Media content identification on mobile devices

A method for audio fingerprinting by using content-based audio feature extraction, the method comprising:

• analyzing input audio samples, divided into overlapping frames, to produce windowed audio frame samples for each overlapped frame;
• computing a fast Fourier transform (FFT) for the windowed audio frame samples which FFT results are filtered by a filter-bank on the spectral components to produce a set of filter bank output coefficients;
• computing a log function and a square root function of each set of filter bank output coefficients to produce log and square root output coefficients;
• applying a discrete cosine transform (DCT) separately to the log and square root output coefficients to produce two sets of DCT spectral components;
• and
• applying a temporal multi-tap finite impulse response (FIR) smoothing derivative filter to the two sets of DCT spectral components to produce two separate primary descriptors, wherein values in the two separate primary descriptors are sampled to produce two primary signatures.