KR20190035181A - Larygeal stroboscopy - Google Patents

Abstract

Disclosed are a laryngeal stroboscopy and a photographing method thereof. The laryngeal stroboscopy comprises: a camera module for photographing the vocal cords; a light source module for illuminating the vocal cords photographed by the camera module; a voice signal detecting module for detecting a voice signal as a vibration signal; a voice signal processing module for extracting and processing peaks and pitches of the vibration signal detected by the voice signal detecting module; a control module for controlling on/off of the light source module according to the peaks and pitches processed by the voice signal processing module and for controlling photographing of the camera module in response to control of the on/off of the light source module; a storage module for storing an image frame photographed by the camera module according to control of the control module; and an interface module for displaying the image frame stored in the storage module. According to the described laryngeal stroboscopy and the photographing method thereof, a vibration cycle of the voice signal is detected, and accordingly, an on/off cycle of the light source and a photographing cycle of the camera are synchronized to photograph a vibration state of the vocal cords, and thus, it is possible to precisely photograph the vibration state of the vocal cords and utilize the same.

Description

Laryngeal stroboscopy and method of shooting the same

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to stroboscopy, and more specifically, to a laryngeal stroboscope and a method of imaging the same.

The laryngeal stroboscopy is a device for capturing and capturing the movement of the vocal cords.

The vocal cords vibrate about 100-300 times a second and vibrate more than 1000 times when singing. It is not easy to see the movement of the vocal cords or their vibrations in the naked eye.

Thus, the light source is illuminated with the same frequency as the fundamental frequency of the vocal cords by using the laryngoscopic stroboscope to photograph the vibration state. This vibrational state of the vocal cords is seen to be stopped at a certain phase point. The human eye is configured to emit a light source at a frequency equal to the fundamental frequency of the vocal cords, since a residual image is left on the retina for about 0.2 seconds when an image is exposed.

Actually, a sensor is attached to the neck of the patient to detect a vibration period of the vocal cords or a microphone is attached to the laryngeal endoscope, and the fundamental frequency of the patient voice is converted into electromagnetic waves to detect the vibration period.

In practice, in order to match the vibrations of the vocal cords with the light source synchronization of the stroboscopes, a microphone is usually attached to a stethoscope or an electrode is attached to the gate to obtain an EGG signal. The laryngeal lumen is connected to the light source is repeatedly emitted in the light of the vocal cords are usually used to observe.

1. Korean Patent Publication No. 10-2005-0018884 2. Domestic Patent Publication 10-2017-0102792

It is an object of the present invention to provide a laryngostroboscopy.

It is another object of the present invention to provide a method of photographing a laryngeal stroboscope.

The laryngeal stroboscope according to the present invention may further comprise: a voice signal detection module for detecting a voice signal as a vibration signal; A voice signal processing module for extracting and processing peaks and pitches of the vibration signal detected by the voice signal detection module; A light source module for illuminating the vocal cords; A camera module for photographing a vocal cords illuminated by the light source module; A control module for controlling the on / off of the light source module according to the peaks and pitches processed by the voice signal processing module and for controlling the shooting of the camera module in response to on / off control of the light source module; ; A storage module for storing an image frame by photographing the camera module under the control of the control module; And an interface module for displaying an image frame stored in the storage module.

Here, the light source module may be configured to be attached to the laryngeal endoscope.

The camera module may be configured to be attached to the laryngeal endoscope.

The audio signal processing module includes: an amplifying unit for amplifying the audio signal detected by the audio signal detecting module; A gain controller for maintaining the output level of the amplifier constant; And a peak detection / pitch calculation unit for calculating a pitch of the voice signal by detecting one peak within one period from the voice signal amplified by the amplification unit.

The camera module may be constituted by a CCD or a CMOS.

According to another aspect of the present invention, there is provided a method of photographing a laryngoscope stroboscopic comprising the steps of: detecting a voice signal as a vibration signal; Extracting and processing the peaks and pitches of the vibration signals detected by the voice signal detecting module by the voice signal processing module; Controlling the on / off of the light source module according to the peaks and pitches processed by the voice signal processing module and controlling the photographing of the camera module in response to on / off control of the light source module ; Illuminating a vocal cords of the light source module under the control of the control module and photographing the vocal cords in which the camera module is illuminated by the light source module under the control of the control module; The storage module storing an image frame by taking an image of the camera module under the control of the control module; And displaying the image frame stored in the storage module by the interface module.

Here, the light source module may be configured to be attached to the laryngeal endoscope.

The camera module may be configured to be attached to the laryngeal endoscope.

The step of extracting and processing the peaks and pitches of the vibration signal detected by the voice signal processing module by the voice signal processing module may include amplifying the voice signal detected by the voice signal detecting module by the amplifying part, And the peak detection / pitch calculation unit detects one peak within one cycle in the voice signal amplified by the amplification unit to calculate the pitch of the voice signal.

