Conference calling system and method for a wireless communications channel

    公开(公告)号:AU4606497A

    公开(公告)日:1998-04-02

    申请号:AU4606497

    申请日:1997-09-11

    Applicant: QUALCOMM INC

    Inventor: KIMBALL ROBERT H

    Abstract: A conference calling system for a wireless communications channel. The system is adapted for use with a channel having first, second and third participants communicating via first, second and third transmitters and receivers respectively. The system includes a circuit for receiving an encoded signal from at least one of the transmitters. A second circuit determines which of the participants is speaking from the received encoded signal. A third circuit is provided for re-transmitting an encoded signal received from the speaking participant to the other participants. In the illustrative implementation, the encoded signals are variable rate speech vocoded signals in which speech is vocoded at full rate, silence is vocoded at +E,fra 1/8+EE th rate and the +E,fra 1/2 +EE and +E,fra 1/4+EE rates are used as transitional rates. In the illustrative implementation, the speaker's signal is identified by examining the rate of the received vocoded signals. When the speaker's vocoded signal is identified, it is re-transmitted without de-vocoding to the non-speaking participants in the conference call. By re-transmitting the speaker's signal without de-vocoding, the quality of the received signal is preserved.

    METODO Y APARATO PARA PROVEER RETROALIMENTACION DE AUDIO A TRAVES DE UN CANAL DIGITAL.

    公开(公告)号:MX9504448A

    公开(公告)日:1997-05-31

    申请号:MX9504448

    申请日:1995-02-17

    Applicant: QUALCOMM INC

    Abstract: El presente invento tiene por objetivo proporcionar un mecanismo de realimentacion audible que otorga al usuario la capacidad de monitorear el curso de una conexion de datos por un canal inalámbrico digital. Los tonos audibles generados al interior de la estacion base y recibidos desde una red telefonica son codificados dentro de la estacion base y transmitidos por el enlace inalámbrico digital a una unidad movil. La unidad movil decodifica la señal recibida desde la estacion base y entrega tonos audibles a un usuario. Por lo tanto el usuario puede monitorear el éxito o falla de la conexion de datos.

    DISTRIBUTED INFRASTRUCTURE FOR WIRELESS DATA COMMUNICATIONS
    84.
    发明申请
    DISTRIBUTED INFRASTRUCTURE FOR WIRELESS DATA COMMUNICATIONS 审中-公开
    分布式基础设施用于无线数据通信

    公开(公告)号:WO0018067A3

    公开(公告)日:2000-07-20

    申请号:PCT/US9921801

    申请日:1999-09-17

    Applicant: QUALCOMM INC

    CPC classification number: H04W88/12 H04W36/08 H04W80/04 H04W88/08

    Abstract: A mobile user terminal (402) accesses a packet data network (450) through one or more of several network access points (404-412). One or more control points (432-440) determines which network access point or points the user terminal is to access. Control may be retained in the current control point, or transferred to another control point, whenever it is convenient. There are preferably several routers, each having an associated home agent (418-420) which determines which foreign agents need to be accessed on behalf of each user terminal. There are several foreign agents (422-430), which forward packets received from a user terminal's home agent to the control point currently controlling communications with the user terminal.

    Abstract translation: 移动用户终端(402)通过几个网络接入点(404-412)中的一个或多个接入分组数据网络(450)。 一个或多个控制点(432-440)确定用户终端将访问哪个或哪些网络接入点。 只要方便,控制可以保留在当前的控制点,或转移到另一个控制点。 最好有几个路由器,每个路由器有一个关联的归属代理(418-420),它确定代表每个用户终端需要访问哪些外部代理。 有几个外部代理(422-430),其将从用户终端的归属代理接收到的分组转发到当前控制与用户终端的通信的控制点。

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