Finding start and end points of a speech signal?
Posted on 1998-12-06
I need to Find start and end points of a
below is faq from the comp.speech
but the code example is only for unix,
where can I find the doc/delphi example for this?
and where can i find some article about the end-point
End-point detection algorithms identify sections in an incoming audio signal that contain
speech. Accurate end-pointing is a non-trivial task, however, reasonable behaviour can be
obtained for inputs which contain only speech surrounded by silence (no other noises). Typical
algorithms look at the energy or amplitude of the incoming signal and at the rate of
"zero-crossings". A zero-crossing is where the audio signal changes from positive to negative
or visa versa. When the energy and zero-crossings are at certain levels, it is reasonable to
guess that there is speech. More detailed descriptions are provided in the papers cited below
and in the documentation for the following software.