| 摘要 |
The invention relates to a method for determining a characteristic pattern for a speech message that is supplied in the form of a numerically encoded audio signal generated by means of a sampling process. Said method comprises at least the following steps for determining the characteristic pattern on the basis of the numerically encoded audio signal: in a first step, non-speech portions of the audio signal are suppressed in that irrelevant frequency ranges are filtered out by applying a suitable signal filter, particularly a bandpass filter, to the audio signal; in a second step, a copy command (SQR) is used in order to copy all elements of the numerically encoded audio signal into the positive number range; in a third step, an audio signal sampling rate characterizing the sampling process is adjusted; in a fourth step, the new value range of all elements of the numerically encoded audio signal is scaled with regard to a maximum value and a mean value, said new value range being the result of the adjustment of the sampling rate. The invention further relates to a system for carrying out the disclosed method as well as devices and a corresponding communication network. |
