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. 05, 2015
Filed:
Aug. 09, 2010
John Gerard Beerends, Hengstdijk, NL;
Jeroen Van Vugt, The Hague, NL;
John Gerard Beerends, Hengstdijk, NL;
Jeroen van Vugt, The Hague, NL;
Koninklijke KPN N.V., The Hague, NL;
Nederlandse Organisatie voor Toegepast-Natuurwetenschappelijk Onderzoek TNO, Delft, NL;
Abstract
The invention relates to a method for determining a quality indicator representing a perceived quality of an output signal of an audio device with respect to a reference signal. Such audio device may for example be a speech processing system. In the method the reference signal and the output signal are processed and compared. The processing includes dividing the reference signal and the output signal into mutually corresponding time frames. The processing further includes scaling the reference signal towards a fixed intensity level. Time frames of the output signal are selected based on measurements performed on the scaled reference signal. Then, a noise contrast parameter is calculated based on the selected time frames of the output signal. A noise suppression is applied on at least one of the reference signal and the output signal based on the noise contrast parameter. Finally, the reference signal and the output signal are perceptually subtracted to form a difference signal, and the quality indicator is derived from the difference signal.