JP6598726B2 - Display terminal device, display device, data processing method, and data processing program - Google Patents

Description

  The present invention relates to a technique for controlling the timing of outputting display data to a display device.

Hereinafter, as shown in FIG. 1, a multi-screen content display system in which a plurality of display devices are arranged adjacent to each other in a tile shape to constitute one large screen will be described.
In the multi-screen content display system, a display terminal device is connected to the display device. The display terminal device may be connected to the display device at a one-to-one ratio, or may be connected to one display device per p devices (p is 2 or more). The display terminal device outputs the display data to the connection destination display device. The display data output from the display terminal device is, for example, data constituting content (still images / moving images / characters).
On a screen composed of a plurality of display devices, one content may be displayed, or a plurality of contents may be displayed simultaneously by dividing a display area.
The display terminal device is connected to the control server device. The control server device controls each display terminal device.

In this multi-screen content display system, since each display terminal device operates independently, there is a problem that a display synchronization problem occurs in which display for each display terminal device is shifted. Patent Document 1 discloses a technique for solving this display synchronization problem.
However, the problem shown in FIG. 12A occurs between the display devices arranged in the vertical direction. In FIG. 12A, a phenomenon in which the display data displayed on the display device 32 arranged in the upper stage is visually shifted by one frame with respect to the display data displayed on the display device 31 arranged in the lower stage. Is shown. The timing at which the display terminal device 22 connected to the display device 32 outputs display data to the display device 32 and the timing at which the display terminal device 21 connected to the display device 31 outputs display data to the display terminal device 22 are synchronized. However, the display data may appear to be shifted by one frame between the display device 32 and the display device 31.
As shown in FIG. 12B, in the case of a currently general display device, the screen is constantly updated at a specified update interval. Strictly speaking, one cycle per update interval is displayed on the screen of the display device. The image is scanned and updated in order from the uppermost line to the lowermost line. For this reason, when moving content connected between display devices stacked vertically is displayed, there is a problem that the lower display of the upper display device and the upper display of the lower display device are always visually shifted by one frame. .
A more specific description will be given with reference to FIG. In FIG. 12B, the horizontal axis indicates the time transition. The vertical axis indicates the position of the scanning line in the display device. That is, the upper end of the stage of the display device 32 (portion indicated by reference numeral 320a) indicates the upper end of the scanning line of the display device 32, and the lower end of the stage of the display device 32 (portion indicated by reference numeral 320b) scans the display device 32. Indicates the bottom of the line. Further, the upper end of the stage of the display device 31 (the part indicated by reference numeral 310a) indicates the upper end of the scanning line of the display apparatus 31, and the lower end of the stage of the display apparatus 31 (the part indicated by reference numeral 310b) scans the display apparatus 31. Indicates the bottom of the line. Further, in the stage of the display device 32 and the stage of the display device 31, the same hatched portion represents display data for one frame that is simultaneously displayed on the display device 32 and the display device 31. For example, a portion indicated by reference numeral 321 and a portion indicated by reference numeral 311 are display data for one frame that is simultaneously displayed on the display device 32 and the display device 31.
In the display device 32 and the display device 31, scanning of the upper end (reference numeral 320a) of the scanning line of the display device 32 of the display data 321, and scanning of the upper end (reference numeral 310a) of the scanning line of the display device 31 of the display data 311. Are started at the same time. Since the scanning of the upper end (reference numeral 310a) of the scanning line is performed by the display apparatus 31 before the lower end of the scanning line (reference numeral 320b) is scanned by the display device 32, the reference numeral 311 is compared with the display data of the reference numeral 321. Display data may appear to be displayed with a delay of one frame.
FIG. 12B shows only the display on the display device 32 and the display device 31, but the same phenomenon occurs in the display device 33 and the display device 34.

One method for solving the problems shown in FIGS. 12A and 12B is to display the display data of the lower display device with a delay of one frame compared to the upper display. In Patent Document 2, the display terminal device generates a synchronization signal based on the delay time calculated from the number of screens of all the display devices in the vertical direction and the position of the responsible display device, and displays the display image with a delay, as shown in FIG. As shown in (c) and (d), this phenomenon is eliminated.
That is, as shown in FIG. 12D, after the display device 32 scans the lower end (reference numeral 320b) of the scanning line, the display device 31 performs the upper end scanning (reference numeral 310a). Therefore, the phenomenon that the display data indicated by reference numeral 321 and the display data indicated by reference numeral 311 appear to be shifted is eliminated.

Japanese Patent No. 5717594 International Publication No. WO2015 / 083269

The technique of Patent Document 2, that is, the method of displaying the display data displayed on the lower display device with a delay of one frame, is to display content in which an object straddling the screen moves in a direction parallel to the scanning line. It is effective.
However, when the display content changes greatly on the entire screen, especially when the main color changes significantly, the screen is shifted from top to bottom over q times the display device screen update interval (q is the number of stages of the display device). Since it is updated, there is a problem that the switching is conspicuous visually.
That is, until the display of the image composed of the display data denoted by reference numeral 322 and the display data denoted by reference numeral 312 is completed, the method of FIG. 12D requires twice as much time as the method of FIG. Cost. For this reason, when the display contents greatly change from the image composed of the display data denoted by reference numeral 321 and the display data denoted by reference numeral 311 to the image composed of the display data denoted by reference numeral 322 and the display data denoted by reference numeral 312, the display is visually switched. stand out.

  In view of the above, the main object of the present invention is to solve the above-described problems and to realize a configuration capable of displaying display data on a display device at an appropriate timing.

The display terminal device according to the present invention is
A display terminal device connected to the display device,
Whether display data to be output to the display device is output to the display device at a specified output timing that is an output timing specified in the display data, or is output to the display device with a delay from the specified output timing An output control unit for determining;
When the output control unit determines that the display data is to be output to the display device at the specified output timing, the display data is output to the display device at the specified output timing, and the display data is output by the output control unit. And an output unit that outputs the display data to the display device with a delay from the designated output timing when it is determined to output the display data to the display device with a delay from the designated output timing.

  According to the present invention, display data is displayed on a display device at an appropriate timing in order to determine whether display data is output to the display device at a specified output timing or delayed from the specified output timing. be able to.

1 is a diagram illustrating an example of a system configuration of a multi-screen content display system according to Embodiment 1. FIG. The figure which shows the hardware structural example of the control server apparatus which concerns on Embodiment 1, and a display terminal device. FIG. 3 is a diagram illustrating a functional configuration example of a control server device and a display terminal device according to the first embodiment. FIG. 3 is a flowchart showing a processing procedure of control command transmission processing of the control server device according to the first embodiment. FIG. 3 is a flowchart showing a processing procedure of control command reception processing of the display terminal device according to the first embodiment. FIG. 4 is a flowchart showing a processing procedure of content reproduction processing of the display terminal device according to the first embodiment. FIG. 6 is a flowchart showing a processing procedure of content reproduction processing of a display terminal device according to Embodiment 2. FIG. 10 is a diagram showing a system configuration example of a multi-screen content display system according to Embodiment 3. FIG. 10 is a diagram illustrating a functional configuration example of a display terminal device according to Embodiment 3; FIG. 9 is a flowchart showing a processing procedure of a delay time calculation process of the display terminal device according to the third embodiment. FIG. 10 is a diagram illustrating a functional configuration example of a display terminal device according to Embodiment 3; The figure which shows the display mode in the conventional multi-screen content display system.

In the following, for ease of explanation, a case where display devices that display an image so as to scan a horizontal line vertically are arranged in the vertical direction will be described as an example. However, for example, when the same display device is rotated 90 degrees in the same direction and arranged in the horizontal direction, the same problem as described above occurs.
In that case, “vertical” in the following description is “horizontal”, “horizontal” is “vertical”, “upper” and “lower” are “left” and “right” (when rotated 90 degrees clockwise) "Right" and "left").

Embodiment 1 FIG.
*** Explanation of configuration ***
FIG. 1 shows a system configuration example of a multi-screen content display system according to the present embodiment.
In the present embodiment, as an example of the configuration of the multi-screen content display system, a description will be given using a four-screen configuration of two horizontal rows and two vertical rows. However, as long as there are one or more rows in the horizontal direction and two or more rows in the vertical direction, the number of display devices and display terminal devices is not limited to four as well as the arrangement shown in FIG. Further, the screen layout is not limited to a grid.
However, a plurality of display devices need to be arranged adjacent to each other.

The control server device 10 is a computer that controls the multi-screen content display system.
Display terminal devices 21, 22, 23, and 24 are connected to the control server device 10.
The display terminal devices 21, 22, 23, and 24 are computers.
A display device 31 is connected to the display terminal device 21. A display device 32 is connected to the display terminal device 22. A display device 33 is connected to the display terminal device 23, and a display device 34 is connected to the display terminal device 24.
The display devices 31, 32, 33, and 34 are display devices, respectively.
In the multi-screen content display system according to the present embodiment, each of the display devices 31, 32, 33, and 34 displays an image of its own assigned area to constitute one screen.
The display terminal devices 21, 22, 23, and 24 receive a control command from the control server device 10, and based on the received control command, control the output timing of the display data output to the display devices connected thereto.
In the following, the display terminal device 21 will be described on behalf of the display terminal devices 21, 22, 23, and 24. However, the following description of the display terminal device 21 is also applied to the display terminal devices 22, 23, and 24. Applicable. That is, “display terminal device 21” in the following description can be read as “display terminal device 22”, “display terminal device 23”, and “display terminal device 24”. In the following, the display device 31 will be described on behalf of the display devices 31, 32, 33, and 34. However, the following description of the display device 31 also applies to the display devices 32, 33, and 34. That is, “display device 31” in the following description can be read as “display device 32”, “display device 32”, “display device 33”, and “display device 34”.
The display data is data for one frame (data of reference numerals 321, 322, 311, 312, etc.) shown in FIGS. 12 (b) and 12 (d). Display data is also referred to as a display image or an image.
Also, as shown in FIG. 12B, the content is composed of a plurality of display data associated with each other. For example, the content is a moving image composed of a set of images. The display terminal device 21 continuously outputs a plurality of display data constituting the content to the display device 31.

  FIG. 2 shows a hardware configuration example of the control server device 10 and the display terminal device 21 according to the present embodiment.

The control server device 10 includes a processor 71, a memory 72, a storage device 73, and a communication interface 74.
The storage device 73 stores a program for realizing the functions of the control command transmission unit 101 and the inter-screen synchronization processing unit 102 shown in FIG.
These programs are loaded into the memory 72, and the processor 71 executes these programs to perform operations of a control command transmission unit 101 and an inter-screen synchronization processing unit 102 described later.
The communication interface 74 communicates with the display terminal device 21.

The display terminal device 21 includes a processor 81, a memory 82, a graphics processor 83, a storage device 84, a communication interface 85, and a display interface 86.
The storage device 84 includes functions of the control command receiving unit 211, the control command expanding unit 212, the frame output delay time calculating unit 213, the screen update instruction unit 214, the image generation display unit 215, and the inter-screen synchronization processing unit 216 shown in FIG. A program for realizing is stored.
Then, these programs are loaded into the memory 82, and the processor 81 executes these programs, and a control command receiving unit 211, a control command expanding unit 212, a frame output delay time calculating unit 213, a screen update instruction unit 214, and an image, which will be described later, The generation display unit 215 and the inter-screen synchronization processing unit 216 are operated.
Note that some of the operations of the control command reception unit 211, the control command expansion unit 212, the frame output delay time calculation unit 213, the screen update instruction unit 214, the image generation display unit 215, and the inter-screen synchronization processing unit 216 are graphics. The processor 83 may perform this.
The communication interface 85 communicates with the control server device 10.
The display interface 86 outputs display data to the display device 31.

  The hardware configuration in FIG. 2 is an example, and the control server device 10 and the display terminal device 21 may have a hardware configuration other than the hardware configuration in FIG. For example, some of the control command reception unit 211, the control command expansion unit 212, the frame output delay time calculation unit 213, the screen update instruction unit 214, the image generation display unit 215, and the inter-screen synchronization processing unit 216 in FIG. It may be realized by a dedicated processor different from 81. Further, the processor 81 may serve as the graphics processor 83. In addition to the memory 82, a video memory may be provided.

  In the present embodiment, content data (including still image files, moving image files, or layout information in content for combining a plurality of them as one content) is displayed in the storage device 84 of the display terminal device 21. It is assumed that the arrangement information of the device 31, the resolution of the display device 31, and the like are stored.

  FIG. 3 shows a functional configuration example of the control server device 10 and the display terminal device 21 according to the present embodiment.

  The control server device 10 includes a control command transmission unit 101 and an inter-screen synchronization processing unit 102.

The display terminal device 21 includes a control command reception unit 211, a control command expansion unit 212, a frame output delay time calculation unit 213, a screen update instruction unit 214, an image generation display unit 215, and an inter-screen synchronization processing unit 216.
The display terminal devices 22, 23, and 24 also have the same functional configuration as the display terminal device 21.
Although not shown, the display terminal device 22 includes a control command reception unit 221, a control command expansion unit 222, a frame output delay time calculation unit 223, a screen update instruction unit 224, an image generation display unit 225, and inter-screen synchronization processing. It is assumed that the unit 226 is provided.
Further, the display terminal device 23 includes a control command receiving unit 231, a control command expanding unit 232, a frame output delay time calculating unit 233, a screen update instruction unit 234, an image generation display unit 235, and an inter-screen synchronization processing unit 236. To do.
In addition, the display terminal device 24 includes a control command receiving unit 241, a control command expanding unit 242, a frame output delay time calculating unit 243, a screen update instruction unit 244, an image generation display unit 245, and an inter-screen synchronization processing unit 246. To do.
Hereinafter, the functional configuration of the display terminal device 21 will be described, but the following description also applies to the functional configuration of the display terminal devices 22, 23, and 24.

