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A spectral shaping technique is adopted to expand the operating frequency range for DWT-based blind audio watermarking. The process is performed framewisely over the 3rd level approximation subband, of which the spectrum spans from 0 to 2756 Hz. The effectiveness of the proposed scheme is demonstrated using the perceptual evaluation of audio quality and bit error rates of recovered watermarks under...
A scheme for energy compensation is proposed to remedy the deficiency of the DWT-DCT based scheme while applying the quantization index modulation (QIM) to perform blind audio watermarking. Our experimental results show that both the compensated and uncompensated DWT-DCT schemes can achieve satisfactory robustness and imperceptivity at a payload capacity as high as 516.80 bps. However, because of...
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