JP2017016041A - Still image transmission-reception synchronous reproducing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a still image transmission-reception synchronous reproducing apparatus for displaying still images on a plurality of displays, respectively synchronously at a time of displaying the still images.SOLUTION: A still image transmission-reception synchronous reproducing apparatus comprises: a transmitter 100 to which a plurality of still images are input; a first receiver 201, a second receiver 202, and a third receiver 203 each extracting and storing a still image of a preset frame; and displays 401, 402, 403 displaying videos from the first to third receivers, respectively. Video inputs and outputs of the first to third receivers are connected by a daisy chain. The first to third receivers each select a preset still image and stores the same in a memory. Video signals from the first to third receivers are switched at the same vertical synchronization timing to the plurality of displays, thereby simultaneously, synchronously displaying an image 1, an image 2, and an image 3 on the respective displays.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a transmission / reception display device that connects a plurality of display devices to a transmitter and displays a still image on the display device.

  In recent years, many signage displays have been installed as electronic advertisements for commercial facilities. As an advertising system, an advertising system is used in which a video signal is transmitted from one transmitter and a plurality of displays are combined to form one large screen. On the other hand, there is an advertising system in which a plurality of displays are arranged at different locations and the videos are linked to each other, and the value of the advertisement is increased by using the plurality of displays in cooperation.

  Patent Document 1 discloses a still image multi-display device and a video signal generating device configured by arranging a plurality of video display devices vertically and horizontally as one display. This display device and signal generation device, for example, send a still image with a resolution of 5760 × 3240 in a daisy chain connection to a display device with a resolution of 1920 × 1080 in a daisy chain connection to a 3 × 3 multi-display. When transmitting and receiving still image signals composed of video signals and synchronization signals in a time-sharing manner, high-definition still images can be transmitted and received through a single transmission / reception line of a limited signal band. Can do.

JP 2012-78393 A

  The present disclosure provides a still image transmission / reception synchronized playback device that displays a display timing in synchronization when displaying each still image on a plurality of displays.

  A still image transmission / reception synchronized playback device of the present disclosure includes a signal conversion circuit that converts a series of still images related to each other and a playback timing signal that sets a playback timing of the still image into a signal of a predetermined moving image format, A preset still image is selected from a transmitter including a signal transmission unit that transmits a signal input from the signal conversion circuit, a signal reception unit that receives the signal, and a signal input to the signal reception unit. A signal selection storage unit that extracts and stores the signal, a signal transmission unit that transmits a signal received by the signal reception unit, and a display that displays a still image selected by the signal selection storage unit of the receiver A plurality of receivers are connected by a daisy chain by a transmission line, and a signal from a signal transmitter of a transmitter is supplied to each receiver. It is read out from the signal selection storage section based on the reproduction timing signal, so as to play back at the same time on each display.

  The still image transmission / reception synchronized playback apparatus according to the present disclosure is effective in displaying still images to be displayed on a plurality of displays in a synchronized manner.

FIG. 3 is a block diagram illustrating a configuration of a still image transmission / reception synchronized playback device according to Embodiment 1; FIG. 3 is a timing chart for explaining a flow of delivery between the still image transmitter and receiver in the first embodiment. FIG. 10 shows a table for illustrating receiver selection settings in the first embodiment; The figure which shows the table | surface which put together the result displayed on the display in Embodiment 1. FIG. 3 is a block diagram illustrating a configuration of a still image transmission / reception synchronized playback device according to Embodiment 2; FIG. 9 is a timing chart for explaining a flow of delivery between the still image transmitter and receiver in the second embodiment. The figure which shows the table | surface for illustrating the command of the controller in Embodiment 2 The figure which shows the table | surface which put together the result displayed on the display in Embodiment 2.

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(Embodiment 1)
Hereinafter, Embodiment 1 will be described with reference to FIGS.

[1-1. Constitution]
Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

  FIG. 1 illustrates a schematic configuration diagram of a still image transmission / reception synchronized playback apparatus according to an embodiment of the present disclosure.

  In FIG. 1, a still image is supplied to the transmitter 100 from still image sources 101, 102, and 103. The output signal of the transmitter 100 is supplied to the first receiver 201, the second receiver 202, and the third receiver 203 via the transmission path 301 and displayed on the display.

  In the still image transmission / reception synchronized playback device of the present embodiment, still image video signals from a plurality of (three in this embodiment) still image sources are input to the transmitter 100. The transmitter 100 includes a signal conversion circuit 111 that superimposes and synthesizes a plurality of still image sources on a moving image format of HDMI (High-Definition Multimedia Interface) standard as a still image video signal, and a video generated by the signal conversion circuit 111. And an HDBaseT transmission unit 112 that converts the signal into an HDBaseT (registered trademark) signal.

