Young Ho, LIM, Yong Muk
Format Patent
LanguageEnglish
French
Korean
Published 01.12.2016
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Summary:The present invention, with respect to an information providing system that uses an ultrasonic speaker to modulate a signal in an audible frequency bandwidth to a carrier wave in an ultrasonic bandwidth and provide information to a receiving terminal through the ultrasonic speaker, provides an information providing system using an ultrasonic speaker that transmits a differential signal, the system characterized by comprising: a differential signal generating module that divides signal frequencies in an audible frequency bandwidth and generates a differential pair signal; and an encoder including a signal processing module that converts digital signals generated by the differential signal generating module to generate analog signals. La présente invention, en lien avec un système de fourniture d'informations qui utilise un haut-parleur à ultrasons pour moduler un signal dans une largeur de bande de fréquence audible à une onde porteuse dans une bande passante à ultrasons et fournir des informations à un terminal de réception via le haut-parleur à ultrasons, fournit un système de fourniture d'informations utilisant un haut-parleur à ultrasons qui transmet un signal différentiel. Le système est caractérisé en ce qu'il comprend : un module de génération de signal différentiel qui divise des fréquences de signal dans une largeur de bande de fréquence audible et génère une paire de signaux différentiels ; et un encodeur comprenant un module de traitement de signaux qui convertit des signaux numériques générés par le module de génération de signal différentiel de sorte à générer des signaux analogiques. 본 발명은 가청주파수 대역의 신호를 초음파 대역의 반송파로 변조하여 초음파 스피커를 통해 수신 단말기에 정보를 제공하는 초음파 스피커를 이용한 정보제공시스템에 있어서, 가청주파수 대역의 신호 주파수를 분할하여 차동 페어(pair) 신호를 생성하는 차동신호생성모듈과, 차동신호생성모듈에서 생성된 디지털 신호를 아날로그 신호로 변환하고 발생시키는 신호처리모듈을 포함하는 인코더를 포함하는 것을 특징으로 하는 차동신호를 송신하는 초음파 스피커를 이용한 정보제공시스템을 제공한다.
Bibliography:Application Number: WO2016KR04837