| 摘要 |
In a device for and a method of encoding a first signal (f0), for example a speech parameter such as the pitch, as a function of time, to form a second signal, a third signal (k) is derived from the first signal, which third signal is a measure of the curvature of the first signal as a function of time. The extrema (such as k(t1) in Fig. 1b) in this third signal are determined and the second signal is generated in the form of a sequence of information blocks, of which one information block contains time information corresponding to the instant at which an extremum occurs in the third signal. A special encoding method is described, which is substantially immune to noise in the first signal. |
