JPH03114374A - Video magnification display device - Google Patents

Abstract

PURPOSE:To obtain high quality magnified video picture by using a control signal of a controller to start or complete the adjacent vertical scanning operations between receivers consecutive in the vertical scanning direction simultaneously. CONSTITUTION:A controller 3 outputs a control signal to video memories 7a-7d so that a split picture signal stored in one video memory is read in the stored order and a split picture signal stored in other video memory is read in the reverse order of storage sequentially and simultaneously and each video memory stores the split picture signal is a split picture signal adjacent in the vertical scanning direction. Thus, the split picture signal adjacent in the vertical scanning direction and read in the stored order is scanned in the forward direction and the split picture signal read in the reverse storage order is scanned in the reverse direction respectively. Thus, the video image is observed as if it were consecutive between the upper and lower receivers.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an image enlargement display device, and in detail,
The present invention relates to a video enlargement display device that inputs a video signal, obtains a plurality of divided screens made up of the screen portions of the video signal, and enlarges and displays the screen of one video signal on the plurality of screens.

(Prior Art) Conventionally, in order to enlarge and display one video signal using a plurality of receivers, the image signal of the digitalized video signal corresponding to the position of each receiver at the time of enlarged display is made compatible with six receivers. The digitized image signals stored therein were then converted into analog signals and displayed simultaneously on corresponding television receivers.

Below, based on Figures 6 to 8, the horizontal scanning direction (X)
A conventional example of an image enlargement display device that displays an image twice in both the vertical scanning direction (Y) and a quadrupled area ratio will be described.

(100) is a conventional image enlargement display device, and the main body (+
01) and receivers (102)a to (+02)d. The main body (101) divides the horizontal scanning period and vertical scanning period of the input video signal, and divides the horizontal scanning period and vertical scanning period of the input video signal into
Output to (102)d. The video receivers (102) a to (+02) d input the divided video signals from the main body (+01) and displayed one screen as a whole. As shown in FIGS. 6 and 7, the image receivers (102) a to (102) d are arranged on the horizontal scanning start side (
From the drawing Tonosho) to the receiver (+02) a, (102) b,
Similarly, in the lower row, from the horizontal scanning start side, the receiver (102) a,
(102) Screen r when displayed on a receiver (102)' which is arranged as shown in d and the input video signal is enlarged.
The letters AJ indicate receivers (102)a to receivers (102).
) d is enlarged to display one screen "Δ".

The main body (101) includes a decoder device (103), a controller (104), an A/D converter (105), video memories (106) a to (106) d, and a D/A
It consists of converters (107) a to (1,07) d and encoders (108) a to (10 g) d.

The decoder device (103) inputs a video signal, which is an analog signal, and converts the image signal of the video signal into an A/D converter (103).
05).

The controller (+04) converts the control signal for instructing the human output timing to an A/I) converter (105),
Video memory (106)a to (1,06)d, D/A
The signals are output to converters (107) a to (107) d and encoders (IH) a to (108) d, respectively.

In the A/D converter (105), the controller (104)
The decoder device (103
) is A/D converted and output as a digitized image signal to each of the video memories (106)a to (106)d.

The video memory (106) a can store digitized image signals, and the video memory (106) a can store digitized image signals.
By control signals from the controller (104), the image of the image receiver (102)' shown in FIG.
102) When a signal corresponding to the image received after being enlarged is output from the A/D converter (105), it is controlled to be stored sequentially, and the signal is stored as a divided image signal. Similarly, video memory (+06) b to (106)
d, the image receivers (102)b to (102) at the corresponding positions of the unenlarged image of the receiver (102)' shown in FIG. 7 are controlled by control signals from the controller (104).
) The signal corresponding to the image received after magnification is A/D
The signals output from the converter (105) are controlled to be stored sequentially, and the signals are stored as divided image signals.

The stored divided image signals are output to the corresponding D/A converters (107)a to (107)d, and at this time, the video memories (106)a to (106)d are connected to the controller (104). A series of input signals on the same screen are simultaneously read out by the control signal.

