| 摘要 |
<p>Method and apparatus for generating a digital signature are provided. The method comprises:- polarizing a sampled data segment, for example a sampled audio segment, to produce a two-state signal having a bit sequence providing a binary representation of the sampled data segment, detecting an event in the signal, the event corresponding to occurrence of a predetermined pattern in the bit sequence of the signal, selecting, on the basis of a predetermined signature collection pattern specifying a plurality of offsets from the detected event, the values of the respective bits of the bit sequence at the bit positions specified by the offsets, and on the basis of those values providing a digital signature characteristic of the sampled data segment. Related systems are also provided.</p> |
