U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Telecommunications interface

Patent 4748618 Issued on May 31, 1988. Estimated Expiration Date: Icon_subject May 21, 2006. 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.

Patent References

Re31182

3796835

Video conferencing system using spatial reduction and temporal resolution
Patent #: 4004084
Issued on: 01/18/1977
Inventor: Brown ,   et al.

Satellite communications system incorporating ground relay station through which messages between terminal stations are routed
Patent #: 4135156
Issued on: 01/16/1979
Inventor: Sanders, Jr. ,   et al.

Apparatus for establishing multi-address and conference call connections
Patent #: 4203001
Issued on: 05/13/1980
Inventor: Condon

Computer-communications concentrator for transmission and switching of packetized data
Patent #: 4354263
Issued on: 10/12/1982
Inventor: Bordry ,   et al.

4431992

Structure of an access point toward a data pack broadcasting network
Patent #: 4527268
Issued on: 07/02/1985
Inventor: Dublet

Digital switching system
Patent #: 4575844
Issued on: 03/11/1986
Inventor: Kosuge ,   et al.

Use of a tone bus to provide polling and data distribution apparatus for communication system terminal groups
Patent #: 4584680
Issued on: 04/22/1986
Inventor: Carter ,   et al.

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Inventors

Assignee

Application

No. 06/865871 filed on 05/21/1986

US Classes:

370/419, Input or output circuit, per se (i.e., line interface)348/14.12, Transmission control (e.g., resolution or quality)370/466, Converting between protocols379/202.01, Conferencing379/908MULTIMEDIA

Examiners

Primary: Olms, Douglas W.
Assistant: Marcelo, Melvin

Attorney, Agent or Firm

International Classes

H04N 7/15 (20060101)
H04L 12/56 (20060101)

Abstract

A telecommunications interface is disclosed. The inventive telecommunications interface is capable of collecting multiple asynchronous video, audio, graphic and data signals from a variety of different kinds of sources and retransmitting such signals in a suitable form for display or detection with one or more types of receiver equipment at one or more locations. The interface operates at rates ranging from several hundred bits per second to several gigabits per second.The telecommunications interface includes a dual port RAM whose input and output operate asynchronously. Signals from the user sources are stripped of timing and source identification information and are written into the dual port RAM, while output processors read previously stored user signals out from the dual port RAM. The output processor appropriately format the retrieved signals, which are then transmitted to the receiver equipment.

Other References

  • "The APO TV-Conferencing Facility", Telecommunications Journal of Austrailia, A. J. Seyler et al., 1973, vol. 23, No. 3, pp. 216-225
  • Videoplex Brochure, Videoplex Inc., Model MDI-4/A TV Signal Multiplexer, 9-85
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