公开(公告)号：JP2002344431A

公开(公告)日：2002-11-29

申请号：JP2001144604

申请日：2001-05-15

Applicant: TOA CORP

Inventor： YOSHIKAWA SUSUMU

IPC: G10L19/00 ,  H04L1/00

Abstract: PROBLEM TO BE SOLVED: To provide a digital receiver which is free from generating noises, even if receiving a packet containing data for which an error cannot be corrected. SOLUTION: A receiver 1 in a digital communication system successively transmitting digital data by packets is provided with a data processing means 12 and an error detecting means 13. When the means 13 detects that the packet at a certain time point is an unnecessary packet containing digital data having errors, the means 12 performs data processing, so the digital data in the packet received, immediately before the unnecessary packet is gradually decreased to a prescribed level; the digital data in the unnecessary packet is decreased to the above prescribed level; and the digital data in the packet received immediately after the unnecessary packet is gradually increased from the above prescribed level.

公开(公告)号：JP2002262278A

公开(公告)日：2002-09-13

申请号：JP2001058660

申请日：2001-03-02

Applicant: TOA CORP

Inventor： YOSHIKAWA SUSUMU

IPC: H04N7/18

Abstract: PROBLEM TO BE SOLVED: To provide a supervisory system that quickly obtains an image around a place at which a transmitter makes transmission. SOLUTION: Image pickup devices 2a-2h respectively pick up images of different supervisory areas 4a-4h. Antennas 12a-12h are placed to the supervisory areas 4a-4h to receive a wireless signal from the transmitter moving through the supervisory areas 4a-4h. A center device 8 selects an antenna with the highest reception level among the antennas 12a-12h. The center device 8 selects an image pickup signal from an image pickup device picking up a supervisory area corresponding to the selected antenna and displays the signal on a monitor 40.

公开(公告)号：JP2002262275A

公开(公告)日：2002-09-13

申请号：JP2001058657

申请日：2001-03-02

Applicant: TOA CORP

Inventor： YAMADA AKIHIRO ,  YOSHIKAWA SUSUMU

IPC: H04N5/225 ,  H04N5/232 ,  H04N7/18

Abstract: PROBLEM TO BE SOLVED: To provide a supervisory system where an image pickup device surely transmits a signal such as a voice signal and a sensor signal denoting a state of a supervisory area to a supervisory room together with an image pickup signal without the need for new installation of a transmission line. SOLUTION: The image pickup device 2 placed to pick up an image of a supervisory area transmits the image pickup signal picking up the image of the supervisory area through a coaxial cable 6. A transmitter 12 placed in the supervisory area transmits a modulation signal modulated by a voice signal in the supervisory area. A receiver 16 placed in the vicinity of the image pickup device 2 receives the modulation signal to generate a received signal. The image pickup device 2 transmits a transmission signal on the basis of the received signal to the coaxial cable 6.

公开(公告)号：JP2002262271A

公开(公告)日：2002-09-13

申请号：JP2001056592

申请日：2001-03-01

Applicant: TOA CORP

Inventor： YAMADA AKIHIRO ,  YOSHIKAWA SUSUMU

IPC: H04N7/18

Abstract: PROBLEM TO BE SOLVED: To provide a supervisory system where a loss of a wireless communication signal by a coaxial cable is compensated in the case of transmitting the wireless communication signal with a base band image pickup signal by the coaxial cable. SOLUTION: An image pickup device 2 picks up a supervisory area to generate a base band image pickup signal. The image pickup device 2 transmits the base band image pickup signal to a base station placed apart from the supervisory area through a coaxial cable 6. The base station is provided with a receiver 16 and the supervisory area is provided with a transmitter 8, and they make communication with a high frequency communication signal whose frequency differs from a frequency band of the base band image pickup signal. The high frequency communication signal synthesized with the base band image pickup signal is transmitted through the coaxial cable 6. A booster 18 is interposed in the coaxial cable 6. The booster 18 amplifies only the high frequency signal to compensate the attenuation of the high frequency signal in the coaxial cable.

