For the fundamental frequency F0(t) in each small segment, the constraint of harmonicity, and the constraint of common onset and offset are implemented as follows.
First, from constraint 2, the channel number
of ,
in which the harmonic components exist in the output of the -th channel, is determined by
Next, from constraint 3, let the onset and offset of the fundamental component, and , be and , respectively. Moreover, we assume that msec and msec. Here is taken from the result of a psychoacoustical experiment on the synchronism of onset [Kashino and Tanaka1994].
In this paper, onset and offset in Xk(t) are determined as follows.
Here, constraint 2 acts on the signal component of f1(t) in the log-frequency domain, and constraint 3 acts the signal component of f1(t) in the time domain.