Results 151 to 160 of about 3,059,110 (191)
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2021
The idea of dynamic spectral processing, introduced at the end of the previous chapter is fully developed here. The principle of sub-band analysis and synthesis is shown as the basis for a time-varying frequency-domain approach. The short-time Fourier transform (STFT) is introduced as a sequence of time-ordered DFT frames from which amplitude and phase
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The idea of dynamic spectral processing, introduced at the end of the previous chapter is fully developed here. The principle of sub-band analysis and synthesis is shown as the basis for a time-varying frequency-domain approach. The short-time Fourier transform (STFT) is introduced as a sequence of time-ordered DFT frames from which amplitude and phase
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1989
In this chapter, we continue the discussion of joint time-frequency energy representations for speech signals. Here we shall make stronger assumptions about the form of the signals. We will introduce a particular model of the time-varying vocal tract, and define its ‘transfer function’, H(t,ω).
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In this chapter, we continue the discussion of joint time-frequency energy representations for speech signals. Here we shall make stronger assumptions about the form of the signals. We will introduce a particular model of the time-varying vocal tract, and define its ‘transfer function’, H(t,ω).
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Time-frequency signal representations
1998This invited paper - of a tutorial and review character - presents an overview of two classes of time-frequency signal representations. The first class, in which the signal arises linearly, deals with the windowed Fourier transform and its sampled version (also known as the Gabor transform) and the inverse of the latter: Gabor's signal expansion.
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Free-space dissemination of time and frequency with 10−19 instability over 113 km
Nature, 2022Qi Shen, Ji-Gang Ren, Yuan Cao
exaly
2001
Nomenclature A(f) Fourier transform of a(t) B(f) Fourier transform of b(t) f frequency variable h(t) arbitrary function P(t,f) time-frequency distribution r(?) instantaneous correlation function S(t,f) spectrogram x(t) signal X(f) Fourier transform of x(t) midX(f)mid2 signal spectrum ?(t) Dirac delta function ?(t,f) kernel ...
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Nomenclature A(f) Fourier transform of a(t) B(f) Fourier transform of b(t) f frequency variable h(t) arbitrary function P(t,f) time-frequency distribution r(?) instantaneous correlation function S(t,f) spectrogram x(t) signal X(f) Fourier transform of x(t) midX(f)mid2 signal spectrum ?(t) Dirac delta function ?(t,f) kernel ...
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Low-Frequency Gravitational Wave Searches Using Spacecraft Doppler Tracking
Living Reviews in Relativity, 2006J W Armstrong
exaly