JPH03114373A - Video magnification display device - Google Patents

Abstract

PURPOSE:To obtain a magnified video picture, with high quality by using a video memory storing consecutive split digital picture signal for vertical scanning period to apply vertical scanning to a picture signal for a same vertical effective scanning period for an input video signal consecutive in time axis at reproduction respectively. CONSTITUTION:The read of a split picture signal for one vertical effective scanning period corresponding to one vertical effective scanning period of an input video signal till the reproduction to receivers 10a-10d is implemented consecutively and the vertical scanning of the receiver 10a corresponding to a video memory 6a and the vertical scanning of the receiver 10c corresponding to the video memory 6c are repeated as if the receivers 10a and 10c were one long receiver connected in the vertical scanning direction by the scanning of a picture for the same vertical effective scanning period of an input video signal of a decoder 2 is started by the receiver 10c as the receiver 10a finishes the scanning of the final end in the vertical effective scanning direction. Similarly, the receivers 10b, 10d repeat the scanning. Thus, the video image between the upper and lower receivers is observed as if it were moved consecutively.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an image enlargement display device, and in detail, 1.
The present invention relates to a video enlargement display device which inputs a video signal of 1, obtains a plurality of divided screens consisting of the screen portions of the video signal, and enlarges and displays the screen of the video signal of 1 on the plurality of screens.

(Prior art) Conventionally, in order to enlarge and display the video signal of I using a plurality of receivers, the image signal of the digitized video signal corresponding to the position of each receiver at the time of enlarged display is made to correspond to each receiver. 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 (100)
01) and receivers (102)a to (102)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 receivers (102)a to (102)d input the divided video signals from the main unit (+01) and displayed one screen as a whole. As shown in FIGS. 6 and 7, the receivers (102) a to (+02) d are moved in the horizontal scanning direction (X) from the horizontal scanning start side (Tonosho in the drawing) to the receivers (+02) a, ( 102)b
, Similarly, the receiver (102)c is placed from the horizontal scanning start side on the lower stage.
, (102)d, and when the input video signal is displayed on the receiver (102)' before being enlarged, the characters on the screen rAJ are as shown in the receivers (102)a to (102).
d is enlarged to display one screen rAJ.

Main body (Lot) +, t, decoder device (103), :]
:/Troller (104), A/D converter (105)
, video memory (106)a to (106)d, D
/ A converters (+07) a to (107) d, and
It consists of encoders (10g) a to (108) 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 (104) sends control signals for instructing input/output timing to the A/D converter (105), video memories (106) a to (106) d, and the D/A converter (
107) a to (107) d, and encoder (10
8) Output to each of encoders (108) a to d.

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 (106) b to (106)
d, the image receivers (102)b to (102) at 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
When the signal is output from the converter (105), it is controlled to be stored sequentially, and the signal is stored as a divided image signal.

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 (10g) 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.
02) In a, this video signal is input and reproduced as a normal video.

D/A converters (107)b to (107)d, encoders (108)b to (10g)d, and a receiver (10
2) A similar operation is performed on the receivers (102)b to (102)d, and the image receivers (102)a to (102)d receive the image.

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 receiver (hereinafter referred to as the upper receiver) ends, the last vertical scanning period of that receiver is 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, video signals A to C corresponding to the vertical scanning period of the input video signal to be expanded are output from the video memory after being expanded. Then, as shown in the lower part of Figure 8, the vertical scanning of the upper receiver ends with image signals A-B, and the subsequent vertical scanning of the lower receiver corresponds to the vertical scanning period of the next input video signal. The image signal E- is obtained by enlarging the video signal DF.
It becomes F.

