CN107874756A - The precise synchronization method of eeg collection system and video acquisition system - Google Patents
The precise synchronization method of eeg collection system and video acquisition system Download PDFInfo
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- CN107874756A CN107874756A CN201711158843.4A CN201711158843A CN107874756A CN 107874756 A CN107874756 A CN 107874756A CN 201711158843 A CN201711158843 A CN 201711158843A CN 107874756 A CN107874756 A CN 107874756A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/369—Electroencephalography [EEG]
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- A—HUMAN NECESSITIES
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/40—Detecting, measuring or recording for evaluating the nervous system
- A61B5/4076—Diagnosing or monitoring particular conditions of the nervous system
- A61B5/4094—Diagnosing or monitoring seizure diseases, e.g. epilepsy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/04—Synchronising
- H04N5/06—Generation of synchronising signals
- H04N5/067—Arrangements or circuits at the transmitter end
- H04N5/0675—Arrangements or circuits at the transmitter end for mixing the synchronising signals with the picture signal or mutually
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Abstract
The invention provides a kind of precise synchronization method of eeg collection system and video acquisition system, the synchronous method includes：Optical stimulation signal is sent to measurand timing, while corresponding mark is added in the data frame of EEG signals, the mark is exported together with the data of the EEG signals；Shoot the optical stimulation signal, video data of the output containing the optical stimulation signal；Wherein vision signal contains timestamp with the EEG signals；Based on the timestamp of mark and optical stimulation signal in the video data in the eeg data, the data of the EEG signals and aliging for the video data are carried out, the data after alignment are stored.The method of the present invention can realize that video capture device is synchronous with the signal of brain wave acquisition equipment, ± 1 frame of the time error in frame of video in 24 hours.
Description
Technical field
The present invention relates to a kind of video brain electric system, EEG signals and vision signal precise synchronization are especially that by
Video brain electric system.
Background technology
Video-EEG is to combine brain wave acquisition equipment with video capture device, records patient's During Seizures
In video, audio data, doctor can according to Video Document observe limbs of patient action, analyze patient episode when clinical table
It is existing, check analysis synchronous with electroencephalographic record, it can more accurately judge the type of epileptic attack and possible starting position, simultaneously
It is accurate to grasp patient and change in the active state of each period and corresponding electroencephalogram, greatly improve illness accuracy rate of diagnosis and
Operating efficiency.
But because the sample frequency and sampling clock of EEG signals and vision signal have differences, the same time can be caused
Two paths of signals time of occurrence is poor, and clinically patient's epilepsy detection often needs to monitor 24 hours, in the case of this long range monitoring, more
Need solve the accumulative caused synchronous error of long-range, to ensure the accuracy of clinical judgment reference.
It is current published few to solving the solution method that the problem proposed.Number of patent application is
CN201710085360.X, entitled " a kind of method and mobile terminal for showing EEG data " Chinese invention patent
Application disclose it is a kind of by extracting the initial time stamp information of eeg data and video data come the starting point for broadcasting of aliging, with reality
The display methods synchronously played both existing.But to have ignored alignment caused by the error of the respective clock of two groups of data inclined for this method
Difference, still suffer from the accumulation synchronism deviation problem after a period of time.Therefore, this area be badly in need of one kind realize EEG signals and video letter
Number precise synchronization method, reach in 24 hours time error in ± 1 frame of frame of video.
The content of the invention
It is an object of the invention to provide one kind to realize EEG signals and vision signal precise synchronization method.
Technical scheme is as follows.
According to an aspect of the present invention, the invention provides a kind of side for realizing that vision signal is synchronous with EEG signals
Method, the vision signal contain timestamp with the EEG signals, the described method comprises the following steps：
Step S1, optical stimulation signal is sent to measurand timing, while added accordingly in the data frame of EEG signals
Mark, the mark is exported together with the data of the EEG signals；
Step S2, shoot the optical stimulation signal, video data of the output containing the optical stimulation signal；
Step S3, the time of mark and optical stimulation signal in the video data in the data based on the EEG signals
Stamp, carries out the data of the EEG signals and aliging for the video data, the data after alignment is stored.
Preferably, the video data and the timestamp of the data of the EEG signals use same signal source calibration.
Preferably, the data of the video data and/or the EEG signals are used and wirelessly sent.
Preferably, align further bag of the data with the video data of the EEG signals is carried out in the step S3
Include：The time tolerance of the mark and optical stimulation signal in the video data in the eeg data is calculated, is carried out correspondingly
The amendment and renewal of time tolerance.
