JP2001195048A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image display which maintains the multi-display effect by suppressing picture quality deterioration such as display and synchronism deviation and variation in aspect ratio on a screen even if a transmission error occurs. SOLUTION: This device is provided with a synchronizing signal error detecting means 9 which monitors a synchronizing signal, an image data error detecting means 19 which monitors image data, and an image data switching means 11 which performs display switching with their error detection signals; if an error occurs, the synchronizing signal and image data are switched from other channels to continue the displaying.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device for displaying image data on each of a plurality of display screens, and particularly to an effective display such as a large-screen multi-display or a display demonstration used in a concert. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device that displays a synchronizing error or a disturbance of an image due to a transmission error of a synchronizing signal and image data without being noticed by a spectator in a field requiring a demonstration.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a configuration diagram illustrating a conventional image display device disclosed in Japanese Unexamined Patent Publication (Kokai) No. H10-15095. In the figure, 101 is the whole image generating means, 102 is the whole screen reduction distribution means, 103 is the display control means, 104
Is a display unit, 105 is a reduction setting unit, 107 is an entire screen memory, 108 is an entire screen reduction unit, 109 is a reduction setting memory, and 110 is a reduction screen memory. Reference numeral 111 denotes a screen information distribution unit.

Next, the operation will be described. The whole screen generating means 101 creates a whole screen to be displayed on the entire multi-screen, and outputs it to the whole screen reduction distribution means 102. The whole screen reduction distribution unit 102 distributes the whole screen in a reduced manner based on the reduction method set in the reduction setting unit 105, and outputs a partial screen corresponding to each sound display control unit 103. In the entire screen reduction distribution unit 102, the entire screen output from the entire screen generation unit 101 is stored in the entire screen memory 107.
The reduction method set by the reduction setting means 105 is stored in the reduction setting memory 109. The contents of the reduction setting memory 109 are the reduction ratio in the vertical and horizontal directions and the display range of the reduced screen. The entire screen reducing unit 108 reduces the entire screen based on the contents of the reduced memory 109 and stores the reduced entire screen in the reduced screen memory 110. Here, in a normal state where all the display means 104 and the display control means 103 are in a healthy state, the display range becomes the whole at a reduction rate of 1 in both the vertical and horizontal directions,
The contents of the reduced screen memory 110 are
Is equal to the contents of

[0004] The screen information distribution means 111 cuts out a partial screen corresponding to each sound display means 104 from the reduced screen memory 110 and outputs it to the corresponding display control means 103 together with a synchronization signal and a control signal. Each display means 104
Based on the synchronization signal and control signal output from each of the sound display control means 103, the corresponding partial screen is displayed.

[0005]

The conventional image display apparatus does not disclose processing when an error occurs in transmission of image data, a control signal, a synchronization signal, or the like between the screen information distribution means and the display control means. If an error occurs in the display control means, image data, control signals, synchronization signals, and the like are not input to the display means. Even though the display means is normal, no image is displayed on the display means, and the multi-display is not displayed. There was a problem that the effect was reduced by half. Furthermore, depending on the position of the failed display means, the aspect ratio of the image when reduced is displayed changes, resulting in an unnatural image display, and the quality of the image is significantly reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. If the display means is normal, the display effect of the multi-display can be obtained even if a transmission error occurs on the path to the display means. It is an object of the present invention to provide an image display device that can display images while maintaining image quality and suppressing a decrease in image quality due to a change in aspect ratio.

[0007]

According to the first aspect of the present invention, there is provided an image display apparatus, comprising: a synchronizing signal generating means for generating a synchronizing signal of image data displayed on each of a plurality of display screens; Synchronization signal error detection means for detecting an error of the synchronization signal based on the synchronization signal; synchronization signal switching means for switching a synchronization signal in which an error is detected by the synchronization signal error detection means to another normal synchronization signal; And a plurality of image display means for displaying an image on each display screen.

According to a second aspect of the present invention, there is provided the image display apparatus according to the first aspect, wherein an error detection pattern insertion means for inserting an image pattern for detecting an error in transmission of image data and image data. Image data error detecting means for detecting the transmission error of the image data, and display image switching means for switching the image data in which the transmission error of the image data is detected by the image data error detecting means to image data of another display screen. Features.

According to a third aspect of the present invention, in the image display device according to any one of the first and second aspects, when a transmission error of the image data is detected, the image data is used as the image data. Image fixed output means for outputting fixed image data.

According to a fourth aspect of the present invention, in the image display device according to any one of the first to third aspects, when an image data transmission error is detected, another display is performed. Image enlargement means for enlarging image data of the screen.

According to a fifth aspect of the present invention, in the image display device of the first aspect, when an image data transmission error is detected, another display is performed. Image reducing means for reducing image data of the screen.

According to a sixth aspect of the present invention, in the image display device of the first aspect, when an image data transmission error is detected, another display is performed. An image synthesizing means for enlarging and reducing the image data of the screen and the image data from the image fixed output means and synthesizing them is provided.

According to a seventh aspect of the present invention, in the image display device according to any one of the first to sixth aspects, when an image data transmission error is detected, the error is detected. Special effect display control means for displaying a special effect on the screen using image data other than the displayed display screen.

According to an eighth aspect of the present invention, in the image display device according to any one of the first to seventh aspects, the synchronizing signal error detecting means outputs the synchronizing signal of each display screen. By monitoring, an error of the synchronization signal is detected.

