Voice over video communication system

Patent 5790532 Issued on August 4, 1998. Estimated Expiration Date:

September 14, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Re34034

3304372

3789165

3904830

Feedback residue compression for digital speech systems
Patent #: 3973081
Issued on: 08/03/1976
Inventor: Hutchins

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Digital memory providing fixed and variable delays in a TASI system
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Inventors

Application

No. 527952 filed on 09/14/1995

US Classes:

370/286, Echo suppression or cancellation370/435, TASI (Time Assignment Speech Interpolation)370/468Assignment of variable bandwidth or time period for transmission or reception

Examiners

Primary: Nguyen, Chau

Attorney, Agent or Firm

Schwegman, Lundberg, Woessner & Kluth, P.A.

Foreign Patent References

0 429 054 A3 EP. 05/22/1991
0 443 548 A3 EP. 08/22/1991
488685A2 EP. 06/22/1992
0 510 411 A2 EP 10/22/1992
0 526 104 A2 EP 02/22/1993
0 581 528 A1 EP 02/22/1994
0 582 537 A3 EP 02/22/1994
0 650 286 A2 EP 04/22/1994
0 614 305 A3 EP 09/22/1994
3504064 DE. 08/22/1986
3630469 DE. 03/22/1988
3409532 DE. 04/22/1989
63-054052 JP. 08/22/1988
193489 JP. 07/22/1990
257748 JP. 10/22/1990
3162052 JP 07/22/1991
2210237 GB. 01/22/1989
2 260 670 GB 04/22/1993
2 268 663 GB 01/22/1994
WO 91/07044 WO. 05/22/1991
WO 92/06550 WO. 04/22/1992
WO 92/20028 WO. 11/22/1992
WO 93/11643 WO 06/22/1993
WO 93/22869 WO. 11/22/1993
WO 94/26056 WO. 11/22/1994

International Class

H04J 003/16

Abstract

A personal communications system is described which includes components of software and hardware operating in conjunction with a personal computer. The user interface control software operates on a personal computer, preferably within the Microsoft Windows.RTM. environment. The software control system communicates with hardware components linked to the software through the personal computer serial communications port. The hardware components include telephone communication equipment, digital signal processors, and hardware to enable voice, fax and data communication with a remote site connected through a standard telephone line. The functions of the hardware components are controlled by control software operating within the hardware component and from the software components operating within the personal computer. The major functions of the system are a telephone function, a voice mail function, a fax manager function, a multi-media mail function, a show and tell function, a terminal function and an address book function. The telephone function allows the present system to operate, from the users perspective, as a conventional telephone using either hands-free, headset or handset operation. The telephone function is more sophisticated than a standard telephone in that the present system converts the voice into a digital signal which can be processed with echo cancellation, compressed, stored as digital data for later retrieval and transmitted as digital voice data concurrent with the transfer of digital information data.

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