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:
Jan. 14, 1997
Filed:
Mar. 28, 1994
Applicant:
Inventor:
Matthias Herrmann, Hildesheim, DE;
Assignee:
Blaupunkt-Werke GmbH, Hildesheim, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04H / ; H04B / ;
U.S. Cl.
CPC ...
381 13 ; 455222 ; 455223 ; 455296 ;
Abstract
In a circuit for suppressing short-lived noise phenomena in a digital audio signal, in particular during a temporary test reception of another transmitter, the audio signal is multiplied by a factor which, prior to the appearance of the noise phenomenon, is brought from a maximum value to a minimum value in accordance with a predetermined time function, and at the end of the noise phenomenon, is returned to a maximum value. The invention has special application to the Radio Data System defined by the European Broadcasting Union, and the testing of 'Alternative Frequencies' in that system.