Howtosignalprocessing
- How do you describe quality of speech?
- What is a speech signal?
- What is a good PESQ score?
- How is PESQ calculated?
- What is speech signal frequency?
How do you describe quality of speech?
Descriptions of voice quality have traditionally consisted of qualitative terms such as warm, shrill, twangy, creaky, shrieky, breathy, yawny, gravelly, hoarse, ringing, dull, nasal, resonant, rough, and pressed.
What is a speech signal?
Speech signals are sound signals, defined as pressure variations travelling through the air. These variations in pressure can be described as waves and correspondingly they are often called sound waves. In the current context, we are primarily interested in analysis and processing of such waveforms in digital systems.
What is a good PESQ score?
PESQ returns a score from -0.5 to 4.5, with higher scores indicating better quality.
How is PESQ calculated?
The PESQ asymmetry factor is calculated from a stabilised ratio of the Bark spectral density of the degraded to the reference signals in each time-frequency cell. This is raised to the power 1.2 and is bounded with an upper limit of 12.0. Values smaller than 3.0 are set to zero.
What is speech signal frequency?
Although speech typically covers frequencies from 30 to 10,000 Hz, most of the energy is in the range from 200 to 3500 Hz.
