KR101724430B1 - Synchronization apparatus and method for led imaging apparatus - Google Patents

Synchronization apparatus and method for led imaging apparatus Download PDF

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KR101724430B1
KR101724430B1 KR1020160120045A KR20160120045A KR101724430B1 KR 101724430 B1 KR101724430 B1 KR 101724430B1 KR 1020160120045 A KR1020160120045 A KR 1020160120045A KR 20160120045 A KR20160120045 A KR 20160120045A KR 101724430 B1 KR101724430 B1 KR 101724430B1
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image
output unit
unit
delay value
image output
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KR1020160120045A
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Korean (ko)
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윤영산
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(주)베이직테크
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/12—Synchronisation between the display unit and other units, e.g. other display units, video-disc players

Abstract

The present invention relates to a synchronization apparatus and method for an LED image apparatus. The synchronization apparatus comprises a first image output unit and second image output units connected to the first image output unit. In this case, the first image output unit comprises: a unit amount determination unit which checks connections of the second image output units when an image is received from one of the second image output units connected to a final end and which determines the number of the second image output units; a delay value calculation unit which calculates a delay value based on an original image, input to the first image output unit, and an image received from each of the second image output units in response to transmission of the corresponding original image; an image regeneration unit which regenerates an image by inserting information about the delay value; and an image transmission unit which transmits the regenerated image to the second image output units.

Description

TECHNICAL FIELD [0001] The present invention relates to a synchronization apparatus and method for an LED image device,

The present invention relates to a video output synchronization technique, and more particularly, to an apparatus and method for synchronizing an LED image device that synchronizes image output between LED units in an LED display system.

Recently, a higher display resolution is required and accordingly, an increase in the number of units for an LED display is required. It is necessary to divide and output the entire image to be displayed to a plurality of units with the restriction of the number of pixels of the basic unit, and it is necessary to synchronize output of the plurality of LED units in time. However, the connection of the LED unit of the LED display system is in the form of a daisy chain, and there is a problem that a delay occurs in transmission, reception and reception processing of image data between the units.

Korean Patent Laid-Open Publication No. 10-2004-0107193 discloses a technique for displaying a real-time multi-screen graphic image and generating and displaying a high-quality synchronized graphic image on a plurality of multi-screens in real time. However, A technique for displaying a graphic image on the screen in consideration of the three-dimensional arrangement (position and angle) of the screen, and a technique for synchronizing output between screens are not disclosed, It still exists.

Korean Patent Publication No. 10-2004-0107193

It is an object of the present invention to provide a synchronization device for synchronizing the video output of a video output unit through a compensation process for delaying video data streaming applied to each video output unit in a synchronization device such as an LED display device.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for automatically serializing a serial number (e.g., address) for identifying a video output unit when a plurality of video output units constituting a synchronization device such as an LED display device are configured in a daisy- And a synchronization device for automatically detecting and correcting a delay caused by a video transmission between the video output units.

According to a first aspect of the present invention, there is provided a synchronizing apparatus comprising a first video output unit and a second video output unit connected to the first video output unit, A unit number verifying unit for confirming the connection of the second video output unit and determining the number of the second video output units upon receiving the video output from the second video output unit connected to the final stage of the two video output units; A delay value calculating unit for calculating a delay value based on the original image input to the first image output unit and the image received from the second image output unit according to the transmission of the original image; An image regenerative unit for regenerating an image by inserting information about the delay value; And an image transmission unit for transmitting the regenerated image to the second image output unit.

Preferably, the number-of-units checking unit may determine the number of the second video output units based on a serial number inserted in an image received from the second video output unit connected to the final end.

Preferably, the delay value calculator includes: a first storage module for storing an original image input to the first image output unit; A second storage module for storing an image received from a second video output unit connected to the final stage; An overall delay calculation module for detecting a delay between the original image and the received images and calculating an overall delay value; And a delay value calculating module for calculating a delay value for each of the second video output units based on the total delay value and the number of the second video output units.

The image regenerating unit may regenerate the image by inserting the serial number and the delay value of each of the second image output units into the image and inserting the serial number of the first image output unit itself.

According to a second aspect of the present invention, there is provided a synchronization apparatus comprising a first video output unit and a second video output unit connected to the first video output unit, A video input unit for receiving video from the video output unit; An image processing unit that extracts a delay value from the image, corrects the image according to the delay value, and outputs the corrected image to the second image output unit; And an image transmission unit for transmitting the image to a connected image output unit.

