Encoding and decoding method and system for information hiding

Abstract

An information hiding encoding method for processing multi-channel audio data including at least a first channel and a second channel, the encoding method includes the steps of: detecting valid audio data segments in the multi-channel, and judging Find similar audio intervals in the effective audio data segment in the first channel and the second channel; The audio interval of the audio is divided into a plurality of audio frames; the entropy values ​​of the audio frames in the first channel and the second channel are calculated; one of the first channel and the second channel is adjusted The audio data in the audio interval of the channel enables information to be hidden in the entropy difference of the audio frames in the audio interval in the first channel and the second channel. The present invention also provides a decoding method and a codec system corresponding to the encoding method. The invention can effectively resist noise interference, and the encoding and decoding can be realized conveniently and quickly.

Description

technical field [0001] The invention relates to a communication security technology, in particular to an information hiding encoding and decoding method and system. Background technique [0002] At present, the way to hide information in audio data is generally written from the time domain (Time Domain) or frequency domain (Frequency Domain), or written in plaintext or encrypted in discrete wavelet transform (DWT) or discrete cosine transform (DCT) coefficients However, it is generally easy to be disturbed by noise, and the codec method of hiding information is relatively complicated. Contents of the invention [0003] In view of the above, it is necessary to provide an information hiding encoding and decoding method and system, which can effectively resist noise interference and the decoding process is simple and convenient. [0004] The information hiding coding system is used to process multi-channel audio data including at least a first channel and a second channel, a...

AI Technical Summary

Problems solved by technology

[0002] At present, the way to hide information in audio data is generally written from the time domain (Time Domain) or frequency domain (Frequency Domain), or written in plaintext or encrypted in discrete wavelet transform (DWT) or discrete cosine transform (DCT) coefficients However, it is generally easy to be disturbed by noise, and the codec method of hiding information is more complicated

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