  The HDBaseT signal output from the HDBaseT transmission unit 112 is supplied to the first receiver 201 through the transmission path 301. The first receiver 201 receives an HDBaseT signal and converts it to an HDMI signal, and a signal selection storage 211 that selects and extracts a still image previously set by the first receiver 201 from the HDMI signal and stores it. Unit 221 and an HDBaseT transmission unit 231 that converts the signal received by the HDBaseT reception unit 211 into an HDBaseT signal again. The display 401 displays the still image selected by the signal selection storage unit 221.

  The second receiver 202 also includes an HDBaseT receiving unit 212, a signal selection storage unit 222, and an HDBaseT transmission unit 232, and the still image selected by the signal selection storage unit 222 is displayed on the display 402. The third receiver also includes an HDBaseT receiving unit 213, a signal selection storage unit 223, and an HDBaseT transmission unit 233, and the still image selected by the signal selection storage unit 223 is displayed on the display 403. A first receiver 201, a second receiver 202, and a third receiver 203, each comprising an HDBaseT receiving unit, a signal selection storage unit, and an HDBaseT transmitting unit, are connected in a daisy chain via a transmission line 301.

[1-2. Operation]
For the still image transmission / reception synchronized playback apparatus configured as described above, the operation when the number of still image sources is three and the number of receivers is three as in the configuration of FIG. 1 will be described below.

  FIG. 2 shows a timing chart from a method of superimposing three still images on a moving image format and combining them to displaying still images on three displays.

  Still images output from the still image sources 101, 102, and 103 are image 1, image 2, and image 3, respectively. All of the still images are still images having a resolution of 1920 × 1080, and the receiver storage unit stores the still images. An example in the case of having a frame memory that can be stored and a display capable of displaying a 1920 × 1080 image will be described below.

  The three still images, image 1, image 2, and image 3, are assigned to the positions of image 1, image 2, and image 3 of the transmitter output shown in FIG. . Here, the ID shown in the transmitter output is a control signal indicating the beginning of the transmitter output signal repeated in time, and is assumed to be the 0th frame. Still picture 1 is assigned to the first frame, still picture 2 is assigned to the second frame, and still picture 3 is assigned to the third frame. PLAY is a control signal for controlling the timing of outputting the video signal stored in the storage unit of the receiver to the display, and is assigned to the fourth frame. After PLAY, it is repeated in the above format starting from ID again. With respect to the transmitter output signal, the vertical synchronization signal exists at the timing shown in FIG. 2, and each control timing is processed at the timing of the vertical synchronization.

  The first receiver 201, the second receiver 202, and the third receiver 203 are set in advance as to which frame still image to select. For example, as shown in FIG. 3, the first receiver 201 is set to select the first frame still image, the second receiver 202 is set to select the second frame still image, and the third receiver 203 is set to select the third frame still image. Has been. The operation in this case will be described with reference to the timing chart shown in FIG.

  As shown in FIG. 2, the signal selection storage unit 221 of the first receiver 201 stores the signal selection storage of the first receiver 201 at the timing of vertical synchronization immediately after the transmission of the image 1 in the signal output from the transmitter. The still image of image 1 is stored in the memory of unit 221. After that, when a receiver receives a PLAY control signal after a plurality of still images are output from the transmitter, the signal 1 from the signal selection storage unit 221 is displayed at the timing (reproduction timing) of the vertical synchronization signal after the PLAY. A still image is output to the display 401 as an HDMI moving image signal. The display 401 displays the still image of the image 1 in synchronization with the reproduction timing.

  Similarly, the signal selection storage unit 222 of the second receiver 202 stores the signal of the second receiver 202 at the timing of the vertical synchronization immediately after the transmission of the image 2 in the signal output from the transmitter as shown in FIG. The still image of the image 2 is stored in the memory of the signal selection storage unit 222. After that, after a plurality of still images are output from the transmitter, when the receiver receives a PLAY control signal, the signal selection storage unit 222 reads the image 2 from the signal selection storage unit 222 at the timing of the vertical synchronization signal after the PLAY (reproduction timing). The still image is output to the display 402 as an HDMI moving image signal. The display 402 displays the still image of the image 2 in synchronization with the reproduction timing.

