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:
Nov. 12, 2019
Filed:
Sep. 19, 2016
Koninklijke Philips N.v., Eindhoven, NL;
Cornelis Pieter Janse, Eindhoven, NL;
Leonardus Cornelis Antonius Van Stuivenberg, Helmond, NL;
Koninklijke Philips N.V., Eindhoven, NL;
Abstract
An audio signal processing apparatus comprises a receiver () receiving an audio signal sampled at a first sampling frequency, the audio signal having a maximum frequency below half the first sampling frequency by a first frequency margin. A filter bank () generates subband signals for the digital audio signal using overlapping sub-filters. A first frequency shifter () applies a frequency shift to at least one subband of the set of subbands and a decimator () decimates the subband signals by a decimation factor resulting in a decimated sampling frequency being at least twice a bandwidth of each of the overlapping sub-filters. The frequency shift for a subband is arranged to shift the subband to a frequency interval being a multiple of a frequency interval from zero to half the decimated sample frequency. The subband may be individually processed and the processed subbands may subsequently be combined to generate a full band output signal.