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:
Jun. 28, 1994
Filed:
Jul. 17, 1992
Applicant:
Inventor:
Siegfried Dinsel, Munchen, DE;
Assignee:
Telefunken, , DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ;
U.S. Cl.
CPC ...
348473 ; 348484 ; 348487 ;
Abstract
In a method of transmitting digitally coded information in a television sound channel, the digitally coded information is inserted on an existing frequency-modulated RF sound carrier as a channel-coded signal above the television audio-frequency base spectrum in the base band. The modulation amplitude is selected so that disturbances during reproduction of the television sound are excluded in the receiver. The spectrum of the channel-coded signal is evenly distributed over the available frequency range using a pseudo-signal during modulation intervals. The clock frequency of the channel-coded signal is coupled with the line frequency.