| 摘要 |
A method of synchronizing two voice files is described. A header is added to a test sound file and the augmented file digitized, encoded and transmitted via a packet switched data network. The header comprises a tone which varies by increasing from a very low amplitude to a precisely detectable peak value, and then decreasing to a very low amplitude again. The voice data in the file follows the peak amplitude by a known delay. The header peak value is precisely located in time by searching for the peak amplitude. Adding the known delay precisely locates, temporally, the beginning of the voice data. This method allows the synchronization of the original file with its transmitted version to a very high precision.
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