L3. Frequency Domain Processing Flashcards
1
Q
Are speech and music waveforms periodic?
A
No, they are pseudoperiodic
2
Q
what are the two forms that the Fourier series of a periodic waveform x(t) can be written in?
A
- cos&sin
- Modulus/phase
3
Q
What does a line spectrum tell us about a periodic wave
A
which harmonics are present and how strong they are
4
Q
What are two uses of DFT and it’s inverse?
A
- Spectral analysis
2. Signal processing
5
Q
What is the difference betwen FFT and DCT?
A
same results but faster
6
Q
What is Luminance (Y)?
A
a photometric measure of luminous INTENSITY per unit area
7
Q
What does chrominance (I,Q) convey?
A
colour information of photo
