Coding and decoding method and system for information concealment

Abstract

A coding method for information concealment is used for processing audio data of multiple channels at least including a first channel and a second channel. The coding method includes steps of detecting valid audio data segments in the multiple channels and judging audio sections having similarity among the valid audio data segments in the first channel and the second channel; segmenting the audiosections in the first channel and the second channel into multiple audio frames according to a preset number of sampling points; calculating the entropy values of the audio frames in the first channeland the second channel; adjusting the audio data in the audio sections of one channel of the first channel and the second channel so as to enable information to be concealed in a entropy value difference of the audio frames in the audio sections in the first channel and the second channel. The invention also provides a decoding method corresponding to the coding method and a coding and decoding system. The invention can prevent noise interference effectively and coding and decoding can be implemented 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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