JP5580629B2 - Video display device - Google Patents

Description

  The present invention relates to a video display device used for medical purposes, for example.

  A conventional video display device used for medical purposes has the following configuration.

  That is, a main body case, an input terminal provided in the main body case, an input unit connected to the input terminal, a display image generation unit that generates a display image of a video signal from the input unit, and the display image And a display unit connected to the generation unit.

  The display image generation unit performs a motion detection process used for compressing the display image across the video frames, and converts an interlaced image to a progressive image with higher image accuracy according to the determination result of the motion detection. Conversion was performed (for example, Patent Document 1 below).

JP 2005-348369 A

  The problem with the conventional example is that the motion detection process is complicated and the load is large.

  That is, for example, a medical video display apparatus must simultaneously display a plurality of different input video signals on a plurality of display screens via a display image generation unit. As described above, the motion detection process as a pre-processing for compressing the display image across the frames, for example, the compression of the moving image such as MPEG, is to detect the motion of all the pixels of the display images across the frame for the video compression. Therefore, there is a problem that the load on the display image generation unit increases because of complicated processing.

  In particular, in a medical video display device, when performing motion detection processing for each of a plurality of different input video signals and simultaneously displaying them on a plurality of display screens, this processing becomes complicated and the load is large. It had the problem of becoming.

  Accordingly, the present invention aims to simplify the motion detection process and reduce the load.

In order to achieve this object, the present invention provides a main body case, an input terminal provided in the main body case, an input section for capturing a video signal input from the input terminal, and a video signal from the input section. A motion detection unit that compares video data between frames and determines whether the video is a still image or a moving image; a display image generation unit that generates a display image based on a determination result of the motion detection unit; A display unit that displays a display image from the display image generation unit, and the motion detection unit is configured to determine predetermined vertical and horizontal pixels of a field video that constitutes a frame video signal of video data to be compared. divided by the number of divisions in a grid, or the dynamic comparing means for comparing the image data of the pixel group including the pixels in these grid as a comparison point, the image from the result of the comparison means is a still picture And determining means for determining is, configured to have, thereby is to achieve the intended purpose.

As described above, the present invention provides a main body case, an input terminal provided in the main body case, an input section that takes in a video signal input from the input terminal, and an image between frames of the video signal from the input section. A motion detection unit that compares data and determines whether the video is a still image or a moving image, a display image generation unit that generates a display image based on a determination result of the motion detection unit, and the display image generation A display unit configured to display a display image from the unit, wherein the motion detection unit grids pixels in a vertical direction and a horizontal direction of a field video constituting a frame video signal of video data to be compared with a predetermined number of divisions. divided into Jo determines comparing means for comparing the image data of the pixel group including the pixels in these grid as a comparison point, whether the video from the result of the comparison means is a moving or a still image Since those having a structure having a constant section, to simplify the process, it is possible to reduce the load.

  That is, in the present invention, as processing for detecting motion between frames of a video signal, the data to be compared is set as a point, that is, discretely set, thereby reducing the amount of data to be compared and simplifying the processing. By doing so, the load can be reduced.

  Therefore, for example, in a medical video display device, when performing motion detection processing for each of a plurality of different input video signals and simultaneously displaying on a plurality of display screens, as means for reducing the load of display processing Is extremely effective.

The perspective view which shows one Embodiment of this invention Front view Rear view Bottom view Same control block diagram Control block diagram of the input unit Block diagram of the image signal converter Operation explanatory diagram of the image signal converter Operation explanatory diagram of the image signal converter Main block diagram of the image signal converter Operation explanatory diagram of the main part of the image signal converter Block diagram of the display image generation unit Block diagram of the image forming unit Operation explanatory diagram of the image forming unit Operation explanatory diagram of the image forming unit Operation explanatory diagram of the image forming unit Block diagram of the motion detector Flow chart of the motion detection unit

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows a state in which an embodiment of the present invention is placed in a medical site, specifically, an operating room. A patient 2 lies on the upper surface of an operating table 1 and doctors 3 and 4 receive an endoscope camera 5. , 6 shows a state in which surgery is performed. In this case, the doctor 3 confirms the state of the affected part while viewing the video display device 7 facing the patient 2, and the doctor 4 looks at the video display device 8 facing the patient 2. While confirming the condition of the affected area.