The apparatus may further include a serial number generator for extracting a serial number from the image input through the image input unit, generating a new serial number by increasing the serial number, and inserting the new serial number into the image .

Preferably, the image processing unit extracts a delay value associated with the new serial number from the image, and the image transmission unit may transmit the image in which the new serial number is inserted to the next image output unit.

Preferably, the image processor may process the image so that the image is output after being delayed by the delay value.

According to a third aspect of the present invention, there is provided a synchronization method performed in a first image output unit of a synchronization apparatus including a first image output unit and a second image output unit connected to the first image output unit, (a) when receiving an image output from a second image output unit connected to a final stage of the second image output unit, confirming a connection of the second image output unit and determining the number of the second image output unit ; (b) calculating a delay value based on the original image input to the first image output unit and the image received from the second image output unit according to the transmission of the original image; (c) reconstructing an image by inserting information about the delay value; And (d) transmitting the regenerated image to the second image output unit.

Preferably, the step (a) may include determining the number of the second image output units based on the serial number inserted in the image received from the second image output unit connected to the final stage.

Preferably, the step (b) includes the steps of: storing an original image to be input to the first image output unit; Storing an image received from a second image output unit connected to the final stage; Detecting a delay between the original image and the received image to calculate a total delay value; And calculating a delay value for each of the second video output units based on the total delay value and the number of the second video output units.

Preferably, in the step (c), a sequence number and a delay value for each of the second image output units are associated with each other and inserted into the image, and the serial number of the first image output unit itself is inserted to regenerate the image .

According to a fourth aspect of the present invention, there is provided a synchronization method performed in a second image output unit of a synchronization apparatus including a first image output unit and a second image output unit connected to the first image output unit, (a) receiving an image from a connected previous image output unit; (b) extracting a delay value from the image, correcting the image according to the delay value, and outputting the corrected image to the second image output unit; And (c) transmitting the image to a connected image output unit.

Preferably, the step (a) may include extracting a serial number from the input image; Increasing the serial number to generate a new serial number; And inserting the new serial number into the image.

Preferably, the step (b) includes a step of extracting a delay value associated with the new serial number from the image, and the step (c) includes the step of: And transmitting the data.

Preferably, the step (b) may include processing the image so that the image is output after being delayed by the delay value.

As described above, according to the present invention, an output delay that may occur in the video output of a plurality of video output units is corrected, and a time-synchronized image is output from a plurality of video output units constituting a synchronizing device such as an LED display device There is an effect that can be.

When a synchronizing device (for example, an LED image device) is constituted by a plurality of image output units, in the process of transmitting the entire image data from the original image source and transmitting it to the adjacent image output unit, However, according to the present invention, since the images output from the plurality of image output units are temporally synchronized, the problem that the output images of the respective image output units are temporally discordant on the screen displayed by the entire image is solved It is effective.

1 is a block diagram illustrating a synchronization apparatus according to a preferred embodiment of the present invention.
2 is a block diagram of the first video output unit of FIG.
3 is a block diagram of the delay value calculating unit of FIG.
4 is a block diagram of the second video output unit of FIG.
5 is a flowchart illustrating a synchronization method performed by the first image output unit of the synchronization apparatus of FIG.
6 is a flowchart illustrating a synchronization method performed by the second image output unit of the synchronization apparatus of FIG.
7 is an example of image data stored in the first image output unit to calculate the delay value.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will be more apparent from the following detailed description taken in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification. "And / or" include each and every combination of one or more of the mentioned items.

Although the first, second, etc. are used to describe various elements, components and / or sections, it is needless to say that these elements, components and / or sections are not limited by these terms. These terms are only used to distinguish one element, element or section from another element, element or section. Therefore, it goes without saying that the first element, the first element or the first section mentioned below may be the second element, the second element or the second section within the technical spirit of the present invention.

Also, in each step, the identification code (e.g., a, b, c, etc.) is used for convenience of explanation, and the identification code does not describe the order of each step, Unless the order is described, it may happen differently from the stated order. That is, each step may occur in the same order as described, may be performed substantially concurrently, or may be performed in reverse order.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

1 is a block diagram illustrating a synchronization apparatus according to a preferred embodiment of the present invention.

1, the synchronizing apparatus 100 includes a synchronizing apparatus 100 and an image generating unit 110. The synchronizing apparatus 100 includes a first image output unit 120 and a second image output unit 130. [

The synchronizing apparatus 100 is a device that includes a plurality of image output units and outputs one image as a whole through divided images outputted to each of the plurality of image output units. Preferably, the synchronization device 100 may correspond to a video output device for outputting an image, and may correspond to a large-sized LED display device used for digital signage, for example. Preferably, the synchronization apparatus 100 may receive an original image from the image generation unit 110, wherein the original image may correspond to image streaming data. In addition, the image generating unit 110 provides the image to the synchronizing apparatus 100.

The first image output unit 120 and the second image output unit 130 constitute the synchronization apparatus 100 and each output a divided image of the entire image. The first image output unit 120 may be connected to the image output unit which receives the image data input from the image generating unit 110 to the synchronizing apparatus 100 first among the image output units constituting the synchronizing apparatus 100 And the remaining video output units except for the first video output unit 120 correspond to the second video output unit 130. Here, the second video output unit 130 may be plural.

The first image output unit 120 and the second image output unit 130 are sequentially connected in a daisy chain manner and the second image output unit 130 connected to the final stage of the second image output unit 130 -n may be formed in a connection loop 140 so as to be connected to the first video output unit 120. [ Here, the connection loop 140 may be formed at the shortest distance. In addition, the delay of the image can be generated at the data transmission / reception terminal 150 between the video output units.

FIG. 2 is a block diagram of the first video output unit of FIG. 1, and FIG. 3 is a block diagram of the delay value calculating unit of FIG. 2. Referring to FIG.

2, the first image output unit 120 includes a unit number checking unit 210, a delay value calculating unit 220, an image regenerating unit 230, an image transmitting unit 240, a controller 250, .

Unit number confirmation unit 210 receives the image output from the second image output unit 130-n connected to the final stage of the second image output unit 130, the connection of the second image output unit 130 And determines the number of the second video output units 130. [ Preferably, the unit number verifying unit 210 determines the number of the second video output units 130 based on the serial number inserted in the video received from the second video output unit 130-n connected to the final stage . Here, the serial number inserted into the video is incremented in a counter manner every time the video is input to the video output unit 130, which will be described in detail below with reference to FIG.

That is, the unit number confirmation unit 210 compares the serial number inserted in the first video output unit 130 with the serial number inserted in the video received from the second video output unit 130-n connected to the final stage The number of the second video output units 130 can be determined.

The delay value calculating unit 220 calculates a delay value based on the original image input to the first image output unit 120 and the image received from the second image output unit 130-n in accordance with the transmission of the original image do. 3, the delay value calculating unit 220 may include a first storage module 221, a second storage module 222, an overall delay calculation module 223, and a delay value calculation module 224, . ≪ / RTI >

Specifically, the first storage module 221 stores the original image to be input to the first image output unit 120, and the second storage module 222 stores the second image output unit 130-n connected to the final stage. And stores the received image. The image may be stored in a storage space in the first image output unit 120 or may be stored in a separate storage device. 7, the original image may be stored in the first buffer 710, and the image received from the second image output unit 130-n may be stored in the second buffer 720. FIG.

The total delay calculation module 223 calculates the total delay value by detecting the delay between the original image and the received images, and the delay value calculation module 224 calculates the total delay value and the number of the second image output units 130 And calculates a delay value for each of the second video output units 130 based on the delay value. Here, the delays generated at the data transmitting / receiving end 150 of the first and second video output units 130 are the same, and the output from the second video output unit 130- The delay on the connection loop 140 transmitted to the unit 120 is considered to have a relatively small negligible value relative to the delay at the data transmission / reception terminal 150. [

7, the total delay calculation module 223 may calculate the total delay calculated by the total delay calculator 223 from the original image stored in the first buffer 710 and the second delayed image data received from the second image output unit 130-n stored in the second buffer 720 The position 730 in the original image of the specific frame having the value of 0 and the position 740 in the image received from the second image output unit 130-n are compared based on the image to obtain the total delay value K . That is, the total delay value from the first video output unit 120 to the second video output unit 130-n connected to the final stage corresponds to K.

Next, if the number of the second image output units 130 is n, the delay value calculation module 224 can express the total delay value K as shown in the following [Expression 1] The delay value for each of the second video output units 130 can be calculated.

[Equation 1]

Figure 112016090985103-pat00001

[Equation 2]

Figure 112016090985103-pat00002

Here, K is the total delay value, D is the unit delay value, n is the number of the second video output units,? Is the delay value in the connection loop 140, and the unit delay value D in? Let n be the integer value.

If the total delay value K and the unit delay value D are calculated through the equations 1 and 2 and the number of the second video output units is n, the delay value calculation module 224 is connected to the final stage The first and second image output units 120 and 130 output the images at the same time in accordance with the output time of the images in the second image output unit 130- (K), (K- (D * 2)), (K- (D * 3)), and the delay value for each of the second image output units 130 sequentially connected next. , The delay value of the second video output unit 130-n connected to the final stage can be calculated as (K- (D * (n-1)), The second video output unit 130-n connected to the final stage is not connected to the video output unit 130-n without delay, since the (K- (D * n) The first image output unit 120 outputs the image after delaying the image by K, and each of the second image output units 130 sequentially connected next outputs the image by (KD), ( (D * 2)), (K- (D * 3)), ..., (K- (D * n = K), all the first and second image output units 120 and 130 included in the synchronization apparatus 100 output images at the same time, so that the images can be synchronized.

The image regenerating unit 230 regenerates the image by inserting information on the delay value. Preferably, when the delay value for each of the video output units is calculated, the video reproducibility unit 230 generates a video output unit having a serial number for each video output unit and a video output It is possible to reproduce the image to be provided to the second image output unit 130 by inserting the information related to the delay value of the unit into the original image and inserting the serial number of the first image output unit 120 itself. Here, the regenerated image may correspond to a delay-compensated image reflecting the delay value of each image output unit. Also, the regenerated image may be output after being delayed by the delay value in the first image output unit 120 itself.

The image transmitting unit 240 transmits the regenerated image to the second image output unit 130. That is, if the serial number and delay value information of each of the second image output units 130 and the serial number of the first image output unit 120 are included in the image by the image transmission unit 240, The regenerated images are sequentially transmitted to the second image output unit 130 so that each second image output unit 130 can extract the serial number, delay value information, and image information.

The control unit 250 controls the operation of the unit number confirmation unit 210, the delay value calculation unit 220, the image reproducibility unit 230, and the image transmission unit 240 and the flow of data.

4 is a block diagram of the second video output unit of FIG.

4, the second image output unit 130 includes an image input unit 410, a serial number generation unit 420, an image processing unit 430, and an image transmission unit 440. Hereinafter, the second image output unit 130, the following of the description based on the second image output unit (130-S n) associated with S n-th and the description is equally applicable to other second video output unit 130 .

Image input unit 410 is a second video display unit a second image output unit (130-S n - 1) is connected to the former (130-S n) is input from the image. Here, when the second video output unit 130-S n is connected immediately after the first video output unit 120, an image can be input from the first video output unit 120, and in this case, The same can be applied to the following description.

The image processing unit 430 extracts a delay value from the image received from the second image output unit 130-S n - 1 , and processes the image so that the image is corrected according to the delay value. Preferably, the image processor 430 may extract a delay value associated with a new serial number generated through the serial number generator 420, which will be described below, from the input image. As described with reference to FIGS. 2 and 3, after the first image output unit 120 reproduces the image in which the serial number and the delay value are inserted from the original image, the reproduced image is output to the second image output unit The second image output unit 130 can extract a delay value associated with the serial number of the corresponding image output unit 130 or a corresponding delay value from the input image. Then, the image processing unit 430 may process the image so that the image is output from the second image output unit 130-S n after the image is delayed by the delay value.

Image transmission unit 440 transmits the image to the next second image output unit (130-S n + 1) connected to the second image output unit (130-S n). Here, when the second video output unit 130-S n is the second video output unit connected to the end, the video can be transmitted to the first video output unit 120.

Preferably, the image transmission unit 440 extracts image information and delay value information for synchronization from the image input from the second image output unit 130-S n - 1 , 420 to the second image output unit 130-S n + 1 that is connected next.

The second image output unit 130-Sn may include a serial number generation unit 420. The serial number generation unit 420 extracts a serial number from the image input through the image input unit 410, A new serial number may be generated by increasing the serial number, and a new serial number may be inserted into the image through the image processor 430. Here, the image with the new serial number inserted is transmitted to the next second image output unit 130-S n + 1 through the image transmission unit 440.

That is, since a new serial number is inserted into the image sequentially transmitted to the second image output unit 130 through the serial number generation unit 420 of each of the second image output units 130, The serial number output from the video output unit 130-n and input to the first video output unit 120 is inserted with the serial number increased by the number of the second video output unit 130. Accordingly, the number-of-units checking unit of the first video output unit 120 described above can determine the number of the second video output units 130 by checking the serial number.