Next, in the D/A converter (107) a, the corresponding video memory (1
06) Input the divided image signal read from a, convert it into a divided image signal which is an analog signal, and output it to the corresponding encoder (108) a. Encoder (108) a
Then, the control signal of the controller (104) causes the D/
The divided image signals from the A converter (107) a are sent to the receiver (1
02) Output to a. The signal output at this time is an analog video signal that the receiver (102)a inputs as a video signal and can receive an image.
2) In a, this video signal is input and reproduced as a normal video.

D/A converters (107)b to (107)d, encoders (10g)b to (10g)d, and receiver (10
2) The same operation is performed in b to (102)d, and the image receivers (I02)a to (102)d receive the images.

In other words, conventional enlarged display uses the method described above, but since the display is performed on each receiver at the same time, each receiver that is continuous in the vertical scanning direction has to scan the same one-screen image. started at the same time, and finished scanning the same one-screen image at the same time.

(Problem to be Solved by the Invention) Therefore, in the case of enlarged display, when the scanning display of the vertical scanning period of the 1th receiver (hereinafter referred to as the upper receiver) ends, the vertical scanning of the The receivers adjacent to the edge (hereinafter referred to as lower receivers) start displaying the next screen in the vertical scanning period.

That is, as shown in FIG. 8 illustrating the scanning situation of a conventional television receiver, the video signal AC corresponding to the vertical scanning period of the input video signal to be expanded is output from the video memory after being expanded. As shown in the lower part of FIG. 8, the vertical scanning of the upper receiver ends with the image signal A-B, and the subsequent vertical scanning of the lower receiver starts with the image corresponding to the vertical scanning period of the next input video signal. Image signal E-P obtained by enlarging the signal DF
It becomes.

In such scanning, if the upper receiver and the lower receiver are considered as one continuous vertically long receiver, the upper half (upper receiver) and the lower half (lower receiver) are the same one vertical receiver. Rather than reproducing the image signal of the scanning period, the upper half (upper receiver) reproduces the image signal of the lower half (lower receiver)! Before the vertical scanning period,
In other words, the image signal of one screen before is being reproduced.

Then, in the case where an image that appears and moves across continuous receivers in the vertical scanning direction, for example, a vertically long bar-shaped image moves from left to right on the continuous receiver screen in the vertical scanning direction, the image shown in FIG. As shown by the dotted chain line in the center plate, a phenomenon occurs in which the image on the lower receiver appears to be ahead of the image on the lower receiver, and the originally continuous bar-shaped image from above and below is cut off between the upper and lower receivers. It appeared to be moving, and the image of the bar that appeared on the upper receiver appeared to be following the image of the bar that appeared on the lower receiver. Such a phenomenon is
In particular, the faster the moving speed of the image that appears between the upper and lower receivers, the more noticeable it is.

Therefore, it is an object of the present invention to eliminate this phenomenon and to make it appear as if the images between the upper and lower receivers are moving continuously.

(Means for Solving the Problems) Therefore, the present invention divides the vertical scanning period and the horizontal scanning period of the image signal included in the input video signal into a plurality of parts, reproduces each of the divided divided image signals, and generates a plurality of divided image signals. In a video enlargement display device that configures one screen with multiple receivers by dividing the image into the receiver, the input image signal is stored under the control of the input control signal, and the vertical scanning period and horizontal period of the stored image signal are adjusted. A video storage device capable of reading divided image signals of a plurality of arbitrary parts of a scanning period; and a plurality of divided image signals that divide the image signal stored in the video storage device into preset vertical scanning periods and horizontal scanning periods. A control device capable of outputting a control signal so as to simultaneously read out divided image signals adjacent to each other in the vertical scanning direction, one divided image signal being read out in the order in which it was stored, and the other divided image signal being read out simultaneously in the reverse order in which it was stored. In a receiver that inputs a plurality of divided image signals from a video storage device and reproduces the divided image signals read out in the order in which they were stored, the divided image signals are vertically scanned in the forward direction and received, and the stored divided image signals are read out in the order in which they are stored. Provided is a video enlargement display device comprising: a receiver that reproduces divided image signals that are read out in reverse order; and a plurality of receivers that vertically scan and receive divided image signals in a reverse forward direction. This solves the above problems.

(Function) Image signals are input to the video storage device, and the video storage device sequentially stores the input image signals.

