Computer-implemented method and apparatus for audio data hiding
First Claim
1. A computer-implemented method for embedding hidden data in an audio signal, comprising the steps of:
- receiving the audio signal in a base domain;
transforming the received audio signal to one of a linear prediction residue domain and a cepstrum domain, wherein transformation of the received audio signal to the cepstrum domain includes a fast Fourier transform, followed by a logarithmic operation, and then an inverse fast Fourier transform; and
embedding the hidden data in one of the linear prediction residue domain and the cepstrum domain via parametric representation of the audio signal by manipulating statistical mean of selected transform coefficients, and applying a scrambling technique to the transform coefficients with a scrambling filter kept as a secret key by a content owner.
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Abstract
A computer-implemented method and apparatus for embedding hidden data in an audio signal. An audio signal is received in a base domain and then transformed into a non-base domain, such as cepstrum domain or LP residue domain. The statistical mean manipulation is employed on selected transform coefficients to embed hidden data. The introduced distortion is controlled by psychoacoustic model to ensure the imperceptibility of the embedded hidden data. Scrambling techniques can be plugged in to further increase the security of the data hiding system. The present new audio data hiding scheme provides transparent audio quality, sufficient embedding capacity, and high survivability over a wide range of common signal processing attacks.
106 Citations
23 Claims
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1. A computer-implemented method for embedding hidden data in an audio signal, comprising the steps of:
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receiving the audio signal in a base domain; transforming the received audio signal to one of a linear prediction residue domain and a cepstrum domain, wherein transformation of the received audio signal to the cepstrum domain includes a fast Fourier transform, followed by a logarithmic operation, and then an inverse fast Fourier transform; and embedding the hidden data in one of the linear prediction residue domain and the cepstrum domain via parametric representation of the audio signal by manipulating statistical mean of selected transform coefficients, and applying a scrambling technique to the transform coefficients with a scrambling filter kept as a secret key by a content owner. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A computer-implemented apparatus for embedding hidden data in an audio signal, comprising the steps of:
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a data input device for receiving the audio signal in a base domain; a signal transformer connected to the data input device for transforming the received audio signal to one of a linear prediction domain and a cepstrum domain, wherein transformation of the received audio signal to the cepstrum domain includes a fast Fourier transform, followed by a logarithmic operation, and then an inverse fast Fourier transform; and an embedder connected to the signal transformer for embedding the hidden data in one of the linear prediction domain and the cepstrum domain of the audio signal by manipulating statistical mean of selected transform coefficients, and applying a scrambling technique to the transform coefficients with a scrambling filter kept as a secret key by a content owner. - View Dependent Claims (14, 15, 16)
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17. A computer-implemented method for embedding hidden data in an audio signal, comprising the steps of:
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receiving the audio signal in a base domain; transforming the received audio signal to a linear prediction residue domain; and embedding the hidden data in the linear prediction residue domain via parametric representation of the audio signal by manipulating statistical mean of selected transform coefficients, and applying a scrambling technique to the transform coefficients with a scrambling filter kept as a secret key by a content owner. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification