Abnormal call audio identification method for mobile phone

The invention provides an abnormal call audio identification method for a mobile phone, which belongs to the technical field of digital signal processing, and comprises the following steps: 1) obtaining the audio of an opposite party in the current call; 2) sampling, storing and reading recording fragments of recent normal calls of a user; (3) performing frequency domain transformation on the audio in the step (1) and the plurality of recording fragments in the step (2) to obtain a plurality of frequency domain matrixes; and 4) comparing the noise features of the audio with the noise features of the plurality of recording segments, if the feature difference range of the noise features of the audio and the noise features of the recording segments is too large, judging that the audio of the opposite side in the current call is abnormal audio, and performing reminding. According to the method, the characteristic that the noise feature of the synthesized sound or the recorded audio used by the abnormal incoming c