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) during one 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, a phenomenon occurs in which the image on the lower receiver appears to be ahead of the image on the upper receiver, and the originally continuous vertical bar-shaped image is cut off and moved between the upper and lower receivers. The image of the bar that appeared on the upper receiver appeared to follow 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 can configure one screen with multiple receivers by dividing the image into the receiver, it stores the input image signal and divides arbitrary parts of the vertical scanning period and horizontal scanning period of the image signal to be stored. A video storage device capable of reading a plurality of image signals; and a video storage device capable of dividing the image signal stored in the video storage device into a preset vertical scanning period and a horizontal scanning period, and reading the divided image signals as a plurality of divided image signals. A control signal generator capable of outputting a control signal and outputting a control signal that synchronizes the operation timing of a synchronization signal generator and a video storage device capable of arbitrary delayed reading; Instructs to start reading out the divided image signals from the earliest divided image signal in the divided vertical scanning period of the image signal of one screen, and reads out the other divided image signals in the same horizontal scanning period as the divided image signal. period and a synchronization signal generator capable of arbitrary delayed readout, which outputs a delayed timing signal to the video storage device to instruct the video storage device to immediately start reading out the divided image signals after the reading of the divided image signals of the immediately preceding vertical scanning period is completed. The above-mentioned problem is solved by providing a video enlargement display device characterized by the following.

(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 generator, and at the same time, the video storage device is divided into a preset vertical scanning period and a horizontal scanning period. A delay timing signal is input from the signal generator, reading of the first divided image signal of the divided vertical scanning period is started, and the reading is sequentially performed. Next, upon completion of reading, reading of the divided image signals in the vertical scanning period following the read divided image signals is immediately started. Similarly, the divided image signals following the vertical scanning period are sequentially read out, the reading of the image signal of one screen of the image signals input to the image storage device is completed, and the next input image signal screen is sequentially processed in the same way. By doing so, a signal that can be used for enlarged image display is obtained, and enlarged display becomes possible.

(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, FIG. 3 is an explanatory diagram of an image of an input video signal and an image at the time of enlargement, explaining the enlargement situation, and FIG. Based on FIG. 4, which is a scanning explanatory graph showing elapsed time on the horizontal axis, a block diagram representing the fourth embodiment, and FIG. An example will be explained.

(1) is an image enlarging device. The image enlarging device (1) is
Decoder (2), control signal generator (3), synchronization signal generator (4) capable of arbitrary delayed readout, A/D converter (5)
), video storage device (6), D/A conversion device (consisting of power and receivers (10) a to (to)d), video enlarging device (
The video signal input to 1) consists of an image signal and a synchronization signal, and the vertical scanning period of the image signal consists of a vertical effective scanning period and a vertical blanking period, which constitute the image components displayed on the receiver.

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

The control signal generator (3) inputs the separated synchronization signal of the decoder (2) and outputs the synchronization signal to the synchronization signal generator (4) capable of arbitrary delayed reading. , the video storage device (6), and the D/A converter (7) to operate the functions normally. (6), and the D/A converter (capable of outputting to each output).Furthermore, by setting in advance that the area magnification is 4 times the area ratio, the image stored in the video storage device (6) It is possible to output a control signal to the video storage device (6) to control the vertical scanning period and horizontal scanning period of the signal to be divided into four and read from the video storage device (6).Of course, in cases other than the area ratio of 4 times The vertical scanning period and horizontal scanning period are divided according to the area magnification, and the video storage device (6)
control to read from.

The A/D converter (5) sequentially inputs image signals from the decoder (to the decoder) under the control of the control signal output from the control signal generator (3), encodes the input analog image signal, and generates a digital image. Convert it to a signal and store it in a video storage device (6
).

