System and method for classification of audio or audio/video signals based on musical content

An automated processing system for classifying audio signals as music or non-music, comprising:

• a source of at least one digitized audio signal;
• a spectrum module for receiving said at least one digitized audio signal and for generating representations of spectral power distribution with respect to frequency and time of said audio signal;
• a first moment module for receiving said generated representations from said spectrum module, for calculating for each time instant first moment of said distribution representation with respect to frequency, and for generating a representation of time series of first moment values;
• a degree of variation module for receiving said representation of time series of first moment values from said first moment module, for calculating a measure of degree of variation with respect to time of said values of said time series, thereby producing a representation of first moment time series variation measuring values;
• and
• a module for receiving said representation of said first moment time series variation measuring values and for classifying said received representation by detecting patterns of low variation, which correspond to the presence of musical content in said at least one digitized audio signal, and patterns of high variation, which correspond to the absence of musical content in said at least one digitized audio signal.