Digital audio-frequency anti-distorting method
The method is the digital watermark technology, which is based on the wavelet transformation. For those audio frequency data to be protected, the wavelet transformation is applied to implant the watermark into the real-time audio frequency simultaneously, when recording. The implement method is to d...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | The method is the digital watermark technology, which is based on the wavelet transformation. For those audio frequency data to be protected, the wavelet transformation is applied to implant the watermark into the real-time audio frequency simultaneously, when recording. The implement method is to decompose the recorded audio frequency data in the low frequency coefficient of wavelet transformation, the watermark and the synchronization code are implanted. By the reversed transformation, the watermark and the synchronization code are obtained. By the judgement of watermark in the audio frequency, we can tell if the data is cut off. |
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