JP2971229B2 - TV monitor device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television monitor device, and more particularly to a television monitor device which enlarges a desired portion of a display image displayed on a monitor, and moves the enlarged screen to a desired position on the upper, lower, left and right screens. The present invention relates to a television monitor device capable of displaying an entire reduced screen.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram of a television monitor disclosed in Japanese Patent Application No. 3-77732 filed on Apr. 10, 1991 by the present applicant. This television monitor device moves a desired portion of the monitor screen to the center of the monitor screen by operating a button while projecting a video signal obtained by imaging on the monitor, and enlarges the area ratio to, for example, four times. It is configured so that it can be projected.

In this television monitor device, first, an image of a visitor 2 is taken by a television camera 1, and a video signal AS1
Is output. The video signal AS1 is input to an A / D converter 3 which converts a digital signal for each pixel and outputs a digital video signal DS1, and the digital signal DS1 is stored in a memory 4 by addressing. Next, the digital video signal DS2 read from the memory 4 is input to the D / A converter 5, and its output is converted to an analog signal to output the video signal AS2. The video signal AS2 is input to the monitor 6, and is displayed on the screen according to the input. Memory 4 has a write / read address signal W for writing or reading data for each pixel.
/ R is connected to the terminal a of the switch 7 for giving / R. A write address counter 8 for supplying a write address signal WS to one input terminal b of the switch 7 and a read address counter 9 for supplying a read address signal RS to the other input terminal c of the switch 7 are connected to the address counters 8 and 9. Is connected to an address controller 10 for driving and controlling the counting operation, and the address controller 10 is connected to a timer 11, a setting button 12 operated externally, and a synchronization separation circuit 13. The synchronization separating circuit 13 is connected to the television camera 1, and the A / D converter 3 is connected to the write address counter 8, the read address counter 9 and the terminal a of the switch 7.

The A / D converter 3 samples the supplied video signal AS1 for each pixel in synchronization with a predetermined sampling pulse SP, and outputs a digital video signal DS1. The sampling pulse SP is generated inside the A / D converter 3 and simultaneously supplied to the switch 7 and the write and read address counters 8 and 9 connected to the next stage.

The memory 4 is a digital memory capable of storing a video signal for one field for each pixel. The digital video signal DS1 supplied from the A / D converter 3 is written to the address specified by the write / read address signal W / R supplied from the switch 7, and the write / read is performed.
It operates to read the signal DS1 stored at the address specified by the read address signal W / R and output it as a digital video signal DS2.

The switch 7 has two input terminals b and c.
And one output terminal a. One of the input terminals b
The write address signal W from the write address counter 8
S is applied, and a read address signal RS is applied from the read address counter 9 to the other terminal c. The switch 7 operates in response to the sampling pulse SP such that the signal input side thereof is switched, and a signal supplied to the switched input terminal side is derived to the output side. Therefore, write / read address signal W / R derived from output terminal a of switch 7 is one of write address signal WS and read address signal RS.

[0007] The synchronization separation circuit 13 receives the video signal AS1 output from the television camera 1, extracts only the synchronization signal components such as the horizontal synchronization signal HD and the vertical synchronization signal VD therefrom, and converts the synchronization signal HV into the address controller 10. Output to

The setting button 12 has an instruction button for moving the image up, down, left and right, and operates a desired portion of the image displayed on the screen of the monitor section 6 up, down, left, and right by an external operation. Is moved to the center of the screen, and a setting signal S1 for enlarging and projecting is output.

The address controller 10 outputs a synchronization signal H
V and a setting signal S1 are input to output a write start signal W1, a horizontal read start signal HS, a vertical read start signal VS, and an enlargement mode designation signal ZS.
The timer 11 controls the timing of the address controller 10. The address controller 10 measures the period during which the setting signal S1 is continuously supplied by the timer 11, and adjusts the output timing of the horizontal read start signal HS or the vertical read start signal WS in response to the measured data. Operate. That is, when the synchronization signal HV is applied, the address controller 10 outputs the write start signal W1, the horizontal read start signal HS, and the vertical read start signal VS. Further, when given the synchronization signal HV and the setting signal S1, the address controller 10 outputs the enlargement mode designation signal ZS and outputs the horizontal read start signal HS and the vertical read start signal VS while adjusting the timing. I do.
Details of this signal output will be described later.

