JP3001100B2 - Multi-screen display device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-screen display device used for displaying, for example, a reproduced image of an electronic still camera on a multi-screen.

[Related Art] In recent years, an electronic still camera using an SVF (still video floppy) having the same structure as a floppy disk as a recording medium has appeared. This type of camera captures a still image of a subject, for example, and records the still image on a recording track formed concentrically at equal intervals on the SVF,
The object image can be reproduced by reproducing the image later and displaying the image on a monitor device. here,
In general, a maximum of 50 recording tracks are formed on one SVF, and an image for one field is recorded on each of these recording tracks. Therefore, for example, in the case of the field recording mode in which one image composes one field, up to 50 frames of still images can be recorded in one SVF, and in the frame recording mode in which one image composes two fields. In some cases, up to 25 per SVF
Still images of frames can be recorded.

By the way, the reproduction system of such an electronic still camera is conventionally configured as follows, for example. FIG. 6 is a block diagram showing the circuit configuration. In the figure, when a track number for which reproduction of the SVF 11 is desired is designated by the system controller 10, the head access means 12 operates to move the magnetic head 11a to the corresponding position. As a result, the magnetic head 11a moves to the designated track. The recorded image signal is read and supplied to the head amplifier 13. Then, the image signal amplified by the head amplifier 13 is separated into a luminance signal Y and a color difference signal C by a Y / C separation circuit (not shown), and then processed separately.
That is, the luminance signal Y and the color difference signal C are first FM-demodulated by the demodulation circuits 14a and 14b, and then converted into digital signals by the A / D converters 15a and 15b.
After the signal waveforms are processed by a and 16b, they are supplied to field memories 18a and 18b via analog switches 17a and 17b. The analog switches 17a and 17b open and close according to a control signal CS1 supplied from the system controller 10, thereby preventing signals from being supplied to the field memories 18a and 18b during a period in which head access is not performed. It is.

The field memories 18a and 18b are each constituted by a volatile memory capable of storing information for one field or one frame, and the luminance is synchronized with each timing signal for writing and reading supplied from the memory timing controller 19. The signal Y and the color difference signal C are stored once and then read out repeatedly. The luminance signal Y and the color difference signal C read from the field memories 18a and 18b are supplied to D / A converters 21a and 21b after passing through the changeover switches 20a and 20b, where they are returned to analog signals. Encoder 22
Supplied to In the encoder 22, the luminance signal Y
An image signal is reproduced from the color difference signal C, and a synchronizing signal, a burst signal, and the like are added to this signal to generate, for example, an NTSC composite color video signal. Then, after this video signal has a character pattern representing a track number generated from a character generator 24 inserted by a character insertion circuit 23, the video signal is supplied to a monitor device (not shown) to be displayed as an image. The character generator 24 generates a character pattern corresponding to the character data CD supplied from the system controller 10 in synchronization with the timing signals VS and HS supplied from the memory timing controller 19. The changeover switches 20a and 20b are connected to the signals output from the process circuits 16a and 16b and the filled memory 18 according to the changeover control signal CS2 generated from the system controller.
a and 18b are selectively selected and output to the D / A converters 21a and 21b.

On the other hand, an operation panel 25 has a play button for reproduction operation on the panel surface, for example, as shown in FIG.
31, a stop button 32 and a start button 33 are provided respectively, and a display button for selecting whether or not to display a track number for setting a display mode of a reproduced image.
34, a multi-screen display button 35 for performing a multi-screen display described later, a multi-select button 36 for selecting the number of frames of the multi-screen, and a step button 37 for stepping the track are provided. . Further, as to those relating to image recording, a recording mode selection button 38, a recording button 39, an erasing button 40, and an all erasing button 41 for switching and selecting between a field recording mode and a frame recording mode are provided, respectively. Light emitting diodes 42a, 42b, 43, 44, and 45 for displaying the selected contents are arranged opposite to each of the buttons.
Reference numeral 46 denotes a power button, 47 denotes a display for displaying a track number, 48 denotes an entrance of the SVF 11, and 49 denotes an eject button.

By the way, some of such electronic still cameras have a multi-screen display mode as one of the image display modes. In the multi-screen display mode, recorded images of a plurality of tracks are simultaneously displayed on the same monitor screen. For example, when the number of frames of the multi-screen is set to 3 × 3, FIG. As shown, the images of tracks 1 to 9 are simultaneously displayed on the monitor screen. Similarly, when the number of frames is 5.times.5, the images of track 1 to track 25 are simultaneously displayed on the monitor screen as shown in FIG. 8 (b).

[Problems to be Solved by the Invention] However, the conventional system for performing such multi-screen display is a multi-screen display button 35 on the operation panel.
Is operated, the image of track 1 is always displayed first, and the images of a plurality of tracks are displayed in order. Therefore, an arbitrary plurality of tracks located in the middle of all tracks, for example, tracks 23 to 35
Even if you want to see the images of these desired tracks 23
The image of the track 35 is divided and displayed on two multi-screens as shown in FIGS. 9 (a) and 9 (b). Therefore, for example, the images of the tracks 23 to 35 are simultaneously displayed and compared. Could not.

Accordingly, it is an object of the present invention to provide a multi-screen display device capable of performing multi-screen display from a desired track and thereby efficiently and easily comparing a plurality of track images.

[Means for Solving the Problems] In order to solve the problems and achieve the objects, the multi-screen display device of the present invention is configured as follows.

The multi-screen display device of the present invention includes: a unit for displaying a predetermined number of multi-screen images on a monitor of image information recorded on a recording medium; and a unit for switching the number of frames displayed on the multi-screen. In the state where the multi-screen is displayed, one of the respective screens is selected to display the entire image, and when an operation for performing an additional multi-screen display is performed, the selected image is displayed. Means for displaying a series of images starting from the screen on the monitor as a multi-screen display of the predetermined number of frames on a monitor.

[Operation] By taking such a means, the following operation is produced. That is, when an image of an arbitrary track is selected, the image is displayed on the entire screen, and an operation for displaying a multi-screen is performed, the images of a plurality of tracks are multi-started with the selected arbitrary track at the top. It will be displayed on the screen. Therefore, multi-screen display can be performed in order from a desired track. For this reason, it is possible to simultaneously display images of a plurality of tracks located in the middle of all tracks on one multi-screen without displaying them as different multi-screens. This makes it possible to compare images of a plurality of tracks easily and reliably. In addition, since means for switching the number of frames displayed on the multi-screen are provided, the size of the multi-screen is determined by the type of image to be observed and the purpose (required display image resolution, etc.). May be arbitrarily selected and set. Therefore, the above-described effects are further emphasized, and the comparison of images of a plurality of tracks can be performed more efficiently and accurately.

Example Next, an example of the present invention will be described. FIG. 1 shows the main configuration of an electronic still camera employing the multi-screen display system in the embodiment, and the same parts as those in FIG. 6 are denoted by the same reference numerals.

The system controller 100 includes a system controller main body 101 that performs various controls related to recording, reproduction, display, and the like of an image, a track number memory 102 that stores a track number corresponding to a current head position, and a multi-screen display control. Means 103. When the multi-screen display button 35 on the operation panel 25 is operated, the multi-screen display control means 103
, The track number corresponding to the current head position is read out, image information is read out from each track of the SVF 11 with this track as the head, and the monitor device performs multi-screen display.

Next, the operation of the device configured as described above will be described according to the control procedure of the system controller 100. When the power is turned on, the system controller 100 first resets the state in the controller and each part of the device in step 2a as shown in FIG. And in step 2b
After monitoring the insertion of the SVF11 and inserting and setting the SVF11 into the apparatus from the disk entrance, the process proceeds to step 2c where the recording state of all the tracks of the SVF11, that is, whether the video signal is recorded or not is determined. After the detection operation is completed, the head 11a is returned to the position of the track 1 in step 2d, and then the rotation of the SVF 11 is stopped to enter the standby mode. The monitor display image at this time is a mute screen as shown in FIG. The mute screen selectively outputs a signal generated from, for example, a monochromatic signal generating unit (not shown) to the field memories 18a and 18b or the D / A
It can be obtained by supplying to converters 21a and 21b.

In this standby mode, the system controller 100
, The operation monitoring of the multi button 35, the reproduction button 31, the recording button 38, etc. is repeatedly performed in steps 2e, 2f, 2g,. Then, for example, if the multi-button 35 is operated to view all the images recorded in the SVF 11, the system controller 100 detects this operation in step 2e, and thereafter shifts to multi-screen processing.

FIG. 3 shows the processing procedure. In step 3a, the system controller 100 first determines whether or not a multi-screen is being displayed, and if not, proceeds to step 3c, where the monitor is performed in accordance with the multi-select data. Display the multi-screen pattern on the device. For example, if the multi-select data is 5 × 5, the display pattern of the 5 × 5 multi-screen is displayed on the screen of the monitor device. Then, when this multi-screen is displayed, the value obtained by adding the number of frames of the multi-screen (5 × 5 = 25) to the current track number in step 3d is used as the multi-screen display control means 10.
3 is set in the built-in counter memory. In this state, the process proceeds to step 3e, where the image signal of the current track number is read from the SVF 11. That is, since the position of the head 11a is set to the track 1 in step 2d, the image signal of the track 1 is read from the SVF 11 at this time. Then, the image signal is converted into a region corresponding to a predetermined region of the multi-screen in the field memories 18a and 18b according to the sampling signal corresponding to the compression ratio of the multi-screen from the memory timing controller 19 controlled by the multi-screen display control means 103. After the data is compressed and stored to a size of 1/25, the switches 20a and 20b are switched to the L side by the switching signal CS2 from the system controller main body 101, and then the readout supplied from the system controller main body 101 to the memory timing controller 19 is performed. The data is read from the field memories 18a and 18b based on the control signal. Then, it is displayed in a predetermined corresponding area on the multi-screen of the monitor device. In this case, the image corresponding to track 1 is displayed in the upper leftmost area on the multi-screen. When the image display of one frame is completed, the head 11a is moved to the next track, and the head 11a is moved in the same manner as described above.
The image signals read out from the field memories 18a, 18b
After the data is compressed and stored in a predetermined area, the data is read out and displayed in a predetermined corresponding area on the multi-screen of the monitor device. Then, in step 3f, the track number in the track number memory 102 is incremented, and thereafter, in step 3g
Then, it is determined whether or not the track number of the track number memory 102 has reached the set value of the counter memory. If not reached, the process returns to the step 3e to repeat the above-described reproduction display control, and repeats this control until the track number of the track number memory 102 reaches the set value of the counter memory. Thus, the fourth on the monitor screen
As shown in FIG. 8B, images of tracks 1 to 25 are displayed on a multi-screen. During this multi-screen display,
The position of the head 11a is returned to the position of track 1, which is the first track, and a signal corresponding to the position of track 1 is generated from the character generator 24 according to an instruction from the system controller main body 101, and further passed through the character insertion circuit 23 to the monitor device. Is supplied to the multi-screen, for example, the fourth
This is displayed by blinking the track number as shown in FIG.

When the multi button 35 of the operation panel 25 is pressed again in this state, since the multi screen is already displayed on the monitor device, the system controller 100 proceeds to step 3.
The process shifts from step a to step 3b, in which control for displaying the next multi-screen is executed. The control in this case is also performed after the head 11a moves to the track position 26 corresponding to the first screen of the next multi-screen.
This is performed in substantially the same manner as in steps 3d to 3g. Accordingly, for example, as shown in FIG.
The image of the track 50 is displayed on a multi-screen.

On the other hand, during the display of the multi-screen, after selecting an image of a desired track by the step button 37, the play button 31 is selected.
When the button is pressed, the system controller 100 detects this in step 2f of FIG. 2 and thereafter executes the reproducing process. That is, a drive instruction is output to the head access means 12 and the head 11a is moved to the track selected by the step button 37.
And outputs an instruction to the memory timing controller 19 to display one screen. Then, the image signal recorded on the track selected by the step button 37 is read and temporarily stored in the field memories 18a and 18b, and thereafter is repeatedly read out from the field memories 18a and 18b and transmitted to the monitor device. The image of the track is entirely displayed on the monitor device. For example, if the track 8 is selected as shown in FIG. 5A during the multi-screen display, the image of this track is displayed on the entire monitor device as shown in FIG. 5B.

