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

Apparatus for still picture video telephone apparatus and methods for transmitting and displaying still picture image for use therein

Patent 4962521 Issued on October 9, 1990. Estimated Expiration Date: Icon_subject December 16, 2008. 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

Video telephone
Patent #: 4258387
Issued on: 03/24/1981
Inventor: Lemelson ,   et al.

General-purpose electronic telephone station set
Patent #: 4291198
Issued on: 09/22/1981
Inventor: Anderson ,   et al.

Video telephone
Patent #: 4485400
Issued on: 11/27/1984
Inventor: Lemelson ,   et al.

Conversational video phone
Patent #: 4715059
Issued on: 12/22/1987
Inventor: Cooper-Hart ,   et al.

Video-optimized modulator-demodulator with adjacent modulating amplitudes matched to adjacent pixel gray values Patent #: 4739413
Issued on: 04/19/1988
Inventor: Meyer

Inventors

Assignee

Application

No. 285816 filed on 12/16/1988

US Classes:

348/14.14, Still frame (e.g., freeze frame)348/14.01, TWO-WAY VIDEO AND VOICE COMMUNICATION (E.G., VIDEOPHONE)358/453Image portion selection

Examiners

Primary: Ng, Jin F.
Assistant: Chan, Wing F.

Attorney, Agent or Firm

Foreign Patent References

  • 0050611 JP 04/13/1977
  • 0142986 JP. 06/13/1988
  • 0263982 JP 10/13/1988

International Classes

H04M 011/00
H04N 007/14

Foreign Application Priority Data

1987-12-17 JP

Abstract

A still picture video telephone apparatus adapted to transmit and receive, through a telephone line, still picture information from a television camera or the like, during a telephone call, includes a picture memory for storing a plurality of pages of picture information consisting of a camera-taken picture memory portion which rewrites still picture information input therein delivered from the television camera at intervals of a predetermined period, a self-prepared picture memory portion which stores desired still picture information until arrival of a rewrite instruction, and an incoming picture memory portion which sequentially rewrites still picture information therein upon receipt of still picture information when its storage regions are filled up, memory region input information for setting up regions for the self-prepared picture memory portion and the incoming picture memory portion within the picture memory, and picture memory control circuit for controlling still picture information input to and output from the picture memory based on the memory region information, wherein the picture memory is capable of storing a plurality pages of still picture information and allocating memory regions to the self-prepared picture memory portion and the incoming picture memory portion in various ways.

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