WO2018079976A1

WO2018079976A1 - Signal visualization system and signal visualization method

Info

Publication number: WO2018079976A1
Application number: PCT/KR2017/006500
Authority: WO
Inventors: 최광호; 조성진; 류연희; 김준범
Original assignee: 한국 한의학 연구원
Priority date: 2016-10-31
Filing date: 2017-06-21
Publication date: 2018-05-03
Also published as: KR20180047485A; KR101950557B1

Abstract

A signal visualization system according to one embodiment of the present invention comprises: a channel for collecting a plurality of frequencies; a control unit for converting the frequencies collected by the channel into visualization data; and an output unit for outputting the visualization data converted by the control unit, wherein the control unit can divide components of the plurality of frequencies, and collect phase coupling of the components of the frequencies as first data, second data, and third data, and each of the first data, the second data, and the third data can be converted into visualization data by the control unit.

Description

Signal Visualization System and Signal Visualization Method

A system for visualizing a signal is disclosed. Specifically, a system for measuring brain waves through a plurality of channels, calculating a phase coupling using bicoherence, and converting the brain waves measured in each channel into RGB data is disclosed.

EEG is the flow of electricity that occurs when signals are transmitted between the cranial nerves. EEG can be classified into delta wave, theta wave, alpha wave, beta wave, and gamma wave according to the brain's active state (range of vibration frequency).

EEG can determine the state of activity other than the specific, it can be used to progress. Delta waves, for example, appear when you are in a state of meditation or unconsciousness that leads to deep sleep. If the delta wave is higher than the average range in the waking person, it may be a malignant tumor or anesthesia in the cerebral cortex.

EEG measurement measures the brain's function by capturing electrical phenomena in the brain. General EEG recording derives EEG on the scalp and amplifies it by EEG, and collects the amplified electric phenomena, and can receive EEG using a channel.

The EEG measuring apparatus is disclosed in Korean Patent Registration No. 10-1645852 filed “February EEG measuring apparatus and method using a screw electrode and a screw electrode” filed February 5, 2015.

In addition, the bicoherence calculation is disclosed in "Analyzing EEG Stages Using Bicoherence Analysis Technique" published in the January 2006 Electrical Society.

The purpose of the signal visualization system according to one embodiment is to increase the visibility by expressing the frequency phase coupling in color.

Another object of the signal visualization system according to an embodiment is to provide a signal visualization system capable of quickly detecting an abnormality in frequency.

Another object of a signal visualization system according to an embodiment is to provide a signal visualization system capable of detecting a difference between stored frequency data and a collected frequency.

Another object of the signal visualization system according to an embodiment is to provide a signal visualization system for easily diagnosing abnormalities in brain waves.

In one embodiment, a signal visualization system includes: a channel collecting a plurality of frequencies; A controller converting the frequencies collected by the channel into visualization data; And an output unit configured to output the visualization data converted by the controller, wherein the controller divides a plurality of components of the frequencies, respectively, and performs phase coupling between the components of the frequencies with the first data and the second. And the first data, the second data, and the third data may be converted into visualization data by the controller.

In addition, the frequency includes a first frequency and a second frequency, the component of the divided frequency includes a first frequency band and a second frequency band, the first data is the first frequency of the first frequency An average value of local phase coupling values calculated in the first frequency band of the band and the second frequency, wherein the second data is the second frequency of the first frequency band and the second frequency of the first frequency; A mean value of local phase coupling values calculated in a frequency band or the second frequency band of the first frequency and the first frequency band of the first frequency, wherein the third data is the second of the first frequency; It may be an average value of local phase coupling values calculated in the frequency band and the second frequency band of the second frequency.

The controller may convert the first data into first color data, the second data into second color data, and the third data into third color data, respectively, and the first color data, the second color data, and the first color data. The three color data are composed of red data (R), green data (G), and blue data (B), respectively, and may be combined to express one color.

In addition, the red data (R), the green data (G), the blue data (B) is the equation

Obtained and the N _R is the number of the first data, wherein N _G is the number of the second data, wherein N _B is the number of the third data in the

Is an equation that is a bicoherence equation

Obtained by

Means the first data,

Means second data,

May mean third data.

The first frequency band may be one of a low frequency band or a high frequency band, and the second frequency band may be another one of a low frequency band or a high frequency band.

Alternatively, a signal visualization method according to an embodiment may include collecting a plurality of frequencies through a channel; Calculating a phase coupling value for each frequency component of the collected frequencies; Averaging the phase coupling values by region; Converting an average value for each region of the phase coupling into color data; And outputting the converted visualization data.

In addition, the phase coupling value region includes a first region, a second region, and a third region divided by the frequency components, and the color data includes red data R, green data G, and blue data ( B), wherein the average value for each region of the phase coupling in the first region is converted into red data R, and the average value for each region of the phase coupling in the second region is represented by green data ( G), the average value for each region of the phase coupling in the third data is converted into blue data (B), and the red data (R), green data (G), and blue data (B) It can be combined into visualization data.

In addition, the visualization data is output as two-dimensional data through the output unit, the two-dimensional data may be arranged as the arrangement of the channel.

According to the signal visualization system according to an embodiment, the frequency phase coupling may be expressed in color to increase visibility.

According to the signal visualization system according to an embodiment, there is provided a signal visualization system capable of quickly detecting an abnormality in frequency.

According to a signal visualization system according to an embodiment, there is provided a signal visualization system capable of detecting a difference between stored frequency data and a collected frequency.

According to the signal visualization system according to an embodiment, a signal visualization system for easily diagnosing an abnormality of an EEG is provided.

1A to 1C illustrate channel-specific colors of brain waves output by a signal visualization system according to an exemplary embodiment.

2A and 2C illustrate a method in which a signal visualization system converts collected frequencies into color data.

Hereinafter, the embodiments will be described in detail with reference to the accompanying drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the embodiment, when it is determined that the detailed description of the related well-known configuration or function interferes with the understanding of the embodiment, the detailed description thereof will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected or connected to that other component, but between components It will be understood that may be "connected", "coupled" or "connected".

The signal visualization system according to an embodiment may include a channel, a controller, and an output unit.

The channel may collect a plurality of frequencies. For example, a plurality of channels may be attached to surround the subject's head, and each channel may collect one or more frequencies.

The controller may convert the frequencies collected by the channel into visualization data.

The controller may calculate phase coupling of two frequencies among a plurality of frequencies collected in one channel, calculate phase coupling with frequencies collected in adjacent channels, and may be a reference for a preset comparison. It is also possible to calculate phase coupling of frequency data, or frequency data of consecutive frequencies, eg, 5 second intervals.

In detail, the frequency may be a first frequency and a second frequency, and the controller may divide the first frequency and the second frequency into a first frequency band and a second frequency band. The first frequency band may be a low frequency band and the second frequency band may be a high frequency band. For example, the first frequency band may be 1 Hz to 12 Hz, and the second frequency band may be 13 Hz to 50 Hz.

The controller may collect, as first data, an average value of the local phase coupling in the first frequency band of the first frequency and the second frequency, and generate a first frequency band of the first frequency and the second frequency. The average value of the local phase coupling in the second frequency band or the second frequency band of the first frequency and the first frequency band of the second frequency may be collected as second data, the second of the first frequency and the second frequency. The average value of the local phase coupling in the frequency band can be collected as third data. This is described in detail with reference to FIG. 2B below.

In addition, the controller may convert the first data into the red data R, convert the second data into the green data G, and convert the third data into the blue data B, respectively.

In detail, the controller may calculate red data, blue data, and green data by using Equations 1 and 2 below.

