Digital audio-frequency water-print inlaying and detecting method based on auditory characteristic and integer lift ripple
A digital watermarking and digital audio technology, applied in image data processing, color TV components, TV system components, etc., can solve serious rounding errors, complicated calculations, and failure to fully consider the perceptual characteristics of the human auditory system, etc. question
Inactive Publication Date: 2004-09-15
王向阳
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[0013] 1. When extracting watermark information, the original audio carrier is directly or indirectly required;
[0014] 2. The embedded watermark information is generally a pseudo-random sequence (or binary symbol image), and the capacity of the digital watermark is too small;
[0015] 3. The perception characteristics of the human auditory system (HAS) cannot be fully considered, a
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[0103] The specific implementation of the digital audio watermark embedding and detection method based on auditory characteristics and integer lifting wavelet described in the present invention is as attached figure 1 , attached figure 2 As shown, the digital audio watermark embedding and detection method based on auditory characteristics and integer lifting wavelet of the present invention includes the following specific steps:
[0104] Let the original digital audio signal be A={a(i), 0≤ip -1)} is the amplitude value of the i-th audio data, and p is the number of bits used to represent each data.
[0105] Let the digital watermark be a 256-level grayscale image (or 24-bit color image) W={w(i, j), 0≤i
[0106] The embedding process of digital watermark is:
[0107] (1) Compression coding and scrambling encryption of digital w...
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The invented method is a new digital watermark method for embedding gray image (or color image) into original digital audio production, belonging to area of information safety and multimedia information processing. first, watermark image is encoded as one dimension binary sequence, and scrambling encryption is added. Next, sectionalized treating is carried out for digital audio signal. Based on features of time domain shelter of human auditory system, integer type upgraded wavelet transform is carried out for sect of audio frequency selected in selfadaptation. Then, based on features of frequency domain, wavelet coefficient is determined in selfadaptation. Watermark information is embedded into hearing important coefficients with wavelet transformed by using quantization treating procedure. Finally, digital audio production with embedded watermark information is obtained by inversed wavelet transform and recombination of audio data sects. Inversed process can test digital watermark.
Description
Technical field [0001] The digital audio watermark embedding and detection method based on auditory characteristics and integer lifting wavelet described in the present invention is a new digital watermark method for embedding grayscale images (or color images) into original digital audio works, belonging to information security, multimedia the field of information processing. Background technique [0002] As an effective means of intellectual property protection of digital audio works (such as MP3 music, MIDI music, etc.), Digital Audio Watermarking (Digital Audio Watermarking) technology has been widely concerned, and has become a research hotspot in the international academic circles. The so-called digital audio watermarking technology is to embed a special logo information (pseudo-random sequence or identifiable pattern text) into the original digital audio works to identify the copyright and legal users of the audio works, thereby authenticating or controlling the audio...
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Inventor 王向阳
Owner 王向阳
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