When write start signal W1 is applied, write address counter 8 outputs write address signal WS in synchronization with sampling pulse SP. Write address signal WS is applied to input terminal b of switch 7 connected to the next stage. Read address counter 9 outputs read address signal RS in synchronization with sampling pulse SP when vertical read start signal VS, horizontal read start signal HS and enlargement mode designation signal ZS are applied. Read address signal RS is applied to input terminal c of switch 7 connected to the next stage.

In the write address counter 8 and the read address counter 9, the maximum value of the count value is set in advance in relation to the storage capacity of the memory 4. I will not do it. In particular, when the enlargement mode designation signal ZS is given, the read address counter 9 determines whether or not the image enlargement mode of the monitor screen is designated at that time. Although it has a count value output cycle, it operates so that the update speed of the count value is halved. Therefore, the read address signal RS having the same content is output twice consecutively.
The maximum count value in the enlargement mode is also stored in advance.

FIGS. 4A and 4B are diagrams for explaining movement and enlargement of an image by the above-described apparatus. Next, movement and enlargement of the screen on the monitor screen of the television monitor device shown in FIG. 3 will be described with reference to FIG.

If the television camera 1 captures an image of the visitor 2 and the visitor 2 moves to the upper left of the monitor screen of the monitor unit 6 as shown in the left side of FIG. The right button and the down button of the setting button 12 are operated so that the visitor image is displayed at the center of the monitor screen. At this time, the monitor screen of the monitor unit 6 is shown in FIG.
As shown on the left side of (a), the screen moves from the upper left of the set screen to the lower right, and is displayed at the center of the monitor screen enlarged four times, for example, as shown on the right side of the figure. At this time, writing and reading of image data in the memory 4 are performed as follows.

As shown in FIG. 4 (b), the memory 4 has a two-dimensional pixel array, and the pixel array is arranged in m rows and n columns, and has (0,0) to (m-1, It is assumed that an address for the pixel of (n-1) is provided.

When the setting button 12 is not operated and the enlargement of the screen is not designated in this television monitor device, the address controller 10 responds to the input of the synchronization signal HV given through the synchronization separation circuit 13 to And outputs a read start signal W1, a vertical read start signal VS, and a horizontal read start signal HS. The write start signal W1 operates so that the write address counter 8 outputs the write address signal WS in synchronization with the sampling pulse SP. The vertical read start signal VS and the horizontal read start signal HS act to cause the read address counter 9 to output the read address signal RS in synchronization with the sampling pulse SP.

Since the signal input side of the switch 7 is alternately switched in response to the sampling pulse SP,
The write / read address signal W / R derived to the output side includes a write address signal WS and a read address signal RS.
Are alternately included and provided to the memory 4.

The memory 4 stores a digital video signal DS1 for each pixel obtained by sampling in synchronization with the sampling pulse SP in the A / D converter 3 at the preceding stage.
At the address specified by the write address signal WS included in the write / read address signal W / R, and immediately before writing by the read address signal RS included in the signal W / R applied immediately after writing. Said signal DS
1 to read out and derive it as a digital video signal DS2.

The digital video signal DS2 is converted into a video signal AS2 via the D / A converter 5, and is displayed on a monitor screen in the monitor unit 6.

As described above, when enlargement of the object is not desired, writing and reading of data for each pixel in the memory 4 are performed alternately in response to the switching operation of the switch 7, The screen is displayed on the monitor unit 6 while being updated for each field screen.

As described above, for example, when the visitor 2 moves while the screen is being projected, and the visitor 2 is projected on the upper left of the screen as shown in the left side of FIG.
The photographer first operates the setting button 12 so that the image of the visitor 2 is displayed at the center of the monitor screen. At this time, in order to move the upper left visitor image to the center, the image may be moved to the lower right direction, and the photographer operates the right button and the lower button of the setting button 12. In response to the button operation, the setting button 12 outputs a setting signal S1 including a signal indicating a moving direction of the screen and an enlargement.

The setting signal S1 is at the lower left of the same monitor screen,
Any one of the upper left, upper right, and lower right quadrants is displayed in the center of the screen by moving and enlarging (the area ratio is four times) from left to right in FIG. 4A. Suppose that it works. That is, (0, 0) to (m / 2, n) of the digital video signal DS1 of the current image written in the two-dimensional image array of the memory 4 shown in FIG.
/ 2) only the pixel data may be extracted and processed so as to become an enlarged image corresponding to the size (0, 0) to (m-1, n-1). This can be realized by controlling the data read / write operation in the memory 4. Specifically, the setting signal S1 is the address controller 1
0, the address controller 10 determines that the video signal is being captured by the television camera in response to the synchronization signal HV being applied, and further responds to the application of the setting signal S1, FIG. 4A described above.
It is determined that the movement and enlargement of the upper left screen in the lower right direction as shown in FIG.

FIGS. 5A to 5D are diagrams for explaining the timing of the video signal, the scanning signal, and the horizontal readout start signal when the image is enlarged by the above-described television monitor device.

The address controller 10 outputs a synchronization signal H
V, and the blanking area BL and the effective area MU shown in FIG.
Are classified. That is, the address controller 10
Operates to disable the outputs of the write address counter 8 and the read address counter 9 in the blanking area BL, and activates the outputs of the counters 8 and 9 in the effective area MU.
It acts to output the write start signal W1, the vertical read start signal VS, and the horizontal read start signal HS.

When the upper left portion of the monitor screen of the effective area MU in FIG. 5A is to be enlarged at the center of the screen, as shown in FIG. 5B, the video signal AS1 for one horizontal scanning line is required. , A horizontal synchronizing signal HD as shown in FIG. 2C is extracted by the synchronizing separation circuit 13 and is supplied to the address controller 10. The address controller 10 responds to the input of the synchronization signal HV including the setting signal S1 and the signal HD so that the data corresponding to the enlarged memory area MZ in FIG. Then, as shown in FIG. 3D, the horizontal read start signal HS is output so as to exclude the blanking area BL. At this time, although not shown, the vertical readout start signal VS is similarly supplied to the expanded memory area M.
It is output to specify Z. Further, the address controller 10 outputs an enlargement mode designation signal ZS to give a signal to the read address counter 9 to enlarge the upper left image of the current image four times.

As described above, in the horizontal direction, the rising timing of the horizontal reading start signal HS in the horizontal synchronizing signal HD period is variably adjusted based on the setting signal S1 output from the setting button 12. Although not shown,
Similarly, in the vertical direction, the vertical read start signal V
The rising timing of S in the vertical synchronizing signal VD period is variably adjusted based on the setting signal S1.

Now, when the photographer desires to enlarge the upper left image, the address controller 10 is operated as described above.
Outputs a signal, the write address counter 8 responds to the applied write start signal W1 to store the digital video signal DS1 for each pixel in the memory 4 in the same manner as in the above-described normal state.
Acts to write. In parallel, in order to enlarge the upper left image of the current image by a factor of two, the read address counter 9 simultaneously sets (0.0) to (m) of the current image shown in FIG. / 2 to n / 2) is read twice in both the horizontal and vertical directions, and the read address signal RS is output so as to be doubled. The read address counter 9
Are given as (0,
It is assumed that the counting operation is continued up to the count value corresponding to (0) to (m / 2, n / 2).

