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. 23, 2021
Filed:
Jan. 15, 2020
Harman Becker Automotive Systems Gmbh, Karlsbad, DE;
Vasudev Kandade Rajan, Straubing, DE;
Abstract
Detecting fricatives in a noisy speech signal having a clean speech signal and a noise signal, includes bandpass filtering of the noisy speech signal with a first transfer function having a first passband range to provide a first filtered noisy speech signal, and bandpass filtering of the noisy speech signal with a second transfer function having a second passband range, the second passband being different from the first passband to provide a second filtered noisy speech signal. Detecting fricatives further includes applying a maximum operation to the first filtered noisy speech signal and the second filtered noisy speech signal to provide a maximum spectrum that is representative of a frequency range of maximum fricative energy, and deciding, based on the maximum spectrum, whether a fricative is contained in the noisy speech signal. A decision signal is output that is representative of the decision.