The control command transmission unit 101 generates a control command and transmits the control command to the display terminal device 21 via the communication interface 74.
The control command includes content information and timing information. The content information is identification information of designated content, and includes a content name, content data, and the like. The timing information is information for starting playback of specified content at a specified timing, and includes scheduled playback start time and frame output delay processing adoption information. The frame output delay process acceptance / rejection information is flag information indicating whether or not to perform the frame output delay process.
The frame output delay processing is processing for delaying the timing at which the lower display device displays an image by one frame relative to the timing at which the upper display device displays an image.
In the present embodiment, frame output delay process adoption information is specified for each content.

  The control command receiving unit 211 receives the control command transmitted from the control command transmitting unit 101 via the communication interface 85.

  The control command expanding unit 212 extracts timing information and content information from the control command received by the control command receiving unit 211.

The frame output delay time calculation unit 213 refers to the frame output delay process acceptance / rejection information in the timing information obtained from the control instruction expansion unit 212 and determines whether or not to perform the frame output delay process. In the present embodiment, the frame output delay time calculation unit 213 displays the display data at the beginning of the content at the scheduled playback start time (example of designated output timing) that is the output timing specified in the top display data. It is determined whether to output to the device 31 or to output to the display device 31 with a delay from the scheduled reproduction start time.
In addition, when the frame output delay time calculation unit 213 determines to output the first display data to the display device 31 after being delayed from the reproduction start scheduled time, the frame output delay time calculation unit 213 sets a frame output delay time that is a delay time from the reproduction start scheduled time. calculate. Hereinafter, the frame output delay time is also simply referred to as delay time.
The frame output delay time calculation unit 213 corresponds to an example of an output control unit. The processing performed by the frame output delay time calculation unit 213 corresponds to an example of an output control step.

  The screen update instruction unit 214 detects the vertical synchronization signal and gives an instruction to generate the display data of the next frame to the image generation display unit 215.

In response to an instruction from the screen update instruction unit 214, the image generation / display unit 215 determines display data to be displayed in the next frame from content information obtained from the control instruction expansion unit 212, and generates display data (image). . Then, the image generation display unit 215 outputs the generated display data to the display device 31 via the display interface 86.
When the frame output delay time calculation unit 213 determines that the display data is to be output to the display device 31 by the frame output delay time calculation unit 213, the image generation display unit 215 outputs the display data to the display device 31 at the scheduled playback start time. To do. On the other hand, when the frame output delay time calculation unit 213 determines that the display data is delayed from the scheduled reproduction start time and output to the display device 31, the image generation display unit 215 delays the display data from the scheduled reproduction start time. The data is output to the display device 31 after being delayed by a minute.
When the image generation / display unit 215 outputs the display data to the display device 31 without delay, the display data is displayed on the display device 31 as shown in FIGS. On the other hand, when the image generation display unit 215 delays the delay time and outputs the display data to the display device 31, the display data is displayed on the display device 31 as shown in FIGS.
The image generation / display unit 215 corresponds to an example of an output unit. The processing performed by the image generation / display unit 215 corresponds to an example of an output step.

  The inter-screen synchronization processing unit 102 and the inter-screen synchronization processing unit 216 perform processing for causing the screen update instruction unit 214 and the image generation / display unit 215 to recognize the same vertical synchronization signal. Any of general processes can be used as the process for recognizing the same vertical synchronizing signal. For example, in order to synchronize the time and vertical synchronization signal with all display terminal devices with reference to the control server device 10, and to use the time of the control server device 10 and the count of the vertical synchronization signal as the scheduled reproduction start time used in the control command, For example, the control command transmission unit 101 may be given time.

*** Explanation of operation ***
Next, a detailed processing procedure of the multi-screen content display system according to the present embodiment will be described with reference to FIGS. 4, 5, and 6.

FIG. 4 is a flowchart showing a processing procedure of control command transmission processing in the control server device 10. Initially, with reference to FIG. 4, the process sequence of the control command transmission process in the control server apparatus 10 is demonstrated.
The control command transmission process shown in FIG. 4 is performed on a content basis.

In step ST1, the control command transmission unit 101 generates a control command. More specifically, the control command transmission unit 101 acquires content information of the specified content (information specifying content data stored on the storage device of the display terminal device). Further, the command transmission unit 101 acquires the scheduled playback start time, which is the scheduled playback start time of the content, and the frame output delay process acceptance / rejection information indicating whether or not to perform the frame output delay process. Then, the control command transmission unit 101 generates a control command by combining these pieces of information.
As described above, the frame output delay processing adoption information is flag information for determining whether or not to apply the frame output delay processing.
For example, when the content is a still image, there is no movement, so the frame output delay process is not applied. On the other hand, when the content is a moving image, frame output delay processing may be applied. Even in the case of a moving image, a case where the movement in the horizontal direction is fast is particularly noticeable in the shift between the screens in the vertical direction. These settings may be made manually, or the control command transmission unit 101 may automatically analyze the contents of the content data. If it is the speed of motion of a moving image, it can be set by performing threshold processing on the length of the largest motion vector using a general motion vector generation method.
Further, whether or not to adopt the frame output delay process for the content information, the scheduled reproduction start time, and the designated content may be designated by the user using the input device on the operation screen displayed on the display device of the control server device 10. Moreover, you may specify based on a predetermined schedule.

In step ST2, the control command transmitting unit 101 transmits the control command generated in step ST1 to the control command receiving units 211, 221, 231, and 241 of the display terminal devices 21, 22, 23, and 24 via the communication interface 74. Send.
This completes the control command transmission process in the control server device 10.

  FIG. 5 is a flowchart showing a processing procedure of control command reception processing in the display terminal devices 21, 22, 23, and 24. Below, although the process in the display terminal device 21 is demonstrated, the same process is performed also in the display terminal devices 22, 23, and 24.

In step ST3, the control command receiving unit 211 receives the control command transmitted from the control command transmitting unit 101 via the communication interface 85.
In ST4, the control command expanding unit 212 analyzes the control command received by the control command receiving unit 211, and extracts timing information (scheduled start time of reproduction and frame output delay processing adoption information) and content information. In addition, the control instruction expansion unit 212 passes the extracted timing information and content information to the image generation display unit 215 and the frame output delay time calculation unit 213.
This completes the control command reception process in the display terminal device 21.

  FIG. 6 is a flowchart showing a processing procedure of content reproduction processing in the display terminal devices 21, 22, 23, and 24. Below, although the process in the display terminal device 21 is demonstrated, the same process is performed also in the display terminal devices 22, 23, and 24. Note that the processing procedure shown in FIG. 6 corresponds to an example of a data processing method and a data processing program.

In step ST6, the screen update instruction unit 214 detects the vertical synchronization signal, and notifies the image generation display unit 215 of the detection of the vertical synchronization signal.
In step ST7, the image generation display unit 215 determines whether there is new content information and timing information regarding the content to be reproduced next.
If it exists, step ST8 is executed, and if it does not exist, step ST11 is executed.
In this embodiment, it is assumed that the control command expansion unit 212 or the image generation display unit 215 has a command buffer. In step ST4, the control instruction expansion unit 212 writes content information and timing information in the command buffer. In step ST7, the image generation display unit 215 acquires content information and timing information from the command buffer. Then, the image generation display unit 215 determines whether the acquired timing information is updated. Further, the image generation / display unit 215 always deletes the content information and timing information after acquiring the content information and timing information from the command buffer, and determines whether or not the content information and timing information have been acquired in step ST7. You may go.

In step ST8, the frame output delay time calculation unit 213 determines whether or not to apply the frame output delay process from the timing information.
Specifically, the frame output delay time calculation unit 213 determines whether or not to apply the frame output delay processing with reference to the frame output delay processing adoption information included in the timing information.
If the frame output delay process is applied, step ST9 is executed. If the frame output delay process is not applied, step ST10 is executed.
In principle, the frame output delay process is performed on the first display data of the display data included in the content, but the frame output delay process may be performed on the display data at an arbitrary position. For example, frame output delay processing may be performed on the second display data. The frame output delay processing adoption information specifies which frame display data is subjected to frame output delay processing. When the content is switched, the display image of the new content and the display image of the previous content are often very different, but if the frame output delay process is performed on the second display data, the content The problem that the switching of is conspicuous can be solved.
Hereinafter, a case where the frame output delay process is performed on the first display data of the content will be described.

In step ST9, the frame output delay time calculation unit 213 calculates a frame output delay time to be applied to the scheduled reproduction start time for the next content.
The frame output delay time calculation unit 213 is, for example, in the case where the number N of display devices in the vertical direction in the multi-screen content display system, the number n of display devices in charge of each display terminal device, and the display device configuration is two stages. It can be obtained from the frame output delay time Δd of the display device one stage below. For example, when playback of the central display device is started at a specified time, the frame output delay time d (n) of the n-th display device S (n) can be obtained by the following equation (1).

  Alternatively, the frame output delay time calculation unit 213 can also calculate the frame output delay time d (n) from the content display area on the screen (that is, the content layout). In this case, for example, from the vertical area of the content (upper sy and lower ey) in the coordinate system of the display device and the resolution h of the display device 1 surface constituting the multi-screen content display system, the following formula ( 2). In formula (2), ceil (x) indicates rounding up after the decimal point.

Furthermore, if the resolution of all the display devices is clear, the frame output delay time calculation unit 213 can calculate d (n) from the layout of the content even if the resolution of the display device varies from one display device to another. it can.
Furthermore, since the frame output delay time d (n) can be calculated from the content layout, the frame output delay time calculation unit 213 individually calculates the frame output delay time when performing playback control with a control command for each content. be able to.
Note that Δd is one frame (for example, 16.66666 for a 60 Hz display device) in a general computer or the like in which the display terminal device cannot control the timing of the vertical synchronization signal. However, this is not the case when the display terminal device itself can adjust the timing of the vertical synchronization signal.

  In step ST10, since the frame output delay process is not applied, the frame output delay time calculation unit 213 sets the frame output delay time to zero.

In step ST11, the image generation display unit 215 determines whether it is the display time of the next content.
When the frame output delay process is not applied (NO in ST8), the display time of the next content is the scheduled reproduction start time indicated in the timing information. On the other hand, when the frame output delay process is applied (YES in ST8), the display time of the next content is a time obtained by adding the frame output delay time calculated in ST9 to the scheduled playback start time.
If the display time of the next content has come (YES in ST11), step ST12 is executed. On the other hand, if the next content display time has not come (NO in ST11), step ST13 is executed.

In step ST12, the image generation / display unit 215 generates an image (display data) of the first frame of the next content. The image generation / display unit 215 displays a display image based on the area data on the screen of the display device 31 stored in the memory 82 or the storage device 84 and the content data stored in the storage device 84 from the content information. Generate.
For example, the entire screen has a resolution of W horizontal pixels × vertical H pixels, and the display devices 31, 32, 33, and 34 have a resolution of W / 2 pixels in the horizontal direction and H / 2 pixels in the vertical direction on the screen. Assume that content of W pixels × H pixels is displayed. Assuming that the screen coordinate is a coordinate system with the upper left corner of the whole (the upper left corner of the display device 32 in FIG. 1) as the origin, the image generation / display unit 215 has an area of W / 2 × H / 2 from (0, H / 2). A display image is generated with the area in charge. In addition, the image generation / display unit 225 generates a display image using the area from (0, 0) to W / 2 × H / 2 as a responsible area. In addition, the image generation / display unit 235 generates a display image using a region from (W / 2, 0) to W / 2 × H / 2 as a responsible region. In addition, the image generation / display unit 245 generates a display image using the area of (W / 2, H / 2) to W / 2 × H / 2 as a responsible area.
The generation of the first frame image in step ST12 is a process of converting the first frame image read from the storage device 84 into a display image in a format that can be displayed on the display device 31.

In this embodiment, the control command expansion unit 212 only extracts content information from the control command in step ST4, and the image generation / display unit 215 reads content data and generates a display image in step ST12. However, the sharing of processing between the control command expansion unit 212 and the image generation / display unit 215 is not limited to this.
For example, the control instruction expansion unit 212 may read content data in step ST4, and the image generation / display unit 215 may generate a display image from the read content data in step ST12.

  In step ST13, the image generation / display unit 215 generates an image (display data) of the next frame of the content currently being reproduced. If the image currently displayed on the display device 31 is the k-th frame image, the image generation / display unit 215 may generate the k + 1-th frame image or generate the same i-th frame image again. May be. Note that the image generation / display unit 215 generates a display image based on the assigned area information on the screen of the display device, as described in the description of step ST12.

  In step ST14, the image generation display unit 215 outputs the image generated in step ST12 or step ST13 to the display device 31 via the display interface 86.

  In step ST15, the display device 31 displays the image output from the image generation display unit 215.

In the processing procedure of the content reproduction processing in FIG. 6, the image of the first frame of the content is generated in step ST12. When the frame output delay process is not applied, the image of the first frame is generated at the scheduled playback start time, and is output to the display device 31 in step ST14. On the other hand, when the frame output delay process is applied, an image of the first frame is generated at a timing delayed by the frame output delay time, and is output to the display device 31 in step ST14.
In the case of the image after the second frame, NO is determined in step ST7, and since the display time of the content next to the currently reproduced content has not arrived in step ST11, the image is generated in step ST13. In step ST14, the data is output to the display device 31.

*** Explanation of the effect of the embodiment ***
As described above, according to the present embodiment, the application / non-application of the frame output delay process in which the display data output to the lower display device is delayed by one frame from the display data output to the upper display device. By selecting the application according to the characteristics of the content, a higher quality multi-screen content display system can be realized.
That is, as shown in FIG. 12A, when the display on the upper display device and the display on the lower display device are recognized as being shifted by one frame, by performing the frame output delay process, The display shift between the upper display device and the lower display device can be eliminated.
On the other hand, when the display contents change greatly on the entire screen where the main color changes greatly, the frame output delay process is not performed because the switching is conspicuous when the frame output delay process is performed.
As described above, according to the present embodiment, it is determined whether display data is output to the display device at a specified output timing or delayed from the specified output timing and output to the display device. It can be displayed on the display device at the timing.

*** Additional notes ***
In this embodiment, the content data is arranged on the display terminal device and the identification information is handled as the content information. However, the content data is arranged on the control server device and the content data is transmitted from the control server device to the content data. Information may be included in a control command for transmission.

  Further, a content control status transition command such as playback start, pause, restart, display erasure, frame movement, layout movement, etc. is added to the control command and sent. Based on this status transition command, the image generation / display unit 215 executes the next in step ST13 May be selected.

  Further, in the present embodiment, the frame output delay process adoption information is included in the control instruction, but the frame output delay process adoption information may not be included in the control instruction. That is, the display terminal device may store the content data in association with the frame output delay process adoption information for the content data. In this case, in step ST4, content information is extracted and frame output delay process acceptance / rejection information is read.

  The system can display one content, and lay out and display a plurality of contents at the same time. In addition, a display terminal device may be provided in the display device.

Embodiment 2. FIG.
In the first embodiment, application / non-application of frame output delay processing is specified in units of content. That is, in the first embodiment, a control command is transmitted in units of moving images. In this embodiment, a control command is transmitted in units of images. That is, in the present embodiment, application / non-application of frame output delay processing is specified in units of display data.
In the first embodiment, the scheduled reproduction time of content is included in the control information as timing information. However, in this embodiment, since the control is not performed in units of content, the control information includes timing information for each image. The scheduled display time of is included.
In the present embodiment, when frame output delay processing is applied, the display terminal device calculates the frame output delay time based on the screen layout of the display device or the content layout on the screen. When not applied, the frame output delay time is not calculated, and all the display terminal devices simultaneously output the respective display images to the corresponding display devices.

*** Explanation of configuration ***
The system configuration example and the hardware configuration example in this embodiment are as shown in FIG. 1 and FIG.

  Moreover, the functional configuration example of the control server device 10 and the display terminal device 21 in the present embodiment is as shown in FIG. However, in the present embodiment, the control command transmission unit 101 generates a control command from the image in the video signal and timing information indicating the timing for displaying the image (scheduled display time), and displays the display terminal devices 21, 22, 23 and 24. Further, the frame output delay time calculation unit 213 outputs, for each image, each image to the display device 31 at the scheduled display time that is the output timing specified for each image, or delays each image from the scheduled display time of each image. Whether to output to the display device 31 is determined.

*** Explanation of operation ***
The processing procedure of the control command transmission process in the present embodiment is the same as that in FIG. However, the control command is different from the first embodiment in that the control command is transmitted for each image in the video signal.

  The processing procedure of the control command reception process in the present embodiment is the same as that in FIG. However, the difference from Embodiment 1 is that the control command expansion unit 212 passes the control command directly to the image generation / display unit 215 in step ST4.

FIG. 7 is a flowchart showing a processing procedure of content reproduction processing according to the second embodiment.
Below, although the process in the display terminal device 21 is demonstrated, the same process is performed also in the display terminal devices 22, 23, and 24. 7 corresponds to an example of a data processing method and a data processing program.

In step ST16, the screen update instruction unit 214 detects the vertical synchronization signal, and notifies the image generation display unit 215 of the detection of the vertical synchronization signal.
In step ST17, the image generation / display unit 215 determines whether a control command including the next display image has been received.
If it has been received, step ST18 is executed, and if it has not been received, step ST21 is executed.

  In this embodiment, it is assumed that the control command expansion unit 212 or the image generation display unit 215 has a command buffer. In step ST14, the control instruction expansion unit 212 writes the control instruction in the command buffer. In step ST17, the image generation / display unit 215 acquires a control command from the command buffer. Then, the image generation display unit 215 determines whether the acquired control command is updated. Further, the image generation / display unit 215 may always delete the control command after acquiring the control command from the command buffer, and may determine in step ST17 based on whether the control command has been acquired.

In step ST18, the frame output delay time calculation unit 213 determines whether or not to apply the frame output delay process to the next display image.
Whether to apply frame output delay processing by including frame output delay processing acceptance information in the control command and referring to the frame output delay processing acceptance information by the frame output delay time calculation unit 213 as in the first embodiment. May be determined.
Further, it may be determined whether to apply the frame output delay processing without using the frame output delay processing adoption information. Specifically, the frame output delay time calculation unit 213 displays the next display image to be output to the display device 31 (the display image included in the control command acquired in ST17, hereinafter referred to as the next output display data), and the next output display. A display image output to the display device 31 immediately before the data (hereinafter referred to as previous output display data) is compared. Then, based on the comparison result, whether to output the next output display data to the display device 31 at the scheduled display time of the next output display data or to output to the display device 31 with a delay from the scheduled display time of the next output display data. judge. For example, when the difference between the next output display data and the previous output display data is equal to or higher than a predetermined level as a result of the comparison, the frame output delay time calculation unit 213 displays the next output display data as the scheduled display time of the next output display data. To output to the display device 31. On the other hand, when the difference between the next output display data and the output display data is less than the predetermined level, it is determined that the next output display data is output to the display device 31 with a delay from the scheduled display time of the next output display data.
More specifically, the frame output delay time calculation unit 213 detects a scene change using a general scene change detection method, and if the scene is different between the previous output display data and the next output display data, It is determined that the frame output delay processing is not applied to the output display data. The reason why frame output delay processing is not applied when the scenes are different is that the video becomes discontinuous, and the phenomenon that the screen update time for switching takes longer than the continuity of motion affects the quality. is there.
As a method for detecting a scene change, for example, a method of obtaining histograms of two images before and after to obtain a feature amount, and determining that the scene is different when the difference between the feature amounts exceeds a threshold value may be used.
Also, the frame output delay time calculation unit 213 detects a motion vector in the previous output display data and the next output display data, not a scene change, and cannot track the object whether the movement amount of the main object is a certain amount or more. In this case, it may be determined that the frame output delay process is not applied. At that time, the evaluation may be performed by the movement amount only in the direction horizontal to the scanning line.

  A method in which the frame output delay time calculation unit 213 compares the previous output display data and the next output display data to determine whether or not to accept the frame output delay process without using such frame output delay process acceptance / rejection information. The present invention is also applicable when determining whether or not to adopt the frame output delay processing in units of contents described in the first embodiment.

  In step ST19, the frame output delay time calculation unit 213 calculates a frame output delay time applied to the scheduled display time of the next display image. The frame output delay time calculation method is the same as that described in step ST9 of the first embodiment.

  In step ST20, since the frame output delay process is not applied, the frame output delay time calculation unit 213 sets the frame output delay time to zero.

In step ST21, the image generation display unit 215 determines whether it is the display time of the next display image.
When frame output delay processing is not applied (NO in ST18), the display time of the next display image is the scheduled display time indicated in the timing information. On the other hand, when the frame output delay process is applied (YES in ST18), the display time of the next display image is a time obtained by adding the frame output delay time calculated in ST19 to the scheduled display time.
If the display time of the next display image has arrived (YES in ST21), step ST22 is executed. On the other hand, if the display time of the next display image has not come (NO in ST21), step ST23 is executed.

  In step ST22, the image generation display unit 215 generates the next display image. The display image generation method is the same as that described in step ST12 of the first embodiment. That is, the display image received from the control server device 10 is converted into a display image that can be displayed on the display device 31.

  In step ST23, the image generation display unit 215 does not generate a display image because the display time of the next display image has not arrived.

  In step ST24, the image generation display unit 215 outputs the display image generated in step ST22 or the previous display image to the display device 31 via the display interface 86.

  In step ST25, the display device 31 displays the image output from the image generation display unit 215.

  As described above, unlike the first embodiment, even when a video signal is distributed from the control server device and is reproduced on the multi-screen content display system, display data output to the lower display device is output to the upper display device. By selecting whether to apply frame output delay processing that is delayed by one frame from the output of display data according to changes in image characteristics between display images, a higher quality multi-screen content display system can be achieved. Can be realized.

*** Explanation of the effect of the embodiment ***
As in the first embodiment, even if the configuration is such that the control command is transmitted in units of content, ST18 and ST23 in ST18 to ST23 in FIG. 7 are performed instead of ST13 in FIG. As described above, it is possible to realize a higher-quality multi-screen content display system by properly applying or not applying the frame output delay processing for each image.

Embodiment 3 FIG.
In the present embodiment, the display terminal apparatus receives the frame output delay time calculated by another display terminal apparatus, and calculates the frame output delay time based on the received frame output delay time. In addition, the display terminal device transmits the calculated frame output delay time to another display terminal device.

*** Explanation of configuration ***
FIG. 8 shows a system configuration example of the multi-screen content display system according to the present embodiment.
In the present embodiment, the screen is composed of nine display devices 31 to 39. That is, in the present embodiment, nine display devices are arranged in three horizontal rows and three vertical rows. Moreover, nine display terminal devices 21 to 29 are also provided. In addition, illustration of the display terminal devices 24-28 is abbreviate | omitted for the reason on drawing. In the present embodiment, a display terminal device and a display device having the same last digit are connected. For example, the display terminal device 21 and the display device 31 are connected, the display terminal device 22 and the display device 32 are connected, and the display terminal device 29 and the display device 39 are connected.
In this way, the display device connected to the display terminal device is referred to as a connection destination display device. That is, the display device 31 is a connection destination display device of the display terminal device 21, the display device 32 is a connection destination display device of the display terminal device 22, and the display device 39 is a connection destination display device of the display terminal device 29.

FIG. 9 shows a functional configuration example of the third embodiment.
Since the functional configuration of the control server device 10 is the same as that in FIG.
FIG. 9 shows an example of the functional configuration of the display terminal devices 21, 22, and 25.
The functional configurations of the display terminal devices 21, 22, 25 are the same as those shown in FIG. Elements other than the frame output delay time calculation units 213, 223, and 253 are the same as the elements having the same names shown in FIG.
The display terminal devices 21, 22, and 25 are connected to display devices 31, 32, and 35 arranged in the vertical direction.
The frame output delay time calculation unit 213 receives the frame output delay time from the frame output delay time calculation unit 223 of the display terminal device 22 connected to the display device 32 in the upper stage of the display device 31 that is the connection destination display device. . The frame output delay time received by the frame output delay time calculation unit 213 from the frame output delay time calculation unit 223 is a frame output delay time when the display terminal device 22 outputs a display frame to the display device 32. The frame output delay time calculation unit 213 calculates a frame output delay time when a display frame is output to the display device 31 based on the received frame output delay time. The frame output delay time calculation unit 213 calculates the frame output delay calculated to the frame output delay time calculation unit 253 of the display terminal device 25 connected to the display device 35 in the lower stage of the display device 31 that is the connection destination display device. Send time.
As described above, in this embodiment, the frame output delay time calculation unit of each display terminal device is connected to the display device (for example, display device 32) arranged on the upper stage of the connection destination display device (for example, display device 31). The frame output delay time is received from the frame output delay time calculation unit of the display terminal device (for example, display terminal device 22). In addition, the frame output delay time calculation unit of each display terminal device has a display terminal device (for example, display device 35) connected to a display device (for example, display device 35) arranged at the lower stage of the connection destination display device (for example, display device 31). The calculated frame output delay time is transmitted to the frame output delay time calculation unit of the display terminal device 25).
In other words, the frame output delay time calculation unit of each display terminal device displays the earliest of the scanning lines of the connection destination display device in a direction perpendicular to the scanning line of the connection destination display device (for example, the display device 31). The delay time is received from another display terminal device (for example, display terminal device 22) connected to the display device (for example, display device 32) adjacent to the side of the connected display device closest to the scanning line. Further, the frame output delay time calculation unit of each display terminal device scans the last display of the scanning lines of the connection destination display device in the direction perpendicular to the scanning lines of the connection destination display device (for example, the display device 31). The calculated delay time is transmitted to another display terminal device (for example, display terminal device 25) connected to the display device (for example, display device 35) adjacent to the side of the connection destination display device closest to the line.
In FIG. 9, only the transmission / reception of the frame output delay time between the display terminal devices 21, 22, and 25 is shown, but the frame output delay time is similarly applied between the display terminal devices 23, 24, and 26. The frame output delay time is similarly transmitted / received between the display terminal devices 29, 28, and 27.

*** Explanation of operation ***
Since the processing procedures of the control command transmission process and the control command reception process in the present embodiment are the same as those in FIGS. 4 and 5, description thereof will be omitted.
The processing procedure of content reproduction processing in the present embodiment is the same as that in FIG. 6 except for step ST9.
FIG. 10 is a detailed flowchart of the delay time calculation process for the next content in the frame output delay time calculation processing unit 213 shown in step ST9 of FIG. 6 in the content reproduction process according to the present embodiment.

In step ST <b> 26, the frame output delay time calculation unit 213 determines that the display device 31, which is the connection destination display device of the display terminal device 21, displays the multi-screen based on the arrangement information of the display devices 31 to 39 stored in the storage device 84. It is determined whether or not the content display system is arranged on the uppermost stage on the screen.
If the display device 31 is not arranged in the uppermost stage, step ST27 is executed, and if the display device 31 is arranged in the uppermost stage, step ST29 is executed.

  In step ST27, the frame output delay time calculation unit 213 obtains the frame output delay time from the frame output delay time calculation unit 223 of the display terminal device 22 connected to the display device 32 arranged on one stage of the display device 31. get. More specifically, the frame output delay time calculation unit 213 receives the frame output delay time transmitted from the frame output delay time calculation unit 223 via the communication interface 85.

In ST28, the frame output delay time calculation unit 213 calculates the frame output delay time used in the image generation display unit 215.
More specifically, the frame output delay time calculation unit 213 calculates the frame output delay time according to the following procedure.
Assuming that the display device 32 is the i-th display device, the display device 31 is the j-th display device, and d (n) is the frame output delay time of the n-th display device, a frame for outputting display data to the display device 31 The output delay time can be expressed by Equation (3). Note that Δd is a frame output delay time when display data is output to the display device one level lower when the configuration of the display device is two levels.

  In step ST29, the frame output delay time calculation unit 213 sets the frame output delay time to zero.

In step ST30, the frame output delay time calculation unit 213 arranges the display device 31 as the connection destination display device in the lowest stage on the screen of the multi-screen content display system based on the arrangement information of the display devices 31 to 39. It is determined whether or not.
If the display device 31 is not arranged at the lowest level, step S31 is executed, and if the display device 31 is arranged at the lowest level, the process ends.

  In step ST31, the frame output delay time calculation unit 213 sends the frame output delay time d to the frame output delay time calculation unit 253 of the display terminal device 25 connected to the display device 35 arranged below the display device 31. (J) is transmitted via the communication interface 85.

The frame output delay time calculation unit 223 of the display terminal device 22 sets YES in step ST26, sets frame output delay time = 0 in step ST29, sets NO in step ST30, and sets frame output delay time = 0 in step S31. This is transmitted to the frame output delay time calculation unit 213 of the device 21.
In the frame output delay time calculation unit 253 of the display terminal device 25, NO is determined in step ST26, the frame output delay time is acquired from the frame output delay time calculation unit 213 of the display terminal device 21 in step ST27, and the frame output delay is determined in step ST28. The time is calculated, and YES is determined in ST30, and the process is terminated.

*** Explanation of the effect of the embodiment ***
As described above, unlike the first embodiment, each display terminal device is connected to the display device in contact with the top and bottom by calculating the frame output delay time for its own display device based on the frame output delay time for the upper display terminal device. If the displayed display terminal device can be recognized, the display data output to the lower display device can be output to the lower display device in accordance with the content without obtaining information on the arrangement of the display devices of the entire multi-screen content display system. The application / non-application of the frame output delay process that is delayed by one frame from the output of the display data to can be selected, and a higher quality multi-screen content display system can be obtained.

*** Additional notes ***
The method described in the third embodiment can be applied to step ST19 in the second embodiment by replacing “next content” with “next display image”.
Further, by applying the method described in the third embodiment to the second embodiment, in ST18 of the second embodiment, the feature amount is obtained by comparing only the display area of the content generated by the image generation / display unit 215. It is also possible to evaluate and determine whether to apply frame output delay processing. Furthermore, the target region for which the feature amount is calculated may be only the region above the display device 31 that is close to the upper display device 32.

  Further, even in a configuration in which one display terminal device is connected to a plurality of display devices, as shown in FIG. 11, a plurality of control command expansion units and a frame output delay time calculation unit are included in one display terminal device. If the image generation display unit, the screen update instruction unit, and the inter-screen synchronization processing unit are provided, the same effect can be obtained.

As mentioned above, although embodiment of this invention was described, you may implement in combination of 2 or more among these embodiment.
Alternatively, one of these embodiments may be partially implemented.
Alternatively, two or more of these embodiments may be partially combined.
In addition, this invention is not limited to these embodiment, A various change is possible as needed.
*** Explanation of hardware configuration ***
Finally, a supplementary explanation of the hardware configuration will be given.
The processors 71 and 81 shown in FIG. 2 are ICs (Integrated Circuits) that perform processing.
The processors 71 and 81 are a CPU (Central Processing Unit), a DSP (Digital Signal Processor), and the like.
The graphics processor 83 is a GPU (Graphics Processing Unit) or the like.
The memories 72 and 82 are RAMs (Random Access Memory).
The storage devices 73 and 84 are ROM (Read Only Memory), flash memory, HDD (Hard Disk Drive), and the like.
The communication interfaces 74 and 85 are, for example, communication chips or NIC (Network Interface Card).
The display interface 86 is a circuit connected to the display device 31.

The storage devices 73 and 84 also store an OS (Operating System).
At least a part of the OS is executed by the processors 71 and 81.
The processor 71 executes a program that realizes the functions of the control command transmission unit 101 and the inter-screen synchronization processing unit 102 while executing at least a part of the OS.
The processor 81 executes at least a part of the OS while controlling the control command receiving unit 211, the control command expanding unit 212, the frame output delay time calculating unit 213, the screen update instruction unit 214, the image generation display unit 215, and the inter-screen synchronization. A program for realizing the function of the processing unit 216 is realized.
When the processors 71 and 81 execute the OS, task management, memory management, file management, communication control, and the like are performed.
Also, information, data, signal values, and variable values indicating the results of processing in the control server device 10 are stored in the memory 72, the storage device 73, or a register or cache memory in the processor 71.
In addition, information, data, signal values, and variable values indicating the results of processing in the display terminal device 21 are stored in the memory 82, the storage device 84, or a register or cache memory in the processor 81.
Also, a program for realizing the functions of the control command transmission unit 101 and the inter-screen synchronization processing unit 102, a control command reception unit 211, a control command expansion unit 212, a frame output delay time calculation unit 213, a screen update instruction unit 214, an image generation display Programs that realize the functions of the unit 215 and the inter-screen synchronization processing unit 216 may be stored in a portable storage medium such as a magnetic disk, a flexible disk, an optical disk, a compact disk, a Blu-ray (registered trademark) disk, or a DVD.

In addition, the control server device 10 and the display terminal device 21 may be implemented by electronic circuits such as logic IC (Integrated Circuit), GA (Gate Array), ASIC (Application Specific Integrated Circuit), and FPGA (Field-Programmable Gate Array). Good.
The processors 71 and 81 and the above electronic circuits are also collectively referred to as a processing circuitry.

  DESCRIPTION OF SYMBOLS 10 Control server apparatus, 21 Display terminal apparatus, 22 Display terminal apparatus, 23 Display terminal apparatus, 24 Display terminal apparatus, 25 Display terminal apparatus, 29 Display terminal apparatus, 31 Display apparatus, 32 Display apparatus, 33 Display apparatus, 34 Display apparatus , 35 display device, 39 display device, 71 processor, 72 memory, 73 storage device, 74 communication interface, 81 processor, 82 memory, 83 graphics processor, 84 storage device, 85 communication interface, 86 display interface, 101 control command transmission Unit, 102 inter-screen synchronization processing unit, 211 control command receiving unit, 212 control command expansion unit, 213 frame output delay time calculation unit, 214 screen update instruction unit, 215 image generation display unit, 216 inter-screen synchronization processing unit, 221 control Command receiver, 222 control Command expansion unit, 223 frame output delay time calculation unit, 224 screen update instruction unit, 225 image generation display unit, 226 inter-screen synchronization processing unit, 231 control command reception unit, 232 control command expansion unit, 233 frame output delay time calculation unit 234 Screen update instruction section, 235 Image generation display section, 236 Inter-screen synchronization processing section, 241 Control command reception section, 242 Control command expansion section, 243 Frame output delay time calculation section, 244 Screen update instruction section, 245 Image generation display , 246 inter-screen synchronization processing unit, 251 control command receiving unit, 252 control command expansion unit, 253 frame output delay time calculation unit, 254 screen update instruction unit, 255 image generation display unit, 256 inter-screen synchronization processing unit.

Claims (14)

A display terminal device connected to any display device included in a multi-screen content display system in which a plurality of display devices are arranged adjacent to each other in a tile shape to constitute one screen ,
Display data at an arbitrary position among the plurality of display data to be output to the display device continuously, whether to output to the display device at the specified output timing is the output timing that is specified in the display data, the designation An output control unit for determining whether to output to the display device with a delay from the output timing;
When the output control unit determines that the display data is to be output to the display device at the specified output timing, the display data is output to the display device at the specified output timing, and the display data is output by the output control unit. A display terminal device including: an output unit that outputs the display data to the display device by delaying the display data from the specified output timing when it is determined that the display data is output to the display device after being delayed from the specified output timing. The output control unit
When it is determined that the display data is delayed from the designated output timing and output to the display device, a delay time from the designated output timing is calculated,
The output unit is
When it is determined by the output control unit that the display data is delayed from the specified output timing and output to the display device, the display data is output to the display device after being delayed by the delay time from the specified output timing. The display terminal device according to claim 1. The output control unit
2. The display device according to claim 1 , wherein the first display data among the plurality of display data is determined to be output to the display device at a specified output timing of the first display data or to be output to the display device with a delay. Display terminal device. The output control unit
2. It is determined for each display data whether each display data is output to the display device at a specified output timing of each display data or is output to the display device after being delayed from a specified output timing of each display data. The display terminal device described in 1. The output control unit
The next output display data to be output next to the display device is compared with the previous output display data to be output to the display device immediately before the next output display data, and the next output display data is determined based on the comparison result. 2. The display terminal according to claim 1, wherein it is determined whether to output to the display device at a specified output timing of the next output display data or to output to the display device with a delay from a specified output timing of the next output display data. apparatus. The output control unit
As a result of the comparison between the next output display data and the previous output display data, if the difference between the next output display data and the previous output display data is greater than or equal to a predetermined level, the next output display data is converted to the next output display data. When it is determined that display data is output to the display device at a specified output timing, and the difference between the next output display data and the previous output display data is less than the predetermined level, the next output display data is output to the next output The display terminal device according to claim 5 , wherein it is determined that the display data is output to the display device with a delay from a specified output timing of display data. The output control unit
The delay time when the other display terminal device outputs display data to the display device connected to the other display terminal device is received from the other display terminal device, and the delay time received from the other display terminal device is The display terminal device according to claim 2, wherein a delay time from the designated output timing is calculated based on. The output control unit
The display terminal device according to claim 7 , wherein the calculated delay time is transmitted to another display terminal device different from the other display terminal device. The display terminal device
Connected to any one of a plurality of display devices arranged adjacent to each other,
The output control unit
In the direction perpendicular to the scanning line of the connection destination display device which is the connection destination display device, the side of the connection destination display device closest to the scanning line to be displayed first among the scanning lines of the connection destination display device The display terminal device according to claim 7 , wherein the delay time is received from another display terminal device connected to the adjacent display device. The output control unit
A display device adjacent to a side of the connection destination display device closest to a scan line to be displayed last among the scan lines of the connection destination display device in a direction perpendicular to the scan line of the connection destination display device; The display terminal device according to claim 9 , wherein the calculated delay time is transmitted to another connected display terminal device. The display terminal device
Connected to any one of a plurality of display devices arranged adjacent to each other,
The output control unit
Display data to be output to a connection destination display device that is a connection destination display device is output to the display device at a designated output timing that is an output timing common to the plurality of display devices, or is delayed from the designated output timing. The display terminal device according to claim 1, wherein it is determined whether to output to the display device. Multi-screen constituting a display unit for displaying the display data, have a display terminal unit which outputs the display data on the display unit, and another to be adjacent a plurality of display devices to one screen and tiled A display device included in the content display system ,
The display terminal unit is
Display data at an arbitrary position among the plurality of display data continuously outputted to the display unit, or outputs to the display unit at the specified output timing is the output timing that is specified in the display data, the designation An output control unit for determining whether to output to the display unit with a delay from the output timing;
When the output control unit determines that the display data is to be output to the display unit at the specified output timing, the display data is output to the display unit at the specified output timing, and the display data is output by the output control unit. A display unit that outputs the display data to the display unit with a delay from the specified output timing when it is determined that the display data is output to the display unit with a delay from the specified output timing. A data processing method performed by a computer connected to any display device included in a multi-screen content display system in which a plurality of display devices are arranged adjacent to each other in a tile shape to constitute one screen ,
Display data at an arbitrary position among the plurality of display data to be output to the display device continuously, whether to output to the display device at the specified output timing is the output timing that is specified in the display data, the designation An output control step in which the computer determines whether to output to the display device with a delay from the output timing; and
When it is determined in the output control step that the display data is output to the display device at the designated output timing, the computer outputs the display data to the display device at the designated output timing. An output step in which the computer delays the display data from the designated output timing and outputs the display data to the display device when it is determined that the display data is delayed from the designated output timing and output to the display device. Data processing method. A computer connected to one of the display devices included in the multi-screen content display system in which a plurality of display devices are arranged adjacent to each other in a tile shape to constitute one screen ,
Display data at an arbitrary position among the plurality of display data to be output to the display device continuously, whether to output to the display device at the specified output timing is the output timing that is specified in the display data, the designation An output control step for determining whether to output to the display device with a delay from the output timing;
When it is determined in the output control step that the display data is output to the display device at the specified output timing, the display data is output to the display device at the specified output timing, and the display data is output by the output control step. A data processing program that executes an output step of outputting the display data to the display device with a delay from the designated output timing when it is determined to output the display data to the display device with a delay from the designated output timing.

Images