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A phase-oriented audio watermarking method under dct transform

An audio watermarking and phase technology, applied in speech analysis, transmission systems, instruments, etc., can solve the problems of high security and complex implementation process, and achieve the effect of good attack resistance and stability

Active Publication Date: 2020-12-01
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The implementation process of this type of algorithm is relatively complicated, but the watermarking algorithm is more robust and more secure

Method used

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  • A phase-oriented audio watermarking method under dct transform
  • A phase-oriented audio watermarking method under dct transform
  • A phase-oriented audio watermarking method under dct transform

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Embodiment Construction

[0040] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0041] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein...

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Abstract

The invention discloses an audio watermarking method for the DCT transform downward phase. Audio and video media are taken as original carriers, Patchwork and DCT transform are combined, binarity of the DCT phase is utilized, the watermarking information is embedded in the phase of a low frequency coefficient of an audio signal DCT through the Patchwork method, and a set of keys that represent thelocation is formed. The method is advantaged in that while audio watermarking robustness is improved, good imperceptibility is kept, and the method can be widely applied to the audio protection scene.

Description

technical field [0001] The invention relates to a phase-oriented audio watermarking method under DCT transformation, in particular to an audio watermarking algorithm based on phase and Patchwork, belonging to the technical field of digital watermarking. Background technique [0002] At present, the main methods of copyright protection are encryption technology and digital watermarking technology. Encryption technology refers to the use of encryption algorithms to convert the original carrier data into a string of garbled characters that ordinary people cannot understand. After receiving the signal, the receiver uses the decryption algorithm to restore the signal. Although encryption technology can protect data security, it is only applicable to a part of the data. After the encrypted data is successfully decrypted, it is the same as the original carrier data and no longer has the copyright protection function. Therefore, encryption technology cannot deeply solve the problem ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/018
CPCG10L19/018H04L2209/608
Inventor 严勤汪新园肖丽莎
Owner HOHAI UNIV
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