Next, the image signal stored in the video storage device is divided into a preset vertical scanning period and a horizontal scanning period according to a control signal from the control signal generating device, and mutual reading of divided image signals adjacent to each other in the vertical scanning direction is performed. , one divided image signal is read out simultaneously in the order in which it was stored, and the other divided image signal in the reverse order in which it was stored. Next, the plurality of divided image signals read from the video storage device are input to the image receiving device. In a television receiver to which a plurality of divided image signals are input, the divided image signals read from the video storage device in the order in which they were stored are input to the receiver that reproduces the divided image signals read out in the order in which they were stored, and the divided image signals are is scanned vertically in the forward direction and received.

In one direction, the divided image signals read out in the reverse order stored from the video storage device are inputted to a receiver that reproduces the divided image signals read out in the reverse order stored, and the divided image signals are vertically read out in the reverse forward direction. Scan and receive images. Then, the divided image signals read out in the order in which they were stored adjacent to each other in the vertical scanning direction are scanned in the forward direction, and the divided image signals read out in the reverse order that were stored are scanned in the reverse forward direction. The machine obtains an enlarged image constituting one screen, which can be enlarged and displayed.

(Example) Below, Fig. 1 is an explanatory block diagram representing the first embodiment of the present invention and an embodiment with an enlarged area ratio of 4 times, the vertical axis represents the vertical scanning position, and the horizontal axis represents the elapsed time. FIG. 2 is an explanatory graph of scanning, and FIG. 3 is an explanatory diagram of an image of an input video signal and an image during enlargement, explaining the enlargement situation. The vertical axis represents the vertical scanning position, explaining the second embodiment. The process was carried out based on FIG. 4, which is a scanning explanatory graph in which the horizontal axis represents the elapsed time, a block diagram of the second embodiment, and FIG. Explain an example.

(1) is a video enlargement display device. The video enlargement display device (1) includes a decoder device (2) and a control device (3).
), an A/D converter (4), a video storage device (5), and
It consists of an image receiving device (6).

The video signal input to the video enlargement display device (1) consists of an image signal and a synchronization signal, and the vertical scanning period of the image signal is vertical to the vertical effective scanning period that constitutes the image component displayed on the image receiving device (6). It consists of a blanking period.

The decoder device (2) can separate an image signal and a synchronization signal from an input video signal and output them respectively.

The control device (3) inputs the separated synchronization signal of the decoder device (2), so that the functions of the A/D converter (4), the video storage device (5), and the image receiving device (6) operate normally. The control signal for instructing the input/output timing is
D converter (4), video storage device (5), image receiving device (6)
It is possible to output to each.

Furthermore, by setting in advance that the area magnification is 4 times the area ratio, the vertical scanning period and the horizontal scanning period of the image signal stored in the video storage device (5) are divided into four, and the video storage device (5) A control signal is sent to the video storage device (
5).

The A/D converter (4) sequentially inputs the image signals from the decoder device (2) under the control of the control signal output from the control device (3), encodes the input analog image signal, and converts it into a digital signal. It is possible to convert it into a digital image signal and output it to the video storage device (5).

The video storage device (5) is a video memory (7) that can store the digitized image signal from the D/Δ converter (4).
It consists of a to (7)d. Video memory (7) a to (
7) d is capable of storing the divided image signal of at least one screen, and the video memory (7) a stores the video signal shown in FIG. A signal corresponding to the image of the image on the receiver (8)' that is received by the receiver (8)a after being enlarged is sent to the A/D converter (
4) is controlled to be stored sequentially when output from
The signal can be stored as a divided image signal. Similarly, the image memories (7)b to (7)d are controlled by control signals from the control device (3), respectively, to the corresponding positions of the unenlarged image of the receiver (8)° shown in FIG. When the A/D converter (4) outputs a signal corresponding to the image to be received by the image receivers (8)b to (8)d after enlargement, the signal is sequentially stored, and the signal is stored as a divided image. Store as a signal. Therefore, if the number of horizontal scanning pixels of the video signal l input to the video enlargement display device (1) is 512, and the number of vertical effective scanning lines excluding the vertical blanking period is 480, then in the video memory (7)a, Horizontal scanning pixels "0" to r255Jth and vertical effective scanning lines "01st to r2" when receiving an image without enlarging it to the receiver (8)°
The 39Jth divided image signal is stored, and similarly, in the video memory (7) b, horizontal scanning pixels r256Jth to r511Jth and vertical effective scanning lines "0" to r239J are stored when the image is received at the receiver (8)°. The divided image signal of the th divided image signal is stored in the video memory (C), and the divided image signal of the horizontal scanning pixel "0" to the r255Jth, and the divided image signal of the vertical effective scanning line r240Jth to the r479Jth is stored in the video memory (7) d. , horizontal scanning pixel r 256jth to r
511Jth, vertical effective scanning line r24OJth to r
Each of the 479Jth divided image signals is memorized (however, to be exact, the vertical blanking period is taken into account, so approximately 8% of the divided image signals are stored).
The number of vertical scanning lines is small (one of the remaining vertical effective scanning lines
/2 is each vertical scanning line.