The camera module may be constituted by a CCD or a CMOS.

According to the laryngoscope stroboscope described above and the imaging method thereof, it is configured to detect the vibration period of the voice signal and thereby synchronize the on / off cycle of the light source with the camera imaging period to thereby photograph the laryngeal vibration state, So that the state can be accurately photographed and utilized.

1 is a perspective view of a laryngoscopic stroboscope according to an embodiment of the present invention.
FIG. 2 is a block diagram of a laryngeal stroboscope according to an embodiment of the present invention.
3 is a block diagram of a voice signal processing module according to an embodiment of the present invention.
4 is a graph showing the principle of photography of the laryngeal stroboscope according to an embodiment of the present invention.
5 is a graph illustrating a synchronization structure of a voice and an image according to an embodiment of the present invention.
FIG. 6 is a flowchart of a method of photographing the laryngeal stroboscope according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail to the concrete inventive concept. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of a laryngoscopic stroboscope according to an embodiment of the present invention. FIG. 2 is a block diagram of a laryngoscopic stroboscope according to an embodiment of the present invention. And a signal processing module. FIG. 4 is a graph illustrating a principle of laryngoscopy according to an embodiment of the present invention, and FIG. 5 is a graph illustrating a synchronization structure of a voice and an image according to an embodiment of the present invention.

1 to 3, a laryngoscope 100 according to an exemplary embodiment of the present invention includes a voice signal detection module 110, a voice signal processing module 120, a light source module 130, a camera module 140 ), A control module 150, a storage module 160, and an interface module 170.

The laryngeal stroboscope 100 according to an embodiment of the present invention detects a vibration period of a voice signal and detects a vibration period of the voice signal and an on / off period of the light source module 140, As shown in FIG.

Thus, the vibrating state of the vocal cords can be easily configured and observed.

Hereinafter, the detailed configuration will be described.

The voice signal detection module 110 may be configured to detect a voice signal as a vibration signal. Specifically, the voice signal processing module 120 may be configured to process the voice signal detected by the voice signal detection module 110. [

The audio signal processing module 120 may be configured to include an amplification unit 121, a gain adjustment unit 122, and a peak detection / pitch calculation unit 123.

The amplification unit 121 may be configured to amplify the voice signal detected by the voice signal detection module 121. The amplifying unit 121 may be configured using an audio digital signal processor (DSP), and may be configured to perform a Fourier transform on the voice signal to obtain a desired frequency and sound pressure.

The gain adjusting unit 122 may be configured to maintain the output level of the amplifying unit 121 constant. In the case of sound waves, various waveforms are displayed depending on the pronunciation in the same period. The maximum value of the sound pressure generated by voice sometimes occurs in the same size depending on the pronunciation, so that the synchronization signal can be extracted based on the minimum value of the sound pressure. If the strength of the voice signal is too high, the amplification unit 121 may saturate, so that the gain adjustment unit 122 performs a function of adjusting the gain so as not to amplify the amplification.

The peak detection / pitch calculation unit 123 may be configured to detect a peak within one period of the voice signal amplified by the amplification unit 121 to calculate a pitch of the voice signal.

The light source module 140 may be configured to illuminate the vocal cords. The light source module 130 may be configured to be attached to the laryngoscope.

The light source module 130 is a general recording device. When the image under the illumination of stroboscopic light is viewed by the high-frequency stroboscopic light, the light source module 130 appears bright because of a large amount of light. In addition, if there is no vocalization and no voice synchronization signal is input, no illumination may be obtained at all. Accordingly, the light amount of the light source module 130 may be maintained at a sufficiently high frequency by controlling the amount of light to be inversely proportional to the frequency, and when the synchronization signal is less than a predetermined threshold frequency. In this case, the vocal cords can be observed well even in the absence of vocalization.

The camera module 140 may be configured to photograph the vocal cords. The camera module 140 may be configured to attach to the laryngoscope.

The camera module 140 may be configured to perform photographing in synchronization with the vibrating state of the vocal chords together with the light source module 130 under the control of the control module 150. [

The control module 150 controls on / off of the light source module 140 according to the peaks and pitches processed by the audio signal processing module 120 and controls the on / off control of the light source module 140 And to control the shooting of the camera module 130 correspondingly.

The control module 150 controls and synchronizes the light emission and the photographing of the light source module 130 and the camera module 140 with the same frequency as the fundamental frequency of the vocal cords. During the vocalization, the vibrating state of the vocal cords is stopped As shown in FIG.

The control module 150 can be configured to perform on / off control of the light source module 130 and the camera module 140 at a slightly slower rate after recognizing the fundamental frequency when vowel speech is generated. FIG. 4 shows a control scheme for obtaining a slow image rather than a vibration of an actual vocal cords. In FIG. 4, the upper graph shows the vibration state of the actual vocal cords, and the lower graph shows the shooting time by the control of the control module 150, thereby obtaining slow images of the vocal cords. That is, a slow image of the vibration state can be obtained by setting each photographing time point or a selection time point of an image frame at a predetermined timing slower than the same phase point in the cycle in the vocal fold vibration state.

