Stationary Signals

Tags

speech-processing

Does the signals properties [see page 22, change] over time. Properties under consideration include:

• Amplitude
• Frequency
• Noise of constant mean and variance

Speech

Speech is a mixture of periodic, aperiodic and stochastic signals, making it non-stationary. However we [see page 24, generally] treat speech as quasi-stationary (AKA white-space stationary). Meaning it's stationary over a short time interval. This interval is generally clamped to between 10-30 msec.

I.E. Over a short period, the structure of a speech signal can be analysed.

Sounds

non-stationary sounds [see page 12, include]:

• diphthongs
• plosives
• affricates
• glides