FIGS. 6A to 6C show the horizontal read start signal HS, the input / output timing of the write / read address signal W / R, and the data read / written to / from the memory at the time of image enlargement in the aforementioned apparatus. FIG. 4 is a diagram for explaining the contents of FIG. In the horizontal direction, when the horizontal read start signal HS rises, the memory 4 switches the switch 7.
Read / write address signal W / R applied through read / write address signal WS and read address signal RS
Are alternately designated, so that writing and reading of the digital video signal DS1 for each pixel are performed alternately. At this time, the read pixel data is successively read twice by the signal RS included in the signal W / R, so that at the time of reading, the image is doubled in the horizontal direction. More specifically, the horizontal read start signal HS shown in FIG.
Is detected, the W address (write address) is changed to 0, 0 → 0, 1 → 0, 2 →, as in the normal case, as shown in FIG. It is given while being incremented. On the other hand, the R address (read address) is set so that the data of the same pixel is read twice.
The same address is given twice consecutively in the order of 0, 0 → 0, 0 → 0, 1 → 0, 2,. Therefore, at this time, the data W (write data) of the memory 4 is synchronized with the write / read address signal W / R as shown in FIG.
.., And the data R (read data) is similarly 0,0 → 0, 0 → 0 in synchronization with the write / read address signal W / R. , 1 → 0, 1... Are read twice consecutively.

As described above, when the screen enlargement is desired, the data of the pixel corresponding to the portion whose enlargement is desired is written into the memory 4 and read twice. Since write / read address signal W / R is output, enlargement of the screen can be easily realized while memory 4 has a memory capacity of one field. Therefore, the video signal obtained by imaging with the television camera 1 is written in the memory 4 in real time, and the image of the portion designated by the setting button 12 is moved to the center of the screen and enlarged. And read out and projected.

The television monitor can also move the enlarged screen in a designated direction while the setting button 12 is continuously operated. This will be described below.

FIG. 7 is a diagram showing a display example of a screen for explaining the continuous movement of the enlarged screen by the above-mentioned device.

FIGS. 8A to 8F are diagrams for explaining the timings of the video signal, the scanning signal, and the horizontal reading start signal when the screen shown in FIG. 7 is continuously moved.

When the setting button 12 is continuously operated, the address controller 10 measures the continuous input period of the setting signal S1 output from the setting button 12 by the timer 11. At this time, if the input is a continuous input for one field period (1/60 second) or longer, the horizontal read start signal HS and the vertical read start signal VS are set to gradually rise at the signal rising timing of the next field. The output is shifted in the direction. Therefore, if the right button of the setting button 12 is continuously operated following the enlargement of the screen of FIG. 4A as described above, as shown in FIG. The frame of the enlarged screen shifts to the right. Therefore, the face of the visitor 2 gradually moves to the left of the monitor screen.

FIGS. 8 (a) to 8 (c) show FIGS.
This corresponds to (c). As shown in FIGS. 3 (c) to 3 (f), the rising of the horizontal read start signal HS
The address controller 10 controls the output so that one horizontal synchronization signal HD gradually appears in the next field direction for each field. Therefore,
The read address counter 9 is the address controller 1
In response to the input of the horizontal read start signal HS given by the output control of 0, the count operation is performed so that the read start address in the memory 4 is gradually shifted for each field. The display screen on the monitor 6 moves and the visitor image enlarged as shown in FIG. 7 gradually shifts to the left for each field.

The movement of the enlarged screen for each field in the right direction can be performed in the same manner. In addition, the movement of the enlarged screen for each field in the upward and downward directions can be realized in the same manner by variably adjusting the rising timing of the vertical reading start signal VS within one vertical synchronization signal VD.

As described above, as the setting button 12 is kept pressed, the screen can be gradually moved in the direction specified by the button operation as shown in FIG. The subject image to be moved can be moved to a desired position on the monitor screen while watching the screen.