However, for purposes of explanation, it is assumed here that the vertical blanking period is subtracted and the number of vertical scanning lines is 480). The stored divided image signals can be output to the image receiving device (6).

On the other hand, in addition to the above-mentioned functions, the control device (3) has the ability to mutually read out the divided image signals stored in the video memories that are adjacent divided image signals in the vertical scanning direction. Each video memory (
Since control signals are output to 7) a to (7) d, a control signal is output to video memory (7) a so that the divided image signals stored in video memory (7) a are read out in the order in which they were stored, and the The video memory (7)c that stores divided image signals adjacent in the vertical scanning direction to the divided image signal stored in the memory (7)a is stored in the reverse order of storage, that is, divided image signal 1
A control signal can be outputted to the video memory (7)c so as to read the screen from the last stored signal to the first stored signal. Similarly, the divided image signals stored in the video memory (7)b are read out in the order in which they were stored, and the video memory stores the divided image signals adjacent in the vertical scanning direction of the divided digital image signal stored in the video memory (7)b. (7) d is
A control signal can be output to the video memories (7)b and (7)d so as to read them in the reverse order in which they were stored. Of course, in the case of an embodiment in which the preset area magnification is other than 4 times, the same control signal can be output to each necessary video memory.

The image receiving device (6) includes a plurality of image receivers (8)a to (8)d.
Consisting of In this embodiment, the receivers (8)a to (8)d constituting the receiver (6) each have a D/A converter (9).
, an encoder (10), converts the input digitized divided image signal into an analog signal by a D/A converter (9), and further transforms it into a receivable divided image signal by the encoder (lO). and the receiver (8) a to (
8) It is possible to receive the divided image signal inputted by d. Of course, the D/A converter (9) and the encoder (10) may not be provided integrally with the receiver (8)a to (8)d, but may be provided separately, and they may be provided separately from the video storage device (5). It is only necessary that the divided image signals from the video storage device (5) can be transformed into signals that can be received by the receivers (8) a to (8) d. As long as images a to (8) d can be received, they may not be provided in particular.

The receiver (8)a inputs the divided image signals read out from the corresponding video memory (a), and displays a video signal in which the divided portions of the input video signal input to the video enlargement display device (1) are enlarged. The screen is configured to scan and receive images vertically from top to bottom.Similarly, a television receiver (8
)b is also configured to input the divided image signal from the corresponding video memory (7)b, scan in the forward direction, and receive the image. In the receiver (8)c, the stored divided image signals are read out in the reverse order in which they were stored in the video memory (7)C from which the divided image signals to be reproduced are read, so the reproduction is reversed from normal vertical scanning. In this case, the vertical scanning is configured to perform vertical scanning in the reverse direction from the bottom to the top. Similarly, the image receiver (8) d that inputs and reproduces the divided image signals read from the video memory (power d) also reads out the input signals in the reverse order, so it scans vertically in the reverse direction from bottom to top. Similarly to the video storage device (5), the image receiving device (6) can also be configured by increasing or decreasing the number of image receivers depending on the area ratio for enlarging the image.

The following is a step-by-step explanation of how the video signal is reproduced on the receivers (8)a to (8)d of this embodiment.

That is, the input video signal is input to the decoder device (2). Then, the decoder device (2) separates this input video signal into a synchronization signal and an image signal. The separated synchronization signal is output to the control device (3), which receives it and ensures that the functions of the A/D converter (4) and video storage device (5) operate normally. A/D converter (4
), output to the video storage device (5) and the image receiving device (6). On the other hand, the image signal is output to the A/D converter (4),
The A/D converter (4) A/D converts the sequentially input image signals according to the control signal from the control device (3), and outputs them as digitized image signals to the video storage device (5).
Output to.

This digitized image signal is sent to the video storage device (5)
Image memory (7) a, control device (3)
The horizontal scanning pixels "0" to "255" and the vertical effective scanning line "0" are input to the image enlargement display device (1) by the control signal from the receiver (8) when the image is received without being enlarged. ”th to “239th” signals are stored as divided image signals, and are stored in the video memory (7)b and sent to the receiver (8).
Horizontal scanning pixels r256Jth to r when receiving an image at °
511Jth, vertical effective scanning line rOJth to r239
The Jth signal is stored as a divided image signal.

That is, after the horizontal scanning period in the horizontal scanning direction of the divided image signal stored in the video memory (7)a, the video memory (input) stores the continuous divided image signal. Scanning pixel “0” to r 255
Jth, vertical effective scanning line r24OJth to r479J
The th signal is stored as a divided image signal, and the horizontal scanning pixel r 256th to ``
5Il 1st, vertical effective scanning line r240Jth to r4
The 79Jth signal is stored as a divided image signal. That is, the video memory (power C stores the subsequent divided image signals in the vertical effective scanning period in the vertical scanning direction of the divided image signals stored in the video memory (power a), and the video memory 7 (7) d is A subsequent divided image signal in the vertical effective scanning period in the vertical scanning direction of the divided image signal stored in the video memory (7)b is stored.

These stored divided image signals are then sequentially read out by control signals from the control device (3).

That is, upon reception of this control signal, the video memory (7)a reads out the stored divided image signal for the vertical effective scanning line "0" and the horizontal scanning pixel "0", and then reads the signal for the vertical effective scanning line "0". '', horizontal scanning pixel rlJ, and so on.

The signal read from the video memory (7)a is input to the image receiving device (6), and the receiver (8)a of the image receiving device (6) inputs this signal. In the receiver (8)a, the input signal is converted into a signal by the D/A converter (9)a and the encoder (10)a of the receiver (8)a, and based on the signal, the screen is sequentially scanned and stored in the video memory. (By reproducing the divided image signal for one screen that was stored by force a, the reproduction of one reasonable action scanning period is completed.

A control signal from the control device (3) is input at the same time as the video memory (7)b and the video memory (7)a are read out, and reading is performed in the same way, and the video memory (8)b of the video receiver (6) is read out. A signal is output to the D/A of the receiver (8) b.
The converter (9)b and the encoder device (10)b transform the signal into a receivable signal, and the receiver (8)b reproduces the divided image signal for one screen stored in the video memory (7)b. Then, the reproduction of one vertical effective scanning period ends.

On the other hand, the video memory (7)c in which the divided image signals adjacent to the divided image signals stored in the video memory (7)a in the vertical scanning direction are stored is stored in the reverse order of storage, that is, from the last stored signal of one screen. A control signal for controlling reading to the first stored signal is input from the control device (3), and the video memory (7) c is stored in horizontal scanning pixels "0" to r25SJ and vertical effective scanning lines r240J to r479J. Since the th divided image signal is stored in the video memory (power C), the signal of the r479th vertical scanning line r479J is read out, and then the signal of the r478th vertical scanning line is read out. The signal read from the memory (force C) is input to the image receiver (6).The image receiver (6) transmits this signal to the image receiver (8) c
The D/A converter (9)c and encoder device (10)c of the receiver (8)c transform the receiver (8)c so that it can receive the image, and corresponds to the receiver machine (8)c. The video memory (7)c that reads out the divided image signals reads out the stored divided image signals in the reverse order in which they were stored, so the reproduction is reversed from normal vertical scanning, and the vertical scanning is reversed from bottom to top. 1 stored in the image memory (7) c.
By reproducing the divided image signals for the screen, the reproduction of one vertical effective scanning period is completed.

Similarly, a video memory (7) d stores a divided image signal adjacent to the divided image signal in the vertical scanning direction of the divided image signal stored in the video memory (7) b. inputs a control signal from the control device (3) instructing to read out in the reverse order of storage, that is, from the last stored signal of one screen to the first stored signal,
Since the video memory (7) d stores the divided image signals of horizontal scanning pixels r256J to r511J and vertical effective scanning lines r240J to r479J,
The signal of the 479th vertical scanning line r is read out, then the signal of the 478th vertical scanning line r is read out, and thereafter, the stored signals are sequentially read out in the reverse order of storage, and are stored in the video memory (7) d by the receiver (8) d. Similarly to the receiver (8)c, the divided image signals for one screen are reproduced in the opposite direction from the bottom to the bottom in the vertical scanning direction, thereby completing the reproduction of the vertical effective scanning period.

Further, a receiver (8)a and a receiver (8)c as described above.
A method of scanning with a video signal to be reproduced will be explained with reference to FIG.

The vertical axis of the graph shown in FIG. 2 represents the vertical scanning position, and the horizontal axis represents the scanning time. The upper part of Figure 2 shows the relationship between the vertical scanning position and time of the input video signal to be enlarged, and the lower part shows the relation between the vertical scanning position and scanning time of the receiver (8) a and the vertical scanning position of the receiver (8) C. Represents the relationship between scanning position and scanning time.

The input video signal starts scanning, starts vertical effective scanning at position A, and starts scanning at position C! Terminates the vertical period scan. This signal is stored in the video memory (7)a and the video memory (7)c, respectively, and when the vertical scanning position of the input scanning signal reaches point A according to the control signal of the control device (3), the video memory ( 7) a starts g2 storage, and when the vertical scanning position of the input video signal reaches point B, storage in the video memory (7) a ends. Next, the image memory (force C stores the vertical scanning positions from point B to point C. When image memory (7) a and image memory (7) c finish storing, the control device (3) stores the image memory (force C).
7) A control signal instructing to start reading out the stored signal is outputted to a, and a control signal instructing to start reading out the stored signal is also outputted to the video memory (7)c.

In the video memory (a), input this control signal, read out the stored divided image signals in the order in which they were stored, input this signal to the receiver (8) a, and perform vertical scanning in the forward direction. At the same time, in the video memory (7) C, by inputting a control signal, the vertical scanning period B-C of the same vertical scanning signal as the input video signal in which the divided image signal read out by force a existed. Reading of the divided image signals is started in the reverse order of storage, that is, from the last stored signal, and the image receiver (8) C receives the image by vertically scanning in the reverse order.Video memory (7) Similar to video memory (7) a and video memory (7) C, reading of video memory (7) b and video memory (7) d is performed simultaneously,
In the video memory (7) b, the stored divided image signals are read out in the order in which they were stored, and in the video memory (7) d, the stored divided image signals are read out in the reverse order in which they were stored, and the video memory (7) b is read out. The receiver (8)b inputs a signal to be scanned vertically in the forward direction, receives the image by vertical scanning in the forward direction, and the receiver (8)d inputs a signal to be read out from the image memory (force d), and scans the image in the reverse direction (from bottom to top). The image is received by scanning vertically in the direction).

When each of the receivers (8)a to (8)d receives an image in this way, for example, as shown in FIG. Even if the object moves to the right, it appears to move continuously up and down, as shown by the two-dot chain line.

Next, a case in which an image is enlarged to an area ratio of 16 times, which is a second embodiment, will be explained based on FIGS. 4 and 5.

The horizontal axis of the graph in Figure 4 represents the scanning time as in Figure 2, the vertical axis represents the vertical scanning position, the top row represents the relationship between the vertical scanning position and time of the input video signal to be expanded, and the next stage is a video memory (a receiver (8) that scans the divided image signals of force a)
It shows the relationship between the vertical scanning position and scanning time of a, and the following table shows the relationship between the vertical scanning position and scanning time of the receiver (8) that scans the divided image signal of video memory (7) b, and the video memory (Receiver (8) c that scans the divided image signal of force C
Relationship between vertical scanning position and scanning time, image memory (7)
The relationship between the vertical scanning position and scanning time of the receiver (8) d which scans the divided image signals of d is shown, respectively. FIG. 5 is a block diagram of the second embodiment and shows the divided image signals stored in the video memories (7) a to (7) p when the input image signal is divided into 16 parts to the receivers (8) a to (8). ) is an explanatory diagram showing division positions when scanned by p.