  That is, both the doctor 3 and the doctor 4 display the positional relationship of the patient 2 with respect to themselves on the video display devices 7 and 8 as they are. Specifically, the information of the endoscope camera 5 on the right hand side of the doctor 3 is displayed on the right side of the video display device 7, and the information of the endoscope camera 6 on the left hand side of the doctor 3 is displayed on the video display device. 7 is displayed on the left side.

  The information of the endoscope camera 5 on the left hand side of the doctor 4 is displayed on the left side of the video display device 8, and the information of the endoscope camera 6 on the right hand side of the doctor 4 is directed to the video display device 8. Displayed on the right.

  In other words, the video display devices 7 and 8 display the information of the endoscopic cameras 5 and 6 at the opposite positions, but display in accordance with the feeling of the doctors 3 and 4. Therefore, in the video display device 7, the left hand side of the patient 2 is displayed downward, and conversely in the video display device 8, the right hand side of the patient 2 is displayed downward.

  In the video display device 7, the video of the endoscopic camera 5 is displayed on the right side, and the video of the endoscopic camera 6 is displayed on the left side. Conversely, in the video display device 8, the video of the endoscopic camera 5 is displayed. On the left side, the video of the endoscope camera 6 is displayed on the right side.

  In any case, the video display devices 7 and 8 display the information of the endoscopic cameras 5 and 6 at the opposite positions, but display according to the feeling of the doctors 3 and 4.

  Furthermore, in the video display devices 7 and 8 of the present embodiment, as shown in FIG. 1, the video from the endoscope cameras 5 and 6 is displayed on the left and right screens, and further, the display screen 7a of the third screen is displayed. 8a, and a monitor screen such as a patient's electrocardiogram is displayed on the display screens 7a and 8a as a sub display.

  In this way, by displaying information such as an operation image and an electrocardiogram on one image display device, a doctor can perform an operation with the line of sight concentrated on the image display device without shifting the line of sight around. It is.

  The video display devices 7 and 8 have the same configuration, and as shown in FIGS. 2 to 4, a display unit 10 is provided on the front side of the main body case 9, and further on the lower surface side of the main body case 9. A plurality of input terminals 11, 12, 13, 14, and 15 are provided. Of these, the input terminal 11 is a separate and composite video terminal, 12 is a component video terminal, 13 is an RGB terminal, 14 is an SDI terminal (serial digital interface), and 15 is a DVI terminal (digital visual interface). It has become.

  The endoscope cameras 5 and 6 are connected to different terminals of the SDI terminal 14. As will be described in detail later, for example, an electrocardiogram is supplied to the RGB terminal 13 from a personal computer (not shown).

  FIG. 5 shows a control block diagram, in which the endoscopic cameras 5 and 6, an input unit 16 to which an electrocardiogram is input, and an image signal conversion unit 17 to which the input unit 16 is connected are connected to generate a display image. A display unit 10, an image signal conversion unit 17, an operation unit 19 for operating the display image generation unit 18, and the display unit 10.

  In FIG. 5 and thereafter, input 1 indicates an input from the endoscope camera 5, input 2 indicates an input from the endoscope camera 6, and input 3 indicates an electrocardiogram.

  First, in the input unit 16, since the input 3 is analog data, it is converted into digital data in the same manner as the inputs 1 and 2.

  In this state, as shown in FIG. 6, from the SDI receiver 20 that has received the input 1, the vertical synchronizing signal 1, horizontal synchronizing signal 1, clock 1 (74.176 MHz), effective area signal 1, and image data 1 are displayed. It is output to the signal converter 17.

  Further, from the SDI receiver 21 that has received the input 2, the vertical synchronization signal 2, the horizontal synchronization signal 2, the clock 2 (74.176 MHz), the effective area signal 2, and the image data 2 are output to the image signal conversion unit 17.

  Furthermore, from the image signal A / D conversion processor 22 that has received the input 3, the vertical synchronizing signal 3, the horizontal synchronizing signal 3, the clock 3 (162 MHz), the effective area signal 3, and the image data 3 are converted into an image signal converting unit. 17 is output.

  The effective area signal is a signal indicating an effective area in the horizontal and vertical directions on the display screen of the image data.

  The image signal converter 17 that has received such a signal has a configuration as shown in FIG.

  That is, the vertical synchronization signal 1 and the horizontal synchronization signal 1 are input to the synchronization resetting unit 23, and the clock 1, the valid area signal 1, and the image data 1 are input to the asynchronous FIFO unit 24.

  Further, the vertical synchronization signal 2 and the horizontal synchronization signal 2 are input to the synchronization resetting unit 25, and the clock 2, the effective area signal 2, and the image data 2 are input to the asynchronous FIFO unit 26.

  Furthermore, the vertical synchronization signal 3 and the horizontal synchronization signal 3 are input to the synchronization resetting unit 27, and the clock 3, the valid area signal 3, and the image data 3 are input to the asynchronous FIFO unit 28.

  In addition, from the synchronization resetting units 23, 25, and 27, vertical and horizontal synchronization signals are input to the first screen input selection unit 29, the second screen input selection unit 30, and the third screen input selection unit 30a. To be supplied. The first screen input selection unit 29 sets the screen on the right side of the display unit 10, and the second screen input selection unit 30 sets the screen on the left side of the display unit 10. Although the details will be described later, the third screen input selection unit 30a is used for a third screen that displays an auxiliary image from a monitoring device such as an electrocardiogram.

  Furthermore, video information is supplied from the asynchronous FIFO units 24, 26, and 28 to the first screen input selection unit 29, the second screen input selection unit 30, and the third screen input selection unit 30a. It has become.

  Further, from the first screen input selection unit 29 to the display image generation unit 18 of FIG. 5, as the first screen image data, the first screen vertical synchronization signal, the first screen horizontal synchronization signal, and the first screen use Data enable and image data for the first screen are supplied.

  Further, from the second screen input selection unit 30 to the display image generation unit 18 of FIG. 5, as the second screen image data, the second screen vertical synchronization signal, the second screen horizontal synchronization signal, and the second screen use are displayed. Data enable and second screen image data are supplied.

  Further, from the third screen input selection unit 30a to the display image generation unit 18 in FIG. 5, as the third screen image data, the third screen vertical synchronization signal, the third screen horizontal synchronization signal, and the third screen use are displayed. Data enable and third screen image data are supplied.

  The operation unit 19 shown in FIG. 7 sets how the video is displayed on the left and right sides of the video display devices 7 and 8 as shown in FIG. 1, and further, the third screen described above. This is used for display setting.

  FIG. 8 illustrates the operation of the synchronization resetting units 23, 25, and 27. In this embodiment, the clocks 1 and 2 are 74.176 MHz, as shown in FIG. Re-latching at 150 MHz.

  That is, both the clocks 1 and 2 are 150 MHz, and the vertical synchronization signals 1 and 2 and the horizontal synchronization signals 1 and 2 are latched again at 150 MHz.

  Specifically, FIG. 8A shows clocks 1 and 2, and the vertical synchronizing signal synchronizes one screen, so it is necessary to match the rising edge with the rising edge of the horizontal synchronizing signal. . However, as shown in FIG. 8B, when the latch is simply re-latched at 150 MHz in this state, the rising edges of the vertical synchronizing signal and the horizontal synchronizing signal are shifted.

  Therefore, as shown in FIG. 9, the shift of the rising edge of the vertical synchronization signal and the horizontal synchronization signal is detected by the edge detection pulse, and this edge detection pulse is delayed by a larger delay than the phase error and re-latched to re-schedule The rise of the signal can be matched.

  On the contrary, since the clock 3 is 162 MHz, it is again latched at 150 MHz by the synchronization resetting unit 27 so that the rising edges of the vertical synchronizing signal 3 and the horizontal synchronizing signal 3 are combined.

  FIG. 10 shows the operation of the asynchronous FIFO units 24, 26, and 28. The image data 1, 2, and 3 in FIG. 7 are all supplied to the image data bus expansion unit 31 with a total 30-bit width of R10 bits, G10 bits, and B10 bits, and even pixel data (30 bits) and odd pixel data (30 Bit) and are supplied to the asynchronous FIFO units 24, 26, and 28 in this state. 7 is supplied to the write control unit 32, and the write enable is supplied to the asynchronous FIFO units 24, 26, and 30.

As described above, since the synchronous resetting units 23, 25, and 27 are re-latched at the clock of 150 MHz, the asynchronous FIFO units 24, 26, and 28 are also re-latched at 150 MHz, thereby the asynchronous FIFO unit 24. , 26 and 28, data enable, even pixel data (30 bits), toward the first screen input selection unit 29 and the second screen input selection unit 30,
Odd pixel data (30 bits) is supplied. FIG. 11 shows even pixel data (30 bits),
A state for forming odd pixel data (30 bits) is shown, and FIG. 11A shows an output from the input unit 16. That is, the image data 1 is supplied to the series of pixels 0, 1, 2, 3,..., N, N + 1. As shown in FIG. 11B, the processing speed in the display image generation unit 18 is increased by separating even pixel data (30 bits) and odd pixel data (30 bits).

  As described above, the frequency used to synchronize the synchronization signal of the input signal from the input unit 16 used in the synchronization resetting unit 27 is 150 MHz, and this frequency is the maximum of the clock synchronized with the pixel data from the input unit 16. The frequency is 162 MHz or less. As described above, 30-bit pixel data is separated into 30-bit even pixels and 30-bit odd pixels and processed in parallel, so that the processing speed is substantially doubled. That is, input processing can be performed for the pixel data synchronization frequency of the input unit 16 up to 300 MHz, which is twice 150 MHz.

  In FIG. 11B, the write enable exists only in the pixel data 2 to N because the effective area signal exists only in the pixel data 2 to N as shown in FIG. 11A. is there.

  FIG. 12 shows the display image generation unit 18, and from the first screen input selection unit 29, data enable, even pixel data (30 bits), odd pixel data (30 bits) are displayed on the first screen line. The data is input to the memory 33 and the first screen line memory 34. That is, in the present embodiment, as shown in FIG. 1, the first screen line memory 33 and the first screen line memory 34 are provided in order to cause the video display device 7 to display a rearranged display. The first screen line memory 33 and the first screen line memory 34 are output to the line memory control unit 35.

  Further, a second screen line memory 36 and a second screen line memory 37 are provided in order to cause the video display device 8 to change the display, and the second screen line memory 37 is provided. An output is also made from the second screen line memory 37 to the line memory control unit 35.

  In order to display on the third screen, a third screen line memory 36a and a third screen line memory 37a are provided. These third screen line memory 36a and the third screen line memory are provided. An output is also made from the memory 37 a to the line memory control unit 35.

  Further, the line memory control unit 35 outputs to the image forming unit 38, and the image forming unit 38 performs size conversion and rate conversion for displaying one screen on the display unit 10. The single screen created in this way is temporarily stored in the frame memory 39 and is supplied again to the image quality processing unit 40 via the image forming unit 38, where it is used for color adjustment and unification into RGB signals. Then, after the differential signal conversion unit 41 converts the 1 and 0 signals into differential signals, an output is made to the display unit 10.

  Note that reference numeral 42 in FIG. 12 denotes a clock generator, and an image processing clock for signal processing is supplied at 150 MHz as described above. The image forming unit 38 and the image quality processing unit 40 have 132 MHz as a panel display clock. Is supplied.

  As described above, in the present embodiment, the images and electrocardiograms of the endoscope cameras 5 and 6 are displayed on the image display devices 7 and 8, the doctors 3 and 4 are themselves, the patient 2, and the endoscope cameras 5 and 6. It is possible to project the arrangement relations so that each of them can be realized, and at this time, even if the frequency of the synchronization signal does not match, it can be projected as a clear image by resetting the synchronization.

  Therefore, the doctors 3 and 4 can perform appropriate treatment while visually observing the video display devices 7 and 8 facing each other through the patient 2.

  In the present embodiment, one pixel is 30 bits. However, the present invention is not limited to this, and one pixel may have another number of bits such as 24 bits.

  In the present embodiment, the effective pixel data is even-numbered pixel data and odd-numbered pixel data in the first screen input selection unit 29 or the asynchronous FIFO units 24, 26, and 28 in the previous stage of the second screen input selection unit 30. Although the processing is divided into data, optimization (cutout) of the display image is performed by resetting the effective area in the subsequent stage of the first screen input selection unit 29 or the second screen input selection unit 30. You may go.

  Now that the basic configuration and operation of the present embodiment have been understood, the characteristic points of the present embodiment will be described below.

  In this embodiment, as shown in FIG. 1, in addition to the images of the two endoscopic cameras described above, information such as a monitoring device such as an electrocardiogram, a still image showing an affected area before surgery, a moving image, etc. Is displayed on the third screen so that the three screens can be projected simultaneously.

  In such a medical image, progressive conversion is performed to synthesize interlaced two-field images into one image in order to improve the resolution of the image quality of the affected area and reduce screen flicker. As a pre-process for this conversion, as a pre-process for this conversion, image motion detection is performed to determine whether the image is a still image or a moving image, and then progressive conversion corresponding to the determination result is performed.

  FIG. 13 shows an internal block diagram of the image forming unit (38 in FIG. 12).

  Inside the image forming unit (38 in FIG. 12), there is a first and second screen motion detection unit 43 that detects the motion of the frame images of the first and second screens, and is stored in the frame memory (39 in FIG. 12). The first screen image data and the second screen image data are input to the first and second screen motion detectors 43 under the control of the memory controller 44.

  Next, the motion detector 43 for the first and second screens performs the motion detection between the frame images as a conventional technique, that is, the motion detection by comparing the whole frame image data, determines the degree of motion, and the determination result The frame rate conversion unit 45 performs progressive conversion corresponding to the above.

  Furthermore, in the image forming unit (38 in FIG. 12), a third screen motion detection unit that detects motion of the video displayed on the third screen, separately from the first and second screen motion detection units 43. 46, and the third screen image data stored in the frame memory (39 in FIG. 12) is controlled by the memory controller 44 and input to the third screen motion detector 46.

  Next, the third screen motion detection unit 46 performs motion detection between frame images, that is, motion detection by comparing so-called frame image data, determines the degree of motion, and performs progressive conversion corresponding to the determination result. The frame rate conversion unit 45 performs the configuration.

  Here, as the contents to be noted, the motion detection means in the third screen motion detection unit 46 is different from the motion detection means in the first and second screen motion detection units 43 described above in the following points. Is different.

  The difference is that the motion detection means in the first and second screen motion detection unit 43 has two consecutive frame N video data 47a and 47b and frame (N + 1) video data 48a and 48b as shown in FIG. The motion data is detected by comparing the entire video data of field 1 (odd field) and field 2 (even field).

  On the other hand, the motion detection means in the third screen motion detection unit 46 does not compare the entire two consecutive frame video data, but sets a comparison point and compares the entire frame video data. Rather than being a discrete comparison.

  FIG. 15 explains how frame data is compared in this motion detection.

  The screen image shown in FIG. 15 illustrates full HD, that is, interlaced field video data (horizontal 1920 pixels, vertical 540 pixels) 49 in a frame screen of 1920 pixels in the horizontal direction and 1080 pixels in the vertical direction. is there.

  In the present embodiment, the frame image data is divided into 8 parts in the horizontal and vertical directions and divided into 8 * 8 lattices, and the data of the pixel groups 51 in the vicinity of the respective lattice points 50 is obtained. The motion detection is performed by comparing the continuous frame video data, and it is determined whether the frame video composed of the field video data is a moving image or a still image.

  Next, the comparison method will be described more specifically.

FIG. 16 is an enlarged view of the pixel group 51 which is a comparison point in FIG.
The pixel group 51 as a comparison point is composed of a total of 16 pixels from the lattice point 50, 8 pixels in the horizontal direction and 2 lines in the vertical direction. Each pixel data is composed of Y (luminance) and color difference (Cb, Cr).

  Next, a combination of four pixels is formed for the pixel group 51 composed of the 16 pixels described above. As this combination method, a first pixel group 51a in which a total of four pixels of 0 pixel and 1 pixel of 0 line, 0 pixel and 1 pixel of 1 line are combined, 1 pixel and 2 pixels of 0 line, 1 A second pixel set 51b that combines a total of 4 pixels, 1 pixel and 2 pixels, a third pixel that combines a total of 4 pixels, that is, 2 pixels and 3 pixels of 0 line, 2 pixels and 3 pixels of 1 line A pixel group 51c, a fourth pixel group 51d that combines a total of four pixels, that is, three pixels and four pixels of 0 line, three pixels and four pixels of one line, four pixels and five pixels of one line, and one line 5th pixel group 51e combining a total of 4 pixels of 4 pixels and 5 pixels, a 6th pixel combining a total of 4 pixels of 5 pixels and 6 pixels of 0 line, 5 pixels of 1 line and 6 pixels Set 51f, 6 pixels and 7 pixels in 0 line, 6 pixels and 7 pixels in 1 line A total of a seventh pixel group 51g combining a total of four pixels, a total of seven pixels in the 0 line, 0 pixels in the next pixel group in the horizontal direction, 7 pixels in the one line, and 0 pixels in the next pixel group in the horizontal direction Filtering processing is performed on the eighth pixel group 51h obtained by combining four pixels and a total of eight pixel groups (51a to 51h), thereby generating eight filtering values.

  The eighth pixel set 51h is a combination of the eighth pixel in the horizontal direction from the lattice point 50 and the zero pixel of the next pixel group in the ninth horizontal direction. As a specific combination, Instead of using the 0th pixel of the next pixel group in the 9th horizontal direction, the 8th 7 pixels may be combined in the horizontal direction from the grid point 50, or a predetermined fixed value may be combined. It's okay. This is because, when this function is configured by a digital circuit, the circuit configuration can be further simplified if it is configured in units of 8 pixels, which is the cube of 2.

  Next, the calculation of this filtering will be described. As described above, the data of each pixel is composed of Y (luminance) and color differences (Cb, Cr), and about the Y (luminance) component in this, An average value of Y (luminance) data of four pixels of each pixel group (51a to 51h) is obtained, and the average value is used as pixel group data. That is, the pixel group 51 is set at 8 * 8 = 64 lattice points (50), and the pixel group 51 is further set to eight pixel sets (51a to 51h), and these eight pixel sets (51a to 51h). Since each has a filtering value, one field image has 8 * 8 * 8 = 512 comparison points.

  The Y (luminance) component is 10-bit digital data, but in order to eliminate the influence of noise in the input signal, the lower 8 bits are masked and only the upper 2 bits are filtered. Like to do.

  In the above description, in the present embodiment, it has been understood about the setting of the comparison point between the frame images and the filtering as the method of calculating the comparison data at this comparison point. Explain how you went.

  This explanation is made using the functional block diagram of the third screen motion detection unit (46 in FIG. 13) shown in FIG. 17 and the flowchart showing the processing in this functional block shown in FIG. 18 in time series. To do.

  As shown in FIG. 17, the third screen image data input to the third screen motion detection unit (46 in FIG. 13) is stored in the memory in units of frames. Of these frame images, the first field image of the odd frame image is stored in the first frame memory 54a, and the first field image of the even frame image is stored in the second frame memory 54b. Are sequentially stored in the third frame memory 54c, and the second field image of the even frame image is sequentially stored in the fourth frame memory 54d.

  In this state, the comparison point setting means 55 divides the video data in a grid pattern for each field video unit described above, and sets the comparison points at the grid points.

  Next, at the above-mentioned comparison points, a filtered comparison value is calculated, and the comparison is performed by the first comparison unit 56a that compares odd frames and the second comparison unit 56b that compares even frames, Next, based on the result of the comparison means, the determination means 57 is configured to determine whether the continuous field video is a still image or a moving image.

  In the functional block configuration shown in FIG. 17, time series processing will be described with reference to the flowchart of FIG.

  In the first step S1, the comparison point of the field image is set by the comparison point setting means (55 in FIG. 17). In this embodiment, the field image is divided into 8 parts in the horizontal direction and the vertical direction, respectively, and divided into 8 * 8 grids, and each grid point has 8 comparison values. It will be compared at the comparison point.

  In this way, by setting the number of field video divisions and the number of comparison points to be 2 to the power of n, digital design in bit units becomes easy, so the processing and circuit scale are simplified. It will be possible.

  Next, in the second step S2, in the first comparison means 56a for comparing odd frames or the second comparison means 56b for comparing even frames, the above-mentioned 512 of one frame video is compared. Each comparison point is compared, and it is determined whether or not the comparison result is larger than a predetermined value (four points in the present embodiment). If the comparison result is larger than the predetermined value, the compared frame images It is determined that each other is a moving image.

  Next, in the third step S3, the determination means (57 in FIG. 17) determines that the two consecutive frame images compared based on the determination are moving images, and the determination means (in FIG. 17). 57) counts up one moving image determination counter and clears the still image determination counter.

  Next, in the fourth step S4, the determination means (57 in FIG. 17) checks whether or not the above-mentioned moving image determination counter is larger than a predetermined value. It is determined that the video is a movie.

  Next, regarding the determination of whether or not it is a still image, in the second step S2 described above, the determination means (57 in FIG. 17) indicates that the comparison result is a predetermined value (in this embodiment, at the comparison point 512). 4 points) In the following cases, in the fifth step, the determination means (57 in FIG. 17) determines, based on the determination, that the two consecutive frame images compared are still images. The still image determination counter included in the means (57 in FIG. 17) is incremented by 1, and the moving image determination counter is cleared.

  Next, in the sixth step S6, the determination means (57 in FIG. 17) checks whether or not the above-described still image determination counter is larger than a predetermined value. It is determined that the image is a still image.

  In the present embodiment, regarding the determination criterion of still image or moving image, when there is a predetermined difference or more between the four field video data for the field-by-field comparison point, it is determined that the image is a moving image. This compares two consecutive frames of video.

  That is, since one frame of video data is composed of two field video data, if a difference of a predetermined value or more occurs in the frame video twice consecutively, it is determined that these frame videos are moving images. It will be done.

  As for the determination of the moving image, the retry determination in the seventh step S7 is performed in order to prevent erroneous determination.

  Regarding the retry determination, first, when it is determined once as a moving image, the above-described grid points are offset by a predetermined number of pixels in the horizontal direction, and the comparison points are offset and shifted. The same determination after S1 is performed again for the point. As a result of this re-determination, when it is determined that the image is a still image, it is determined as a final still image.

  As described above, according to the embodiment of the present invention, as the processing for detecting the motion between frames of the video signal, the data to be compared is reduced by setting the data to be compared as points, that is, discretely. The load can be reduced by simplifying the process.

  Therefore, for example, in a medical video display device, as in the present embodiment, the video of an endoscope, which is a surgical screen, is displayed on two main screens, and a still image before surgery is used as a sub auxiliary screen. In the case of projecting video and moving images, the motion detection processing as described above can be performed to simplify the processing of the video signal to be projected on the auxiliary third screen, thereby reducing the overall video processing load. This is extremely effective.

