公开(公告)号：US07925008B2

公开(公告)日：2011-04-12

申请号：US11825301

申请日：2007-07-05

申请人： Toru Hirai ,  Mikio Tohyama ,  Hiraku Okumura ,  Yoshikazu Honji ,  Hiroshi Iriyama ,  Koji Niimi

发明人： Toru Hirai ,  Mikio Tohyama ,  Hiraku Okumura ,  Yoshikazu Honji ,  Hiroshi Iriyama ,  Koji Niimi

IPC分类号： H04M9/08

CPC分类号： H04R3/02 ,  H04M9/082

摘要： Stereo sound signals are reproduced directly from loudspeakers (SP(L), SP(R)). By using a sum signal and a difference signal of the stereo sound signals as a reference signal, and according to a cross spectrum calculation of the reference signal with a microphone-collected sound signal, calculation is performed to obtain transfer functions of four sound transfer systems between the loudspeakers (SP(L), SP(R)) and microphones (MC(L), MC(R)). The transfer functions obtained are subjected to inverse Fourier transform to obtain impulse responses, which are set in filter means (40-1 to 40-4) to create echo cancel signals and perform echo canceling. This solves the problem of an indefinite coefficient in the echo cancel technique of a multi-channel sound signal.

公开(公告)号：US07403609B2

公开(公告)日：2008-07-22

申请号：US10705794

申请日：2003-11-07

申请人： Toru Hirai ,  Mikio Tohyama ,  Hiraku Okumura ,  Yoshikazu Honji ,  Hiroshi Iriyama ,  Koji Niimi

发明人： Toru Hirai ,  Mikio Tohyama ,  Hiraku Okumura ,  Yoshikazu Honji ,  Hiroshi Iriyama ,  Koji Niimi

IPC分类号： H04M9/08

CPC分类号： H04R3/02 ,  H04M9/082

摘要： Stereo sound signals are reproduced directly from loudspeakers (SP(L), SP(R)). By using a sum signal and a difference signal of the stereo sound signals as a reference signal, and according to a cross spectrum calculation of the reference signal with a microphone-collected sound signal, calculation is performed to obtain transfer functions of four sound transfer systems between the loudspeakers (SP(L), SP(R)) and microphones (MC(L), MC(R)). The transfer functions obtained are subjected to inverse Fourier transform to obtain impulse responses, which are set in filter means (40-1 to 40-4) to create echo cancel signals and perform echo canceling. This solves the problem of an indefinite coefficient in the echo cancel technique of a multi-channel sound signal.

摘要翻译： 立体声信号直接从扬声器（SP（L），SP（R））再现。 通过使用立体声信号的和信号和差分信号作为参考信号，并且根据具有麦克风收集的声音信号的参考信号的交叉频谱计算，执行计算以获得四个声音传送系统的传递函数 扬声器（SP（L），SP（R））和麦克风（MC（L），MC（R））之间。 所获得的传递函数进行傅里叶逆变换以获得脉冲响应，其被设置在滤波器装置（40-1至40-4）中以产生回波消除信号并执行回波消除。 这解决了多声道声音信号的回波消除技术中不确定系数的问题。

公开(公告)号：US07230525B2

公开(公告)日：2007-06-12

申请号：US11178604

申请日：2005-07-12

申请人： Toru Hirai

发明人： Toru Hirai

IPC分类号： B60C23/00

CPC分类号： B60C23/0416 ,  B60C23/061

摘要： A tire air pressure monitoring system is provided that comprises a transmitting device, a receiving device, and a tire identification number registration device. The transmitting device is mounted on a wheel of a vehicle, and configured and arranged to wirelessly transmit a signal indicative of at least tire air pressure information of a tire coupled to the wheel and a tire identification number assigned to the wheel. The receiving device is mounted on the vehicle, and configured and arranged to receive the signal transmitted from the transmitting device. The tire identification number registration device is configured to estimate a position of the wheel with respect to the vehicle based on correlation information corresponding to an extent of a correlation between strength of the signal and a tire rotational angle of the wheel, and to register the tire identification number with the position of the wheel.

摘要翻译： 提供了一种轮胎气压监测系统，其包括发送装置，接收装置和轮胎识别号码登记装置。 发送装置安装在车辆的车轮上，并且被构造和布置成无线地传送指示至少轮胎联接到轮胎的轮胎气压信息的信号和分配给车轮的轮胎识别号码。 接收装置安装在车辆上，并且被配置和布置成接收从发送装置发送的信号。 轮胎识别号登记装置被配置为基于与信号的强度和车轮的轮胎旋转角度之间的相关程度相对应的相关信息来估计车轮相对于车辆的位置，并且将轮胎 识别号码与车轮的位置。

公开(公告)号：US07130428B2

公开(公告)日：2006-10-31

申请号：US10025179

申请日：2001-12-19

申请人： Toru Hirai ,  Fukushi Kawakami ,  Yasushi Shimizu ,  Yoshikazu Honji ,  Masahiro Ikeda ,  Mikio Tohyama

发明人： Toru Hirai ,  Fukushi Kawakami ,  Yasushi Shimizu ,  Yoshikazu Honji ,  Masahiro Ikeda ,  Mikio Tohyama

IPC分类号： H04B3/20

CPC分类号： H04S1/002 ,  H03G3/32 ,  H03G5/22

摘要： Sound picked up by a microphone of a first sound field is reproduced by a speaker of a second sound field, and a sound picked up by a microphone of the second sound field is reproduced by the speaker of the first sound field. Sound pressure detection section detects a sound pressure of a sound present in the second (or first) sound field picked up by the microphone of the second (or first) sound field, other than a sound reproduced by the speaker of the first (or second) sound field. Other sound pressure detection section detects a sound pressure with which the sound picked up by the microphone of the second (or first) sound field and reproduced by the speaker of the first (or second) sound field is picked up by the microphone of the first (or second) sound field. Sound-pressure-difference detection section adjusts a gain of an automatic gain adjustment section in such a manner that the two detected sound pressures assume a predetermined relationship. Thus, any sound picked up in one of the first and second sound fields can be reproduced in the other sound field with an enhanced sense of unity and connection between the two sound fields.

摘要翻译： 由第一声场的麦克风拾取的声音由第二声场的扬声器再现，并且由第二声场的麦克风拾取的声音由第一声场的扬声器再现。 声压检测部检测由第二（或第一）声场的麦克风拾取的第二（或第一）声场中存在的声音的声压，而不是由第一（或第二）声音的扬声器再现的声音 ）声场。 其他声压检测部分检测由第一（或第一）声场的麦克风拾取的声音并由第一（或第二）声场的扬声器再现的声音由第一（或第二）声场的麦克风拾取的声压 （或第二）声场。 声压差检测部以这样的方式调节自动增益调整部的增益，使得两个检测到的声压呈现预定关系。 因此，在第一声场和第二声场之一中拾取的任何声音都可以在另一个声场中被再现，具有增强的两声场之间的一致性和连接感。