lec 6 Flashcards
1
Q
if you zoom into a waveform, you may see horizontal striations or vertical stirations. what filter is each associated with?
A
- horizontal: narrow-band filtering (only really used for infant-cry analysis
- vertical: wide-band filtering (vocal fold movements)
2
Q
what happens to time resolution if you zoom in on a waveform to display only a few seconds of speech?
A
higher time resolution
3
Q
what does this do: root (3) mean (2) square (1)
A
measures the average amplitude of a waveform signal
4
Q
how do we go from waveform to spectrum?
A
fast fourier transform
5
Q
what does a wide- vs narrow-band filter show on a spectrum?
A
- wide: shows formants (red line)
- narrow: shows harmonics
6
Q
what is LPC?
A
- linear predictive coding: predicting future samples based on past samples
- there is half as many formants as there is coefficients
- example: 8 LPC coefficients = 4 formants
7
Q
if you want to measure durations of individual segments, what type of spectrogram would you choose?
A
wide band filter
8
Q
when working with speech signals, what is under the time domain?
A
- broad segmentation
- measures
- (everything else = frequency domain)
