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:
Dec. 26, 1995
Filed:
Oct. 20, 1994
Leonardus L Vogten, Eindhoven, NL;
Chang X Ma, Eindhoven, NL;
Werner D Verhelst, Brussels, BE;
Josephus H Eggen, Eindhoven, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
Method and apparatus for manipulating an input signal (e.g. an audio (equivalent) signal) to obtain an output signal having a different pitch and/or duration. The method includes (a) positioning a chain of successive overlapping time windows with respect to the input signal; (b) deriving segments signals from the input signal and the windows; and (c) synthesizing the output signal by chained superposition of the segments signals. Each of the windows (except for the first window in the chain) is positioned by incrementing a position of the window from a corresponding position of a preceding window in the chain by a time interval. The time interval is substantially equal to a local pitch period for a portion of the input signal with respect to which the window is positioned. Accordingly, each of the windows of the chain (except for the first window) is positioned so that it begins at a predetermined time interval from a preceding window in the chain. The apparatus includes units for carrying out each of these processes.