[0036]

[SUMMARY OF THE INVENTION According to the aforementioned television monitor device, for imaging on a monitor, on an enlarged scale, a portion of an image obtained by imaging by a television camera, looking at the whole time, the circumferential Ri situation I can't know. In order to know the entire situation, it is necessary to switch to the mode in which the entire screen is displayed once, which is problematic. An object of the present invention is to allow a user to select a part of the entire image projected on a monitor.
Enlarge the enlarged image of the desired subject image and reduce the entire image
Real-time and accurate
It is an object of the present invention to provide a television monitor device which can project images on a television monitor.

[0037]

TV monitor apparatus according to the present invention SUMMARY OF THE INVENTION The inputs an imaging unit, a first image signal obtained by imaging by the imaging means, converts this to a digital signal for each picture element and conversion means you, storage means for storing for each pixel the converted digital signal by the conversion means, first image and the writing and reading of digital signals in the memory means
An access unit that alternates in synchronization with a synchronization signal in a signal, an externally operated designation unit that designates a read portion of a digital signal stored in a storage unit, and an activation in response to designation by the designation unit; so as to display the enlarged screen Shi out more Kaidoku digital signal <br/> No. corresponding to the reading portion and image five-
By thinning a first access control means for controlling the access means, the digital signal stored in the storage means to read the reduced
A second access control means for controlling the access means so as to display a screen, a digital signal read by the access means being converted into an analog signal, and a reduced screen and an enlarged image
Monitor means for monitoring and displaying a second video signal superimposed on the surface .

[0038]

Since the television monitor according to the present invention is constructed as described above, the access means is provided in the storage means.
The writing and reading of the digital signal in the first video signal
It is performed alternately in synchronization with the synchronization signal.
When reading the read signal, the first access control means and the second
It is controlled by the access control means. First access control means, only the signal of the desired portion of the digital signal which is stored in the storage means, and controlling the access means so issued multiple Kaidoku per picture element, and the second access control means is thinned out digital signals being stored by controlling the access means so as to read, the monitor means, an analog to digital signal read in this manner
Monitor display the second image signal obtained by superimposing the reduced image and the enlarged image is converted into a signal.

[0039]

FIG. 1 is a block diagram showing an embodiment of the present invention.

The difference between the television monitor device according to the present invention shown in FIG. 1 and the television monitor device shown in FIG. 3 is that the television monitor device according to the present invention has a reduced read address counter 14 and a read address changeover switch 1.
5 is added. Along with this, the function of the address controller 10 is also expanded, and a reduced period signal SM is output and supplied to the reduced address counter 14. The reduced address counter 14 is provided with a sampling pulse SP from the A / D converter 3. This is a read address changeover switch 1
5 terminal f. Address controller 1
0 is connected to the terminal e of the read address changeover switch 15, and the terminal e is connected to the terminal c of the switch 7.
The read address counter 9 is connected to a terminal d of the read address changeover switch 15. When the terminal e of the read address changeover switch 15 is switched and connected to the terminal d, a circuit similar to that of FIG. 3 is obtained.

The configuration of each of the other circuits and processing units is the same as that of FIG. 3, and their functional operations are also the same as those of FIG. 3, so that detailed description thereof will be omitted.

FIGS. 2A and 2B correspond to FIGS. 4A and 4B. As shown on the left side of FIG. 2 (a), when the visitor 2 at the upper left of the screen is projected off-center, the photographer takes an image of the visitor 2 as shown on the right side of FIG.
Set button 12 so that it appears in the center of the monitor screen.
Operate. At this time, to move the upper left visitor image to the center, the photographer operates the right button and the lower button of the setting button 12 because the image may be moved in the lower right direction. In response to this button operation, the setting button 12 outputs to the address controller 10 a setting signal S1 including a signal indicating the moving direction and enlargement of the image.

The address controller 10 outputs the synchronization signal H
V and the setting signal S1, the write start signal W
1. A vertical read start signal VS, a horizontal read start signal HS, and a reduced period signal SM are output.

The reduction period signal SM is a signal for specifying a period during which the entire image is reduced to the lower right corner and displayed on the monitor as shown on the right side of FIG.

