JP2997784B2 - Image display system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an image display system, and more particularly, to an image display system having two multi-screen projection modes of a still image (still image) and a moving image.

[Prior Art] Conventional image display systems include those for still pictures and those for moving pictures. First, a multi-screen projection device for still pictures uses a still playback signal from an electronic still camera or the like as a source. Used. The display operation is performed so that the still image recorded for each track of the magnetic recording medium is sequentially displayed on the multi-screen every time the "frame advance" of the keyboard is pressed. However, it is only for still images and cannot be applied to moving images.

On the other hand, a conventional multi-screen projection device for moving images uses a moving image reproduction signal such as a VTR (Video Tape Recorder) as a source of a video signal. Then, the images are sequentially projected as still images. This operation will be described in more detail. In the example of the four-division multi display, as shown in FIG.
First, video by the video signal is displayed on the A ₁ portion of predetermined section (see Video 48a of FIG. 1 (B)). Next, a "memory" key is pressed in order to freeze and display the moving image in the section for the purpose of confirmation (hereinafter, referred to as a freeze operation).
Then, a frozen still image such as the screen 48b of FIG. 1B is displayed. Then, when pressing the "frame advance" key to change the order Utsude screen, split screen video playback displayed on the A ₂ of the next section is made (see screen 48c of FIG. 1 (B)).

When applying this Utsude apparatus movies out operation for still-picture first displays a still picture in a predetermined compartment A ₁ parts (8
See screen 48f in the figure). Then, press the "memory" key for the above moving image display and the fixed display a still picture of the compartment A ₁ parts as well. In this case, the display screen does not change (see screen 48g in FIG. 8). Furthermore, [the section A ₂ parts followed by pressing the frame advance "key has been necessary to display the still picture (reference picture 48h of Figure 8).

As described above, in the case of sharing a moving image of a conventional image display system as a still image, the moving image of a video tape recorder or the like is targeted. Also in this case, it is necessary to press the "memory" key for the freeze operation and the "frame advance" key for sequentially switching the display section each time the projection section is switched. It should be noted that there is no conventional image display system that can be used for both still images and moving images.

[Problems to be Solved by the Invention] As described above, when the conventional image display system for displaying a moving image is used in the still image multi-projection mode to sequentially display still images, Two keys, "memory" and "frame advance", must be operated.
However, if the still image projection mode is already specified as the mode in advance, the operation of the “memory” key for confirming and displaying the moving image as a still image by a freeze operation in the corresponding section is originally performed only for the still image. It is a useless operation that is not required in some cases.

An object of the present invention is to automatically set a still image projection mode and a moving image projection mode in an image display system in order to solve the above-described problems, and then sequentially display each multi-screen in a corresponding section. In this manner, the operator can easily execute the multi-screen processing in any mode, and particularly to provide an image display system that can efficiently execute the multi-screen display by eliminating unnecessary key operations in the still image projection mode. is there.

[Means for Solving the Problems and Action] The image display system according to the present invention provides a still multi-screen in which a still image is projected on each of the divided areas of the multi-screen and each of the divided areas is filled with the projected still image. A first multi-screen projection unit for realizing a first multi-screen projection mode in which display is performed; and a moving image is projected in a specific section area set at the time out of each section area of the multi-screen. And a second multi-screen projection mode in which a step of switching and selecting a still image projected in another predetermined divided area and a step of continuously projecting the still image are set. The second multi-screen projection mode and the first multi-screen projection mode or the second multi-screen projection mode in accordance with an external input signal, and according to the discrimination result. And discrimination selection means for causing any one of the first multi-screen projection means and the second multi-screen projection means to be in an operating state, wherein the second multi-screen projection means is provided. The projecting means includes means for projecting a moving image to be freeze-recorded by the next-stage freeze operation in a specific section area set at the time, and the discrimination selection The means includes a detecting unit for automatically performing the discrimination based on the state of the external input signal.

Hereinafter, the present invention will be described with reference to the illustrated embodiments.

