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Fast Fourier Transform An algorithm, or digital calculation routine, that efficiently calculates the discrete Fourier transform from the sampled time waveform. In other words it converts, or "transforms" a signal from the time domain into the frequency domain. Applications - Spectral Estimation (Periodograms)
- Fast Convolutions (Fast Frequency Domain FIR Filters)
- Transform Coding (Used In STC, IRIDUM Vocoders, MPEGS, AC-3)
- Speech Recognition and Speech "Pitch" Modifications
- Speech and Image Enhancement (Spectral Noise Subtraction)
- Adaptive System Identification and Noise Cancellation
- Numerical Computation (solving systems of equations, finite elements, etc)
See also: Blackman Window, Bohman Window, Cauchy Window, Discrete Fourier Transform, Fourier Transform, Hamming Window, Hanning Window, Kaiser Bessel Window, Leakage, Rectangular Window, Signals, Windowing.
  
Subjects:- Mathematics
- Mechanical Engineering
- Noise & Vibration
- Physics
- Signal Processing
Weblinks:- Bruel & Kjaer - Technical Reviews These documents give detailed articles on measurement and signal processing theory.
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