公开(公告)号：JP2012124847A

公开(公告)日：2012-06-28

申请号：JP2010276024

申请日：2010-12-10

Applicant: Toa Corp ,  ティーオーエー株式会社

Inventor： EJIMA KENICHI ,  OGURA TAKASHI ,  MORIGUCHI KOJI

IPC: H04L9/08 ,  H04R1/06

CPC classification number: H04R3/00 ,  H04L9/00 ,  H04L63/0428 ,  H04R1/08 ,  H04R2420/07 ,  H04W12/02

Abstract: PROBLEM TO BE SOLVED: To provide a wireless microphone system that can suppress interception by a receiver of a third party with simple structure.SOLUTION: A system comprises: a microphone transmitting a transmission signal including a voice signal and additional information for processing the voice signal; and a wireless receiver receiving the transmission signal and processing the voice signal of the transmission signal based on the additional information. The system has: a normal communication mode in which communication is performed by using a normal unique word UWN being set in advance in the microphone and the wireless receiver; a secrecy setting mode in which a secrecy unique word UWX differing from the normal unique word UWN is set in the microphone and is transmitted from the microphone to the wireless receiver; and a secrecy communication mode in which the communication is performed by using the secrecy unique word UWX set in the microphone and the wireless receiver by the secrecy setting mode.

Abstract translation: 要解决的问题：提供一种无线麦克风系统，其能够以简单的结构抑制第三方的接收器的拦截。 解决方案：系统包括：麦克风，发送包括语音信号的传输信号和用于处理语音信号的附加信息; 以及无线接收器，其接收所述发送信号，并且基于所述附加信息来处理所述发送信号的语音信号。 该系统具有：正常通信模式，其中通过使用在麦克风和无线接收机中预先设置的普通唯一字UWN来进行通信; 保密设置模式，其中在麦克风中设置与正常唯一字UWN不同的秘密唯一字UWX，并从麦克风发送到无线接收器; 以及保密通信模式，其中通过使用通过保密设置模式在麦克风和无线接收机中设置的秘密唯一字UWX进行通信。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2012119939A

公开(公告)日：2012-06-21

申请号：JP2010267893

申请日：2010-11-30

Applicant: Toa Corp ,  ティーオーエー株式会社

Inventor： EJIMA KENICHI ,  MORIGUCHI KOJI

IPC: H04B1/16 ,  H04R1/06 ,  H04W72/08

Abstract: PROBLEM TO BE SOLVED: To provide a wireless receiver and a wireless microphone system capable of setting a channel with less interference automatically.SOLUTION: The wireless receiver extracts an external use channel to be used by an external device, and an interference channel which may interfere with at least one of the external use channels being used by the wireless receiver. Then, the wireless receiver extracts all reception channels except the external use channels and interference channels within reception channels as settable channels.

Abstract translation: 要解决的问题：提供能够自动设置较少干扰的信道的无线接收机和无线麦克风系统。 解决方案：无线接收器提取外部设备使用的外部使用信道，以及可能干扰无线接收机使用的至少一个外部使用信道的干扰信道。 然后，无线接收机将除接收通道外的外部使用信道和干扰信道之外的所有接收信道提取为可设置的信道。 版权所有（C）2012，JPO＆INPIT

公开(公告)号：JP2003198517A

公开(公告)日：2003-07-11

申请号：JP2001401524

申请日：2001-12-28

Applicant: TOA CORP

Inventor： TANAKA TOMOHISA ,  EJIMA KENICHI ,  SHIBUYA TAKAKO ,  KEIJO NOBUYUKI

IPC: H04L7/00

Abstract: PROBLEM TO BE SOLVED: To remove distortion depending on jitter or the responsiveness of PLL on a radio transmission line. SOLUTION: On the basis of a digital modulated signal and a first reference signal from a first reference signal source 64, a signal processing part 62 reproduces a transmission clock signal and reproduces digital audio data on the basis of this reproduced transmission clock signal. Synchronously with the reproduced transmission clock signal, the digital audio data are inputted to a sampling rate converter 66. Synchronously with a second reference signal from a second reference signal source 70, the digital audio data are outputted from the sampling rate converter 66 and the outputted digital audio data are converted into analog signals by a digital/analog converter 72. The first and second reference signal sources 64 and 70 mutually independently output the first and second reference signals. COPYRIGHT: (C)2003,JPO

公开(公告)号：JP2002246991A

公开(公告)日：2002-08-30

申请号：JP2001043504

申请日：2001-02-20

Applicant: TOA CORP

Inventor： EJIMA KENICHI

IPC: G06F11/00 ,  H03K5/1532 ,  H03K5/1534 ,  H04B17/00 ,  H04L1/00

Abstract: PROBLEM TO BE SOLVED: To enable detection of errors, using a general-use circuit. SOLUTION: A master clock generator 8 generates a clock signal, having a period shorter than a H or L level interval, if reception data are received normally. An edge detection circuit 4 generates an edge detection signal, each time, it detects an edge of the receive data. A counter 6 starts counting master clock signals, each time the edge detection signal is generated. An error detection circuit 10 compares the counted value of the counter 6 with a value corresponding to a length which is allowable as the H or L level interval, each time the edge detection signal is generated.

公开(公告)号：JP2000332643A

公开(公告)日：2000-11-30

申请号：JP14092899

申请日：1999-05-21

Applicant: TOA CORP

Inventor： TANAKA TOMOHISA ,  EJIMA KENICHI

IPC: H04B1/40 ,  H04B1/62

Abstract: PROBLEM TO BE SOLVED: To provide a digital sound transmission system and its transmitter and receiver capable of realizing a high signal to noise(SN) ratio without increasing the number of resolution bits. SOLUTION: A compressor 4 compresses the signal level of an inputted analog sound signal and supplies the compressed analog sound signal to a digital sound encoding part 1. The encoding part 1 converts the compressed analog sound signal into a digital sound signal and sends the digital sound signal. The sent digital sound signal is converted into an analog sound signal by a digital decoding part 3, and the signal level of the analog sound signal is expanded by an expander 5 having characteristics reverse to that of the compressor 4.

公开(公告)号：JPH10322252A

公开(公告)日：1998-12-04

申请号：JP14332197

申请日：1997-05-16

Applicant: TOA CORP

Inventor： TANAKA TOMOHISA ,  EJIMA KENICHI

IPC: H03L7/18 ,  H03J5/02 ,  H04B1/04 ,  H04B1/10 ,  H04B7/00

Abstract: PROBLEM TO BE SOLVED: To select frequency which is not influenced by mutual modulation, etc. SOLUTION: Plural pieces of frequency data are previously stored in a state of being divided into groups by every piece of data corresponding to the frequency which is not influenced by the mutual modulation, etc., even when the pieces of data are simultaneously at the same place in a memory of the CPU 40. And frequency data corresponding to an output code of a channel selection switch 50 at a side which is selected by a changeover switch 60 is called among the pieces of the frequency data divided into the group corresponding to the output code of a group selection switch 70 from the memory and oscillation frequency (f) of a PLL synthesizer circuit 30 is controlled according to the called data by the CPU 40. Therefore, a selection range of the frequency by the channel selection switch 50 is restricted to the frequency in the group which are selected by the group selection switch 70.