According to a ninth aspect of the present invention, in the image display device according to any one of the first to seventh aspects, the image data error detecting means includes a common area image of each display screen. Is inserted, and the transmission error of the image data is detected by comparing the pattern of the area.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments 1 to 9 of the present invention will be described below.
Will be described. Embodiment 1 FIG. FIG. 1 is a configuration diagram showing an image display device according to Embodiment 1 of the present invention. In the figure, reference numeral 1 denotes an input image acquisition means for inputting various image data, 2 denotes an image resolution conversion means for converting the image data acquired by the input image acquisition means 1 into a common image format, and 3 denotes an image resolution conversion means. Means for reducing and enlarging various kinds of image data and synthesizing them as one piece of image data; and 4, a plurality of displays configured as a multi-display by combining the image data synthesized by the image scaling / combining means. Image dividing means 5 for dividing according to the number of means, transmitting means 5 for transmitting each image divided by the image dividing means 4 and a synchronization signal, 5a to 5f each element of the transmitting means 5, and 6 for the transmitting means 5 Receiving means for receiving image data and a synchronizing signal from the CPU, synchronizing signal generating means for generating a synchronizing signal for displaying an image, and 8a to 8f indicating images from the receiving means 6 Image display means 9 for displaying data based on the synchronization signal; 9 a synchronization signal error detection means for monitoring the synchronization signal to each display means 6 obtained from the reception means and detecting a transmission error of the synchronization signal; Synchronous signal switching means for switching the synchronous signal in response to the occurrence of an error from the synchronous signal error detecting means 9.

Next, the operation will be described. First, various kinds of image data (for example, NTSC, PC, HDTV, SHD, etc.) are captured by the image obtaining means 1. At this time, since the spatial resolution and the temporal resolution of the image data are different from each other, the image data is subjected to resolution conversion by the image resolution conversion means 2 and input to the image enlargement / reduction / composition means 3. The image enlargement / reduction / synthesis means 3 includes a plurality of display means 8 constituting a multi-display.
The acquired image is combined with the display size of one screen displayed by.

For example, a multi-display composed of six screens will be described as an example. Assuming that each of the display means 8a to 8f has a display resolution of 800 × 600, two rows vertically and three rows horizontally.
In the case of a column configuration, the display size of one screen is 2400 x 1200
Becomes If the acquired image is only PC (800 × 600), it is enlarged to 2400 × 1200 and displayed. If the acquired images are PC (800 × 600) × 3, one of them is 1600
The image is enlarged to × 1200 (using two horizontal columns and two vertical columns), and the remaining two are displayed at 800 × 600 × 2 (using the remaining one horizontal column and two vertical columns) at the same magnification. NTSC (720 × 480), HDTV (1920
Similarly, in the case of images such as SHD (2048 × 2048 or more) and SHD (2048 × 2048 or more), the display size (2400 × 120
0), add enlargement / reduction / cutout / synthesis,
Output to the image dividing means 4. How to combine the acquired images is optional, and may be set from an external terminal, or may be stored and set in a memory or the like.

The image data synthesized into one image is divided by the image dividing means 4 into the number of image display means 8 constituting the multi-display, and the divided image data 6ai to 6f are divided.
i (Here, if each of the image display means 8a to 8f constituting the multi-display is called a channel, it is divided into six in FIG. 1 as an example, so that there are six channels). The synchronizing signal 7s of the image data is generated by the synchronizing signal generating means 7 and the divided image data 6a
The data is transmitted to the receiving means 6 by the transmitting means 5 together with i to 6fi. The divided image data 6ai to 6fi are directly input to the image display means 8.

Synchronization signal 6a for each channel (hereinafter CH)
s to 6fs are input to the synchronization signal switching means 10 through the synchronization signal error detection means 9. Synchronous signal switching means 10
If the synchronizing signal is normal in the path from the synchronizing signal generating means 7 to the synchronizing signal error detecting means 9, the synchronizing signal 10s is supplied to each image display means 8, and an image is displayed based on the synchronizing signal.

If an error occurs somewhere along the route, for example, if a synchronization signal transmission error occurs in CH5, the synchronization signal error detection means 9 detects a synchronization signal error in CH5. The detected error is notified to the synchronizing signal switching means 10, and the synchronizing signal switching means 10 selects a normal synchronizing signal of a channel other than CH5 among CH1 to CH6, and a normal synchronizing signal is displayed on the image display means 8e. The supplied and normal images can be displayed. In the first embodiment, an example is described in which the number of channels is six, but the number of channels may be an arbitrary number.

As described above, according to the first embodiment,
The synchronization signal error detection means 9 monitors the synchronization signal error of each channel, and when an error is detected, the synchronization signal switching means 10 selects and displays a synchronization signal of a normal channel among the divided channels. Since the signal is output to the means 6, even when a synchronization signal transmission error occurs in a certain channel, a normal image can be displayed, and the display effect of the multi-display can be maintained.

Embodiment 2 FIG. FIG. 2 is a block diagram showing an image display device according to a second embodiment of the present invention. In the figure, reference numeral 11 switches image data of each channel from the receiving means 6 and outputs the data to each channel of the image display means 8. Data switching means 19 is an image data error detecting means for detecting a transmission error from the image data of each channel received by the receiving means 6. When an image data transmission error is detected, the image data switching unit 11 is notified of the error. Reference numeral 28 denotes an error detection pattern insertion unit for inserting an image pattern for detecting an error on the receiving side. Other configurations are the same as those in FIG. 1, and the same reference numerals are given and the duplicate description will be omitted.

Next, the operation will be described. The image data obtained by the image obtaining means 1 is
Is subjected to resolution conversion, and is input to the image enlargement / reduction / composition means 3. The image enlargement / reduction / synthesis unit 3 performs enlargement / reduction / combination of the acquired image as described in the first embodiment, and further converts an image pattern for detecting an error on the receiving side from the error detection pattern insertion unit 28. Insert
Output to the image dividing means 4.

For example, it is assumed that an image synthesized on one screen by the image enlargement / reduction / synthesis unit 3 is divided into six channels by the image division unit 4 and transmitted by the transmission unit 5. The image data received by the receiving means 6 enters the image data switching means 11 and the image data error detecting means 19 monitors whether the image pattern inserted by the error detecting pattern inserting means 28 matches each channel. ing.

If the inserted image pattern matches each channel, the image is displayed as it is on the display means 8 of each channel. If not matched, here CH3
, The image data error detecting means 19 outputs an image data error notifying signal 19a to the image data switching means 11 to notify that there is an error in CH3. In response to the image data error notification signal 19a, the image data switching unit 11 switches from CH3 to the display unit 8c.
, Image data of another channel (for example, an image of CH2) is selected. Therefore, the display means 8
, A normal image is displayed.

Here, an example has been described in which the number of channels is six, but the number of channels may be any number. As the image pattern to be inserted, for example, the same image pattern may be inserted in all the channels, and may be appropriately changed for each frame, or each channel may have a different image pattern. Alternatively, a configuration may be employed in which a plurality of memories are provided for the image pattern, and a plurality of fixed images are input in advance and compared. Further, the image data switching means 11 may switch to the image data of any of the normal channels for the channel having the error, or use a terminal or the like from the outside to set a method of switching to which channel. It may be set, or may be stored in a memory or the like and set from there.

As described above, according to the second embodiment,
The transmission error of the image data of each channel is monitored by the image data error detecting means 19, and when an error is detected, the image data switching means 11 selects the image data of the normal channel from all the channels. Since the image is output to the display means 6, a normal image can be displayed even when an image data transmission error occurs in a certain channel, and the display effect of the multi-display can be maintained.

Embodiment 3 FIG. 3 is a block diagram showing an image display device according to a third embodiment of the present invention. In FIG. 3, reference numeral 12 denotes a display on the display unit 8 when image data received by the reception unit 6 has a transmission error. An image fixing output unit 12 for generating an image fixing signal such as a blank or a company logo as image data. Other configurations are the same as those in FIG. 1, and the same reference numerals are given and the duplicate description will be omitted.

Next, the operation will be described. The image data obtained by the image obtaining means 1 is
Is subjected to resolution conversion, and is input to the image enlargement / reduction / composition means 3. The image enlargement / reduction / combination unit 3 enlarges / reduces / combines the acquired image as described in the first embodiment, and inserts an image pattern for detecting an error on the receiving side from the error detection pattern insertion unit 28. Then, it outputs to the image dividing means 4.

For example, it is assumed that an image synthesized on one screen by the image enlargement / reduction / synthesis unit 3 is divided into six channels by the image division unit 4 and transmitted by the transmission unit 5. The image data received by the receiving means 6 enters the image data switching means 11 and the image data error detecting means 19 monitors whether the image pattern inserted by the error detecting pattern inserting means matches each channel. I have.

If the inserted image pattern matches each channel, the image as it is is displayed on the display means 8 of each channel. If not matched, here CH3
, The image data error detecting means 19 outputs an image data error notifying signal 19a to the image data switching means 11 to notify that there is an error in CH3. The image data switching means 11 outputs image data of another channel (for example, an image of CH2) or a fixed image generated by the image fixed output means 12 in the image data switching means 11 by the image data error notification signal 19a as an output from the CH3 to the display means 8c. The display image is arbitrarily switched from among signals (for example, a blank or a company logo for a presentation or the image of the singer for a concert or the like), and a normal image is displayed on the display means 8. Become.

The fixed output image pattern may be obtained by adding a pattern storage memory to the outside, or may be set from an external control terminal or the like. Further, the image data switching means 11 may switch to the image data of any of the normal channels to the channel having the error, or set the channel to be switched to from an external device or the like. Alternatively, it may be stored in a memory or the like, and set from there.

As described above, according to the third embodiment,
The image data error detecting means 19 monitors the transmission error of the image data of each channel. When the error is detected, the image data switching means 11 causes the image data of the normal channel among the channels or the image fixed output means. Since a fixed image signal such as a blank or a company logo generated by the device 12 can also be selected, a normal image can be displayed even when an image data transmission error occurs in a certain channel, and the display effect of the multi-display can be maintained. .

Embodiment 4 FIG. FIG. 4 is a block diagram showing an image display device according to a fourth embodiment of the present invention. In the figure, reference numeral 23 denotes an arbitrary image received by the receiving unit 6 upon receiving an error signal from the image data error detecting unit 19. Enlargement processing is performed on data, and image data switching means 1
1 is an image enlarging means for outputting the image data to the output unit 1. Other configurations are the same as those in FIG. 1, and the same reference numerals are given and the duplicate description will be omitted.

Next, the operation will be described. The image data obtained by the image obtaining means 1 is
Is subjected to resolution conversion, and is input to the image enlargement / reduction / composition means 3. The image enlargement / reduction / combination unit 3 enlarges / reduces / combines the acquired image as described in the first embodiment, and inserts an image pattern for detecting an error on the receiving side from the error detection pattern insertion unit 28. Then, it outputs to the image dividing means 4.

For example, it is assumed that an image synthesized on one screen by the image enlargement / reduction / synthesis unit 3 is divided into six channels by the image division unit 4 and transmitted by the transmission unit 5. The image data received by the receiving means 6 enters the image enlarging means 23 and the image data error detecting means 19 monitors whether the image pattern inserted by the error detecting pattern inserting means matches each channel. .

When the inserted image patterns match in each channel, the image enlarging means 23 and the image data switching means 11 do not perform any processing, pass the image data of each channel as it is, and display the corresponding channel. Output to the means 8 for image display. If they don't match,
The image enlargement unit 23 appropriately enlarges the image data from each channel and the fixed image output unit 12 and outputs the image data to the image data switching unit 11.

For example, if there is an error in CH3, the image data error detecting means 19 outputs an image data error notifying signal 19a to notify the image enlarging means 23 and the image data switching means 11 that there is an error in CH3. . In the image data switching means 11 in response to the image data error notification signal 19a, as an output of CH3, image data of another channel or a fixed signal generated by the image fixed output means 12 (for example, The display image is switched from a blank, a company logo, an image of the singer in the case of a concert or the like, and an image obtained by enlarging those images by the image enlarging means 23, and the image is displayed on the display means 8. The setting of the enlargement ratio of the image data at the time of the error and the pattern setting of the display switching may be performed by adding a memory for storing the pattern, or may be set from an external control terminal or the like.

As described above, according to the fourth embodiment,
The transmission error of the image data of each channel is monitored by the image data error detecting means 19, and when an error is detected, the image data switching means 11 causes the image data of the normal channel among the channels or the image fixed output. A display image can be selected from an image fixed signal such as an image of a blank, a company logo, a talent, and the like generated by the means 12, and a display image can be selected from the enlarged image. However, the display effect of the multi-display can be maintained.

Embodiment 5 FIG. FIG. 5 is a block diagram showing an image display device according to a fifth embodiment of the present invention. In FIG. 5, reference numeral 26 denotes an arbitrary image received by the receiving unit 6 upon receiving an error signal from the image data error detecting unit 19. The image data switching means 1 performs a reduction process on the data.
1 is an image reducing unit for outputting the image data to the image processing unit 1. Other configurations are the same as those in FIG. 1, and the same reference numerals are given and the duplicate description will be omitted.

Next, the operation will be described. The image data obtained by the image obtaining means 1 is
Is subjected to resolution conversion, and is input to the image enlargement / reduction / composition means 3. The image enlargement / reduction / combination unit 3 enlarges / reduces / combines the acquired image as described in the first embodiment, and inserts an image pattern for detecting an error on the receiving side from the error detection pattern insertion unit 28. Then, it outputs to the image dividing means 4.

For example, it is assumed that an image synthesized on one screen by the image enlargement / reduction / synthesis unit 3 is divided into six channels by the image division unit 4 and transmitted by the transmission unit 5. The image data received by the receiving means 6 enters the image reducing means 26, and the image data error detecting means 19 monitors whether the image pattern inserted by the error detecting pattern inserting means 28 matches each channel. I have.

When the inserted image patterns match in each channel, the image reduction means 26 and the image data switching means 11 do not perform any processing, but pass the image data of each channel as it is and display the corresponding channel. Output to the means 8 for image display. If they don't match,
The image reducing unit 26 appropriately reduces the image data from each channel and the fixed image output unit 12 and outputs the image data to the image data switching unit 11.

For example, if there is an error in CH3, the image data error detecting means 19 outputs an image data error notifying signal 19a to the image reducing means 26 and the image data switching means 11 to notify that there is an error in CH3. . In the image data switching means 11 in response to the image data error notification signal 19a, as an output of CH3, image data of another channel or a fixed signal generated by the image fixed output means 12 (for example, a blank or company logo for a presentation or the like) , The image of the singer in the case of a concert, etc.) and the images reduced by the image reducing means 26. Note that the image data reduction ratio setting and the display switching pattern setting at the time of an error may be performed by adding a memory for storing a pattern, or may be set from an external control terminal or the like.

As described above, according to the fifth embodiment,
The transmission error of the image data of each channel is monitored by the image data error detecting means 19, and when the error is detected, the image data switching means 11 causes the image data of the normal channel among the channels or the image fixed output means to be output. The image to be displayed can be selected from the image fixed signals such as blanks, company logos, and talent images generated by step 12 and the reduced image thereof, so that even when an image data transmission error occurs in a certain channel, , The display effect of the multi-display can be maintained.