In addition, the operation performed through the serial number generator 420 is performed each time an image is input, so that a delay value matching the order of the specific image output unit itself can be extracted from the input image. However, the operation performed by the unit number confirmation unit of the first image output unit 120 based on the serial number may be performed by the control unit of the first image output unit 120 or the control unit provided separately from the second image output unit 130 Lt; RTI ID = 0.0 > of the < / RTI > connection is detected.

4, the second image output unit 130 includes an image input unit 410, a serial number generation unit 420, an image processing unit 430, and an image transmission unit 440, And a control unit for controlling the flow.

5 is a flowchart illustrating a synchronization method performed by the first image output unit of the synchronization apparatus of FIG.

Unit number confirmation unit 210 receives the image output from the second image output unit 130-n connected to the final stage of the second image output unit 130, the connection of the second image output unit 130 And determines the number of second video output units (step S510).

Preferably, before step S510, an image is input from the image generating unit 110 to the first image output unit 120, and sequentially from the first image output unit 120 to the second image output unit 130 The serial number is newly generated and inserted into the video transmitted by the serial number generator 420 of the second video output unit 130. Therefore, the unit number verifier 210 newly generates a serial number, N from the second image output unit 130-n, and determines the number of the second image output unit 130 by checking the serial number of the received image.

Preferably, step S510 may be performed when it is sensed that the connection relationship of the second video output unit 130 is changed, and the video output from the second video output unit 130-n connected to the final end is received It is not performed every time. Here, the change of the connection relationship of the second image output unit 130 may be performed by a control unit or a control unit in the interior or exterior of the control unit 250 of the first image output unit 130 or the synchronization device 100 Can be detected.

The delay value calculating unit 220 calculates a delay value based on the original image input to the first image output unit 120 and the image received from the second image output unit 130 according to the transmission of the original image In step S520, the image reproducibility unit 230 inserts information on the delay value to reproduce the image (step S530), and the image transmission unit 240 transmits the reproduced image to the second image output unit (step S540 ).

Preferably, steps S520 to S540 may be performed each time the first image output unit 120 transmits an image received from the image generator 110 to the second image output unit 130, The unit 120 may calculate the delay value in real time and insert a new delay value when the delay value is changed so that the reproduced image is transmitted to the second image output unit 130. [

6 is a flowchart illustrating a synchronization method performed by the second image output unit of the synchronization apparatus of FIG.

The image input unit 410 receives an image from the connected previous image output unit 130 in step S610 and the image processing unit 430 extracts a delay value from the image and corrects the image according to the delay value (Step S620).

That is, when an image in which the information on the serial number and the delay value is inserted through the steps S520 to S540 of FIG. 5 is transmitted from the first image output unit 120 to the second image output unit 130, Each of the first image output unit 130 and the second image output unit 130 extracts a serial number from the image received from the previous image output unit, generates a new serial number, extracts a delay value associated with the new serial number, The image to be output is delayed by the delay value and then output.

Then, the image transmitting unit 440 transmits the image having the new serial number inserted thereto to the connected image output unit (step S630). Then, the image output unit 130 also extracts the delay value as described above, . In one embodiment, when the next image output unit is the first image output unit 120, the first image output unit 120 performs steps S520 through 540 after the image is transmitted to the first image output unit 120 .

When the steps S610 to S630 are performed in each of the second image output units 130, the image sequentially transmitted through the second image output unit 130 is transmitted to the second image output unit 130-n, An image delayed by a delay value in each of the first image output unit 120 and the second image output unit 130 is simultaneously output.

Preferably, when an image is input to the second image output unit 130-n connected to the final stage and simultaneously synchronized images are output through the first and second image output units 120 and 130, The image output from the second image output unit 130-n is again transmitted to the first image output unit 120 and the first image output unit 120 receives the image from the second image output unit 130- And performs steps S520 to S540 of FIG. 5 again based on the image.

Meanwhile, the synchronization method according to an embodiment of the present invention can also be implemented as computer-readable code on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored.

For example, the computer-readable recording medium includes a ROM, a RAM, a CD-ROM, a magnetic tape, a hard disk, a floppy disk, a removable storage device, a nonvolatile memory, , And optical data storage devices.

In addition, the computer readable recording medium may be distributed and executed in a computer system connected to a computer network, and may be stored and executed as a code readable in a distributed manner.

