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:
Dec. 21, 1999
Filed:
Aug. 11, 1997
Imre Varga, Hannover, DE;
Jurgen Schmidt, Wunstorf, DE;
Deutsche Thomson-Brandt GmbH, , DE;
Abstract
The reproduction of mono audio signals leads to an unpleasant sound impression because of the lack of any spatial character. It is therefore desirable to produce a two-channel signal electrically from the single-channel input signal. Some of the known single-band methods are very costly and provide only an inadequate impression of a spatial character. In the case of the invention, a plurality of signals of different types are first of all formed from the mono input signal by filtering, and virtual single-band stereo signals are then generated separately for each of these signals of different types. These stereo signals are subsequently combined to form two output signals.