Patent · US Expired

Editing arrangement for videotex system with public terminals

US4575579A · kind A · utility

75Cited by

2References

7Claims

0Family size

Assignee

International Standard Electric Corporation · US

Inventors

Gerhard Simon · Mühltal, DE
Gerhard Schneider · Kirkland, US

Key dates

Filing date	Nov 29, 1983
Grant date	Mar 11, 1986
Priority date	—
Expiry date	Nov 29, 2003

Classification

Technology area (CPC G)Physics
CPC primaryG06F3/153
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

In public videotex (Btx) terminals, different pages are displayed successively on the screen in the off-line mode (e.g., advertisements and user instructions). To be able to update such off-line pages at low cost, a page memory in the terminal is constructed as a random-access memory (46). A central operating facility contains an editing device in which the information and control characters required to display an off-line page are produced. These characters are transmitted to the terminal and written into the random-access memory (46). This may be effected automatically when the supply voltage is turned on.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.