According to another aspect of the present invention, the invention provides a kind of synchronous acquisition vision signal and the side of EEG signals
Method, comprise the following steps：
Step S10, the EEG signals of measurand are gathered, timestamp is added in the data of the EEG signals and is deposited
Storage；
Step S20, the vision signal of measurand is shot, add timestamp in the video data that shooting obtains and timestamp is inclined
Shifting amount is simultaneously stored；
Step S30, whether with the video data need calibrate, if desired then go to step if judging the data of the EEG signals of collection
Rapid S31, otherwise go to step S10；
Step S31, optical stimulation signal is sent to measurand timing, while added accordingly in the data frame of EEG signals
Mark, the mark is exported together with the data of the EEG signals；
Step S32, shoot the optical stimulation signal, video data of the output containing the optical stimulation signal；
Step S33, the time of mark and optical stimulation signal in the video data in the data based on the EEG signals
Stamp, carries out the data of the EEG signals and aliging for the video data, the data after alignment is stored；Go to step
S10。
Preferably, the value of the timestamp offset is 0 when not calibrated.
Preferably, the data of the EEG signals and aliging further for the video data are carried out in the step S33
Including：The time tolerance of the mark and optical stimulation signal in the video data in the eeg data is calculated, according to right
Time tolerance is answered to be modified and update timestamp offset.
Preferably, in the step S30, according to perform calibration interval time judge collection EEG signals data with
Whether the video data, which needs, is calibrated, and calibration is performed if interval time reaches designated value, does not otherwise perform calibration.
According to another aspect of the invention, present invention also offers a kind of video eeg collection system, including：
Brain wave acquisition equipment, it can gather the EEG signals of measurand, and the time is added in the data of the EEG signals
Stab and export；
Video capture device, the vision signal of measurand is shot, it is timely that timestamp is added in the video data that shooting obtains
Between stab and offset and export；
Control device, it includes timestamp alignment means and storage device；Wherein described timestamp alignment means can be in data
Calibration is timed to the brain wave acquisition equipment and the video capture device at interval of a period of time in gatherer process；It is described
Storage device can store the brain wave acquisition equipment and the data of video capture device output.
Preferably, the process of the timing alignment includes：
The brain wave acquisition equipment sends optical stimulation signal to measurand timing, while adds in the data frame of EEG signals
Add corresponding mark, the mark is exported together with the data of the EEG signals；
The video capture device shoots the optical stimulation signal, video data of the output containing the optical stimulation signal；
The timestamp alignment means are based on the mark in the eeg data and optical stimulation signal in the video data
Timestamp, carry out the data of the EEG signals and aliging for the video data；
The storage device is stored the data after alignment.
By above technical scheme, the present invention can realize EEG signals and vision signal precise synchronization, in 24 hours
± 1 frame of the time error in frame of video.
Brief description of the drawings
Fig. 1 is the video brain electric system structural representation of the present invention.
Fig. 2 is that the video brain electric system in Fig. 1 realizes that the Method And Principle of EEG signals and vision signal synchronous acquisition is illustrated
Figure.
Embodiment
As shown in Figure 1, the invention provides a kind of video eeg collection system, including：
Brain wave acquisition equipment, it can gather the EEG signals of measurand, and the time is added in the data of the EEG signals
Stab and export；
Video capture device, the vision signal of measurand is shot, it is timely that timestamp is added in the video data that shooting obtains
Between stab and offset and export；
Control device, i.e. computer, it includes timestamp alignment means and storage device；Wherein described timestamp alignment means can
School is timed to the brain wave acquisition equipment and the video capture device at interval of a period of time in data acquisition
It is accurate；The storage device can store the brain wave acquisition equipment and the data of video capture device output.
Although the pass of the video data and the timestamp in the data of the EEG signals is not limited in the present embodiment
System, but it will be appreciated by those skilled in the art that timestamp in the data of the EEG signals with the video data
Timestamp should be precise synchronization.In a preferred embodiment, the data of the video data and the EEG signals
Timestamp use same signal source calibration.
Although not limiting the video data and the transmission medium of the data of the EEG signals in the present embodiment,
It will be appreciated by those skilled in the art that the data of the video data and the EEG signals can select it is any applicable existing
Data transfer mode in technology.In a preferred embodiment, the data two of the video data and the EEG signals
At least one in person is transmitted by wireless communication protocol.
Preferably, the process of the timing alignment includes：
The brain wave acquisition equipment sends optical stimulation signal to measurand timing, while adds in the data frame of EEG signals
Add corresponding mark, the mark is exported together with the data of the EEG signals；
The video capture device shoots the optical stimulation signal, video data of the output containing the optical stimulation signal；
The timestamp alignment means are based on the mark in the eeg data and optical stimulation signal in the video data
Timestamp, carry out the data of the EEG signals and aliging for the video data；
The storage device is stored the data after alignment.
As shown in Figure 2, the invention provides a kind of synchronous acquisition vision signal and the method for EEG signals, including it is following
Step：
Step S10, the EEG signals of measurand are gathered, timestamp is added in the data of the EEG signals and is deposited
Storage；
Step S20, the vision signal of measurand is shot, add timestamp in the video data that shooting obtains and timestamp is inclined
Shifting amount is simultaneously stored；
Step S30, whether with the video data need calibrate, if desired then go to step if judging the data of the EEG signals of collection
Rapid S31, otherwise go to step S10；
Step S31, optical stimulation signal is sent to measurand timing, while added accordingly in the data frame of EEG signals
Mark, the mark is exported together with the data of the EEG signals；
Step S32, shoot the optical stimulation signal, video data of the output containing the optical stimulation signal；
Step S33, the time of mark and optical stimulation signal in the video data in the data based on the EEG signals
Stamp, carries out the data of the EEG signals and aliging for the video data, the data after alignment is stored；Go to step
S10。
Preferably, the value of the timestamp offset is 0 when not calibrated.
Preferably, the data of the EEG signals and aliging further for the video data are carried out in the step S33
Including：The time tolerance of the mark and optical stimulation signal in the video data in the eeg data is calculated, according to right
Time tolerance is answered to be modified and update timestamp offset.
Preferably, in the step S30, according to perform calibration interval time judge collection EEG signals data with
Whether the video data, which needs, is calibrated, and calibration is performed if interval time reaches designated value, does not otherwise perform calibration.
Video eeg collection system described in above example, video capture device and brain wave acquisition equipment can be realized
Signal is synchronous, ± 1 frame of the time error in frame of video in 24 hours.
Claims (10)
1. a kind of method for realizing that vision signal is synchronous with EEG signals, the vision signal contains having time with the EEG signals
Stamp, it is characterised in that the described method comprises the following steps：
Step S1, optical stimulation signal is sent to measurand timing, while added accordingly in the data frame of EEG signals
Mark, the mark is exported together with the data of the EEG signals；
Step S2, shoot the optical stimulation signal, video data of the output containing the optical stimulation signal；
Step S3, the time of mark and optical stimulation signal in the video data in the data based on the EEG signals
Stamp, carries out the data of the EEG signals and aliging for the video data, the data after alignment is stored.
2. the method according to claim 1 for realizing that vision signal is synchronous with EEG signals, it is characterised in that the video
The timestamp of data and the data of the EEG signals uses same signal source calibration.
3. the method according to claim 1 for realizing that vision signal is synchronous with EEG signals, it is characterised in that the video
Data and/or the data of the EEG signals, which use, wirelessly to be sent.
4. the method according to claim 1 for realizing that vision signal is synchronous with EEG signals, it is characterised in that the step
The data that the EEG signals are carried out in S3 further comprise with aliging for the video data：Calculate in the eeg data
The time tolerance of mark and optical stimulation signal in the video data, carry out the amendment and renewal of correspondent time difference.
5. a kind of method of synchronous acquisition vision signal and EEG signals, comprises the following steps：
Step S10, the EEG signals of measurand are gathered, timestamp is added in the data of the EEG signals and is deposited
Storage；
Step S20, the vision signal of measurand is shot, add timestamp in the video data that shooting obtains and timestamp is inclined
Shifting amount is simultaneously stored；
Step S30, whether with the video data need calibrate, if desired then go to step if judging the data of the EEG signals of collection
Rapid S31, otherwise go to step S10；
Step S31, optical stimulation signal is sent to measurand timing, while added accordingly in the data frame of EEG signals
Mark, the mark is exported together with the data of the EEG signals；
Step S32, shoot the optical stimulation signal, video data of the output containing the optical stimulation signal；
Step S33, the time of mark and optical stimulation signal in the video data in the data based on the EEG signals
Stamp, carries out the data of the EEG signals and aliging for the video data, the data after alignment is stored；Go to step
S10。
6. the method for synchronous acquisition vision signal according to claim 5 and EEG signals, it is characterised in that not calibrated
The value of Shi Suoshu timestamp offsets is 0.
7. the method for synchronous acquisition vision signal according to claim 5 and EEG signals, it is characterised in that the step
The data that the EEG signals are carried out in S33 further comprise with aliging for the video data：Calculate in the eeg data
Mark with the video data in optical stimulation signal time tolerance, according to correspondent time difference to timestamp offset
Amount is modified and updated.
8. the method for synchronous acquisition vision signal according to claim 5 and EEG signals, it is characterised in that the step
Whether in S30, the data of the EEG signals of collection are judged according to the interval time for performing calibration needs school with the video data
Standard, calibration is performed if interval time reaches designated value, does not otherwise perform calibration.
9. a kind of video eeg collection system, including：
Brain wave acquisition equipment, it can gather the EEG signals of measurand, and the time is added in the data of the EEG signals
Stab and export；
Video capture device, the vision signal of measurand is shot, it is timely that timestamp is added in the video data that shooting obtains
Between stab and offset and export；
Control device, it includes timestamp alignment means and storage device；Wherein described timestamp alignment means can be in data
Calibration is timed to the brain wave acquisition equipment and the video capture device at interval of a period of time in gatherer process；It is described
Storage device can store the brain wave acquisition equipment and the data of video capture device output.
10. video eeg collection system according to claim 9, it is characterised in that the process of the timing alignment includes：
The brain wave acquisition equipment sends optical stimulation signal to measurand timing, while adds in the data frame of EEG signals
Add corresponding mark, the mark is exported together with the data of the EEG signals；
The video capture device shoots the optical stimulation signal, video data of the output containing the optical stimulation signal；
The timestamp alignment means are based on the mark in the eeg data and optical stimulation signal in the video data
Timestamp, carry out the data of the EEG signals and aliging for the video data；
The storage device is stored the data after alignment.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108647645A (en) * | 2018-05-11 | 2018-10-12 | 广州飞宇智能科技有限公司 | A kind of multi-modal Diagnosis of Epilepsy system and method based on video analysis |
| CN109711260A (en) * | 2018-11-28 | 2019-05-03 | 易念科技（深圳）有限公司 | Detection method, terminal device and the medium of fatigue state |
| CN111035385A (en) * | 2020-01-04 | 2020-04-21 | 上海健康医学院 | Video synchronization device and method for visual evoked potential detection |
| CN111611860A (en) * | 2020-04-22 | 2020-09-01 | 西南大学 | Micro-expression occurrence detection method and detection system |
| CN113017567A (en) * | 2021-03-01 | 2021-06-25 | 西安交通大学医学院第一附属医院 | Deep learning technology-based children epilepsy detection method |
| CN113143290A (en) * | 2021-04-30 | 2021-07-23 | 西安臻泰智能科技有限公司 | Data synchronization method of electroencephalogram device and electroencephalogram device |
| CN113197551A (en) * | 2021-05-07 | 2021-08-03 | 中国医学科学院生物医学工程研究所 | Multimode physiological nerve signal detection and experimental stimulation time alignment method |
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| CN118303899A (en) * | 2024-06-05 | 2024-07-09 | 北京大学 | Electroencephalogram signal processing method, device, equipment and computer readable medium |
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| CN108647645A (en) * | 2018-05-11 | 2018-10-12 | 广州飞宇智能科技有限公司 | A kind of multi-modal Diagnosis of Epilepsy system and method based on video analysis |
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| CN109711260A (en) * | 2018-11-28 | 2019-05-03 | 易念科技（深圳）有限公司 | Detection method, terminal device and the medium of fatigue state |
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| CN111611860A (en) * | 2020-04-22 | 2020-09-01 | 西南大学 | Micro-expression occurrence detection method and detection system |
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| WO2021213165A1 (en) * | 2020-04-24 | 2021-10-28 | 华为技术有限公司 | Multi-source data processing method, electronic device and computer-readable storage medium |
| CN113017567A (en) * | 2021-03-01 | 2021-06-25 | 西安交通大学医学院第一附属医院 | Deep learning technology-based children epilepsy detection method |
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| CN113143290B (en) * | 2021-04-30 | 2024-01-19 | 西安臻泰智能科技有限公司 | Data synchronization method of electroencephalogram device and electroencephalogram device |
| CN113197551A (en) * | 2021-05-07 | 2021-08-03 | 中国医学科学院生物医学工程研究所 | Multimode physiological nerve signal detection and experimental stimulation time alignment method |
| CN113261976A (en) * | 2021-05-07 | 2021-08-17 | 电子科技大学 | Electroencephalogram high-frequency oscillation signal acquisition system |
| CN113197551B (en) * | 2021-05-07 | 2023-08-04 | 中国医学科学院生物医学工程研究所 | Multimode physiological nerve signal detection and experimental stimulation time alignment method |
| CN114035538A (en) * | 2021-10-25 | 2022-02-11 | 武汉亚为技术有限责任公司 | LabVIEW-based multi-channel heterogeneous signal synchronous acquisition method |
| CN118303899A (en) * | 2024-06-05 | 2024-07-09 | 北京大学 | Electroencephalogram signal processing method, device, equipment and computer readable medium |
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