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Self-adapting audio frequency spatial domain steganography method

An adaptive and audio technology, applied in speech analysis, instruments, etc., can solve the problems of audio quality and safety reduction, and achieve the effect of protecting auditory sensitive positions, avoiding randomness, and improving safety

Active Publication Date: 2017-02-22
SUN YAT SEN UNIV
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AI Technical Summary

Problems solved by technology

Due to the uncertainty of the random sequence, samples in the audio signal that are sensitive to the human ear may also be altered, resulting in a reduction in audio quality and safety

Method used

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  • Self-adapting audio frequency spatial domain steganography method
  • Self-adapting audio frequency spatial domain steganography method
  • Self-adapting audio frequency spatial domain steganography method

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0031] figure 1 Shown is a schematic flow chart of the algorithm for embedding and extracting secret information using the present invention.

[0032] An adaptive audio spatial domain steganographic method, comprising two steps of embedding and extracting secret information, wherein the embedding of secret information includes the following sub-steps: (11) high bit rate AAC compression of original WAV audio; (12) original WAV audio and After a high bit rate AAC compressed WAV audio sample value is subtracted to obtain the residual; (13) the embedded carrier of the selected information coding tool STC; (14) the cost of modifying the embedded carrier sample value by STC according to the residual design; (15) Set the embedding rate and calculate the length of the secret information to be embedded; (16)...

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PUM

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Abstract

The invention relates to the multimedia information safety field, to be specific, relates to a self-adapting audio frequency spatial domain steganography method comprising embedding of secret information and extracting of secret information. A WAV audio signal single sample is used as an embedded unit, and a modification cost of every embedded unit is designed according to a signal difference between an original WAV audio signal and the WAV audio signal after once Advanced Audio Coding (AAC) high bit rate compression decompression, and an information coding tool Syndrome Trellis Codes (STC) is used to be adapted to the embedded information automatically to realize correct extracting. According to a lot of experiments, by comparing with a spatial domain steganography method based on LSB matching, the steganography method provided by the invention is advantageous in that higher audio frequency quality and safety of audio frequency after the steganography processing are provided, and therefore an important meaning is provided for covert communication and other application fields.

Description

technical field [0001] The invention relates to the field of multimedia information security, in particular to an adaptive audio space space steganography method. Background technique [0002] Audio steganography is an important branch of information hiding technology. Audio signal is an indispensable communication medium in daily life, and the information redundancy contained in the signal makes audio a good carrier for information hiding. The current audio steganography methods can be divided into domains used when embedding information, and can be divided into: spatial domain audio hiding, compressed domain audio hiding and so on. Most of the existing spatial information hiding methods use the least significant bit modification method (LSB), and the selection of the embedding position is determined by a random sequence. Due to the uncertainty of the random sequence, samples in the audio signal that are sensitive to human hearing may also be modified, resulting in a redu...

Claims

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Application Information

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IPC IPC(8): G10L19/00
CPCG10L19/0018
Inventor 张悦骆伟祺
Owner SUN YAT SEN UNIV
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