FIG. 2 is a block diagram showing an image display system according to an embodiment of the present invention. In the system of this embodiment, a still image is sequentially projected in a predetermined order on each divided area of the multi-screen, and the still multi-screen display is performed so that each divided area is filled with the sequentially projected still image. The first multi-screen projection mode to be performed is a still-image multi-screen projection mode, and a moving image is projected in a specific division area set at the time among the division areas of the multi-screen, A second multi-screen projection mode, which is a second multi-screen projection mode, in which a step of switching and selecting a still image projected in another predetermined partitioned area and a step of continuously projecting the still image are set. There are two modes, an exit mode. The selection between the two modes is made based on the presence or absence of an external video signal detection output. And it is a system which displays a screen according to the mode.

In FIG. 2, a magnetic head 12 for transmitting and receiving information to and from a floppy disk 10 as an information recording medium loaded in the present system is provided. An annular recording track is formed concentrically on a recording surface, which is a recording area of the floppy disk 10. The magnetic head 12 is moved in the radial direction of the floppy disk 10 by a head access mechanism (not shown) and moves relative to a target track. To exchange information. A preamplifier 14 for amplifying a reproduction signal from the magnetic head 12 and a preamplifier 16 for amplifying a recording signal to the magnetic head 12 are provided, respectively.
Are selectively connected to the magnetic head 12 by a changeover switch 18. An FM demodulation / signal separation circuit 20 is connected to an output line of the preamplifier 14. This FM demodulation / signal separation circuit 20 demodulates the reproduced FM signal and
The signal is separated into a signal (in this example, a luminance signal and a synchronization signal), a C signal (in this example, an RY / BY color difference line-sequential signal), and a data signal. The Y, C signal output side of the FM demodulation / signal separation circuit 20 is connected to the CY terminal and the CC terminal of the video signal selector 49. Similarly, Y and C signals, which are video signals of a moving image such as an external VTR (video tape recorder) 50, are input to the EY and EC terminals of the selector 49 in the same manner.

The Y / C signal output side of the selector 49 has an A / D conversion circuit 2 for converting the Y signal and the C signal into digital signals.
2 is connected. The Y signal and the C signal converted into digital signals by the circuit 22 are connected to a switch circuit 24.
To the field memory 26 via the The field memory 26 can record one field image information recorded on one recording track of the floppy disk 10 described above. Each digital Y signal and C signal read from the field memory 26 are input to the corresponding D / A conversion circuits 28 and 30 in the order described above.

The Y and C signals output from the D / A conversion circuits 28 and 30 are output to a television monitor 48, and an image recorded in the field memory 26 is displayed. The output lines of the D / A conversion circuits 28 and 30 are also connected to the input side of the signal synthesis / FM modulation circuit 34 via the switch circuit 32. The signal synthesizing / FM modulation circuit 34 synthesizes each of the analog Y signal and C signal output from the D / A conversion circuits 28 and 30 to form a composite video signal, which is FM-modulated and output. This FM modulation output is supplied to the mixer 35. The output of the mixer 35 or the erasure signal output from the erasure signal generation circuit 36 provided separately is switched by the changeover switch 38.
It is connected so as to be selectively input to the above-described preamplifier 16.

On the other hand, the reproduction signal output of the preamplifier 14 is also supplied to an empty track detection circuit 40. The empty track detection circuit 40 uses a discrimination signal indicating whether the track being accessed by the magnetic head 12 is unrecorded or recorded as an input signal to the system controller 42 based on the envelope level of the reproduction signal output of the preamplifier 14. give.

The presence or absence of the Y and C signals of the external video signal is detected by a signal detector 51, and the system controller 42
Is input to Then, based on this signal, one of the above-described still image and moving image multi-screen projection mode is discriminated.

The system controller 42 is configured to include a microprocessor, and provides a control signal to each of the above-described switch circuits and each of the signal processing circuits to perform overall control of the present system. In FIG. 2, signal lines for this purpose are omitted. Furthermore, this system controller
An operation signal from a keyboard 44 for the user to operate the system is also input to 42.
An address signal is issued to the field memory 26 to provide a control signal to an address generator 46 for accessing the memory.

In this system, a signal line for inputting the data signal separated by the FM demodulation / signal separation circuit 20 to the system controller 42 and a system controller
A signal line is provided for supplying the mixer 35 with a data signal temporarily stored in the memory 42 and subjected to a required correction or change by an operation from the keyboard 44. Further, the system controller 42 has built-in projection means in the above two multi-screen projection modes.
A means for selecting based on the discrimination data of the projection mode is also provided. In addition, an address generator 46 and a field memory 26 are used as projection means in each mode.

The operation of the system configured as described above according to the present embodiment will be described with reference to a flowchart and a display state diagram of a screen.

In this system, when an instruction for multi-screen display is given by the keyboard 44, a main routine (not shown)
Causes the subroutine of the multi-screen display process shown in FIG. 4 to be called. Prior to this, the subroutine for setting the projection mode setting flag shown in FIG. 3 is called. First, in step S11, a discrimination is made as to which of the projection mode of the still image and the moving image is to be set. This is determined based on the presence or absence of the output of the detector 51 that detects an external video signal of the moving image. . That is, when there is no signal, the process proceeds to step S12, and the flag a is set to 1 in order to select the multi-screen projection mode of the still image. On the other hand, if there is a signal, the process jumps to step S13 because the video signal of the moving image is input, and resets the flag a to 0 to select the multi-screen projection mode of the moving image. The flag a is set as described above, and the routine returns from the present routine to the main routine.

Subsequently, the subroutine of the multi-screen display process of FIG. 4 is called. Then, in step S15, which is a discrimination selecting means for causing the first and second mode processes to be activated based on the discrimination result of the external video signal, referring to the value of the flag a and setting a = 1 , Step
Proceeding to S16, the still image multi-screen projection processing subroutine, which is the first multi-screen projection means, is called. On the other hand, if a = 0, the process jumps to step S17 to call the moving image multi-screen projection processing subroutine, which is the second multi-screen projection means.

When the subroutine of the still image multi-screen projection process (see FIG. 5) is called in step S16, first, in step S21, the multi-screen mode setting for setting the number of divisions of the multi-screen is performed. Then, based on the number of divisions, the correspondence between the address of the field memory 26 and the address of each divided screen is given by the address generator 46. Subsequently, in step S22, the screen address of the field memory 26 corresponding to the initial projected divided screen is set to 0. Incidentally, the screen address 0 in the divided Upper left A ₁ shown in the display screen of the split screen address FIG. 1 (A), also, the screen A _2, A _3, A respectively screen addresses 1 to _4, Let 3 correspond.

Subsequently, in step S23, the initial projected split screen (A
The video signal of the still image of the designated track on the floppy disk 10 is written to the screen address 0 of the field memory 26 corresponding to ₁ ). And the split screen of the monitor 48
The still picture is issued movies to A ₁ part screen (FIG. 1 (A)
48d).

Next, in step S24, the operation waits for the operation of the key of the keyboard 44, and when the key is pressed, the operation proceeds to step S2.
Check the 5 pressing keys. If the key is other than the "frame advance" key, for example, a "stop" key or the like, the process jumps to step S26, executes the corresponding processing, and exits from this routine. If the key is the "frame advance" key, the process proceeds to step S27.

In step S27, the reproduction track number of the floppy disk 10 is incremented, and in step S28, the address value of the projected divided screen is incremented.
In the above example, the address value is 1 and the projected split screen is A ₂
Becomes Then, the process proceeds to step S29, at which the still picture signal recorded on the incremented reproduction track is written to the incremented address value of the field memory 26, for example, the memory section corresponding to the address 1. Then, the still picture is issued Film split screen A ₂ of the monitor 48 (see screen 48e of FIG. 1 (A)). After that, the process returns to step S24, and a still image is sequentially displayed as divided screens A ₃ , A ₄ , A ₁ ... Every time the “frame feed” key is operated.