Embodiment 6 FIG. FIG. 6 is a block diagram showing an image display device according to the sixth embodiment of the present invention. In the figure, reference numeral 27 denotes an arbitrary image received by the receiving unit 6 upon receiving an error signal from the image data error detecting unit 19. This is an image synthesizing unit for performing processing for enlarging / reducing data and synthesizing images from a plurality of channels, and outputting the processed data to the image data switching unit 11. Other configurations are the same as those in FIG. 1, and the same reference numerals are given and the duplicate description will be omitted.

Next, the operation will be described. The image data obtained by the image obtaining means 1 is
Is subjected to resolution conversion, and is input to the image enlargement / reduction / composition means 3. The image enlargement / reduction / combination unit 3 enlarges / reduces / combines the acquired image as described in the first embodiment, and inserts an image pattern for detecting an error on the receiving side from the error detection pattern insertion unit 28. Then, it outputs to the image dividing means 4.

For example, it is assumed that an image synthesized on one screen by the image enlargement / reduction / synthesis unit 3 is divided into six channels by the image division unit 4 and transmitted by the transmission unit 5. The image data received by the receiving means 6 enters the image synthesizing means 27 and the image data error detecting means 19 monitors whether the image pattern inserted by the error detecting pattern inserting means 28 matches each channel. I have.

If the inserted image patterns match in each channel, the image synthesizing means 27 and the image data switching means 11 do not perform any processing, pass the image data of each channel as it is, and display the corresponding channel. Output to the means 8 for image display. If they don't match,
The image synthesizing unit 27 appropriately enlarges and reduces the image from each channel and the fixed image output unit 12, synthesizes the image, and outputs the image to the image data switching unit 11.

For example, if there is an error in CH3, the image data error detecting means 19 outputs an image data error notifying signal 19a to the image synthesizing means 27 and the image data switching means 11 to notify that there is an error in CH3. In the image data switching means 11, the image data switching means 11 outputs another channel image or a fixed signal generated by the image fixed output means 12 (for example, a blank or a company logo for a presentation, etc.) in the image data switching means 11 by the image data error notification signal 19a. In the case of a concert or the like, the image of the singer) and those images are enlarged by the image synthesizing means 27.
The display image is switched from the image obtained by reducing and synthesizing the images of the plurality of channels, and the image is displayed on the display unit 8. The setting of the enlargement ratio / reduction ratio / synthesis pattern at the time of an error and the pattern setting for display switching may be performed by adding a memory for storing a pattern, or may be set from an external control terminal or the like.

As described above, according to the sixth embodiment,
The image data error detecting means 19 monitors the transmission error of the image data of each channel, and when an error is detected, the image data switching means 11 causes the normal channel image data among the channels or the image fixed output means. 12, a display image can be selected from an image fixed signal such as a blank, a company logo, an image of a talent, and the like obtained by enlarging, reducing, and synthesizing images of a plurality of channels. The display effect of the multi-display can be maintained even when an image data transmission error occurs in the channel.

Embodiment 7 FIG. FIG. 7 is a block diagram showing an image display device according to a seventh embodiment of the present invention. In the figure, reference numeral 13 denotes an image signal received from the image data error detecting means 19 and received by the receiving means 6. On the other hand, it is a special effect display control unit that performs control for displaying a special effect using an image that has been subjected to enlargement, reduction, and synthesis processing. Other configurations are the same as those in FIG.
The same reference numerals are given and the duplicate description will be omitted.

Next, the operation will be described. The image data obtained by the image obtaining means 1 is subjected to resolution conversion by an image resolution conversion 2 and is input to the image scaling / combining means 3. The image enlargement / reduction / combination unit 3 enlarges / reduces / combines the acquired image as described in the first embodiment, and inserts an image pattern for detecting an error on the receiving side from the error detection pattern insertion unit 28. Then, it outputs to the image dividing means 4.

For example, it is assumed that an image synthesized on one screen by the image enlargement / reduction / synthesis unit 3 is divided into six channels by the image division unit 4 and transmitted by the transmission unit 5. The image data received by the receiving means 6 enters the image synthesizing means 27 and the image data error detecting means 19 monitors whether the image pattern inserted by the error detecting pattern inserting means 28 matches each channel. I have.

When the inserted image patterns match in each channel, no error is notified from the image data error detecting means 19 to the special effect display control means 13, and the special effect display control means 13 sets the image synthesizing means 27 and the image The data switching means 11 is controlled so as not to perform any processing, the image data of each channel is passed as it is, and the data is output to the display means 8 of the corresponding channel to display the image. If they do not match, the image data error detecting means 1
9 outputs an image data error notification signal 19a to the special effect display control means 13, and the special effect display control means 13 controls the image synthesizing means 27 and the image data switching means 11 to display special effects. Image synthesis means 2
Reference numeral 7 denotes a special effect display control means 13 for appropriately enlarging each channel and an image from the fixed image output means 12,
Image data switching means 11 switches the output of each channel so as to display a special effect, and performs image display on display means 8.

For example, if there is an error in CH3, the image data error detection means 19 outputs an image data error notification signal 19a to the special effect display control means 13,
Notify that channel 3 has an error. Upon receiving the notification, the special effect display control unit 13 stops the original image of the channel 3 and outputs the image data of another channel or the fixed signal (for example, presentation) generated by the image fixed output unit 12 as the output of the channel 3. And the like, and a concert or the like, an image of the singer) and the images are controlled by the image synthesizing means 27 to perform processes such as enlargement / reduction and image synthesis of a plurality of channels. Then, the display image is selected from the processed images, and the switching of the image data switching unit 11 is controlled so as to perform a special effect display such as a wipe, a fade, a dissolve, or a change of the display channel as needed. The image subjected to the display effect is passed to the respective display means 8, and the image is displayed. In addition, the pattern setting of the special effect display at the time of an error may be performed by adding a memory for storing a pattern, or may be set from an external control terminal or the like.

