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Multimedia data safety transmission method

A technology for secure transmission of multimedia data, applied in transmission systems, electrical components, voice analysis, etc., can solve problems such as inability to guarantee information security, and achieve the effect of noise reduction processing

Inactive Publication Date: 2018-07-31
成都动视时代科技有限公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the main purpose of the present invention is to provide a method for secure transmission of multimedia data, while also providing its decryption algorithm, and in the process of encryption and decryption, it also realizes the noise reduction process to the voice signal noise, to a certain extent It overcomes the shortcomings of the above-mentioned traditional encryption algorithm that cannot guarantee information security and the shortcomings of encryption in chaotic systems

Method used

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Examples

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Embodiment Construction

[0031] like figure 1 As shown, a method for safe transmission of multimedia data includes the following steps:

[0032] First, the input voice signal is collected by the sound sensor, and then the following encryption method is used to encrypt the voice signal. Let N initial signals s 1 (t),…,s n (t) and M key signals k 1 (t),…,k M (t), the encryption formula is:

[0033] X(t)=[x 1 (t),…,x N (t)] T =As k (t)

[0034] Among them, X(t) represents N encrypted signals, s k (t)=[s 1 (t),…,s n (t),k M (t)] T , A is an N×(M+N) encryption matrix, and each value is between [-1, 1]. Let A = [A S ,A k ], where A S is an N×N matrix, A k is an N×M matrix, and the encryption formula is represented by the following formula:

[0035] X(t)=A s s(t)+A k k(t),

[0036] Among them, s(t)=[s 1 (t),…,s n (t)] T , k(t)=[k 1 (t),…,k M (t)] T

[0037] Let, N=M, establish the following encryption matrix:

[0038]

[0039] Among them, A is an N×2N matrix, B is a 1×N matri...

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Abstract

The invention provides a multimedia data safety transmission method, and provides a decryption algorithm thereof at the same time; the noise reduction processing on the voice signal noise is realizedin the encryption / decryption process, and the defect that the traditional encryption algorithm cannot guarantee the information security and the defect existent in the encryption of a chaotic system are overcome to a certain extent.

Description

technical field [0001] The invention belongs to the field of speech signal processing, and in particular relates to a method for safe transmission of multimedia data. Background technique [0002] With the rise of network technology and the development of digital signal processing technology around the world, voice communication technology has achieved breakthrough development and wider application. However, when the content of voice communication involves personal privacy, commercial secrets and state secrets, people will consider the confidentiality of voice information transmission. At the same time, when voice communication is performed in an actual environment, both parties to the call are easily disturbed by the background noise of the surrounding environment, thereby affecting the effect of communication. Therefore, it is very important to study voice encryption and noise reduction to ensure the security and quality of voice communication. [0003] Voice encryption ...

Claims

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Application Information

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IPC IPC(8): H04L29/06G10L21/02
CPCG10L21/02H04L63/0428
Inventor 周大军
Owner 成都动视时代科技有限公司
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