On the other hand, when the subroutine (see FIG. 6) of the moving image multi-screen projection process is called in the above-described step S17, first, in the multi-screen mode setting in step S31 and the address setting of the projection divided screen in step S32, the aforementioned The same processing as the still image projection processing subroutine (see FIG. 5) is executed.

Subsequently, in step S33, an external video signal of a moving image such as a VTR 50 is fetched via the selector 49, and the data after A / D conversion is stored in the field memory 26 corresponding to the initial projection divided screen (A ₁ ). Write to the screen address 0 corresponding part. In addition,
This writing operation (the rewriting operation at the time of repetition) is processed in synchronization with the external video signal, and is repeated at an interval of, for example, 1/60 second together with the key operation waiting process of the next step S34. Also, the moving image is issued movies on divided screen A ₁ part of the monitor 48 (see the screen 48a of FIG. 1 (B)). Note that the display state of the split screen in the case of the present moving image projection processing routine is the same as that of the conventional example.

When the key is pressed in the standby state of the operation of the key of the keyboard 44 in the step S34, the key is checked in the step S35. If the pressed key is other than the “memory” key, for example, a “stop” key, etc.
The process jumps to S36, executes the corresponding process, and exits from this routine. If the key is the "memory" key, it is determined that the instruction is a freeze process, and the flow advances to step S35 'to perform the freeze process. In other words, the rewriting process of the field memory 26 is stopped, and the monitor 48 displays FIG. B) Screen 48b
Is displayed as a frozen still image.

Then, the process proceeds to step S37 to be in a key operation standby state again. Here, the operator observes the frozen screen, determines whether or not the frozen screen is available, and performs a predetermined key operation.
That is, if "OK", then "Frame Forward" key,
If "No", press the "Memory" key. In step S38, the pressed key is checked, and if it is the "frame advance" key, the flow advances to step S39 to increment the address value of the next divided screen to be projected. Address values in the above example is 1, the corresponding split screen becomes A ₂ parts. Then, back to the memory write processing in step S33 again, moving is issued movies in split screen A ₂ (see screen 48c of FIG. 1 (B)).

On the other hand, if it is necessary to project the moving image again in the same section and the pressed key is the "memory" key, the process jumps to step S40 in step S38, and further, without changing the screen address value, the memory writing in step S33 is performed. Returned to processing. Then, subsequently Utsude videos to split screen A ₁ (see screen 48a of FIG. 1 (B)). Thereafter, operations such as the above-mentioned freeze processing are repeated.

Also, if the pressed key is not a “memory” key by checking the pressed key in step S40, for example,
If it is a "stop" key or the like, the flow jumps to step S41 to return to the main routine from this routine to perform the corresponding processing.

As described above, according to the image display system of the present embodiment, the setting of the still image projection mode and the moving image projection mode is performed by the external VTR.
And so on.
The operator can immediately start work such as observation.
Further, since the mode is already set as described above and the processing dedicated to each mode is selected, in the still image projection processing, the divided area of the divided screen to be projected as described in the case of the conventional example is used. It is not necessary to press the "memory" key uselessly each time is changed sequentially, thereby enabling efficient operation. Further, in the automatically set moving image projection mode, the freeze operation is performed by the “Memory” key, and after confirming the still image, the divided screen is displayed by the “Frame advance” key, as in the conventional system. It is also possible to change the projection section area.

In the above embodiment, the detection output of the signal detector 51 of the external video signal is used as the data for discriminating the two modes described above.
For discrimination of the video projection mode, the insertion of the external input connector of the video signal into the connector receiver of the main body is detected by a mechanical switch, or an optical or magnetic sensor, and the projection mode is determined based on the output. It has a process of automatically setting a setting flag.

