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:
Sep. 17, 2002
Filed:
May. 07, 1999
Ercan F Gigi, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An audio equivalent signal is coded by determining a noise value for harmonic frequencies. The noise value is determined by the change of phase of the harmonics in successive segments of the signal. The noise value for a harmonic frequency represents a contribution of a periodic component and an aperiodic component to the segment at the harmonic frequency. To this end, the pitch development of the signal is determined, and the signal is broken into segments of, e.g., one or two pitch periods wide. For each of the analysis segments an amplitude value and a phase value is determined for the harmonic frequencies. The noise value for each of the harmonics is determined by comparing the phase value for the harmonic of the segment to a corresponding phase value for at least one preceding or following segment. Each segment is coded as the amplitude value and the noise value for each of the harmonics. The method is preferably used for speech synthesis.