  As described above, the present invention provides a main body case, an input terminal provided in the main body case, an input section that takes in a video signal input from the input terminal, and an image between frames of the video signal from the input section. A display unit for generating a display image based on a determination result of the motion detection unit, including a motion detection unit that compares the data and determines whether the video is a still image or a moving image; A display unit that displays a display image from the image generation unit, and the motion detection unit includes a comparison point setting unit for comparing video data between frames of the video signal, and a comparison unit that compares the video data at the comparison point. Since the determination unit determines whether the video is a still image or a moving image from the result of the comparison unit, the processing can be simplified and the load can be reduced.

  That is, in the present invention, as processing for detecting motion between frames of a video signal, by setting data to be compared as points, the amount of data to be compared is reduced, and the load is reduced by simplifying the processing. It can be reduced.

  Therefore, the medical video display apparatus is extremely effective when performing motion detection processing for each of a plurality of different input video signals and simultaneously displaying them on a plurality of display screens.

  Therefore, for example, it is expected to be widely used as a medical video display device.

DESCRIPTION OF SYMBOLS 1 Operating table 2 Patient 3, 4 Doctor 5, 6 Endoscopic camera 7, 8 Video display apparatus 9 Main body case 10 Display part 11 Separate / composite video terminal 12 Component video terminal 13 RGB terminal 14 SDI terminal (serial digital interface) )
15 DVI terminal (digital visual interface)
DESCRIPTION OF SYMBOLS 16 Input part 17 Image signal conversion part 18 Display image generation part 19 Operation part 20 SDI receiver 21 SDI receiver 22 Image signal A / D conversion processor 23 Synchronous reset part 24 Asynchronous FIFO part 25 Synchronous reset part 26 Asynchronous FIFO part 27 Synchronous resetting unit 28 Asynchronous FIFO unit 29 First screen input selection unit 30 Second screen input selection unit 31 Image data bus expansion unit 32 Write control unit 33 First screen line memory 34 First screen line memory 35 Line memory control unit 36 Second screen line memory 37 Second screen line memory 38 Image forming unit 39 Frame memory 40 Image quality processing unit 41 Differential signal conversion unit 42 Clock generator 43 First and second screen motion detection unit 44 Memory Controller 45 Frame rate converter 46 3rd screen motion detection Output 47 Two consecutive frames N video data 47
48 frames (N + 1) video data 49 field video data (horizontal 1920 pixels, vertical 540 pixels)
50 lattice points 51 pixel group 51a first pixel group 51b second pixel group 51c third pixel group 51d fourth pixel group 51e fifth pixel group 51f sixth pixel group 51g seventh pixel group 51h first 8 pixel sets 54a First frame memory 54b Second frame memory 54c Third frame memory 54d Fourth frame memory 55 Comparison point setting means 56a First comparison means 56b Second comparison means 57 Determination means

Claims (7)

Compare the video data between frames of the main body case, the input terminal provided in the main body case, the input section for capturing the video signal input from the input terminal, and the video signal from the input section. A motion detection unit that determines whether the image is a still image or a moving image, a display image generation unit that generates a display image based on a determination result of the motion detection unit, and a display image from the display image generation unit A display unit,
The motion detection means includes
Divide the vertical and horizontal pixels of the field video composing the frame video signal of the video data to be compared into a grid pattern with a predetermined number of divisions, and use the pixel group including the pixels in these grids as the comparison point. possess comparing means for comparing, determining means for determining a moving or image is a still image from the result of the comparison means, and
If the result of the first comparison means is a moving image, the comparison point of the video data between frames of the video input signal is offset by a predetermined number of pixels in the horizontal direction, and the comparison point is updated.
A video display device configured. The video display device according to claim 1 , wherein the comparison point is composed of a pixel group of 2 n powers. The pixel group, the image display device according to claim 1 or 2 consists of 2 n number of pixels. The number of comparison points, image display device according to claim 1 which is a 2 n to any one of the three. The number of divisions, the image display device according division number becomes 2 n and the claims 1 to any one of the four. Wherein the input unit, a video display device according to claim 1 which is configured to input a plurality of video signals to one of the 5. Wherein the display unit, the image display device according to any one of claims 1 was configured to display a plurality of display screens 6.

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