Resources Contact Us Home
Method and apparatus for manipulating pitch and/or duration of a signal

Image Number 10 for United States Patent #5479564.

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.

  Recently Added Patents
Low drop-out regulator providing constant current and maximum voltage limit
Configurations and methods for effluent gas treatment
Integrated circuit testing with power collapsed
Light modulators and optical apparatuses including the same
Spin transition material
Oral care implement accessory
Fluid pressure responsive electric switch
  Randomly Featured Patents
Means for controlling lateral movement of a helicopter
Low profile jack construction
System for automatically adjusting parameters of a digital signal reproducing apparatus
Child-resistant dispensing closure
Method and apparatus for randomizing memory site usage
Pneumatic tool
Side element of a shoe upper
Method for driving a gas electric discharge device
Heated glove set
Simplified hybrid seed production by latent diploid parthenogenesis and parthenote cleavage