Introduced in this paper is a speechcontroller based on fixed-point DSP ADSP2181, which adopts mel-scale frequency cepstrum coefficient as principal speech recogniti0n parameter.
The structure of AEC as well as its composing modules, are introduced such as the speech detector, the adaptive filter, the time delay estimator and the NLMS algorithm controller.
This controller imitates heat curve which coming from experienced cook to control the cooking process. Further more it has various rice-cooking mode and realizes the speech hint function.