As described above, according to the seventh embodiment,
The transmission error of the image data of each channel is monitored by the image data error detecting means 19, and when an error is detected, the special effect display control means 13 controls the image data of the normal channel among the channels or the image fixing. Using the image fixed signals such as blanks, company logos, and talent images generated by the output unit 12 and images obtained by enlarging or reducing them and synthesizing images of a plurality of channels, an image is displayed while performing special effect display. Since display can be performed, the display effect of the multi-display can be maintained even when an image data transmission error occurs in a certain channel.

Embodiment 8 FIG. FIG. 8 is a configuration diagram of a synchronization signal error detection unit according to the eighth embodiment. In the figure, reference numeral 14 denotes a period obtaining unit for obtaining the period of the synchronization signal of each channel, 15 denotes a synchronization signal comparing unit for comparing the synchronization signals of the respective channels, and 16 denotes an error when a synchronization error occurs. A synchronization error CH storage means 17 for storing the channel is a synchronization error notification means for notifying the synchronization signal error to the outside when the comparison result does not match by the synchronization signal comparison means 15.

Next, the operation will be described. First, the synchronization signal from the receiving means 6 is sampled by the cycle acquisition means 14 in the synchronization signal error detection means 9, and the cycle of the synchronization signal of each channel is acquired. Synchronization signal comparison means 15
Then, the period of the synchronization signal of each sampled channel is compared, and it is confirmed whether the synchronization signal of each channel is identical. In the synchronizing signal comparing means 15, when comparing the synchronizing signals, first, the vertical synchronizing signal (VSYN
The comparison is made from C). As a result of sampling the VSYNC signal of each channel and comparing the timings, if they do not match, an error is notified to the synchronization error notifying means 17. If they match, the horizontal synchronization signal (HSYNC) is compared next. In the method of comparing HSYNCs, the number of HSYNCs in each channel is counted using the VSYNC determined to be normal as a reset pulse, and the count values are compared to detect a synchronization deviation of a horizontal line. If the result of the comparison does not match, an error is notified to the synchronization error notifying means 17 in the same manner as described above.

If they match, the next HSYN determined to be normal
The pixel clock of each channel is counted using C as a reset pulse. By comparing the count values, a pixel shift in a pixel unit in the horizontal line is detected. If they do not match, an error is notified to the synchronization error notifying means 17 as before. For example, when there are six channels, it is assumed that the CH3 synchronization signal is different from the other five channels as a result of the comparison. The synchronization signal comparison circuit notifies the synchronization error notification means 17 of the error of the CH3 synchronization signal. The synchronization error notification unit 17 stores the error channel in the synchronization error CH storage unit 16 and notifies the outside of the synchronization error. The operation in the external circuit is described in Examples 1 to 7.
Therefore, the explanation is omitted.

As described above, according to the eighth embodiment,
Since error detection is performed using a synchronization signal, there is no need to add a new error detection signal or its processing circuit.
Further, since error detection and display switching are performed only on the receiving side, the hardware scale can be reduced. Further, even when an image data transmission error occurs in a certain channel, the display effect of the multi-display can be maintained.

Embodiment 9 FIG. FIG. 9 is a configuration diagram of the image data error detection means 19 according to the ninth embodiment. In the figure, reference numeral 20 denotes a common area image acquiring unit for acquiring an image of a common area from image data of each channel, and 21 denotes a common area image acquired by the common area image acquiring unit 20 or a previous image and an acquired image. Common area comparing means for comparing the images of the frames; 22 is a common area storing means for storing the images of the common areas of the previous frame;
Is an image data error notifying means for notifying an image data error to the outside when the comparison result from the common area comparing means 21 does not match, and 24 is an image for storing a channel in which the image data error has occurred. Data error C
H storage means.

Next, the operation will be described. The image data obtained by the image obtaining means 1 is subjected to resolution conversion by an image resolution conversion 2 and is input to the image scaling / combining means 3. The image enlargement / reduction / combination unit 3 enlarges / reduces / combines the acquired image as described in the first embodiment, and inserts an image pattern for detecting an error on the receiving side from the error detection pattern insertion unit 28. Then, it outputs to the image dividing means 4. The error detection pattern insertion means 28 inserts an image of a common area of each channel as an image pattern to be inserted. The image dividing means 4 sets a divided area larger than the display area in a screen division when an image enlarged on one screen or a high-resolution image is displayed on a multi-display, so that adjacent screens on the left, right, top and bottom can be separated. The image data is divided into each channel as image data including an image pattern of a common area, and is output to the transmission unit 5. The image data is transmitted from the transmitting means 5 to the receiving means 6. The common area image pattern among the image data from the receiving means 6 is input to the common area image acquiring means 20 in the image data error detecting means 19. When the image pattern of the common area of each channel is obtained, the common area comparison means 21 compares the image data of the common area of each channel and confirms whether the image data of the common area of each channel matches. As an example, when there are six channels, it is assumed that the comparison result of the common area image of the CH3 image data is different from the other five channels. The common area comparison means notifies the image data error notification means 25 of an error in the CH3 common area image data. Image data error notification means 25
Then, the error channel is stored in the image data error CH storage means 24, and the image data error notification signal 19a is output to the outside. The operation in the external circuit is described in Examples 1 to 7.
Therefore, the explanation is omitted.

