Patent · US Expired

Television receiver with receiving devices for processing videotext and teletext signals

US4849818A · kind A · utility

5Cited by

4References

2Claims

0Family size

Assignee

Deutsche Thomson-Brandt GmbH · DE

Inventors

Uwe Hartmann · Stuttgart, DE
Udo Mai · Hauzenberg, DE
Fritz Ohnemus · Villingen-Schwenningen, DE

Key dates

Filing date	Sep 1, 1988
Grant date	Jul 18, 1989
Priority date	—
Expiry date	Sep 1, 2008

Classification

Technology area (CPC H)Electricity
CPC primaryH04N21/47
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A television set with videotext and/or teletext decoders having character generators which are synchronized by the deflection generators of the television set and in which audio will be forwarded only when an authorized television signal is being received and in that a memory in the decoder will be accessible to display a recognizable image even when the television transmitter is turned off.

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