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Information embedding and extracting method based on Unicode coding

An information embedding and extraction method technology, applied in the field of communication, can solve the problems of a certain time interval, insufficient utilization of channel resources, low efficiency, etc.

Pending Publication Date: 2019-11-19
XIAN INSTITUE OF SPACE RADIO TECH
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Problems solved by technology

[0004] However, no matter which method is mentioned above, when the communication channel is occupied, if you want to send other messages, you must wait for a certain period of time before sending them again.
This leads to inefficiency and channel resources are not fully utilized

Method used

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  • Information embedding and extracting method based on Unicode coding
  • Information embedding and extracting method based on Unicode coding

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Embodiment Construction

[0077] A detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0078] Unicode is a relatively common character encoding for computers in the world. This encoding method is extended from the ASCII character set. Its main feature is that each character uses two byte encoding. It can meet the cross-platform text processing and conversion requirements, so the present invention conducts research on a lossless information embedding method for text messages based on Unicode encoding. First of all, we study and analyze the characteristics of the encoding, through the processing of message characters (Chinese characters, alphabetic characters and other symbols), segmental encoding calculation and conversion between different regions, without any additional information, to each character Losslessly embed 1 to 7 bits of information in the medium. This method can realize the coordinated transmission of satellite messages and se...

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Abstract

The invention provides an information embedding and extracting method based on Unicode encoding, which comprises the following steps: (1.1) preprocessing high bytes and low bytes of text message characters after Unicode encoding, so that the numerical ranges of the high bytes and the low bytes of each character are centralized; (1.2) carrying out segmented encoding calculation on the preprocessedhigh bytes and low bytes to enable the encoded high bytes and low bytes to be concentrated at certain data bits; (1.3) using data bits which are not used in the encoded high bytes and low bytes for information embedding, wherein the information extraction method comprises the following steps: (2.1) extracting embedded information according to sections where high bytes and low bytes of a message containing the embedded information are located; (2.2) decoding the high byte and the low byte of the message containing the embedded information to obtain the high byte and the low byte of the messagewithout the coded information; and (2.3) performing inverse preprocessing on the high byte and the low byte of the message without the coded information, and recovering the high byte and the low byteof the original data.

Description

technical field [0001] The invention relates to a method of data communication, in particular to a method for embedding and extracting information based on Unicode encoding, and belongs to the field of communication (such as data communication technology, etc.). Background technique [0002] In the satellite communication system and navigation system, a text message in a certain format will be transmitted between the sender and the destination. The message is mainly composed of Chinese characters, various characters and various symbols. During the transmission of satellite data, sensitive information can be embedded in satellite data, and the satellite data and sensitive information can be transmitted cooperatively without increasing the transmission capacity. [0003] Common text message information embedding and hiding methods mainly focus on the text font size, color, line spacing and other formats, and hide the embedded information through different text formats. Such a...

Claims

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Application Information

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IPC IPC(8): G06F17/22
Inventor 张怡周诠黎军沈俊刘娟妮梁薇李静玲崔涛呼延烺
Owner XIAN INSTITUE OF SPACE RADIO TECH
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