| 摘要 |
The invention provides a method for analysing an input signal having an input frequency bandwidth. The method comprises providing at least one frequency-bandwidth limited portion of the input signal. For each frequency-bandwidth limited portion of the input signal the durations of half-periods and signal excursions during respective half-periods are determined. Based on the signal excursions and corresponding half-periods a quality of the input signal is determined. The determined signal quality can be a vowel in a 10 speech signal or a quality related to a condition of an industrial product. The method provides speaker independent vowel recognition, and even whispered vowels can be recognised. |
