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A Reversible Watermarking Method for Audio Signals

An implementation method and audio signal technology, applied in the field of information hiding, can solve problems such as large audio distortion

Active Publication Date: 2020-10-27
UNIV OF SCI & TECH OF CHINA
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

However, the audio distortion caused by the current audio reversible watermarking at the same embedding rate is relatively large, how to reduce the audio distortion at the same embedding rate has become a technical problem to be solved

Method used

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  • A Reversible Watermarking Method for Audio Signals
  • A Reversible Watermarking Method for Audio Signals
  • A Reversible Watermarking Method for Audio Signals

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Embodiment Construction

[0019] The following describes the technical solutions in the embodiments of the present invention clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0020] The embodiment of the present invention provides a method for implementing reversible watermarking of audio signals, such as figure 1 As shown, it mainly includes the following steps:

[0021] 1. Use the first prediction model to predict the value of the left channel signal point to obtain the residual.

[0022] Such as figure 2 Shown is a schematic diagram of the audio left channel signal. The value of the i-th signal point of the le...

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Abstract

The invention discloses a reversible watermark implementation method of an audio signal. The method comprises steps that a value of a left channel signal point is predicted through utilizing a first prediction model to obtain a residual error; the residual error is utilized to distinguish different smooth regions of a right channel signal, and an optimal right channel signal slip region is selected through utilizing the optimization algorithm; a value of each point in the optimal right channel signal slip region is predicted through utilizing a second prediction module, a residual error is obtained, and the spread method is utilized for embedding and extraction recovery of the watermark information. The method is advantaged in that the audio embedding capacity is improved while audio embedding distortion is greatly reduced, an original audio can be restored losslessly after watermark extraction, and the method can be applied to authenticity and nondestructive authentication of audio signals.

Description

Technical field [0001] The invention relates to information hiding technology, in particular to a method for realizing reversible watermarking of audio signals. Background technique [0002] Because the traditional encryption method protects the multimedia content and the integrity authentication scheme cannot prevent re-dissemination and misappropriation. As a supplement and extension of encryption technology, digital watermarking technology has developed rapidly in terms of copyright protection and integrity authentication. Digital watermarking technology is to embed signals (images, texts, signatures, symbols with special meanings, etc.) as marks in digital media works. Its purpose is to carry out copyright protection, ownership certification and integrity protection. It is an important information hiding technology. Research direction. [0003] Audio digital watermarking technology refers to embedding watermark information in digital audio. Compared with traditional audio pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L19/018
CPCG10L19/018
Inventor 张卫明俞能海吴媛欣姚远志
Owner UNIV OF SCI & TECH OF CHINA
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