Equation 1

In the red data (R) may mean the average of the first data, the green data (G) may mean the average of the second data, the blue data (B) may mean the average of the third data, the N _R may be the number of the first data, the N _G may be the number of the second data, and N _B may be the number of the third data. Also

Means the first data,

Means second data,

May mean third data. Also,

Is the number of phase coupling, the bicoherence equation

Can be obtained.

The controller may combine the red data R, the green data G, and the blue data B into the visualization data.

For example, the control unit may weight the red data (R), the green data (G), and the blue data (B) to convert them to numerical values of 0 to 255, and combine the numerical data to R of 0 to 255. RGB data, which is one of types of visualization data formed by a combination of a value, a G value, and a B value, may be configured.

The output unit may output the visualization data combined by the controller in color. For example, the output unit may arrange and output color data visualized for each channel in two dimensions as illustrated in FIGS. 1A to 1C.

FIG. 1A illustrates an output of a signal visualization system in which phase coupling is relatively strongly calculated and relatively bright in all three regions for each channel.

Referring to FIG. 1A, frequencies collected from channels disposed in the upper left of the channels have a color close to white, which indicates that the R, G, and B values of the RGB data are all calculated strongly. Specifically, each of the channels disposed in the upper left side of the channels illustrated in FIG. 1A may include a first frequency and a first frequency in the first frequency bands of each of the first and second frequencies measured in the respective channels. It can be seen that the phase coupling in the two frequency bands and in the second frequency bands are both strongly formed. Also, it can be seen that phase couplings of the channels shown at the bottom of the channels shown in FIG. 1A are relatively weak compared to the channels disposed at the top.

FIG. 1B shows the outputs of a signal visualization system in which phase coupling is computed with a relatively medium intensity in all three regions for each channel and output in a relatively medium manner.

Like in FIG. 1A, in FIG. 1B, the brightness of the channels disposed in the middle portion is relatively bright and the brightness of the channels disposed in the right portion is relatively low. It can be seen that the phase coupling of the frequency that is stronger than the surroundings and collected in the channels located near the right is relatively weaker than the surroundings. In addition, since the output shown in FIG. 2B is generally reddish,

R value is relatively strong and G value and B value are weak.

FIG. 1C illustrates outputs of a signal visualization system in which phase coupling is relatively weakly calculated and relatively dark in all three regions for each channel.

Since FIG. 1C is relatively dark compared to FIGS. 1A and 2B, it can be seen that the RGB data are all low, and thus, phase coupling is weakly calculated in each of the channels.

2A illustrates a step of designating a color for each comparison band of two frequencies.

FIG. 2B shows an example of FIG. 2A.

FIG. 2C illustrates a step of combining the average red data, the average blue data, and the average green data values extracted by the respective data regions shown in FIG. 2B into RGB data to express the colors.

The first frequency and the second frequency may be divided into two frequency bands, and as shown in FIG. 2A, the local phase coupling of the first frequency and the second frequency may be divided into four regions.

Specifically, as shown in Figure 2b, the first frequency (

) And the second frequency (

) May have a frequency band of 1 to 50 Hz, a frequency band of 1 to 12 Hz may be designated as a first frequency band which is a low frequency band, and a frequency band of 13 to 50 Hz may be designated as a second frequency band which is a low frequency band.

In addition, phase coupling between each frequency component may be calculated locally as depicted with each block in FIG. 2B, and each local phase coupling size may be different.

First frequency (

) And the second frequency (

) Are all areas of the first data band and may be shown as red data R, as shown in FIG. 2B.

) And the second frequency (

) When one of the two is the first frequency band and the other is the second frequency band, the area is the area of the second data and may be shown as green data (G).

) And the second frequency (

The area when all are the second frequency band is the area of the third data and may be shown as blue data (B).

An average value of each of the area of the first data, the area of the second data, and the area of the third data may constitute the first data, the second data, and the third data.

FIG. 2C illustrates a step of combining the first data, the second data, and the third data values extracted by the respective data regions shown in FIG. 2B into RGB data and expressing them in color.