That is, the digital video signal DS1 written in the two-dimensional pixel array of the memory 4 shown in FIG.
Means that the enlarged image portion is continuously read twice as before, for example, the area is enlarged by a factor of 4 and the reduced image is 0,0
The reading operation is performed by thinning out 1/3 from → 0,3 → 0,6 →... And the area ratio is reduced to 1/9.

The reduced read address counter 14 receives the sampling pulse SP when the reduced period signal SM is input.
Starts the counter operation with clock signal 0,0 →
Count up as 0,3 → 0,6 →. The read address switch 15 is normally connected to the read address counter 9 side, but is switched to the reduced read address counter 14 only during the reduction period. as a result,
The read address signal RS of the memory 4 is 0,0 → 0,3 →
0, 6 →..., The pixel data in the memory 4 is thinned out and read, and the entire image is displayed on the monitor 6 with the area ratio reduced to 1/9. The reduced images 0, 0, p, and q at the lower right of the enlarged image in FIG.

[0047]

According to the present invention, the digital data in the storage means is stored.
The writing and reading of the total signal are synchronized with the synchronization signal in the first video signal.
Alternately in synchronization with the
Enlargement of the subject image desired by the user among the body images
An image in which an image and a reduced image obtained by reducing the entire image are superimposed.
Can be projected in real time and accurately. Ma
In addition, image enlargement and reduction are performed using one storage unit.
Simplification of circuit configuration and cost reduction
You.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

FIGS. 2A and 2B are explanatory diagrams of an image operation according to the present invention.

FIG. 3 is a block diagram of an example of a conventionally disclosed device.

FIGS. 4A and 4B are explanatory diagrams of an image operation in the technology disclosed in the related art.

FIGS. 5A to 5D are explanatory diagrams of timings of a video signal, a scanning signal, and a horizontal readout start signal when an image is enlarged according to a technique disclosed in the related art.

FIGS. 6A to 6C are explanatory diagrams of a horizontal read start signal, an input / output timing of a write / read address signal, and data read / written to a memory when an image is enlarged in a conventionally disclosed device. It is.

FIG. 7 is an explanatory diagram of continuous movement of a screen.

8 (a) to 8 (f) are explanatory diagrams of timings of a video signal, a scanning signal, and a horizontal reading start signal when the screen of FIG. 7 is continuously moved.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Television camera 4 Memory 6 Monitor part 7 Switch 8 Write address counter 9 Read address counter 10 Address controller 12 Setting button 13 Synchronization separation circuit 14 Reduction read address counter 15 Read address changeover switch AS1, AS2 Video signal DS1, DS2 Digital video signal ZS Enlargement mode designation signal S1 setting signal HS Horizontal read start signal VS Vertical read start signal WS Write address signal RS Read address signal W / R Write / read address signal W1 Write start signal

Continued on the front page (51) Int.Cl. ⁶ identification symbol FI H04N 7/18 H04N 7/18 (58) Fields investigated (Int.Cl. ⁶ , DB name) H04N 5/262 G09G 5/32 H04N 5 / 44 H04N 5/45 H04N 5/907 H04N 7/18

Claims (1)

(57) [Claims] And 1. A pickup means receives the first image signal obtained by imaging by the imaging means, and conversion means that converts it into a digital signal for each picture element, converted by the converting means before the digital signal
Storage means for storing for each serial pixel, and access means for alternately and writing and reading of said digital signal in said memory means in synchronism with the sync signal in the first video signal, the external operation, wherein designating means for designating a read portion of said stored digital signal in the storage means is activated in response to designation by said designation means, said reading
Thinning the first access control means for controlling the access means so as to display a plurality of times read the expansion screen the digital signal to said picture five-corresponding to the output portion, the digital signal stored in said storage means said second access control means for controlling the Akuyasu means so as to display the read reduced image, the digital signal read with the reduced screens into an analog signal by the access means Te expansion screen
A monitor means for monitoring and displaying a second video signal on which is superimposed .