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Time-Frequency Reassignment
Time-Frequency Reassignment
(TFR) provides a sharpened
spectrogram
display based on locally calculated instantaneous time and frequency in the
STFT
Spectrogram energy is
reassigned
(moved) from
where
are computed locally from the spectrogram in a neighborhood about
Subsections
Time-Frequency Reassignment Formula
Spectrogram of a Chirp
Reassigned Spectrogram of a Chirp
Effect of Blanking Amplitude in Center
Spectrogram of Crossing Chirps
Reassigned Spectrogram of Crossing Chirps
Spectrogram of Crossing Chirps,
One Sample Shift
Reassigned Spectrogram of Crossing Chirps,
One Sample Shift
Spectrogram of Crossing Chirps,
Two Samples Shift
Reassigned Spectrogram of Crossing Chirps,
Two Samples Shift
Spectrogram of Crossing Chirps,
Three Samples Shift
Reassigned Spectrogram of Crossing Chirps,
Three Samples Shift
Spectrogram of Crossing Chirps,
Four Samples Shift
Reassigned Spectrogram of Crossing Chirps,
Four Samples Shift
Spectrogram of Two Beating Chirps
Reassigned Spectrogram of Two Beating Chirps
Reassigned Spectrogram of Gated Beating Chirps
Spectrogram of White Noise
Reassigned Spectrogram of White Noise
Reassigned Spectrogram of a Gated White Noise
Selected Time-Frequency Reassignment References
Spectrogram of Vowel Sequence
Reassigned Spectrogram of Vowel Sequence
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``
Lecture 6: Time-Frequency Display
'', by
Julius O. Smith III
, (From Lecture Overheads,
Music 421
).
Copyright ©
2020-06-27
by
Julius O. Smith III
Center for Computer Research in Music and Acoustics (CCRMA),
Stanford University
[Automatic-links disclaimer]