The configuration is similar to that of the first embodiment, but in the video storage device (5), the video memories (7) a to (p) are connected to the video storage device (5).
) is divided and stored. The image signal to be divided and stored is divided into four parts each in the vertical effective scanning period and the horizontal scanning period in the same manner as in the first embodiment, that is, one scene when the input image signal is received by the receiver (8)' is divided into vertical and horizontal sections. The video memories (7)a to (7)d are divided into 16 parts.
The video memory (7) b stores the divided image signals that are continuous in the vertical scanning period of the divided image signals stored in the video memory (7) a so that the divided image signals are in the same horizontal scanning period and consecutive vertical scanning periods. The video memory (7) C stores the divided image signals that are continuous during the vertical scanning period of the divided image signals stored in the video memory (7) C, and the vertical scanning period of the divided image signals stored in the video memory (7) C. The continuous divided image signals are stored in the video memory (7) (I
remembers. Similarly, the video memories (forces e to (7) h) are the same horizontal scanning periods that are continuous in the horizontal scanning direction stored in the video memories (forces a to (7) d), and the divided images of continuous vertical scanning periods are stored in the video memories (forces a to (7) d). It is stored as a signal.Video memory (7) i to (7)1 are also stored as video memory (
7) Image memories (7) m to (force p) are stored in image memories (7) i to (force l, respectively), which are divided images of the same horizontal scanning period that are continuous in the horizontal scanning direction. The video memories (7) a to (p) input control signals from the control device (3) and read them out simultaneously as shown in FIG.

That is, the receivers (8)a to (8)p corresponding to the video memories (7)a to (7)p store divided image signals at the division positions as shown in FIG. Video memory (7)
a is a divided image signal of the vertical scanning period of the vertical scanning A-B portion so that one screen when the input image signal is received by the receiver (8)° corresponds to the divided position scanned by image II (8)a. remember. Similarly, the video memory (7)b is vertically scanned B- to correspond to the divided positions scanned by the receivers (8)b to (7)d.
The C1 video memory (7)c stores divided image signals of the vertical scanning period of vertical scanning CD, and the video memory (7)d stores divided image signals of the vertical scanning period of vertical scanning DE. Then, when the video memory (7) d finishes storing the divided image signals, the control device (3)
outputs a control signal, the control signal is input to the video memories (a to (7) d), and the stored divided image signals are sequentially read out. At this time, the video memories (7) a and (7)
The divided image signals read out in c are read out in the order in which they were stored, and the read signals are input to a receiver (8) that receives the image.
)a and (8)c are sequentially scanned in the forward direction to project images respectively. However, video memory (7)b and (7)
) d, the stored divided image signals are read out in the reverse order in which they were stored, and the receivers (8) b and (8) d, which input and receive the read signals, scan the vertical scan of the input signals in the reverse direction. It scans sequentially and displays each image. In this way, one of the divided image signals adjacent to each other in the vertical scanning direction is read out in the stored order, the vertical scan of that signal is scanned in the forward direction from top to bottom, and the other divided image signal is read out. By reading out the stored reverse order and scanning the vertical scan of the signal in the reverse direction from bottom to top, adjacent vertical scanning lines of each divided image signal can start or end scanning at the same time. This results in a long receiver scanning vertically from the top to the bottom.

Similarly, by scanning the signals of video memories (7)e to (6)h, video memories (7)i to (6)l, and video memories (7)m to (6)p, respectively, the receiver (8) a
(The input image signal is reproduced and received so as to constitute one screen with the force p.

In the first and second embodiments, only the vertical effective scanning period excluding the vertical blanking period of the vertical scanning period was stored in the video storage means (6), but the vertical scanning period including the vertical blanking period Divided into whole, video storage means (6)
It is also possible to configure it so that it is stored in

As described above, in the first and second embodiments, for the sake of explanation, the input video signal input to the decoder device is divided into four parts or divided into four parts.
The explanation has been given of an image enlargement display device that is divided into 6 parts and has an area ratio of 4 times or 16 times, but of course other magnifications may be used, and the image memory and other parts are increased to match the magnification, and the control device (3) A/D to match the magnification
A control signal is outputted to sequentially store the digitized image signals output from the converter (4) in each video memory, and when reading out the divided image signals stored in the video memory, the stored divided image signals are are divided image signals adjacent to each other in the vertical scanning direction.The divided image signals stored in one video memory are stored in the order in which they were stored, and the divided image signals stored in the other video memory are stored in the order in which they were stored. A control signal is output to each video memory so that the video memories are read simultaneously in reverse order.

Further, the video storage device (5) includes a plurality of video memories (7
)a to (7)p, and the input digitized image signal is already divided and stored in the video memories (7)a to (7)p, respectively, when it is stored, but the video memory (7)a to (7) each p stores one screen worth of image signals to be input to the video storage device (5), and when reading them, reads out the signals of each divided portion according to the control signal from the control signal generator (3). You can configure it like this. Of course,
In this case as well, signals of adjacent divided parts are read out in the order in which they were stored, and in the reverse order in which they were stored in the other part.

Furthermore, it is constructed with a video memory that has a plurality of output terminals that can read out any part of the stored image signal, and the input digitized image signal can be read out from any part. It is also possible to store one screen in a video memory and output multiple stored signals of the part corresponding to the divided image signal, in which case the video memory that can read from any part can be Configure.

In this way, by simultaneously starting or ending adjacent vertical scans between consecutive television receivers in the vertical scanning direction using the control signal from the control device (3), the viewer can Even if the image on the screen moves between machines, the image appears to move continuously.

(Effects of the Invention) Therefore, according to the present invention, when the video memory storing divided image signals of continuous vertical scanning periods does not read out the stored divided image signals, the stored divided image signals are adjacent to each other in the vertical scanning direction. The divided image signals stored in one video memory are read out in the order in which they were stored, and the corresponding receiver reproduces the horizontal scan from top to bottom, and then reads the divided image signals from the other video memory. The divided image signals stored in are read out in the reverse order in which they were stored, and the corresponding receiver reproduces vertical scanning from bottom to top, so images that appear and move across the top and bottom of the enlarged playback screen, such as a vertically long bar-shaped image, are reproduced. When moving from left to right on the receiver screen, the image on the lower receiver and the image on the upper receiver are
It looks like a continuous bar-shaped image moving up and down, and when playing high-resolution video screens such as high-definition television or high-resolution video, it provides a high-quality enlarged video screen that does not cause movement shift. It becomes possible to obtain.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention, FIG. 2 is an explanatory graph for explaining the scanning state of a vertical scanning signal in the first embodiment, and FIG. 3 is a block diagram showing a first embodiment of the present invention. FIG. 4 is an explanatory diagram of an example input video signal image and an enlarged image;
The figure is an explanatory graph for explaining the scanning state of the vertical scanning signal of the second embodiment, and FIG. 5 is a block diagram of the second embodiment, and an explanatory diagram of the image of the input video signal and the image when enlarged. . Fig. 6 is a two-dimensional diagram showing a conventional example, Fig. 7 is an explanatory diagram of an image of the input video signal and an image during enlargement, and Fig. 8 is an illustration of the scanning state of the vertical scanning signal. This is an explanatory graph for (1)...Video enlargement display device (3)...Control device

Claims (1)

[Claims] By dividing a vertical scanning period and a horizontal scanning period of an image signal included in an input video signal into a plurality of parts, reproducing each divided divided image signal, and receiving the divided image on a plurality of receivers. In a video enlargement display device in which one screen is configured by multiple receivers, the input image signal is stored under the control of the input control signal, and multiple arbitrary portions of the vertical scanning period and horizontal scanning period of the stored image signal are controlled. A video storage device capable of reading divided image signals, and a plurality of divided image signals that divide the image signal stored in the video storage device into preset vertical scanning periods and horizontal scanning periods, which are adjacent to each other in the vertical scanning direction. A control device capable of outputting a control signal to simultaneously read out the divided image signals in the order in which they were stored and the other divided image signals in the reverse order in which they were stored, and a plurality of video storage devices. A receiver inputs divided image signals and reproduces the divided image signals which are read out in the order in which they were stored.The receiver receives the divided image signals by vertically scanning them in the forward direction, and at the same time receives the divided image signals which are read out in the reverse order in which they were stored. What is claimed is: 1. A video enlargement display device comprising a plurality of receivers for vertically scanning divided image signals in a reverse forward direction and receiving the divided image signals.