The video storage device (6) is a video memory (6) capable of storing digitized image signals from the A/D converter (5).
It consists of a to (6)d. Video memory (6) a
to (6)d are capable of storing digital image signals for at least one screen, and in the video memory (6)a, the image before enlargement as shown in FIG. The A/D converter (5) outputs a signal corresponding to the image that is received by the receiver (10)a after being enlarged when the receiver (10)' receives the video signal of The signals can be stored as divided image signals. Similarly, video memory (6
) b to video memories (6) and d, respectively, receive the image at the corresponding position of the unenlarged image of the receiver (10)' shown in FIG. When a signal corresponding to the image to be received after enlargement is output from the A/D converter (5) to the receiver (10)b to receiver (to)d, it is controlled to be stored sequentially, and the signal is stored sequentially. It is stored as divided digital image information. Therefore, if the number of horizontal scanning pixels of the video signal l input to the video enlargement display device t (1) is 512, and the number of vertical effective scanning lines excluding the vertical blanking period is 480, then video memory (6) a
Then, the divided image signals of horizontal scanning pixels "0" to r255Jth and vertical effective scanning lines "0" to r239Jth are stored in the receiver (10)' when the image is received without being enlarged. Similarly, in the video memory (6)b, the receiver (t
o)' Horizontal scanning pixels r 256Jth to r511jth, vertical effective scanning line "0" to r
The 239Jth divided image signal is stored in the video memory (6) c
Then, the divided image signals of horizontal scanning pixels r256Jth to r511Jth and vertical effective scanning lines r240Jth to r479Jth are stored in the video memory (6) d, horizontal scanning pixels "0" to r255Jth, vertical scanning pixels The divided image signals of the r240Jth to r479Jth scanning lines are stored respectively (however, if the vertical blanking period is taken into account, the number of vertical scanning lines will be reduced by about 8%, and 1/2 of the remaining vertical effective scanning lines will be stored respectively. will be the vertical scanning line.However,
Here, for the sake of explanation, it is assumed 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 corresponding D/A converters (8)a to D/A converters (8)d, respectively.

A synchronization signal generating device (4) capable of arbitrary delayed readout is configured to simultaneously start reading out the divided image signals stored in the video memory (6)a and the divided image signals stored in the video memory (6)b. 6) a and (6) b,
The video memory (6)a outputs a delay timing signal that instructs the read timing, and the video memory (6)a
When the readout of the divided image signals stored in the video memory (6)a is completed, a delay timing signal is outputted to instruct the readout timing of the divided image signals following the divided image signals read out from the video memory (6)a in the vertical scanning direction, and similarly, the video memory (6)a 6)
When the reading of the video memory (6)b is completed, a delay timing signal is also outputted to the video memory (6)b for instructing the readout timing of the divided image signal following the divided image signal read from the video memory (6)b.

D/A converter (power is D/A converter (8)a to (8)
) d and encoders (9) a to (9) d.

The D/A converter (8)a inputs the divided image signal extracted from the corresponding video memory (6)a according to the control signal of the control signal generator (3), and converts the signal into an analog signal. Convert it to a divided image signal and send it to the corresponding encoder (9
) Output to a.

Similarly, the D/A converters (8)b to (8)d input the divided image signals read out from the corresponding video memories (6)b to video memories (6)d, respectively, and convert them into analog signals. , and output to the corresponding encoders (9)b to (9)d. The encoder (9) a has a control signal generator (3).
) outputs the divided image signals from the D/A converter (8)a to the receiver (10)a. The signal output to the receiver (10)a at this time is an analog video signal that the receiver (tO)a inputs as a video signal and can receive an image. Inputs a video signal and plays it back as a normal video.

Similarly to the encoders (9) b to (9) d6, the divided image signals from the corresponding D/A converters (8) b to D/A converters (8) d are inputted and handled as analog video signals. output to receivers (10)b to (10)d.

In the receivers (tO)a to (10)d, the video signals obtained by converting the divided image signals from the corresponding encoders (9)a to (9)(I) into normal video signals are input, and the video signals are input to the respective decoders (tO) (tO)a to (10)d. ) reproduces on the screen a video signal in which the divided portions of the input video signal are enlarged.