In FIG. 2B, the phase coupling of the red data region R is generally orange, and thus the numerical value may be about 0.8. The phase coupling of the green data region G has a large orange distribution, and a little blue and green are included in the phase coupling. In addition, it can be inferred that the phase coupling of the blue data area B is mainly blue and green, and the numerical value is about 0.48.

Referring to FIG. 2C, exemplary values of the phase coupling calculated in FIG. 2B are 0.8050 for the red data region R, 0.6592 for the green data region G, and 0.4853 for the blue data region B. FIG. This may be expressed as a brown series formed by combining a large R value, a medium G value, and a smallest B value.

As a result, the signal visualization system according to the exemplary embodiment may improve the visibility of the frequency analysis by expressing the frequency phase coupling in color, thereby quickly detecting an abnormality of the frequency, and also storing the stored frequency data and the collected frequency. The difference between the two can be detected, and brain wave abnormalities can be easily diagnosed.

As described above, the embodiments of the present invention have been described by specific embodiments, such as specific components, and limited embodiments and drawings, but these are provided only to help a more general understanding of the present invention, and the present invention is limited to the above embodiments. Various modifications and variations can be made by those skilled in the art to which the present invention pertains. Therefore, the spirit of the present invention should not be limited to the described embodiments, and all of the equivalents and equivalents of the claims, as well as the following claims, will fall within the scope of the present invention. .

Claims

A channel collecting a plurality of frequencies;

A controller converting the frequencies collected by the channel into visualization data; And

An output unit for outputting the visualization data converted by the control unit;

Including,

The controller divides a plurality of components of the frequency, respectively, and collects phase coupling between components of the frequency into first data, second data, and third data,

Wherein each of the first data, the second data and the third data are converted into visualization data by the controller.
The method of claim 1,

The frequency includes a first frequency and a second frequency,

The divided components of the frequency include a first frequency band and a second frequency band,

The first data is an average value of local phase coupling values calculated in the first frequency band of the first frequency and the first frequency band of the second frequency,

The second data is calculated in the first frequency band of the first frequency and the second frequency band of the second frequency or in the second frequency band of the first frequency and the first frequency band of the first frequency. Is the average of the local phase coupling values

And the third data is an average of local phase coupling values calculated in the second frequency band of the first frequency and the second frequency band of the second frequency.
The method of claim 1,

The controller converts the first data into first color data, the second data into second color data, and the third data into third color data, respectively.

The first color data, the second color data and the third color data are composed of red data R, green data G and blue data B, respectively.

A signal visualization system, in combination, represented by one color.
The method of claim 3, wherein

The red data (R), the green data (G), the blue data (B)

Obtained by

The N R is the number of the first data,

The N G is the number of the second data,

The N B is the number of the third data,

remind
Is a bicoherence expression

Obtained by

Means the first data,

Means second data,

Denotes third data.
The method of claim 1,

Wherein the first frequency band is one of a low frequency band or a high frequency band, and the second frequency band is the other one of a low frequency band or a high frequency band.
Collecting a plurality of frequencies through the channel;

Calculating a phase coupling value for each frequency component of the collected frequencies;

Averaging the phase coupling values by region;

Converting an average value for each region of the phase coupling into color data;

Outputting the converted visualization data;

Including a signal visualization method.
The method of claim 6,

The region of the phase coupling value includes a first region, a second region, and a third region divided by the frequency components,

The color data includes red data (R), green data (G), and blue data (B).

The region-specific average value of the phase coupling in the first region is converted into red data R, and the region-specific mean value of the phase coupling in the second region is converted into green data G, The average value for each region of the phase coupling in the third data is converted into blue data (B),

Said red data (R), green data (G) and blue data (B) are combined into visualization data.
The method of claim 6,

The visualization data is output as two-dimensional data through an output unit,

And the two-dimensional data is arranged in an arrangement of the channel.