公开(公告)号：JP2002027597A

公开(公告)日：2002-01-25

申请号：JP2000202066

申请日：2000-07-04

Applicant: TOA CORP

Inventor： YOSHIKAWA SUSUMU ,  ASAYAMA SHIRO

IPC: H04R1/32 ,  H04R3/00 ,  H04R25/00

Abstract: PROBLEM TO BE SOLVED: To provide a microphone with a guide loop for transmitting a voice signal to the receiver of a hearing aid or the like by magnetic field coupling. SOLUTION: This microphone 10 with a guide loop equipped with a microphone element 3 for receiving a voice and a guide loop 2 to be driven by a signal corresponding to an output from the microphone element 3 for generating a magnetic field is provided with a main body 1 incorporating an amplifier circuit for amplifying the output of the microphone element 3, an output coil connected to the output of the amplifier circuit, and a means for magnetically coupling the guide loop 2 to the output coil, and the guide loop 2 is mounted on the main body 1.

公开(公告)号：JP2001285201A

公开(公告)日：2001-10-12

申请号：JP2000100936

申请日：2000-04-03

Applicant: TOA CORP

Inventor： YOSHIKAWA SUSUMU

IPC: H04N5/225 ,  H04B10/00 ,  H04B10/11 ,  H04B10/112 ,  H04B10/272 ,  H04B10/524 ,  H04B10/54 ,  H04B10/556 ,  H04N5/232 ,  H04B10/105 ,  H04B10/10 ,  H04B10/22

Abstract: PROBLEM TO BE SOLVED: To provide an optical information system that transmits prescribed information such as image information by using a medium of a prescribed light such as an infrared ray and uses only one receiver with respect to transmitters so as to realize optical transmission with high reliability. SOLUTION: Each of transmitters 6 is provided with an individual identification number. A receiver 8 transmits an optical control signal including an identification signal denoting the selection of desired transmitters 6 to each of the transmitters 6. Each of the transmitters 6 compares and collates the identification signal sent from the receiver 8 with their own identification numbers, and only when they are coincident, an image signal of, e.g. a camera 1 is converted into an infrared ray image signal and transmitted to the receiver 8. Thus, the receiver 8 receives the optical image signal sent from the desired transmitters 6 and displays the image on, e.g. a monitor 2.

公开(公告)号：JP2006211380A

公开(公告)日：2006-08-10

申请号：JP2005021708

申请日：2005-01-28

Applicant: Toa Corp ,  ティーオーエー株式会社

Inventor： MATSUMOTO YASUSHI ,  YOSHIKAWA SUSUMU

IPC: H04L7/00 ,  G06F13/00

Abstract: PROBLEM TO BE SOLVED: To prevent occurrence of output deviation between receiver terminals in distant locations by accurately matching time information managed in a plurality of receiver terminals. SOLUTION: In the digital data transmission system, a time stamp is added to digital data transmitted from a transmitter terminal, and the digital data are transmitted and reproduced, in each of a plurality of receiver terminals, in a reproduction timing based on the time stamp added to the received digital data and a set delay time. Time information managed at a receiver terminal side is made into accurate time information based on external radio waves, thereby preventing deviation of reproduction timings in the receiver terminals. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：通过精确地匹配在多个接收机终端中管理的时间信息来防止在远处的接收机终端之间发生输出偏差。 解决方案：在数字数据传输系统中，将时间戳添加到从发射机终端发送的数字数据，并且数字数据在多个接收机终端中的每一个中以基于 添加到接收到的数字数据的时间戳和设定的延迟时间。 在接收机终端侧管理的时间信息被制成基于外部无线电波的精确时间信息，从而防止接收机终端中再现定时的偏差。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2006094111A

