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:
Feb. 10, 2015
Filed:
May. 26, 2011
Stephane Mallat, Paris, FR;
Stephane Mallat, Paris, FR;
Ecole Polytechnique, Palaiseau, FR;
Abstract
A digital filter bank having a number J≧1 of stages is disclosed. For each integer j such that 1≦j≦J, the j-th stage includes a plurality of filtering units () each receiving an input signal of the j-th stage. These filtering units include a low-pass filtering unit () using real filtering coefficients and at least one band-pass filtering unit () using complex filtering coefficients. Following each band-pass filtering unit of the j-th stage, a respective modulus processing unit () generates a processed real signal as a function of squared moduli of complex output values of the band-pass filtering unit. The input signal of the first stage is a digital signal supplied to the digital filter bank, while for 1<j≦J, the input signal of the j-th stage includes the processed real signal generated by at least one modulus processing unit of the (j−1)-th stage.