The storage module 160 may be configured to store an image frame by photographing the camera module 130 under the control of the control module 150. [

The interface module 170 may be configured to display image frames stored in the storage module 160. Interface module 9170) may be configured to select and display an image frame at a specific time point from the image frames stored in the storage module 9160. [ It is possible to select and display a slow image of the vocal fold vibration state after acquiring all the image frames identical to the basic vocal fold vibration as shown in FIG.

In addition, it is possible to appropriately select an image frame as necessary to grasp the vocal tract vibration state.

On the other hand, if the photographing time point and the light-emitting point of time are ideally adjusted by the control module 150 according to the vocal fold frequency, the most suitable image for visually observing the vocal cords can be obtained. However, since a CCD camera or a CMOS camera can normally acquire a field-type screen with a cycle of 1/60 second, A flicker phenomenon occurs on the screen. When the electronic shutter function is operated, more severe flicker may occur.

As shown in FIG. 5, the electronic shutter of the CCD camera or the CMOS camera is opened to a maximum of 1/60 second, the strobe scopes 100 are operated only once in one field in synchronization with the field signal of the camera, .

FIG. 6 is a flowchart of a method of photographing the laryngeal stroboscope according to an embodiment of the present invention.

Referring to FIG. 6, first, the voice signal detection module 110 detects a voice signal as a vibration signal (S101).

Next, the voice signal processing module 120 extracts and processes the peak and pitch of the vibration signal detected by the voice signal detection module 110 (S102).

At this time, the amplifying unit 121 amplifies the voice signal detected by the voice signal detecting module 110, the gain controlling unit 122 maintains the output level of the amplifying unit 121 constant, and the peak detecting / The unit 123 may be configured to detect one peak within one period in the audio signal amplified by the amplifying unit 121 to calculate the pitch of the audio signal.

Next, the control module 150 controls on / off of the light source module 140 according to the peaks and pitches processed by the audio signal processing module 120, and controls the ON / Off control of the camera module 130 (S103).

Here, the camera module 130 and the light source module 140 may be configured to be attached to the laryngeal endoscope.

Next, the light source module 140 illuminates the vocal cords taken by the camera module 130 under the control of the control module 150, and the camera module 130 captures vocal cords in accordance with the control of the control module 150 (S104).

Next, the storage module 160 stores an image frame by taking an image of the camera module 130 under the control of the control module 150 (S105).

Next, the interface module 170 displays the image frame stored in the storage module 160 (S106).

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims. There will be.

110: voice signal detection module
120: audio signal processing module
121:
122:
123: Peak detection / pitch calculation unit
130: Light source module
140: Camera module
150: Control module
160: Storage module
170: Interface module

Claims (4)

A voice signal detection module for detecting a voice signal as a vibration signal;
A voice signal processing module for extracting and processing peaks and pitches of the vibration signal detected by the voice signal detection module;
A light source module for illuminating the vocal cords;
A camera module for photographing a vocal cords illuminated by the light source module;
A control module for controlling the on / off of the light source module according to the peaks and pitches processed by the voice signal processing module and for controlling the shooting of the camera module in response to on / off control of the light source module; ;
A storage module for storing an image frame by photographing the camera module under the control of the control module;
A laryngeal stroboscopy including an interface module for displaying an image frame stored in the storage module. The audio signal processing apparatus according to claim 1,
An amplifying unit for amplifying the voice signal detected by the voice signal detecting module;
A gain controller for maintaining the output level of the amplifier constant;
And a peak detection / pitch calculation unit for calculating a pitch of a voice signal by detecting one peak within one cycle from the voice signal amplified by the amplification unit. A voice signal detection module detecting a voice signal as a vibration signal;
Extracting and processing the peaks and pitches of the vibration signals detected by the voice signal detecting module by the voice signal processing module;
Controlling the on / off of the light source module according to the peaks and pitches processed by the voice signal processing module and controlling the photographing of the camera module in response to on / off control of the light source module ;
Illuminating a vocal cords of the light source module under the control of the control module and photographing the vocal cords in which the camera module is illuminated by the light source module under the control of the control module;
Illuminating a vocal cord to be photographed by the camera module, and photographing the vocal cords in accordance with the control of the control module;
The storage module storing an image frame by taking an image of the camera module under the control of the control module;
Wherein the interface module displays an image frame stored in the storage module. 4. The method of claim 3, wherein the voice signal processing module extracts and processes peaks and pitches of the vibration signal detected by the voice signal detection module,
Wherein the amplifying unit amplifies the voice signal detected by the voice signal detecting module and the gain adjusting unit maintains the output level of the amplifying unit constant and the peak detecting / And calculating the pitch of the voice signal by detecting the peak.

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