公开(公告)日：2006-04-06

申请号：JP2004276755

申请日：2004-09-24

Applicant: Toa Corp ,  ティーオーエー株式会社

Inventor： YOSHIKAWA SUSUMU

IPC: H04B10/11 ,  H04B10/112 ,  H04B10/40 ,  H04B10/50 ,  H04B10/60 ,  H04B10/69 ,  H04R1/04

Abstract: PROBLEM TO BE SOLVED: To enable an apparatus to flexibly conform with various kinds of setting environments ranging from a small place to a large place. SOLUTION: An infrared ray emitted from a wireless microphone 12 is received by each of a light-receiving unit 16 and an external light receiving unit 30, and converted into an FM signal. The FM signal after being converted by the unit 16 is inputted into a mixing circuit 22 via a coaxial cable 20, and the FM signal after being converted by the unit 30 is inputted into the mixing circuit 22 via coaxial cables 32 and 26. The mixing circuit 22 mixes each of the inputted FM signals to transmit the mixed signals to a poststage circuit. Meanwhile, although a delay occurs in the FM signal transmitted through the coaxial cable 32 of the unit 30 side, the amount of the delay caused by the coaxial cable 32 is compensated by a loop-like portion 24 formed of the coaxial cable 20 of the unit 16 side. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：使设备灵活地符合从小地方到大地方的各种设置环境。 解决方案：从无线麦克风12发射的红外线由光接收单元16和外部光接收单元30中的每一个接收，并被转换成FM信号。 由单元16转换后的FM信号通过同轴电缆20输入到混合电路22中，并且由单元30转换后的FM信号通过同轴电缆32和26输入到混合电路22中。混合 电路22混合输入的每个FM信号以将混合信号发送到后级电路。 同时，虽然在通过单元30侧的同轴电缆32传输的FM信号中发生延迟，但是由同轴电缆32引起的延迟量由由同轴电缆32的同轴电缆20形成的环状部分24补偿 单元16侧。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2006033573A

公开(公告)日：2006-02-02

申请号：JP2004211401

申请日：2004-07-20

Applicant: Toa Corp ,  ティーオーエー株式会社

Inventor： YOSHIKAWA SUSUMU

IPC: H03F1/02 ,  H03F3/08

Abstract: PROBLEM TO BE SOLVED: To provide an amplifier circuit with high gain, while achieving low power consumption. SOLUTION: A light receiving circuit 10 includes three amplifier circuits, i.e., a pre-amplifier circuit 28, an emitter follower circuit 40, and a high frequency amplifier circuit 42. The three amplifier circuits 28, 40, 42 are connected in multistage, so as to acquire extremely high gain as the whole light receiving circuit 10. The respective amplifier circuits 28, 40, 42 are mutually serially connected in terms of power source route, so that a power source current Ic for driving the respective amplifier circuits 28, 40, 42 is made to consistently flow in the circuits 28, 40, 42. Consequently, power consumption in the respective amplifier circuits 28, 40, 42 is suppressed compared with that in a structure where the power source current is supplied in parallel with respect to the respective amplifier circuits 28, 40, 42, for example. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：提供具有高增益的放大器电路，同时实现低功耗。 解决方案：光接收电路10包括三个放大器电路，即前置放大器电路28，射极跟随器电路40和高频放大器电路42.三个放大器电路28,40,42连接在 多级，以获得极高的增益作为整个光接收电路10.各个放大器电路28,40,42在电源路径方面相互串联连接，从而用于驱动各个放大器电路的电源电流Ic 28,40,42在电路28,40,40中始终流动。因此，与并联提供电源电流的结构相比，抑制了各个放大器电路28,40,42的功耗。 相对于各个放大器电路28,40,42。 版权所有（C）2006，JPO＆NCIPI

公开(公告)号：JP2005328161A

公开(公告)日：2005-11-24

申请号：JP2004142447

申请日：2004-05-12

Applicant: Toa Corp ,  ティーオーエー株式会社

Inventor： YOSHIKAWA SUSUMU

IPC: H04B10/11 ,  H04B10/112 ,  H04B10/2507 ,  H04B10/10 ,  H04B10/02 ,  H04B10/105 ,  H04B10/18 ,  H04B10/22

Abstract: PROBLEM TO BE SOLVED: To exclude the effect of a noise source such as a plasma display apparatus with operations simpler than those of prior arts. SOLUTION: A terminal 18 forms an entire communication area 94 by a forward communication area 90 and an upward communication area 92. Each of the two communication areas 90, 92 can optionally be validated or invalidated by manual operations of a light receiving power switch and a light transmission power switch of a dip switch configuration built in the terminal 18. Thus, when a noise source such as the plasma display apparatus exists in one of the communication areas 90, 92, the effect due to the noise source can be excluded by invalidating the communication area 90 or 92. COPYRIGHT: (C)2006,JPO&NCIPI

Abstract translation: 要解决的问题：排除诸如等离子体显示装置的噪声源的作用，其操作比现有技术更简单。 解决方案：终端18由正向通信区域90和向上通信区域92形成整个通信区域94.两个通信区域90,92中的每一个可以可选地通过光接收功率的手动操作被验证或无效 开关和内置在端子18中的DIP开关配置的光传输电源开关。因此，当在通信区域90,92之一中存在诸如等离子体显示装置之类的噪声源时，由噪声源产生的影响可以是 通过使通信区域90或92无效排除。版权所有（C）2006年，JPO＆NCIPI