公开(公告)号：WO99062158A1

公开(公告)日：1999-12-02

申请号：PCT/US1999/011957

申请日：1999-05-28

IPC: H02H9/06 ,  H04M3/18 ,  H02H3/22

CPC classification number: H02H9/06 ,  H04M3/18

Abstract: A surge protector circuit and method of protecting electronic equipment which do not load down a circuit at high frequencies and do not degrade a signal in high speed data transmission. A gas tube (2) is connected in parallel with low capacitance diodes (52, 54, 58, 60, 62, 66) and an avalanche semiconductor device (56, 64), such as a TVS. The diodes and the avalanche semiconductor clamp the voltage transient and allow the slower gas tube more time to fire, discharging the surge. The addition of the low capacitance diodes in series with the avalanche semiconductor, reduces the line-to-line and line-to-ground capacitances of the surge protector and keeps the surge protector circuit from loading down the rest of the circuit and degrading the signal.

Abstract translation: 一种浪涌保护器电路和保护电子设备的方法，该电子设备不会在高频率下降低电路并且不会降低高速数据传输中的信号。 气体管（2）与低电容二极管（52,54,68,60,62,66）和雪崩半导体器件（56,64）（诸如TVS）并联连接。 二极管和雪崩半导体钳位电压瞬变，并允许较慢的气体管更多时间点火，释放浪涌。 与雪崩半导体串联的低电容二极管的添加减少了浪涌保护器的线对线电容和线对地电容，并保持浪涌保护器电路不会向下载入电路的其余部分并降低信号 。

公开(公告)号：WO99056415A1

公开(公告)日：1999-11-04

申请号：PCT/US1999/008988

申请日：1999-04-26

IPC: H04L12/28 ,  H04L12/56 ,  H04M1/253 ,  H04M3/18 ,  H04M7/00 ,  H04W28/04 ,  H04W40/02 ,  H04W40/24 ,  H04W72/04 ,  H04W74/02 ,  H04W88/14 ,  H04B7/26 ,  H04Q7/20 ,  H04Q7/24 ,  H04Q7/38

CPC classification number: H04M1/026 ,  H04L65/80 ,  H04M1/2535 ,  H04M3/18 ,  H04M7/006 ,  H04M2201/40 ,  H04M2203/2061 ,  H04M2207/18 ,  H04W8/26 ,  H04W40/02 ,  H04W40/24 ,  H04W74/0825 ,  H04W84/12 ,  H04W88/02 ,  H04W88/08 ,  H04W88/14

Abstract: A data network telephony system (99) includes a router (410) connected to a DNT-capable data network (500) and a wireless transceiver (400) and adapted to operate the transceiver (400) by a two-way narrow-band, multiple-channel, real-time duplex radio protocol, and a plurality of portable computer-enhanced communicator units (100, 200, 300 and 600), including microphone and speaker apparatus (105 and 106), each adapted to communicate with the router (410) by the two-way real-time duplex radio protocol and to process DNT calls.

Abstract translation: 数据网络电话系统（99）包括连接到具有DNT能力的数据网络（500）的路由器（410）和无线收发器（400），并且适于通过双向窄带来操作收发器（400） 多通道实时双工无线电协议以及包括麦克风和扬声器设备（105和106）的多个便携式计算机增强型通信器单元（100,200,300和600），每个便携式计算机增强型通信器单元适于与路由器 410）通过双向实时双工无线电协议，并处理DNT呼叫。

公开(公告)号：WO9749196A2

公开(公告)日：1997-12-24

申请号：PCT/FI9700390

申请日：1997-06-18

Applicant: NOKIA TELECOMMUNICATIONS OY ,  KIRLA OLLI

Inventor： KIRLA OLLI

IPC: H04R3/02 ,  H04B3/23 ,  H04M1/60 ,  H04M9/08 ,  H04M3/18

CPC classification number: H04M9/082

Abstract: The invention relates to an acoustic echo suppressor and a non-linear processor for an echo canceller in a 4-wire data transmission network. An echo canceller is typically controlled by comparing the power levels (PWRIN, PSIN) of the near-end and far-end signals (RIN, SIN). The transfer function of an acoustic echo path is usually very non-uniform. According to the invention, the spectrum of the far-end signal (RIN) is treated, before the signal power level is calculated, with a weighted filter (21), which models the effect of the transfer function of acoustic echo. As a result, the double talk dynamics is improved, since high-energy vowels of far-end speech, which normally cause low-energy vowels of near-end speech to be clipped in an echo suppressor, will be attenuated.

Abstract translation: 本发明涉及一种用于4线数据传输网络中的回声消除器的声学回声抑制器和非线性处理器。 回波消除器通常通过比较近端和远端信号（RIN，SIN）的功率电平（PWRIN，PSIN）来控制。 声回波路径的传递函数通常非常不均匀。 根据本发明，在计算信号功率电平之前，用加权滤波器（21）处理远端信号（RIN）的频谱，其对声学回声的传递函数的影响进行建模。 结果，双语动态被改善，因为通常导致近端语音的低能量元音被限制在回波抑制器中的远端语音的高能元音将被衰减。