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Lossless information embedding and recovering method in format data stream

A technology of information embedding and recovery methods, applied in data exchange networks, digital transmission systems, electrical components, etc.

Active Publication Date: 2014-12-10
XIAN INSTITUE OF SPACE RADIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no information hiding method that can losslessly embed information in ordinary data streams without special characteristics

Method used

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  • Lossless information embedding and recovering method in format data stream
  • Lossless information embedding and recovering method in format data stream

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Experimental program
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Embodiment

[0171] Here, taking the ATM cell on the star as an example, the specific implementation manner of lossless information embedding in the formatted data stream is described in detail. The following table shows the ATM cell format on the star. The cell has a total of 53 bytes, including a 5-byte header and a 48-byte payload. The header includes 13 bits of additional information embedded in the information. Except for the 13-bit information embedding additional information, everything else in the ATM cell header is in the format of the communication protocol standard.

[0172]

[0173] Suppose the payload of the first ATM cell received is (decimal):

[0174] 0, 0, 16, 16, 55, 55, 68, 68, 16, 16, 85, 85, 102, 102, 16, 16, 119, 119, 16, 16, 0, 0, 16, 16, 55, 55, 68, 68, 16, 16, 85, 85, 102, 102, 16, 16, 119, 119, 16, 16, 0, 0, 16, 16, 55, 55, 68, 68

[0175] 1. Analyze the load of ATM cell by byte.

[0176] The maximum value in this data stream is K max =119, the minimum valu...

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Abstract

The invention discloses a lossless information embedding and recovering method in a format data stream. The method comprises the steps of storing addition information about information embedding in a head part of the data stream, operating the load of the data stream to produce a redundant bit used for embedding the information, thereby realizing the aim of embedding information in the data stream with a common format and recovering the data stream and embedded information without distortion. The method specifically comprises the following steps: firstly computing a difference value between a maximum value and a minimum value in the data stream, comparing the difference value with nth power of 2 (n is greater than 0 and less than 8), and then computing embeddable information amount under various conditions, and performing the information embedding by selecting a condition that the embeddable information amount is maximal; after receiving data, a receiving end extracting the embedded information in the format data stream and recovering original data. The method disclosed by the invention can be used for losslessly embedding information in the format data stream without special feature; and the transmission capacity of a system is improved without increasing channel resource.

Description

technical field [0001] The invention relates to a lossless information embedding method in a formatted data stream, which belongs to the technical field of data communication transmission. Background technique [0002] Common lossless information embedding methods are all for data streams with certain characteristics, such as images, audio and text, etc. When hiding such data streams, it is necessary to use the correlation between data streams to embed information. At present, there is no information hiding method that can losslessly embed information in ordinary data streams without special characteristics. The present invention proposes a lossless information embedding method in formatted data streams, which can embed information in various data streams, restore data streams and embedded information without distortion, and improve channel resources without increasing channel resources. The transmission capacity of the system. Contents of the invention [0003] The prob...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L12/951H04L47/43
Inventor 张怡周诠黎军呼延烺李静玲崔涛梁薇魏佳圆
Owner XIAN INSTITUE OF SPACE RADIO TECH
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