Patent ID: 7783889

Claim:
A method for generating signatures implemented using an apparatus comprising a processor, the method comprising: obtaining a first frame of media samples; identifying a first frequency component having a first spectral power and a second frequency component having a second spectral power by performing a spectral transform operation on the first frame of media samples; determining a first descriptor of the first frame of media samples based on a comparison of the first spectral power and the second spectral power; generating a first signature based on the first descriptor; identifying a second frame of media samples by extracting a common plurality of media samples from the first frame of media samples and appending another plurality of media samples to the common plurality of media samples; identifying a third spectral power associated with a third frequency component and a fourth spectral power associated with a fourth frequency component, wherein the third frequency component and the fourth frequency component are associated with performing the spectral transform operation on the second frame of media samples; determining a second descriptor based on a comparison of the third spectral power and the fourth spectral power; and generating a second signature based on the second descriptor.