Pre-emphasis filter for speech recognition

1. What is pre-emphasis in speech recognition?
2. Which filter is used in pre-emphasis?
3. What is a preemphasis filter?
4. What is the use of pre-emphasis?

What is pre-emphasis in speech recognition?

Typically, prior to some process, such as transmission over cable, or recording to phonograph record or tape, the input frequency range most susceptible to noise is boosted. This is referred to as "pre-emphasis" – before the process the signal will undergo.

Which filter is used in pre-emphasis?

Typically, pre-emphasis is applied as a time-domain FIR filter with one free parameter, for example, in speech coding at a sampling rate of 8kHz or 12.8kHz, we use the pre-emphasis filter .

What is a preemphasis filter?

A command to filter each selected Sound object. The resulting Sound object has a higher spectral slope. The reverse of Sound: Filter (de-emphasis)....

What is the use of pre-emphasis?

Pre-emphasis should be used when the signal loss in the transmission channel between Transmitter and Receiver is heavy and the signal observed at the end of Receiver is less than the receiving sensitivity required for Receiver.