The invention discloses an encrypted call audio traffic recognition method based on
spectral analysis, a training method of an audio traffic recognition model, a training method of a classification recognition model, devices, a storage medium, equipment and a
computer program product. Performing first division on all the
voice data packets to generate a plurality of first
voice data packet sequences; inputting the plurality of generated first
voice data packet sequences into an audio flow identification model, and generating a plurality of second voice data packet sequences by performing second division on all voice data packets through the audio flow identification model; and determining a
classification result of the encrypted voice flow data according to the extraction of the data features of each second voice data packet sequence in the
frequency domain. The universality and recognition accuracy of the model are improved, and the problem that an existing encrypted
speech recognition method is poor in universality is solved.