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Signal compression method and device, signal reconstruction method and device and compressed sensing system

A signal compression and signal reconstruction technology, applied in the field of information processing, can solve problems such as low security and easy to be attacked, and achieve the effect of increasing security

Inactive Publication Date: 2018-10-09
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that in the prior art, the observation matrix of the compressed sensing method has randomness, is easier to be attacked, and has low security

Method used

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  • Signal compression method and device, signal reconstruction method and device and compressed sensing system
  • Signal compression method and device, signal reconstruction method and device and compressed sensing system
  • Signal compression method and device, signal reconstruction method and device and compressed sensing system

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Embodiment 1

[0053] figure 1 It is a flow chart of a signal compression method provided in this embodiment. The signal compression method is applied to the signal sending end, and is described in detail in conjunction with the accompanying drawings as follows:

[0054] Step S101, acquiring signal data in matrix form.

[0055] Optionally, the signal is sampled at a preset sampling frequency. In the compressed sensing method, the sampling frequency does not need to follow the Nyquist sampling theorem, and the original signal can be restored by a suitable reconstruction algorithm at the receiving end.

[0056] Specifically, the signal may be a digital signal or an analog signal.

[0057] The acquisition of signal data in matrix form includes:

[0058] When the signal is a one-dimensional signal, the one-dimensional signal is superimposed into a matrix form.

[0059] When the signal to be collected is a one-dimensional signal, the collected data is superimposed into a matrix form.

[0060] ...

Embodiment 2

[0078] figure 2 It is a flow chart of a signal reconstruction method provided in this embodiment. The signal reconstruction method is applied to the signal receiving end, and is described in detail as follows in conjunction with the accompanying drawings:

[0079] Step S201, receiving the compressed and encrypted data of the original signal.

[0080] The receiving end receives the compressed encrypted data of the original signal after signal compression. The compressed and encrypted data is generated at the sending end and sent from the sending end to the receiving end. The compressed encrypted data is denoted as y.

[0081] Step S202, solving the sparse representation of the original signal matrix according to the encryption rule of the compressed encrypted data.

[0082] Specifically, according to the encryption rule of the compressed encrypted data, the order of columns in the compressed encrypted data y and the observation matrix Φ is transformed, so that the following...

Embodiment 3

[0091] image 3 It is a structural block diagram of a signal compression device provided in this embodiment, and is described in detail as follows in conjunction with the accompanying drawings:

[0092] The signal compression device includes:

[0093] An acquisition module 31, configured to acquire signal data in matrix form;

[0094] An encryption module 32, configured to transform the sequence of rows and / or columns of the signal data according to preset encryption rules to obtain an encryption matrix;

[0095] A compression module 33, configured to multiply the encrypted matrix with a preset observation matrix to obtain compressed encrypted data of the signal data;

[0096] The transmission module 34 is configured to transmit the compressed and encrypted data to the receiving end.

[0097] Optionally, the encryption module 32 is also used for

[0098] Generate a row key and a column key for encrypting the signal data; wherein, the row key is a random sequence of numbers...

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Abstract

The invention discloses a signal compression method and device, a signal reconstruction method and device and a compressed sensing system, and relates to the technical field of information processing.The signal compression method comprises the steps that signal data in a matrix form is acquired; the arrangement order of the rows and / or the columns of the signal data is transformed according to apreset encryption rule to obtain an encrypted matrix; the encrypted matrix is multiplied by a preset observation matrix to obtain compressed and encrypted data of the signal data; and the compressed and encrypted data is transmitted to a receiving end. According to the method, the security of a compressed sensing method is improved on the condition that the complexity of a signal acquisition end is not increased.

Description

technical field [0001] The invention relates to the technical field of information processing, in particular to a signal compression and reconstruction method and device and a compressed sensing system. Background technique [0002] Compressed sensing, also known as compressed sampling. In the development of compressed sensing, compressed sensing has been widely used in various fields due to the characteristics of downsampling, such as radar detection, geological exploration, medical imaging, signal denoising, image super-resolution reconstruction, etc. For example, the patent publication No. CN106600518A discloses an image encryption and decryption method based on compressed sensing visual security and data security. The encryption method includes: firstly using the SHA256 hash function to obtain the 256-bit hash value of the plaintext image as the image secret. Key, and calculate the initial value of the one-dimensional skew tent chaotic map and zigzag scrambling; sparse ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06G06T1/00
CPCG06T1/0021H04L63/0428
Inventor 鲍淑娣陈泽奇陈萌
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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