  Similarly, as shown in FIG. 2, the signal selection storage unit 223 of the third receiver 203 stores the signal of the third receiver 203 at the timing of vertical synchronization immediately after the transmission of the image 3 in the signal output from the transmitter. The still image of the image 3 is stored in the memory of the signal selection storage unit 223. After that, after a plurality of still images are output from the transmitter, when the receiver receives a PLAY control signal, the timing of the vertical synchronization signal (playback timing) after the PLAY is transferred from the signal selection storage unit 223 to the image 3. The still image is output to the display 403 as an HDMI moving image signal. The display 403 displays a still image of the image 3 in synchronization with the reproduction timing.

  From the above, still images displayed on the displays 401, 402, and 403 are displayed as image 1, image 2, and image 3, respectively, as shown in FIG. Furthermore, the displays 401, 402, and 403 are set to have the same delay time from video input to display, so that the display timings on the display are simultaneously switched and displayed.

[1-3. Effect]
As described above, in the present embodiment, a transmitter 100 that inputs a plurality of still images, a first receiver 201 that extracts and stores still images of preset frames, a second receiver 202, and a second receiver 3 receiver 203 and displays 401, 402, 403 for displaying images from the receiver, respectively. Video inputs and outputs of the first receiver 201, the second receiver 202, and the third receiver 203 are connected in a daisy chain. The first receiver 201, the second receiver 202, and the third receiver 203 select a preset still image and store it in the memory. By switching the video signals from the first receiver 201, the second receiver 202, and the third receiver 203 at the same vertical synchronization timing on a plurality of displays, the images on the displays 401, 402, and 403 are simultaneously synchronized. 1, image 2, and image 3 are displayed.

(Embodiment 2)
Hereinafter, the second embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same component as Embodiment 1. FIG.

[2-1. Constitution]
In the still image transmission / reception synchronized playback device of the present embodiment, still image video signals from a plurality of still image sources are input to the transmitter 100. The transmitter 100 includes a signal conversion circuit 111 that superimposes and synthesizes still image video signals from a plurality of still image sources in an HDMI standard moving image format, a controller 113 that supplies a control signal C for controlling the receiver, and a signal conversion An HDBaseT transmission unit 112 that compresses and synthesizes the video signal created by the circuit and the control signal C is provided. The HDBaseT signal output from the HDBaseT transmission unit 112 is transmitted to the HDBaseT reception unit 211 of the first receiver 201 via the transmission path 301.

  The first receiver 201 includes a signal selection storage unit 221 and an HDBaseT transmission unit 231 in addition to the HDBaseT reception unit 211. The HDBaseT receiving unit 211 receives the HDBaseT signal and converts it into an HDMI signal and a control signal. The signal selection storage unit 221 controls and extracts which still image is selected from the HDMI signal input from the HDBaseT reception unit 211 according to setting information set in advance by the controller 113, and stores the selected still image. The still image selected by the signal selection storage unit 221 is displayed on the display 401. The HDBaseT transmission unit 231 converts the signal received by the HDBaseT reception unit into an HDBaseT signal again.

  The second receiver 202 also includes an HDBaseT receiving unit 212, a signal selection storage unit 222, and an HDBaseT transmission unit 232, and the still image selected by the signal selection storage unit 222 is displayed on the display 402. The third receiver also includes an HDBaseT receiving unit 213, a signal selection storage unit 223, and an HDBaseT transmission unit 233, and the still image selected by the signal selection storage unit 223 is displayed on the display 403. A first receiver 201, a second receiver 202, and a third receiver 203, each comprising an HDBaseT receiving unit, a signal selection storage unit, and an HDBaseT transmitting unit, are connected in a daisy chain via a transmission line 301.

[2-2. Operation]
Regarding the still picture transmission / reception synchronized playback apparatus configured as described above, the operation when there are three still picture sources and three receivers as shown in FIG. 5 will be described below.

  FIG. 6 shows a timing chart from a method of superimposing and synthesizing three still images on a moving image format to displaying a still image on three displays.

  Still images output from the still image sources 101, 102, and 103 are image 1, image 2, and image 3, respectively. All of the still images are still images having a resolution of 1920 × 1080, and the receiver storage unit stores the still images. An example in the case of having a frame memory that can be stored and a display capable of displaying a 1920 × 1080 image will be described below.

