公开(公告)号：US20130010979A1

公开(公告)日：2013-01-10

申请号：US13620748

申请日：2012-09-15

申请人： Tomio Takara ,  Hiroshi Suzuki ,  Takashige Tsukuma ,  Yoshimaru Maruno ,  Ichiro Okuyama

发明人： Tomio Takara ,  Hiroshi Suzuki ,  Takashige Tsukuma ,  Yoshimaru Maruno ,  Ichiro Okuyama

IPC分类号： H04B3/00

CPC分类号： H04B11/00 ,  G10L19/093

摘要： Where information is to be conveyed as acoustic waves, embodiments of the present invention provide a transmitter capable of causing acoustic waves that convey information to be not easily perceived by the human ear. A transmitter, being an apparatus that converts various types of encoded information into acoustic wave(s) in the audible spectrum and carries out transmission thereof, comprises microphone(s) that cause ambient sound(s) from location(s) at which acoustic wave(s) is/are transmitted to be input as ambient sound signal(s); peak frequency detector(s) that detect, within ambient sound signal(s), peak frequency or frequencies of major constituent(s) of ambient sound(s); carrier wave generator(s) that generate carrier waves at a plurality of frequencies that are natural number multiples of peak frequency or frequencies and that can be used to mask ambient sound(s); and modulator(s) that modulate a plurality of carrier waves with baseband signal(s).

公开(公告)号：US08594340B2

公开(公告)日：2013-11-26

申请号：US13620748

申请日：2012-09-15

申请人： Tomio Takara ,  Hiroshi Suzuki ,  Takashige Tsukuma ,  Yoshimaru Maruno ,  Ichiro Okuyama

发明人： Tomio Takara ,  Hiroshi Suzuki ,  Takashige Tsukuma ,  Yoshimaru Maruno ,  Ichiro Okuyama

IPC分类号： H04B3/00 ,  H04B5/00 ,  H04R27/00

CPC分类号： H04B11/00 ,  G10L19/093

摘要： Where information is to be conveyed as acoustic waves, embodiments of the present invention provide a transmitter capable of causing acoustic waves that convey information to be not easily perceived by the human ear. A transmitter, being an apparatus that converts various types of encoded information into acoustic wave(s) in the audible spectrum and carries out transmission thereof, comprises microphone(s) that cause ambient sound(s) from location(s) at which acoustic wave(s) is/are transmitted to be input as ambient sound signal(s); peak frequency detector(s) that detect, within ambient sound signal(s), peak frequency or frequencies of major constituent(s) of ambient sound(s); carrier wave generator(s) that generate carrier waves at a plurality of frequencies that are natural number multiples of peak frequency or frequencies and that can be used to mask ambient sound(s); and modulator(s) that modulate a plurality of carrier waves with baseband signal(s).

摘要翻译： 在将信息作为声波传送的情况下，本发明的实施例提供能够引起声波的传送器，该声波传达信息不容易被人耳感知。 作为将各种类型的编码信​​息转换成可听频谱中的声波并执行其发射的装置的发射机包括从声波的位置引起环境声音的麦克风， （s）被传送以作为环境声音信号输入; 峰值频率检测器，其在环境声音信号中检测环境声音的主要成分的峰值频率或频率; 在多个频率上产生载波的载波发生器，其为峰值频率或频率的自然数倍，并且可用于屏蔽环境声音; 以及用基带信号调制多个载波的调制器。