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Multipoint digital simultaneous voice and data system
| Details |
Inventors: Hamdi, Rabah S.;
Assignee: Compaq Computer Corporation (Houston, TX)
Primary Examiner: Vu; Huy D.
Assistant Examiner: Harper; Kevin C.
Attorney, Agent or Firm: Akin, Gump, Strauss, Hauer & Feld, L.L.P.
A multipoint conferencing system communicates with a first remote digital simultaneous voice and data (DSVD) modem and a second DSVD modem. The multipoint conferencing system has a first DSVD modem adapted to communicate with the first remote DSVD modem and a second DSVD modem adapted to communicate with the second remote DSVD modem. Each DSVD modem has an analog to digital converter and a digital signal processor coupled to the analog to digital converter for receiving data from the remote DSVD modems. The system also has a bridge coupled to the first and second DSVD modems for transferring data between the first and second remote DSVD modems. The bridge contains a speech decoder adapted to receive data from the first and second remote DSVD modems, first and second summers, a speech coder which is adapted to send data to the first and second remote DSVD modems, and a digital data router for collecting digital data from the first and second remote DSVD modems and forward the digital data to first remote DSVD modems, the second remote DSVD modems, or both. To convert the digital data back into the analog domain, the system has a sound generator or speaker, a microphone adapted to receive sound, and an acoustic echo cancelling system for minimizing echo feedbacks from the speaker. In addition to the multipoint DSVD system, a full duplex speaker telephone is also provided to handle voice only conferencing. |
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DETAILED DESCRIPTION The present invention facilitates the sharing of data and the exchange of voice information over a network of DSVD modems, including a first remote digital simultaneous voice and data (DSVD) modem and a second remote DSVD modem.
The multipoint conferencing system provides a first DSVD modem adapted to communicate with the first remote DSVD modem and a second DSVD modem adapted to communicate with the second remote DSVD modem.
Each DSVD modem has an analog to digital converter and a digital signal processor coupled to the analog to digital converter for receiving data from the remote DSVD modems.
The system also provides a bridge which is connected to the first and second DSVD modems for transferring data between the first and second remote DSVD modems.
The bridge contains a speech decoder adapted to receive data from the first and second remote DSVD modems, first and second summers, a speech coder which is adapted to send data to the first and second remote DSVD modems, and a digital data router for collecting digital data from the first and second remote DSVD modems and forwarding the digital data to first remote DSVD modems, the second remote DSVD modems, or both.
To convert the digital data back into the analog domain, the system has a sound generator or speaker, a microphone adapted to receive sound, and an acoustic echo cancelling system for minimizing echo feedbacks from the speaker.
In addition to the multipoint DSVD system, a full duplex speaker telephone is also provided to handle voice only conferencing.
Thus, the multipoint conferencing system of the present invention enables the sharing of data and the exchange of voice information over a network of DSVD modems.
The multi-point communication capability of the present invention facilitates both audiovisual and data communications, overcoming current point-to-point network constraints.
The multiple DSVD connections thus supports multiple users who need to share the data and exchange voice simultaneously over the same link
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