As described above, according to the ninth embodiment,
Since error detection is performed using image data in the common area between channels, it is necessary to newly generate an error detection image pattern when displaying an enlarged image or a high-resolution image on one screen. It is sufficient to transmit the image of each channel in an overlapping manner, and it is not necessary to add a new signal for error detection and a processing circuit for it. Error detection and display switching are performed only on the receiving side, so the hardware scale is reduced. Can be smaller. Further, even when an image data transmission error occurs in a certain channel, the display effect of the multi-display can be maintained.

[0066]

As described above, in the image display device according to the first aspect of the present invention, the synchronizing signal generating means for generating the synchronizing signal of the image data displayed on each of the plurality of display screens, A synchronization signal error detection unit that detects an error of the synchronization signal based on each of the synchronization signals, a synchronization signal switching unit that switches a synchronization signal in which an error is detected by the synchronization signal error detection unit to another normal synchronization signal, With a plurality of image display means for displaying an image on each display screen based on a normal synchronization signal,
The transmission error of the synchronization signal of the image data of each display screen can be monitored, and even if an error of the synchronization signal occurs on one display screen, it is switched to a normal synchronization signal of another display screen.
There is an effect that image data can be displayed normally and the display effect of the multi-display can be maintained.

According to a second aspect of the present invention, in the image display apparatus of the first aspect, there is provided an error detection pattern insertion means for inserting an image pattern for detecting a transmission error. Image data error detecting means for detecting a transmission error of image data, and display image switching means for switching image data in which an image data transmission error is detected by the image data error detecting means to image data of another display screen. Therefore, the transmission error of the image data of each display screen can be monitored, and even when the transmission error of the image data of one display screen occurs, the normal image data of another display screen can be selected and displayed on the display screen. This has the effect of maintaining the display effect of the multi-display.

According to a third aspect of the present invention, in the image display apparatus according to any one of the first and second aspects, when an image data transmission error is detected, With the image fixed output means for outputting fixed image data as image data, the transmission error of the image data of each display screen can be monitored. Selectable from normal image data on the display screen or fixed image data such as blanks or company logos generated by the image fixed output means, and can be displayed on the display screen, thereby maintaining the display effect of the multi-display. There is.

According to a fourth aspect of the present invention, in the image display apparatus according to any one of the first to third aspects, when an image data transmission error is detected, An image enlarging means for enlarging image data of another display screen can be provided, so that transmission errors of image data of each display screen can be monitored. It is possible to select from normal image data of the screen, fixed image data such as blanks and company logos generated by the image fixed output means, and enlarged image data, and display them on the display screen. There is an effect that the display effect can be maintained.

According to a fifth aspect of the present invention, in the image display device according to any one of the first to fourth aspects, when an image data transmission error is detected, An image reduction means for reducing image data of another display screen can be provided, so that transmission errors of image data of each display screen can be monitored. It is possible to select from normal image data of the screen, fixed image data such as blanks and company logos generated by the image fixed output means, and reduced image data, and display them on the display screen. There is an effect that the display effect can be maintained.

According to a sixth aspect of the present invention, in the image display device according to any one of the first to fifth aspects, when an image data transmission error is detected, An image synthesizing unit for scaling and synthesizing the image data of the other display screens and the image data from the image fixed output unit is provided, so that transmission error of the image data of each display screen can be monitored. Even if an image data transmission error occurs, normal image data on other display screens and fixed image data such as blanks and company logos generated by the image fixed output means, as well as enlargement, reduction, and multiple display screens The image data obtained by synthesizing the image data can be selected and displayed on the display screen, and the display effect of the multi-display can be maintained.

According to a seventh aspect of the present invention, in the image display apparatus according to any one of the first to sixth aspects, when an image data transmission error is detected, Special effect display control means for displaying a special effect on the screen using image data other than the display screen on which the error is detected, so that transmission error of image data of each display screen can be monitored, Even if an image data transmission error occurs, normal image data on other display screens and fixed image data such as blanks and company logos generated by the image fixed output means, as well as enlargement, reduction, and multiple display screens Can be displayed on the display screen while performing special effect display using the image data obtained by synthesizing the image data of the multi-display, and the display effect of the multi-display can be maintained. There is a result.

In the image display apparatus according to the present invention, in the image display apparatus according to any one of the first to seventh aspects, the synchronizing signal error detecting means may include:
By monitoring the synchronization signal on each display screen, errors in the synchronization signal are detected, so there is no need to add a new error detection signal or its processing circuit. Since the display switching is performed, the hardware scale can be reduced, and the display effect of the multi-display can be maintained even when an image data transmission error on a certain display screen occurs.

In the image display device according to the ninth aspect of the present invention, in the image display device according to any one of the first to seventh aspects, the image data error detecting means comprises: Since the transmission error of the image data is detected by inserting the common area image and comparing the pattern of the area, when displaying an enlarged image or a high-resolution image on one screen, the error detection error is detected. There is no need to generate a new image pattern, it is sufficient to transmit the images of each channel in an overlapping manner, and there is no need to add a new error detection signal or its processing circuit. Since the display is switched, the hardware scale can be reduced, and even if an image data transmission error on a certain display screen occurs, the display effect of the multi-display can be obtained. There is an effect that can be maintained. As described above, according to the image display device of the invention described in each claim of the present invention, transmission errors of each of the divided synchronization signals and image data are monitored, and when an error occurs, a channel to be displayed is automatically switched. Since the display is performed while changing the content and display effect of the image to be displayed, it is not necessary to constantly monitor with a monitor, and it is possible to continue the demonstration and the presentation without lowering the display effect by the multi-display.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an image display device according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of an image display device according to a second embodiment of the present invention.

FIG. 3 is a configuration diagram of an image display device according to a third embodiment of the present invention.

FIG. 4 is a configuration diagram of an image display device according to a fourth embodiment of the present invention.

FIG. 5 is a configuration diagram of an image display device according to a fifth embodiment of the present invention.

FIG. 6 is a configuration diagram of an image display device according to a sixth embodiment of the present invention.

FIG. 7 is a configuration diagram of an image display device according to a seventh embodiment of the present invention.

FIG. 8 is a detailed configuration diagram of a synchronization signal error detection unit according to the first to seventh embodiments of the present invention.

FIG. 9 is a detailed configuration diagram of an image data error detection unit according to the first to seventh embodiments of the present invention.

FIG. 10 is a configuration diagram of a conventional image display device.

[Explanation of symbols]

1 input image acquisition means, 2 image resolution conversion means, 3
Image enlargement / reduction combining means, 4 image dividing means, 5 transmitting means, 5a to 5f Each element of the transmitting means 5, 5ad to 5fd
A transmission signal of each channel, 6 is a receiving means, 6a to 6f each element of the receiving means 6, 6ai to 6fi, an image data signal of each channel, 6as to 6fs, a synchronizing signal of each channel, 7 a synchronizing signal generating means, 7s synchronizing signal, 8 image display means, 8a to 8f constituent elements of image display means, 9 synchronization signal error detection means, 10 synchronization signal switching means, 1
0s Switching synchronization signal, 11 image data switching means,
12 fixed image output means, 13 special effect display control means, 14 cycle acquisition means, 15 synchronization signal comparison means, 1
6 synchronization error CH storage means, 17 synchronization error notification means, 17a synchronization error notification signal, 18 synchronization signal distribution means, 19 image data error detection means, 19a image data error notification signal, 20 common area image acquisition means,
21 common area comparison means, 22 common area storage means, 2
3 image reduction means, 24 image data error CH storage means, 25 image data error notification means, 26 image reduction means, 27 image synthesis means, 28 error detection pattern insertion means.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/262 G09G 5/36 520F 5/66 520G 520L F-term (Reference) 5C023 AA02 AA14 AA18 AA27 AA38 BA01 BA09 BA11 BA15 CA03 CA06 CA08 EA02 EA03 EA16 5C058 BA18 BA21 BA23 BA24 BA25 BB17 5C082 AA02 AA03 AA34 BA02 BA12 BC03 BD07 CA33 CA34 CA56 CA76 CA85 CB01 DA51 MM01 MM10

Claims (9)

[Claims] 1. An image display device for displaying image data on each of a plurality of display screens, wherein: a synchronizing signal generating means for generating a synchronizing signal of image data displayed on each of the plurality of display screens; Synchronization signal error detection means for detecting an error in the synchronization signal based on the synchronization signal; synchronization signal switching means for switching a synchronization signal in which an error has been detected by the synchronization signal error detection means to another normal synchronization signal; and the normal synchronization signal. An image display device comprising: a plurality of image display means for displaying an image on each display screen based on the above. 2. An image processing apparatus comprising: an error detection pattern insertion unit for inserting an image pattern for detecting an image data transmission error; an image data error detection unit for detecting an image data transmission error; and an image data error detection unit. 2. The image display device according to claim 1, further comprising: display image switching means for switching image data in which a transmission error is detected to image data of another display screen. 3. An image fixed output means for outputting fixed image data as image data when a transmission error of the image data is detected. An image display device according to claim 1. 4. The image processing apparatus according to claim 1, further comprising an image enlarging means for enlarging the image data of another display screen when a transmission error of the image data is detected. The image display device as described in the above. 5. The image processing apparatus according to claim 1, further comprising an image reducing unit configured to reduce image data of another display screen when an image data transmission error is detected. The image display device as described in the above. 6. An image synthesizing means for enlarging and reducing the image data of another display screen and the image data from the image fixed output means and synthesizing the image data when an image data transmission error is detected. The image display device according to claim 1, wherein: 7. A special effect display control means for displaying a special effect display on a screen using image data other than the display screen on which the error is detected when a transmission error of the image data is detected. The image display device according to any one of claims 1 to 6, characterized in that: 8. The synchronizing signal error detecting means according to claim 1, wherein the synchronizing signal transmission error is detected by monitoring the synchronizing signal of each display screen. Image display device. 9. The apparatus according to claim 1, wherein the image data error detecting means detects a transmission error of the image data by inserting a common area image of each display screen and comparing the image pattern of the area. The image display device according to claim 7.