  Three still images, image 1, image 2, and image 3, are assigned to the positions of image 1, image 2, and image 3 of the transmitter output shown in FIG. . Here, the ID shown in the transmitter output is a control signal indicating the beginning of the transmitter output signal repeated in time, and is assumed to be the 0th frame. Still picture 1 is assigned to the first frame, still picture 2 is assigned to the second frame, and still picture 3 is assigned to the third frame. PLAY is a control signal for controlling the timing of outputting the video signal stored in the storage unit of the receiver to the display, and is assigned to the fourth frame. After PLAY, it is repeated in the above format starting from ID again. With respect to the transmitter output signal, the vertical synchronization signal exists at the timing shown in FIG. 6, and each control timing is processed at the timing of the vertical synchronization.

  The first receiver 201, the second receiver 202, and the third receiver 203 are set in advance in the controller 113 as to which frame still image is to be selected. For example, as shown in FIG. The first receiver 201 is set to select the second frame still image, the second receiver 202 is set to select the third frame still image, and the second receiver 203 is selected to select the second frame still image. Setting information is set to The control information set in the controller 113 in FIG. 7 is superimposed on the HDBaseT transmission unit 112 as a control signal in FIG. 5 and is connected in a daisy chain through the transmission path 301, 3 is sent to the receiver 203. The HDBaseT receiving units 211, 212, and 213 respectively decode the signals into control signals, and transmit to the signal selection storage units 221, 222, and 223 control information as to which still image to select. The operation in the case of the control information of the controller shown in FIG. 7 will be described using the timing chart shown in FIG.

  As shown in FIG. 6, the signal selection storage unit 221 of the first receiver 201 stores the signal selection storage of the first receiver 201 at the timing of vertical synchronization immediately after the transmission of the image 2 in the signal output from the transmitter. The still image of image 2 is stored in the memory of unit 221. After that, when a receiver receives a PLAY control signal after a plurality of still images are output from the transmitter, the signal 2 from the signal selection storage unit 221 is displayed at the timing (reproduction timing) of the vertical synchronization signal after the PLAY. A still image is output to the display 401 as an HDMI moving image signal. The display 401 displays the still image of the image 2 in synchronization with the reproduction timing.

  Similarly, the signal selection storage unit 222 of the second receiver 202 stores the signal of the second receiver 202 at the timing of vertical synchronization immediately after the transmission of the image 3 in the signal output from the transmitter, as shown in FIG. The still image of image 3 is stored in the memory of the signal selection storage unit 222. After that, after a plurality of still images are output from the transmitter, when the receiver receives a PLAY control signal, the timing of the vertical synchronization signal (playback timing) after PLAY is changed from the signal selection storage unit 222 to the image 3. The still image is output to the display 402 as an HDMI moving image signal. The display 402 displays a still image of the image 3 in synchronization with the reproduction timing.

  Similarly, the signal selection storage unit 223 of the third receiver 203 stores the signal of the third receiver 203 at the timing of vertical synchronization immediately after the transmission of the image 2 in the signal output from the transmitter, as shown in FIG. The still image of the image 2 is stored in the memory of the signal selection storage unit 223. Thereafter, after a plurality of still images are output from the transmitter, when the receiver receives a PLAY control signal, the signal selection storage unit 223 outputs the image 2 at the timing of the vertical synchronization signal (playback timing) after the PLAY. The still image is output to the display 403 as an HDMI moving image signal. The display 403 displays the still image of the image 2 in synchronization with the reproduction timing.

  The displays 401, 402, and 403 are set so that the delay time from video input to display is set to be the same, so that the display is switched to the images of still image 2, still image 3, and still image 2 simultaneously and simultaneously. Will be.

[2-3. Effect]
As described above, in the present embodiment, the transmitter 100 that inputs a plurality of still images and the first receiver 201 that extracts and stores still images of frames based on the setting information set in advance by the controller 113. , Second receiver 202, third receiver 203, and displays 401, 402, 403 for displaying images from the receiver, respectively. Video inputs and outputs of the first receiver 201, the second receiver 202, and the third receiver 203 are connected in a daisy chain. The first receiver 201, the second receiver 202, and the third receiver 203 select a still image specified in the control information set in advance by the controller 113 and store it in the memory. By switching the video signals from the first receiver 201, the second receiver 202, and the third receiver 203 at the same vertical synchronization timing on a plurality of displays, the images on the displays 401, 402, and 403 are simultaneously synchronized. 2, image 3, and image 2 are displayed.

(Other embodiments)
As described above, Embodiments 1 and 2 have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments that have been changed, replaced, added, omitted, and the like. Moreover, it is also possible to combine each component demonstrated in the said Embodiment 1-2 and it can also be set as a new embodiment.

  Therefore, other embodiments will be exemplified below.

  In Embodiments 1 and 2, HDBaseT has been described as an example of a method of transmitting a signal by connecting a transmitter to a plurality of receivers in a daisy chain. The modulation / demodulation method has a small time delay required for compression and decoding in the transmission of the video signal, and the transmission path connected by the daisy chain only needs to be a transmission method with a small time delay in transmission / reception transmission. Specifically, if the time difference between video switching caused by the delay required for compression and decoding and the delay in transmission between displays due to daisy chain connection is such that the human eye does not feel strange, there is a problem. Does not occur. Therefore, the modulation / demodulation and transmission scheme is not limited to HDBaseT. However, if HDBaseT is used as the transmission path, the distance of the transmission path between the transmitter and the receiver can be increased to about 100 meters, and it is easy to arrange a plurality of displays in free places. There is. As another method, transmission between the transmitter and the receiver may be transmitted by HDMI. If HDMI is used as a transmission means, it is not necessary to convert a video signal, and a transmitter and a receiver can be manufactured at a low cost. However, when a controller is arranged in the transmitter, it is necessary to provide a transmission means for transmitting a control signal separately from the HDMI in the transmission path.

  In the first and second embodiments, three still image sources and three receivers and displays have been described as an example. This is to make the explanation easy to understand. If there are a plurality of still image sources, receivers, and displays, the number can be freely determined. However, in the signal conversion circuit 111, it is necessary to use a larger number of frames for allocating still images to the moving image format than the number of still image sources.

  In the first and second embodiments, the resolution of the still image and the resolution of the display are both described as an example of 1920 × 1080. This is merely an example of the resolution of a commonly used moving image format, and may be a resolution of another moving image format such as 1280 × 720, 3840 × 2160, for example. When operating at a lower resolution, the capacity of the memory for storing still images can be reduced, and the transmission capacity per unit time passing through the transmission path can be reduced. On the other hand, when operating at a higher resolution, it has the effect of providing high-definition image quality.

In the first and second embodiments, an example has been described in which the receiver and the display are respectively separate devices. In this case, in addition to a general display device, a portion to which the function of the receiver is added is an individual device, but the function of the receiver may be built in the display.
Since the receiver is built in the display, it can be provided at a lower cost than manufacturing the device individually, and it is not necessary to consider the arrangement of the receiver even when installing the device. Has the effect of being able to do things.

  The above-described embodiments are for illustrating the technique in the present disclosure, and various modifications, replacements, additions, omissions, and the like can be made within the scope of the claims and their equivalents.

  The present disclosure can be applied to a system that simultaneously displays timings when displaying individual still images on a plurality of displays. Specifically, the present disclosure is applicable to a transmitter, a receiver, a display, and the like for a commercial signage market that collectively manages and operates a plurality of signage monitors.

DESCRIPTION OF SYMBOLS 100 Transmitter 101,102,103 Still image source 111 Signal conversion circuit 112 HDBaseT transmission part 113 Controller 201 1st receiver 202 2nd receiver 203 3rd receiver 211,212,213 HDBaseT reception part 221,222,223 signal Selection storage unit 231, 232, 233 HDBaseT transmission unit 301 Transmission path 401, 402, 403 Display

Claims (4)

A signal conversion circuit for converting a series of still images related to each other and a reproduction timing signal for setting the reproduction timing of the still image into a signal of a predetermined moving image format, and a signal input from the signal conversion circuit are transmitted. A transmitter comprising a signal transmission unit that performs
A signal receiving unit that receives a signal, a signal selection storage unit that selects and extracts a preset still image from a signal input to the signal receiving unit, and a signal received by the signal receiving unit A receiver comprising a signal transmission unit for transmission;
A display for displaying a still image selected by the signal selection storage unit of the receiver,
A plurality of the receivers are connected by a daisy chain by a transmission line, and a signal is supplied from a signal transmitter of the transmitter. Each receiver receives each still image from the reproduction timing. A still image transmission / reception synchronized playback apparatus that reads out from the signal selection storage unit based on a signal and plays back the same on each display at the same timing.   The still image transmission / reception synchronized playback device according to claim 1, wherein the transmitter includes a controller that supplies a control signal for controlling which still image is selected to the signal selection storage unit of the plurality of receivers.   The still image transmission / reception synchronized playback device according to claim 1, wherein the signal of the predetermined moving image format is a moving image format of an HDMI signal.   The stationary signal according to claim 3, wherein the signal transmission unit converts an HDMI signal into an HDBaseT signal and outputs the signal, and the signal reception unit converts the received HDBaseT signal into an HDMI signal. Image transmission / reception synchronized playback device.