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. 11, 2010
Filed:
Aug. 18, 2006
Jens Wildhagen, Weinstadt, DE;
Jens Wildhagen, Weinstadt, DE;
Sony Deutschland GmbH, Cologne, DE;
Abstract
A method of denoise a stereo signal comprising a stereo sum signal and a stereo difference signal, performs a frequency selective stereo to mono blending based on the masking effect of the human auditory system. Therefore, a stereo signal noise reducer, comprising a first filter bank () to split the stereo difference signal (l−r) into a plurality of subbands, respective first multipliers (C, . . . , C) to weight each of the subbands of the stereo difference signal with a respective corresponding control signal (C, . . . , C), and a first adder () to sum all weighted subbands of the stereo difference signal (l−r) to build a frequency selective weighted stereo difference signal (diff), within which a number and width of the subbands obtained via the first filter bank () are choosen according to the properties of the human auditory system, further comprises a weighting factor determination unit which determines a respective control signal (C, . . . , C) frequency selective based on the masking effect of the human auditory system.