JPH03268737A - Living body monitoring recorder - Google Patents

Abstract

PURPOSE:To obviate roughness and flickering of a raster and to improve the picture quality of a composite image by converting a video signal from a video camera and a living body signal from a living body signal detecting part into video signals of non-interlace, respectively, synthesizing these video signals and executing the monitoring. CONSTITUTION:The recorder is constituted of a living body signal detecting part (an electroencephalograph and an electrocardiograph, etc.) 2 for amplifying a living body signal (a brain wave and an electrocardiogram, etc.) s1 from an electrode installed in a person 1 to be examined, a video camera 3 for monitoring the person 1 to be examined, a scan converter 7 for converting a video signal v1 from the video camera 3 into a video signal vn1 of non- interlace, a waveform memory 8 for converting living signals s2, s4 from the living body signal detecting part 2 into a video signal (a living body waveform) vn2 of non-interlace, a video signal synthesizing circuit 9 for synthesizing the video signal vn1 from the scan converter 7 and the video signal vn2 from the waveform memory 8, and a high scan monitor 10 corresponding to non-interlace for displaying a composite video signal V from the video signal synthesizing circuit 9 as a composite image on the same screen.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention monitors an image of a subject captured by a video camera and an image obtained by converting biological signals into video signals simultaneously on the same screen. The present invention relates to a biological monitoring recording device that records video data on a VTR.

[Summary of the invention]

The present invention simultaneously monitors the image of the subject captured by a video camera and the image obtained by converting the biosignal from the biosignal detector into a video signal on the same screen, and further records the video data on a VTR. In the biological monitoring recording device consisting of the video signal from the video camera or the VT
a first conversion circuit that converts the video signal recorded in R into a non-interlaced video signal; and a recording unit separate from the biological signal from the biological signal detection unit or the video signal from the video camera in the VTR. a second conversion circuit that converts the biosignal recorded in the video signal into a non-interlaced video signal; a video signal synthesis circuit that combines the non-interlaced video signals from the first and second conversion circuits; By configuring a monitor device that displays the synthesized video signal from the video signal synthesis circuit as a synthesized image on the same screen, it is possible to improve the image quality of the synthesized image displayed from the monitor device, and furthermore improve the quality of the synthesized image displayed by the monitor device. Even if the transition is frozen (stopped), the biological waveform can be reliably displayed, allowing clear biological measurements to be performed.

[Prior Art] Recently, in various biometric fields including electroencephalogram measurement, there has been an increasing need to decipher biosignals while monitoring a subject. Particularly when measuring patients with explosive sounds, comparing changes in the patient before and after seizures with biological signals at the same time will help provide clear interpretation. A biological monitoring recording device is known as a medical monitoring device mainly for such purposes.

As shown in FIG. 4, the conventional biological monitoring recording device includes a biological signal detection unit (
For example, electroencephalograph, electrocardiograph, etc.) (22) and the amplified biosignal s2 from the biosignal detection unit (22) as a video signal (
A video signal V from the waveform memory (23) that converts the biological waveform (biological waveform) to v+, the video camera (24) that monitors the subject (2I), and the waveform memory (23).

and a video signal synthesis circuit (25) for synthesizing the video signal V2 from the video camera (24), and the video signal synthesis circuit (25).
V that records the composite video signal V from 5) in the video recording section VT (see Figure 7) on the surface layer of the videotape (T).
It consists of a monitor device (27) that displays the composite video signal V from the video signal synthesis circuit (25) as a composite image on the same screen.

That is, an electrode is attached to a subject (21), and a biosignal s1 such as an electroencephalogram detected from the electrode is sent to a biosignal detection unit (22).
Amplify it. Then, the amplified biological signals (analog waveforms) s2 of several channels (generally 14 channels) output from the biological signal detection unit (22) are stored in the waveform memory (23).
The video signal V is converted into a video signal V.

This waveform memory (23) is a biological signal (analog signal)
After converting s2 into a digital signal with an A/D converter, it is stored in a video RAM (image memory) corresponding to one screen, and converted into a 1-bit signal corresponding to the pixel of the monitor device (27) on the screen (waveform). ) into a video signal v, to be created. On the other hand, the video camera (24) that captured the subject (21)
) is synthesized with the video signal (2) from the waveform memory (23) in the next stage video signal synthesis circuit (25). Then, the composite video signal V from the video signal synthesis circuit (25) is recorded on the VTR (26) and displayed on the same screen as a composite image on the monitor device (27). In addition, if the VTR (26) is played back, a composite image of the recorded biological waveform and the subject (21) can be displayed on the monitor device (27).
) can be displayed on the same screen. According to this biological monitoring recording device, as shown in FIG. 5, an image can be created in which the image of the subject and the biological waveform are combined.
Changes in the subject (21) and biological signals can be monitored simultaneously on the same screen.

[Problem to be solved by the invention] However, the video camera (24), VTR (26), and monitor device (27) used in conventional biological monitoring recording devices are interlaced (jumping).
It is a scanning video method. In this interlaced scanning, as shown in FIG. 6, scanning lines! is scanned every other line to create a complete 1 in odd and even fields.
The screen (frame) is completed.

Therefore, the number of scanning lines in one field is 262.5, and one screen is 30 frames per second.

Normally, in biological monitoring recording devices, the biological waveform and bank (background) are used to make the biological waveform display easier to see.
It is necessary to make the contrast stronger (that is, make the waveform brighter and the background darker). However, in conventional biological monitoring and recording devices, scanning is performed using an interlaced method as described above, and therefore, when the contrast is increased, line flicker (flickering) peculiar to the interlaced method becomes noticeable.

In addition, regarding the playback of recorded video tapes, VTR (
26) The tape feeding may be temporarily stopped (paused) to check the biological waveform image. In this case, VTR(
26), as shown in Figure 7, can reproduce only half of one screen, that is, the odd numbered field (or even numbered field), so when the waveform appears interrupted or the amplitude of the waveform is small, the entire (or invisible) field may be reproduced. arise.

As described above, the conventional playback monitoring and recording apparatus uses the interlaced method, so it has the disadvantage that the image quality deteriorates significantly and clear biological measurements cannot be made.

The present invention has been made in view of the above points, and its purpose is to improve the image quality of a composite image displayed from a monitor device, and to freeze (stop) the transition of biological waveforms. Another object of the present invention is to provide a biological monitoring recording device that can reliably display biological waveforms and perform clear biological measurements.

[Means to solve the problem]

The present invention simultaneously monitors an image of a subject (1) captured by a video camera (3) and an image obtained by converting a biological signal from a biological signal detection unit (2) into a video signal on the same screen. ,
Furthermore, in the biological monitoring recording device (A) which records the video data on the VTR (5), the video signal vl from the video camera (3) or the video signal V recorded on the VTR (5) is recorded. Non-interlaced video signal V
The first conversion circuit (scan converter (7)) that converts the biosignal S to ll+ and the biosignal detection unit (2)
! , or a video camera (3) in a VTR (5)
A second conversion circuit (waveform memory (8)) that converts the biological signal sr recorded in a recording unit separate from the video signal v1 from the video signal v1 into a non-interlaced video signal V; A video signal synthesis circuit (9) that synthesizes the non-interlaced video signals Vnl and v72 from the conversion circuits (7) and (8), and a composite video signal V from the video signal synthesis circuit (9) as a composite image. and a monitor device (10) that displays on the same screen.

[Operation] In the biological monitoring recording device (A) of the present invention described above, the video signal V from the interlaced video camera (3) is converted into a non-interlaced video signal by the first conversion circuit (7). 1 and converts the biosignal S2 from the biosignal detection unit (2) into the second conversion circuit (8
) Non-interlaced video signal (biological waveform)■7
2, and these video signals V, lI, and vka□ are combined and monitored. On the other hand, regarding the recording of the VTR (5), the video signal V from the video camera (3) and the biological signal s2 from the biological signal detection section (2) are recorded in the recording sections on each side. For example, a video signal v1 from a video camera (3) is recorded on a video recording section VT of a videotape (T), and a biological signal s2 from a biological signal detector (2) is recorded on an audio recording section AT. Then, when reproducing the VTR (5), the video signal vr reproduced from the video recording section VT is converted into a non-interlaced video signal Vnl by the first conversion circuit (7), and the video signal vr is converted from the audio recording section AT. The reproduced biological signal sr is converted into a non-interlaced video signal (biological waveform) Vr+2 by the second conversion circuit (8), and these video signals (2) are converted in the same manner as above. , and V. Combine and monitor 2.

According to the configuration of the present invention, raster roughness and line flicker caused by the interlacing method are eliminated by the double-density non-interlacing method, and the image quality of the composite image displayed on the monitor device (10) is improved. Improvements can be made. Also, when recording data to the VTR (5), the biological signal s2 is converted into the video signal V of the subject (1).
, is recorded separately, and when playing back the VTR (5), the video of the patient (1) and the video of the biological waveform are combined, so if you want to freeze (stop) the transition of the biological waveform. , without having to pause the VTR (5),
Only the biological waveform can be frozen, and the biological waveform can be reliably displayed. Furthermore, the display portion of the biological waveform does not cause deterioration in image quality due to reproduction by the VTR (5).

[Example] Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 3.

Figure 1 shows the biological monitoring recording device (
It is a block diagram which shows the structure of A).

As shown in the figure, this biological monitoring recording device (A) includes a biological signal detection unit (for example, electroencephalograph, electrocardiograph, etc.) (2), a video camera (3) that monitors the subject (1), and several channels of amplified biological signals S2 from the biological signal detection unit (2)
A modem circuit (4) that modulates or demodulates the video signal v1 from the video camera (3) is recorded on the video recording section of the video tape, and a modulation signal (biological signal) S from the modem circuit (4) is recorded. Selectively switches between the VTR (5) recorded on the audio recording section of the videotape, the biosignal S2 from the biosignal detection section (2), and the demodulated signal (biosignal) S4 from the modem circuit (4). The video signal v1 and VTR(
a switching unit (6) having a switch (6b) for selectively switching the reproduced video signal vr from the video camera (3), or the video signal v1 from the video camera (3) or the VTR (5);
) a scan converter (7) that converts the reciprocating video signal v, from the source to a non-interlace video signal Vnl;
A waveform memory (8) that converts the biological signal sz from the biological signal generator (2) or the demodulated signal sd from the modem circuit (4) into a non-interlaced video signal (biological waveform) vl.
and the video signal Vyi from the scan converter (7)
A video signal synthesis circuit (9) that synthesizes the video signal v7□ from 1 and the waveform memory (8), and a non-interlaced system that displays the composite video signal V from the video signal synthesis circuit (9) as a composite image on the same screen. It consists of a corresponding high scan monitor device (1o). In addition, the above modem circuit (4)
modulates the biological signal s2 that has a high frequency component outside the voice band into a signal that has a frequency component within the voice band, or demodulates the biological signal that has been modulated to have a frequency component within the voice band into the original biological signal. It is something to do.

Therefore, the interlace (7) Bl! where the subject (1) was captured by the video camera (3)! The 3-image signal v is converted into a non-interlaced video signal Vt1 by the scan converter (7).
The biosignal S+ from the electrode attached to the subject (1) is amplified by the biosignal detection unit (2), and then converted into a non-interlaced video signal ( biological waveform) is converted to VFI2 (see Figure 3). Here, as shown in FIG. 2, the scan converter (7) includes a Y/C separation circuit (11), a timing generation circuit (12), an A/D converter (13), and a control circuit ( 14), a line memory (15), and a D/A converter (16). Note that Y indicates a luminance signal and C indicates a color signal. Then, the interlaced video signal vI@Y/C separation circuit (11) from the video camera (3)
converting the signals vR9vG and v into a composite synchronization signal St,
Among them, RGB signals vl, vG, and V are supplied to an A/D converter (13), and a composite synchronization signal S is supplied to a timing generation circuit (12).

