Shear wave domain audio watermark embedding and detecting method based on robust QR decomposition
A technology of QR decomposition and audio watermarking, applied in image watermarking, image data processing, instruments, etc.
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[0056] A shear wave domain audio watermark embedding method based on robust QR decomposition, characterized in that it proceeds in accordance with the following steps:
[0057] Step 11: Watermark encoding: Binary watermark image Scramble encryption into a secure watermark matrix ,in
[0058]
[0059] In order to facilitate the embedding of the two-dimensional watermark image into the one-dimensional audio signal, and then perform dimension reduction processing on it, that is, convert the two-dimensional watermark image into a one-dimensional binary watermark sequence:
[0060]
[0061] Finally, according to the following formula, the Perform BPSK modulation mapping to get a one-dimensional {-1,1} anti-phase sequence :
[0062] ;
[0063] Step 12: Segment the original audio carrier according to the size of the digital watermark and the synchronization code, and then use the time-domain audio sample statistics to embed the synchronization code, as follows:
[0...
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