Now, assuming that the multi button 35 is operated in a state where the image of the desired track 8 is fully displayed, the system controller 100 detects this in step 2e, shifts to multi-screen processing, and then in step 3d, The number of frames of the multi-screen is 25 on track 8 which is the track number of
Is added and set in the counter memory. Then, multi-screen display control is executed in steps 3e to 3g. Then, SVF11 is the above track 8
5C, the monitor device starts with the image of the track 8 as shown in FIG. 5C and follows the tracks 9, 10, and 1 according to the procedure already described.
A total of 25 images of 1, ..., 32 are displayed on the multi-screen.

As described above, according to the present embodiment, an image of a desired track is selected during multi-screen display, and this image is displayed on the entire screen. By pressing the multi button 35 in this state, the track of the image being displayed on the entire screen is displayed. Since multi-screen display can be performed as the top, all tracks 01 to 50 of SVF11
It is possible to selectively display a desired track group image in the multi-screen. Therefore, the images of tracks 23 to 35, which had to be divided and displayed on two multi-screens as shown in FIG. 9 conventionally, can now be displayed on one multi-screen. The images of the tracks 23 to 35 can be simultaneously compared on the same screen, which is very convenient.

The present invention is not limited to the above embodiment.
For example, in the above-described embodiment, the case where the size of the multi-screen is 5 × 5 has been described as an example, but 4 × 4, 3 × 3, 2 × 2
The same can be applied to the case of (1). Further, in the above embodiment, the multi-screen display starting from the image of this track is performed by pressing the multi-button in a state where the image of the desired track is entirely displayed. By selecting a track image and pressing the multi-button 35 in this state, a multi-screen display with the desired track at the top may be performed.
In addition, the control procedure and control contents of the multi-screen display can be variously modified and implemented without departing from the gist of the present invention. It goes without saying that the image information may include not only a television image signal but also data information on an image.

According to the present invention, it is possible to provide a multi-screen display device having the following functions and effects.

a. In the present invention, when one of the respective screens is selected in the state where the multi-screen is displayed, the image is displayed on the entire screen, and when an operation for performing the additional multi-screen display is performed, And means for displaying a series of images starting from the selected screen as a multi-screen display of the predetermined number of frames on a monitor.

Therefore, according to the present invention, it is possible to simultaneously display images of a plurality of tracks located in the middle of all tracks on one multi-screen without displaying them as different multi-screens. Image comparison and the like can be performed efficiently and simply and reliably.

b. The present invention includes means for switching the number of frames displayed on the multi-screen.

Therefore, according to the present invention, the size of the multi-screen is
The size can be arbitrarily selected and set according to the type and purpose of the image to be observed (required resolution of the display image and the like). Therefore, the above-described effects are further emphasized, and the comparison of images of a plurality of tracks can be performed more efficiently and accurately.

[Brief description of the drawings]

1 to 5 are diagrams for explaining a multi-screen display system according to an embodiment of the present invention. FIG. 1 is a functional block diagram showing a main part configuration of an electronic still camera employing the system. 2 and 3 are flowcharts showing the control procedure and control contents of the system controller.
4 and 5 are diagrams showing an example of a display state on the monitor device, FIG. 6 is a circuit block diagram showing an example of a configuration of a reproduction system of the electronic still camera, and FIG. 7 is a diagram of an operation panel of the electronic still camera. FIG. 8 is a diagram showing an example of a configuration, FIG. 8 is a diagram showing an example of a multi-screen display, and FIG. 9 is a diagram showing an example of a display state by a conventional multi-screen display system. 11 ... magnetic disk (SVF), 11a ... head, 100 ...
System controller, 101: System controller main body, 102: Track number memory, 103: Multi-screen display control means.

Claims (1)

(57) [Claims] 1. A means for displaying, on a monitor, image information recorded on a recording medium on a monitor by a predetermined number of frames, a means for switching the number of frames displayed on the multi-screen, and the multi-screen When one of the screens is selected in the displayed state, the image is displayed on the entire screen, and when an operation for performing an additional multi-screen display is performed,
Means for displaying, on a monitor, a series of images starting from the selected screen as a multi-screen display of the predetermined number of frames, the multi-screen display device comprising: