The STFT is a mapping from a
one-dimensional function (the *domain*, which is a function of
time) to a two-dimensional
function (the *range*, which is a function of time and frequency).
Now suppose, rather than holding constant (4),
we also allow it to be a parameter.
The new mapping we so obtain is a mapping from the one-dimensional
*domain* (time) to a three-dimensional *range*
(time, frequency, and log-scale) that we previously referred to as the
TFS parameter
space (Fig. 1(a)).

Thu Jan 8 19:50:27 EST 1998