The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 06, 1997
Filed:
Dec. 21, 1994
Applicant:
Inventors:
Gerhard Eitz, Poing, DE;
Sandor Gyarmati, Villingen-Schwenningen, DE;
Assignee:
Deutsche Thomson Brandt GmbH, Villingen-Schwenningen, DE;
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348466 ; 348468 ;
Abstract
In order to achieve a greater degree of security in the decoder for the control frame of teletext pages, the control frame is initially selected and decoded from the data stream by means of a bit by bit comparison with a frame word. Thereby, the following steps are carried out in dependence on the number of coincidences occurring during the bit by bit comparison with the frame word: