On Monday, August 3, 2015 at 6:43:09 AM UTC-4, proffy wrote:
> I want to know the physical significance of liftering process.
>
> with Ci as ith feature element in the feature vector, the liftering
> changes Ci as
>
> Ci = (1 + (N/2)sin((pi*n)/N))*Ci
>
> What is it actually doing to a signal?
>
> Mathematically it is amplifying the signal.
>
> But then, why do we need such an amplification in terms of number of
> frames?
>
>
> ---------------------------------------
> Posted through http://www.DSPRelated.com
Liftering is filtering in the cepstral domain.
Dirk
Reply by proffy●August 3, 20152015-08-03
I want to know the physical significance of liftering process.
with Ci as ith feature element in the feature vector, the liftering
changes Ci as
Ci = (1 + (N/2)sin((pi*n)/N))*Ci
What is it actually doing to a signal?
Mathematically it is amplifying the signal.
But then, why do we need such an amplification in terms of number of
frames?
---------------------------------------
Posted through http://www.DSPRelated.com