The subroutine of the automatic setting process is shown in FIG. First, in step S51, it is determined whether or not a switch for detecting that the external connector is connected is on. If the switch is on, a video signal of an external moving image is expected to be input. Set the multi-screen projection mode for moving images using video signals. Therefore, the process proceeds to step S52, and the flag a is reset to 0. When the switch is off, the connector is not connected, and it is determined that an external video signal is not input, and the multi-image projection mode for a still image is set. For this purpose, the process jumps to step S53 and sets the flag a to "1". Thereafter, the process returns from the present subroutine to the main routine. The multi-screen display process in this modification is the same process as the subroutine of the above-described embodiment shown in FIG. As a means for discriminating the projection mode selection, it is of course possible to set a value of the projection mode setting flag a by directly inputting a key from the keyboard 44, but manual input is required every time a multi-screen display is performed. . It is also possible to add a mode setting means by key input to the above embodiment.

[Effects of the Invention] As described above, the image display system of the present invention discriminates and selects a multi-screen projection mode for a still image and a multi-screen projection mode for a moving image based on information from an external operation or input. According to the present invention, the operator can quickly execute the multi-screen projection processing in any of the above modes, and further avoid unnecessary key operations in the case of still image projection processing. Thus, an image display system having a remarkable effect can be provided.

[Brief description of the drawings]

FIGS. 1 (A) and 1 (B) show a multi-screen display state by the image display system shown in FIG. 2, respectively. FIG. 1 (A) shows a multi-image projection mode for a still image, and FIG. ) Is a diagram showing a display state of a screen in a multi-screen projection mode of a moving image, FIG. 2 is a block diagram of an image display system showing one embodiment of the present invention, and FIG. 4 is a flowchart of a projection mode setting flag setting subroutine of the image display system of FIG. 4, FIG. 4 is a flowchart of a multi-screen display subroutine of the image display system of FIG. 2, and FIG. 6 is a flowchart of a still image multi-screen projection processing subroutine of the display system, FIG. 6 is a flowchart of a moving image multi-screen projection processing subroutine of the image display system of FIG. 2, and FIG. FIG. 8 is a flow chart of a subroutine for automatically setting the projection mode of the image display system showing a modification of the embodiment shown in FIG. 2, and FIG. 8 shows the conventional image display system for moving images applied to still image display. FIG. 14 is a diagram showing a screen display state in a case. 48a, 48b, 48c: Screens in the multi-screen projection mode for video (second multi-screen projection mode) 48d, 48e: Multi-screen projection mode for still images (first multi-screen projection mode) Screen 26... Field memory (first and second multi-screen projection means) 42... System controller (first and second multi-screen projection means) 46... Address generator (first and second multi-screen projection means) Multi-screen projection means) 44 Keyboard (mode discriminating means) 51 Signal detector (mode discriminating means) 42 System controller (mode discriminating selecting means)

Claims (3)

(57) [Claims] 1. A first multi-screen projection mode in which a still image is projected in each divided area of a multi-screen and a still multi-screen display in which each divided area is filled with the projected still image is realized. A first multi-screen projecting means for displaying a moving image, and displaying a moving image on a specific divided region set at the time among the divided regions of the multi-screen, and displaying the moving image on another predetermined divided region. A second multi-screen projection means for realizing a second multi-screen projection mode in which a step of switching and selecting a still image and a step of continuously projecting the still image are set; The first multi-screen projection mode or the second multi-screen projection mode is discriminated according to the input signal, and the first multi-screen projection means or the second multi-screen projection means or the second multi-screen projection mode is determined according to the discrimination result. Multi-screen projection The image display system characterized by being provided with discriminating selection means for occupying made any stage in operation, the. 2. The second multi-screen projecting means includes means for projecting a moving image to be freeze-recorded by a next-stage freeze operation in a specific section area set at the time. 2. The image display system according to claim 1, wherein: 3. The image display system according to claim 1, wherein said discrimination selecting means includes a detection unit for automatically performing said discrimination based on a state of an external input signal.