In this embodiment, the video storage device (6) consists of a plurality of video memories (6) a to (6) d, and the input digital image signal is already divided before being stored in the video memories (6) a to (6). 6) When the video memories (6) a to (6) d each store one screen worth of image signals input to the video storage device (6) and read them, the control signal generator (3) The signal of each divided portion may be read out by the control signal from (hereinafter, referred to as
(referred to as a second embodiment (not shown)). Furthermore, the video memory is constituted by a video memory that has a plurality of output terminals that can read out any part of the stored image signal, and can read out the input digital image signal from any part. It is possible to store one screen worth of signals in a screen and output a plurality of stored signals corresponding to divided image signals (hereinafter referred to as the third embodiment (not shown)).
In that case, a video memory that can be read from any part constitutes a video storage device. D/A converters (also in this embodiment, D/A converters (8) a to (8) d and encoders (9) a to (9)
D/A conversion is performed on the divided image signals read from the video storage device (6), and the encoders (9) a to (
9) The video signal is sent to the receiver (10)a to (1) by d.
0) d, but it is possible to configure it without providing the encoders (8) a to (8) d in a receiver used for a computer, for example, which can receive images using an image signal that is an analog signal. , receivers (10) a to (10
) Any configuration may be used as long as it is possible to output a signal capable of receiving an image of d.

Therefore, the receivers (10)a to (10)d of this embodiment
The process until the video signal is played back is as follows.

That is, the input video signal is input to the decoder (2). Then, the decoder (2) separates this input video signal into a synchronization signal and an image signal. The separated synchronization signal is output to the control signal generator (3), which receives it. On the other hand, the image signal is sent to the A/D converter (5
) is output to. The A/D converter (5) A/D converts the sequentially inputted image signals according to the control signal from the control signal generator (3), and outputs the converted signals to the video storage device (6).

This digitized image signal is transmitted to the control signal generator (
3), the image enlargement display device (1)
digitized signals corresponding to the signals of the horizontal scanning pixels "0" to r255Jth and the vertical effective scanning lines "0" to r239Jth when the image is received without magnification to the receiver (lO) which is input to the receiver (lO). A portion of the image signal obtained is stored as a divided image signal in the video memory (6)a of the video storage device (6).
is stored in the video memory (6)b, and is stored in the receiver (10).
'Horizontal scanning pixels r256jth to r
511Jth, vertical effective scanning line “0” to r 23
The digitized image signal corresponding to the 9Jth signal is stored as a divided image signal. In other words, the video memory (
6) The continuous divided image signal after the horizontal scanning period in the horizontal scanning direction of the divided image signal stored in a is stored in the video memory (
6) Stored in b. Similarly, the signals of horizontal scanning pixels "0" to r255J and vertical effective scanning lines r240J to r479J are stored as divided image signals in video memory (6) c, and in video memory (6) d,
Signals from horizontal scanning pixels r256Jth to r51Nth and vertical effective scanning lines r240Jth to r479Jth are stored as divided image signals. That is, the video memory (6
)c stores a divided image signal which is continuous after the vertical q-effect scanning period in the vertical scanning direction of the divided image signal stored in the video memory (6)a and whose scanning period is the same as that of 6) d stores a divided image signal that is continuous after the vertical effective scanning period in the vertical scanning direction of the divided image signal stored in the video memory (6) b and has the same horizontal scanning period. Next, these stored divided image signals are sequentially read out using a delayed timing signal from a synchronizing signal generator (4) that can be read out with an arbitrary delay. That is, the synchronization signal generator (4) capable of arbitrary delayed readout first outputs to the video storage device (6) a delayed timing signal instructing the reading of the divided image signal stored in the video memory (6)a, At the same time, a delay timing signal instructing the reading of the divided image signal stored in the video memory (6)b is output to the video storage device (6), and the video storage device (6) receives this.