The timing generation circuit (12) generates the lock C and control signal se necessary for each circuit, that is, the A/D
converter (13), control circuit (14) and D/A converter (
6). RG from Y/C separation circuit (11)
The B signals v@, vG, and vl are converted into digital signals d+t, d6, and d by an A/D converter (13), and then supplied to a control circuit (14). The control circuit (14) receives digital signals d+t, d from the A/D converter (13).
a and d are sequentially sent to the line memory (15), written into the memory for l scanning lines (lines), and line interpolation is performed. Convert to a non-interlaced signal.The line memory (15) may be replaced with a frame memory.In this case, since the video signal v1 input to the scan converter (7) is an interlaced video signal. , two systems of video signals, odd field and even field, are written while performing double density conversion according to the clock C and control signal sC from the timing generation circuit (12).Therefore, the line memory (15) or frame memory is , the double density vertical RGB signals, that is, the RGB signals for one frame are stored.Then, the control circuit (14) uses the clock C from the timing generation circuit (12) and the control circuit Sc. Accordingly, data (digital RGB signals d.

d6 and d++), and the next stage D/A converter (1
6). Then, the digital RGB signal d8°d6 from the control circuit (14) is sent to the D/A converter (16).
and dl are analog RGB signals "lI+aG and a,
to obtain a non-interlaced video signal VRI.

In addition, the waveform memory (8) converts the biological signal (analog signal) Sl from the biological signal detector (2) into a digital signal using an A/D converter, and then converts the biological signal (analog signal) Sl into a digital signal corresponding to one screen.
It is stored in M (image memory) and converted into a video signal ■7□ for creating a screen (waveform) by replacing it with a 1-bit signal corresponding to the pixel of the monitor device (10). At this time, since the conversion is performed at twice the horizontal frequency of the normal (interlace method),
Non-interlaced video signals v, 2 are output from this waveform memory (8).

Then, scan converter (7) and waveform memory (
After the non-interlaced video signals Vll and V from 8) are synthesized in the next stage video signal synthesis circuit (9), the synthesized video signal V is sent to the next stage high scan monitor device (10). As shown in the figure, the images are displayed on the same screen as a composite image. The scanning method in the monitor device (10) is a non-interlaced method, and as shown in Fig. 3, this non-interlaced method doubles the horizontal frequency while keeping the field frequency (vertical frequency) the same, and scans per field. Double the number of lines. This doubles the density per scanning line and improves line flicker.

On the other hand, when recording the VTR (5), the subject (1
) is recorded as is from the video camera (3) onto the surface video recording portion VT of the video tape (T) via the video head VH (see FIG. 7). This recorded video does not include any biological waveform video.

The biological waveform is the biological signal st from the biological signal detection unit (2).
is modulated by the modem circuit (4) and recorded in the deep audio recording section AT of the video tape (T) in the VTR (5) via the audio head AH (see FIG. 7). That is, the image of the subject (1) and the biological signal S2 are
Record separately within TR(5).

Next, when reproducing the VTR (5), each switch (6a) and (6b) of the switching unit (6) is switched in the direction shown by the broken line, so that the input of the scan converter (7) is Video signal V from video camera (3)
.

The input of the waveform memory (8) is switched to the reproduced video signal vr from V and TR (5), and the input of the waveform memory (8) is switched to the biological signal detector (2).
The biological signal s2 from the VTR (5) is switched to the reproduced biological signal S1 (more precisely, the demodulated signal S4 from the modem circuit (4)). In particular, the reproduced biological signal S is demodulated into a biological signal sd by an intermediate modem circuit (4) and then supplied to the waveform memory (8). And VTR (
The reproduced video signal v from 5) is sent to a scan converter (
The biological signal S4 from the modem circuit (4) is converted into a non-interlaced video signal Vat at a waveform memory (8). After that, the non-interlaced video signals v1 and v7□ from the scan converter (7) and waveform memory (8) are combined in the next stage video signal synthesis circuit (9), and then the combined video signal ■ is sent to the next stage. The high-scan monitor device (10) displays the composite image on the same screen.

Also, if you want to stop the biological waveform image during playback of the VTR (5), use the freeze (freeze) operation of the waveform memory (8).
stop). That is, in the waveform memory (8), writing of data to the video RAM is prohibited, and the writing of data to the video RAM is prohibited.
Only read from.