Upon receiving this delayed timing signal, the video memory (6)a stores the stored divided image signal on the vertical effective scanning line "0".
The signal of the ``0''th horizontal scanning pixel is read out, and then the signal of the ``0''th vertical effective scanning line, the ``!''th horizontal scanning pixel, and so on are sequentially read out. At this time, at the same time as reading out sequentially, the A/D converter (5) in the video memory (6)a
) and store the new segmented image signal from
When the divided image signals for the vertical effective scanning period have been read out, the divided image signals for one vertical effective scanning period of the next image are stored. The same applies to the video memories (6)b to (6)d below.

The signal read from the video memory (6)a is input to the D/A converter (8)a, which converts this signal into an analog signal and encodes it.
) a, and encoder (9) a receives this signal. The encoder (9)a has a control signal generator (
3) is output as a video signal to the receiver (10)a. The receiver (10)a sequentially scans the screen based on the received signals and reproduces the divided image signals for one screen stored in the video memory (6)a.
Ends reproduction of the vertical effective scanning period.

On the other hand, video memory (6) b and video memory (6) a
At the same time as the readout, a delayed timing signal from the synchronization signal generator (4) capable of arbitrary delayed readout is input, readout is performed in the same way, and the corresponding D/A converter (8)b, encoder (9)b and The receiver (10)b reproduces the divided image signal for one screen stored in the video memory (6)b, thereby completing the reproduction of the I vertical effective scanning period.

Next, a synchronization signal generator (4) capable of arbitrary delayed reading
At the same time as the reading of the divided image signals for l vertical effective scanning periods stored in the video memory (6) a is completed, the divided image signals stored in the video memory (6) c are transferred to the video storage device (6). The video memory (6) c receives this delay timing signal.

The video memory (6) c stores the stored divided image signal on the vertical scanning line r24 by receiving this delayed timing signal.
OJ-th, horizontal scanning pixel "0"-th signal is read out, and then vertical effective scanning line r240j-th, horizontal scanning pixel Il is read.
Read out sequentially, starting with the first one.

The signal read from the video memory (6) c is input to the D/A converter (8) c, which converts this signal into an analog signal and sends it to the encoder (9) c. The encoder (9) c receives this. The encoder (9)C outputs a video signal to the receiver (10)C according to the control signal from the control signal generator (3). The receiver (10)c sequentially scans the screen based on the received signals and reproduces the divided image signals for one screen stored in the video memory (6)c. Ends reproduction of the vertical effective scanning period.

On the other hand, even in video memory (6) d, video memory (6) b
A delay timing signal from a synchronization signal generator (4) capable of arbitrary delayed reading is input so as to start reading the stored divided image signal at the same time as the reading of one vertical effective scanning period ends, and reading is performed in the same manner. Corresponding D/A converter (8) d, encoder (9) d and receiver (to) d
By reproducing the divided image signal for one screen stored in the video memory (6)d, the reproduction of the I vertical effective scanning period is completed.

In this way, the reading of the divided image signals of the I vertical effective scanning period corresponding to one vertical effective scanning period of the input video signal and the reproduction to the receivers (10) a to (10) d are performed continuously. Therefore, the effective vertical scanning of the receiver (10)a corresponding to the video memory (6)a and the vertical scanning of the receiver (10)c corresponding to the video memory (6)c are the same as those of the decoder (
The image receiver (10) c starts scanning the image of the same vertical effective scanning period of the input video signal of 2) at the end of scanning of the final end in the vertical effective scanning direction of the image receiver (10) a.
10) Repeat scanning as if a and receiver (10)c were two long receivers connected in the vertical scanning direction. Similarly, the receiver (10)b and the receiver (10)d repeat scanning as if they were one long receiver connected in the vertical scanning direction.

Further, a receiver (10)a and a receiver (10) as described above.
A method of scanning the video signal to be reproduced in c. 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 Fig. 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 (10)a and the vertical scanning position of the receiver (10)c. Represents the relationship between scanning position and scanning time,
Vertical scanning along the vertical axis in both the upper and lower stages is performed from above to below. The input video signal starts scanning, starts vertical effective scanning at position A, and ends scanning for one vertical effective period at position C.

This signal is transmitted to video memory (6) a and video memory (
The vertical scanning of the input video signal is from A to B, and the vertical scanning of the input video signal is stored in the video memory (6) a.
Images from C to C are stored in the video memory (6)c. When the vertical scanning position of the input video signal reaches point B, storage in the video memory (6)a ends. Video memory (6)a
Then, a delayed timing signal instructing to start reading from the synchronization signal generator (4) capable of arbitrary delayed reading is input, and the stored divided image signals are sequentially read out, and the receiver (10) a is vertically scanned. Ru. Video memory (6)a
Now, when vertical scanning A-B is completed, a delay timing signal is input to instruct to start reading from the synchronization signal generator (4) which can read out with arbitrary delay, and the vertical scanning of the input video signal of the next screen is inputted. Vertical scanning of scan DE is started after the vertical blanking period has elapsed. On the other hand, video memory (
6) When only the reading of the vertical scan AB of a is completed, the video memory (6) c inputs the delayed timing signal from the synchronization signal generator (4) which can be read with arbitrary delay, and the reading of the video memory (6) a is started. The reading of the divided image signals of the same vertical scanning period BC as the input video signal in which the divided image signals existed is started, and the readout is sequentially completed. Next, in the video memory (6) c, when the vertical scanning A-B is completed, a delay timing signal is inputted to instruct the start of reading from the synchronization signal generator (4) capable of arbitrary delayed reading. Vertical scanning EF' of the input video signal of the screen starts after the vertical blanking period has elapsed.

Scanning for one vertical effective period up to vertical scanning G-1 of the input video signal is performed in the same manner. That is, video memory (6)a
In this case, since the next image signal is stored at the same time as the signal between vertical scanning D and E is read, the signal between vertical scanning D and E is stored.
When the reading of the next vertical scan G-1 is completed, the storage of the image signal of the next vertical scan G-1 is completed, so the scanning of the vertical scan D-E is completed, and after the vertical blanking period has elapsed, the storage of the image signal of the next vertical scan G-1 is completed.
11 vertical scanning starts 1jn. Similarly, the video memory (6) c stores the next image signal at the same time as it reads out the signal between the previous vertical scanning E and F, so when the reading of the vertical scanning E and F ends, the next image signal is read out. vertical scanning 1-1-1
Since the storage of the image signal has been completed, vertical scanning E-
After the vertical scanning of F is completed and the vertical blanking period fifl has elapsed, that is, the image memory (6)a is
Immediately after the vertical scanning is completed, reading of the divided image signals to be stored is started, sequentially read out, and reading is completed. In this way, the synchronizing signal generator (4), which can be read out with arbitrary delay, outputs a part of the image signal of the stored input video signal to the receiver (10) as the summer vertical effective scanning period of the upper receiver (10)a in the vertical scanning direction. (10) a vertically scans, and as it ends, the receiver (10) c on the lower side in the vertical scanning direction moves to the receiver (10) a.
The receiver (1
0) By performing vertical scanning as the l vertical effective period of c, the image signal of one vertical effective scanning period of the input video signal is vertically scanned by the receiver (10)c following the vertical scanning of the receiver (10)a. , it looks like a vertically long receiver scanning from the top to the bottom.

Receivers (10)b and (10)d were also vertically scanned in the same manner as receivers (10)a and (10)c, so that the vertically long receivers were vertically scanned from the top to the bottom. It becomes like this. However, in the case of receiver (10)b and receiver (10)d, the horizontal scanning period is different, and the receiver (10)d has different horizontal scanning periods.
10) Perform vertical scanning of the divided image signals read by the receiver (10)a and the receiver (10)c and the divided image signals that are continuous in the horizontal scanning direction.

In this first embodiment, for the sake of explanation, the input video signal input to the decoder is divided into four parts, and the video enlargement display device has been described with an area ratio of 4. Of course, other integer multiples may also be used, and video memory, etc. Generates a synchronizing signal that can be read out with an arbitrary delay so that scanning is repeated between consecutive receivers in the vertical scanning direction as if they were one receiver. Device (4
) may be configured to output a delay timing signal instructing the read timing to the video storage device (6).

Therefore, as a fourth embodiment, a scanning method of a divided image signal of a video enlargement display device that enlarges the image with an area ratio of 16 times by dividing the image of the input video signal into four in the vertical and horizontal directions is shown in FIGS. 4 and 5.
This will be explained based on the diagram.

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 receiver (1) that scans the divided image signals of the video memory (6)a.
0) represents the relationship between the vertical scanning position and scanning time of a;
Receiver (10) that scans the divided image signals of video memory (6)c; Relationship between the vertical scanning position and scanning time of C, and the receiver (10) that scans the divided image signals of video memory (6)d.
d represents the relationship between the vertical scanning position and the scanning time, respectively. Figure 5 is a block diagram and video memory when dividing into 16 parts.
(6) It is an explanatory view showing the division position when the divided image signals stored in a to (6)p are scanned by the receivers (10)a to (10)p.

The configuration is similar to that of the first embodiment, but in the video storage device (6), video memories (6)a to (6)p are connected to the video storage device (6).
6) divides and stores the input image signal. The image signal to be divided and stored is divided into four parts each in the vertical scanning period and the horizontal scanning period in the same manner as in the first embodiment, that is, one screen when the input image signal is received by the receiver (10)' is divided vertically and horizontally. It is divided into 16 parts, and the video memories (6)a to (6)d are
The video memory (6) b stores the divided image signals that are continuous in the vertical scanning period of the divided image signals stored in the video memory (6) a so that the divided image signals are in the same horizontal scanning period and consecutive vertical scanning periods. The video memory (6)c stores the divided image signals that are continuous during the vertical scanning period of the divided image signals stored in the video memory (6)b, and the divided image signals stored in the video memory (6)c. The divided image signals that are continuous during the vertical scanning period are stored in the video memory (6
) d remembers. Similarly, video memory (6)e to (6)
) h is stored so as to be a divided image signal of the same horizontal scanning period that is continuous in the horizontal scanning direction stored in the video memories (6) a to (6) d, and of continuous vertical scanning periods. Video memories (6) i to (6) I are also stored in video memories (6) e to (6) h, video memories (6) m to (6) p and video memories (6) i to (
6) Store the divided image signals of the same horizontal scanning period that are continuous in the horizontal scanning direction, respectively, stored in l. Video memory (
6) a to (6) p each input a delayed timing signal from a synchronization signal generator (4) capable of arbitrary delayed reading;
As shown in FIG. 4, each delayed readout is performed.

That is, the image receivers (In) a to (10) p corresponding to the video memories (6) a to (6) p store divided image signals at the divided positions as shown in FIG. Video memory (6)
a is a divided image signal of the vertical scanning period of the vertical scanning portion A-B so that when the input image signal is received by the receiver (to)', one screen corresponds to the divided position scanned by the receiver (10)a. Remember. Video memory (to)b~(to)
Similarly, video memory (10)b is a vertical scanning B-01 and video memory (10)c is a vertical scanning CD so that the video memory (10)b corresponds to the divided position scanned by the receivers (10)b to (10)d.
1 video memory (10) d stores divided image signals of the vertical scanning period of vertical scanning DE. Then, when the video memory (10) a finishes storing the divided image signals, a delayed timing signal is inputted from the synchronization signal generator (4) which can read out the divided image signals with an arbitrary delay, and the stored divided image signals are sequentially read out.
The reading of the vertical scanning A-H divided image signals is completed. Next, the vertical scan A-B stored in the video memory (6)a
When the reading of the divided image signals is completed, the video memory (6
) Vertical scanning B- where b inputs and stores a delayed timing signal from a synchronizing signal generator (4) capable of arbitrary delayed reading.
The divided image signals of C are sequentially read out, and the reading is completed. Next, the vertical scan B-C stored in the video memory (6) b
When the reading of the divided image signals is completed, the video memory (6
) Vertical scanning C-c inputs and stores a delayed timing signal from a synchronization signal generator (4) capable of arbitrary delayed reading.
The divided image signals of 1) are sequentially read out, and the readout is completed.

Next, the vertical scanning C- stored in the video memory (6)c
When the reading of the divided image signal of D is completed, the video memory (
6) Synchronous signal generator (4) in which d can be read with arbitrary delay
Vertical scanning D that inputs and stores a delayed timing signal from
By sequentially reading out the divided image signals of -E and completing the reading, it becomes like a vertically long receiver vertically scanning from the top end to the bottom end. Similarly, video memory (6) e
By scanning the signals of video memories (6)l to (6)l, video memories (6)m to (6)p, respectively, input signals are input to the receivers (10)a to (10)p. The image signals are reproduced and received so as to constitute one screen. Note that the fourth embodiment can also be constructed as a video storage device (6) similar to the second and third embodiments.

Further, in the first to fourth embodiments, only the vertical six-effect scanning period excluding the vertical blanking period of the vertical scanning period is stored in the video storage means (6), but the image storage means (6) stores only the vertical six-effect scanning period excluding the vertical blanking period of the vertical scanning period. It is also possible to divide the entire vertical scanning period and store it in the video storage means (6). In this case, the D/A converter (configuring the power) can be configured to provide a vertical blanking period in each video memory. do it.

(Effects of the Invention) Therefore, according to the present invention, a video memory storing divided digital image signals with consecutive vertical scanning periods can continuously scan the same vertical effective scan of the input video signal on the time axis during playback. Since the image signal of the period is vertically scanned, even if an image that appears and moves across the top and bottom of the enlarged playback screen, for example, a vertically long bar-shaped image moves from left to right on the receiver screen, the bottom side will be scanned vertically. The image on the receiver and the image on the upper receiver will appear as one continuous bar-shaped image moving up and down, and when playing back high-resolution video screens such as high-definition television or high-resolution video. It is also possible to obtain a high-quality enlarged video screen with minimal movement shift.

[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 first embodiment, and FIG. 5 is a block diagram of the fourth embodiment, an explanatory diagram of the image of the input video signal and the image when enlarged. be. Fig. 6 is a plot diagram showing a conventional example, Fig. 7 is an explanatory diagram of an image of an input video signal and an image during enlargement, which explains the enlargement situation, and Fig. 8 explains a scanning state of the vertical scanning signal. This is an explanatory graph for. (1)...Video enlargement device (3)...Control signal generator (4)...Arbitrary readable synchronization signal generator (6)...Video storage 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 that can configure one screen with multiple receivers, it is possible to store an input image signal and read out divided image signals of multiple arbitrary parts of the vertical scanning period and horizontal scanning period of the stored image signal. A video storage device capable of dividing an image signal stored in the video storage device into a preset vertical scanning period and a horizontal scanning period and outputting a control signal to read out the divided image signals as a plurality of divided image signals. , a synchronization signal generator capable of arbitrarily delayed reading, a control signal generator capable of outputting a control signal that matches the operation timing of the video storage device, and a control signal generator capable of mutually reading out a plurality of divided image signals read from the video storage device, Instructs to start reading the image signal of one screen from the first divided image signal in the divided vertical scanning period, and reads other divided image signals in the same horizontal scanning period as the divided image signal and in the immediately preceding vertical scanning period. A video enlarging display device comprising: a synchronization signal generator capable of arbitrary delayed reading, which outputs a delayed timing signal to a video storage device to instruct the video storage device to immediately start reading out the divided image signal of a period. .