As described above, according to this example, the video signal 1 from the interlaced video camera (3) is converted into a non-interlaced video signal Vl by the scan converter (7).
At the same time, the biological signal s2 from the biological signal detection unit (2) is converted into a non-interlaced video signal (biological waveform) V++2 in the waveform memory (8), and these video signals Vll+ and v, , 2 Since the raster roughness and line flicker caused by the interlace method are eliminated by the double-density non-interlace method, the monitor device (lO)
The image quality of the composite image displayed can be improved. Therefore, even if the contrast between the waveform and the background is strengthened, the fringe, 7, etc. are not noticeable, and it is possible to make the display of the biological waveform easier to see.

Regarding the recording of the VTR (5), the video signal V from the video camera (3) and the biosignal S2 from the biosignal detector (2) are recorded by entering the recording section on each side.

For example, a video signal v from a video camera (3).

is recorded on the video recording section VT of the videotape, and the biosignal S2 from the biosignal detector (2) is recorded on the audio recording section A.
Recorded in T. Then, when playing back the VTR (5), the playback video signal V played back from the video recording section VT is converted into a non-interlaced video signal Vr+1 by the scan converter (7), and the audio recording section A, After demodulating the biosignal s reproduced from T via the modem circuit (4), it is converted into a non-interlaced video signal (biological waveform) vn□ in the waveform memory (8), and these video signals are converted in the same manner as above. V, , and v, z are combined and monitored. That is, when recording data on the VTR (5), the biological signal st is recorded separately from the video signal v1 of the patient (1), and when the VTR (5) is played back, the biological signal st is recorded separately from the video signal v1 of the patient (1). Since the video in 1) and the video of the biological waveform are combined, if you want to freeze (stop) the transition of the biological waveform, use V T
It becomes possible to freeze only the biological waveform without stopping (pausing) R(5). Therefore, the waveform image is not displayed intermittently or is not displayed at all, and a still image of the biological waveform can be reliably and clearly displayed.

〔Effect of the invention〕

According to the biological monitoring recording device of the present invention, it is possible to improve the image quality of the composite image of the subject and the biological waveform displayed from the monitor device, and to ensure that the biological waveform is recorded even if the transition of the biological waveform is frozen. It can be displayed clearly and clearly, and clear biological measurements can be performed.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing a biological monitoring recording device according to this embodiment, Fig. 2 is a block diagram showing a scan converter according to this embodiment, and Fig. 3 is an explanation showing a non-interlace method according to this embodiment. 4 is a block diagram showing a conventional biological monitoring recording device, FIG. 5 is an explanatory diagram showing an example of a monitor screen, FIG. 6 is an explanatory diagram showing an interlace method, and FIG. 7 is a video tape FIG. (A) is a biological monitoring recording device, (1) is a subject,
(2) is a biological signal detection unit, (3) is a video camera, (4
) is a modem circuit, (5) is a VTR1, (6) is a switching unit, (7) is a scan converter, (8) is a waveform memory, (9) is a video signal synthesis circuit, (10) is a high scan monitor device, (11) is a Y/C separation circuit, (12)
is a timing generation circuit, (13) is an A/D converter, (1
4) is a control circuit, (15) is a line memory, and (16) is a D/A converter.

Claims (1)

[Claims] An image captured by a video camera of the subject and an image obtained by converting the biological signal from the biological signal detection unit into a video signal are simultaneously monitored on the same screen, and the video data is further transferred to a VTR. A biological monitoring recording device comprising: a first conversion circuit that converts a video signal from the video camera or a video signal recorded on the VTR into a non-interlaced video signal; or a second conversion circuit that converts the biological signal recorded in a recording section separate from the video signal from the video camera in the VTR into a non-interlaced video signal; A biological monitoring device comprising a video signal synthesis circuit that synthesizes non-interlaced video signals from a conversion circuit, and a monitor device that displays the synthesized video signal from the video signal synthesis circuit as a composite image on the same screen. Device.