Although the preferred embodiments of the synchronizing apparatus and the synchronizing method according to the present invention have been described above, the present invention is not limited thereto, and various modifications and changes may be made within the scope of the claims, And this also belongs to the present invention.

100: synchronization device 110:
120: First image output unit 130: Second image output unit
140: connection loop 150: data transmission / reception stage
210: unit number confirmation unit 220: delay value calculation unit
230: Image reproduction unit 240: Image reproduction unit
250:
221: first storage module 222: second storage module
223: total delay calculation module 224: delay value calculation module
410: image input unit 420: serial number generation unit
430: image processor 440:

Claims (16)

A synchronization device comprising a first video output unit and a second video output unit connected to the first video output unit,
Wherein the first video output unit comprises: a unit number confirmation unit for receiving the video output from the second video output unit connected to the final stage of the second video output unit and determining the number of the second video output units; A delay value calculating unit for calculating a delay value based on the original image input to the image output unit and the image received from the second image output unit in accordance with the transmission of the original image; An image regenerative unit for regenerating an image by inserting information about the delay value; And an image transmission unit for transmitting the regenerated image to the second image output unit,
Wherein the second image output unit comprises: an image input unit receiving an image from which the information about the delay value regenerated by the first image output unit is inserted, from a previous image output unit connected to the image output unit; An image processing unit that extracts a delay value from the image, corrects the image according to the delay value, and outputs the corrected image to the second image output unit; And an image transmission unit for transmitting the image to a connected next image output unit.
The apparatus according to claim 1, wherein the unit number verifying unit
And determines the number of the second video output units based on the serial number inserted in the video received from the second video output unit connected to the final end Synchronization device.
2. The apparatus of claim 1, wherein the delay value calculating unit
A first storage module for storing an original image input to the first image output unit;
A second storage module for storing an image received from a second video output unit connected to the final stage;
An overall delay calculation module for detecting a delay between the original image and the received images and calculating an overall delay value; And
And a delay value calculation module for calculating a delay value for each of the second video output units based on the total delay value and the number of the second video output units.
The apparatus of claim 1, wherein the image regenerating unit
Wherein the synchronization unit inserts the serial number and the delay value for each of the second image output units into the image and inserts the serial number of the first image output unit itself to regenerate the image.
delete The apparatus according to claim 1, wherein the second video output unit
Further comprising a sequence number generator for extracting a sequence number from an image input through the image input unit, generating a new sequence number by increasing the sequence number, and inserting the new sequence number into the image Device.
The method according to claim 6,
Wherein the image processor extracts a delay value associated with the new serial number from the image,
Wherein the image transmitting unit transmits the image in which the new serial number is inserted to the next image output unit.
The apparatus of claim 1, wherein the image processing unit
And processes the image so that the image is output after being delayed by the delay value.
A synchronization method performed by a synchronization apparatus comprising a first image output unit and a second image output unit connected to the first image output unit,
(a) receiving the image output from the second image output unit connected to the final stage of the second image output unit, and determining the number of the second image output units;
(b) calculating a delay value based on the original image input to the first image output unit and the image received from the second image output unit according to the transmission of the original image;
(c) the first image output unit includes the steps of: regenerating an image by inserting information on the delay value;
(d) the first video output unit transmitting the regenerated video to the second video output unit;
(e) the second video output unit comprises: an input step of receiving, from a connected previous video output unit, an image in which information about the delay value reproduced by the first video output unit is inserted;
(f) the second image output unit extracts a delay value from the image, corrects the image according to the delay value, and outputs the corrected image to the second image output unit; And
(g) the second image output unit transmitting the image to a connected next image output unit.
10. The method of claim 9, wherein step (a)
Confirming the connection of the second video output unit and determining the number of the second video output units based on the serial number inserted in the video received from the second video output unit connected to the final end Lt; / RTI >
10. The method of claim 9, wherein step (b)
Storing an original image to be input to the first image output unit;
Storing an image received from a second image output unit connected to the final stage;
Detecting a delay between the original image and the received image to calculate a total delay value; And
And calculating a delay value for each of the second video output units based on the total delay value and the number of the second video output units.
10. The method of claim 9, wherein step (c)
Inserting a serial number and a delay value for each of the second image output units into the image and inserting the serial number of the first image output unit itself to regenerate the image.
delete 10. The method of claim 9, wherein after step (e)
Extracting a serial number from the input image;
Increasing the serial number to generate a new serial number;
And inserting the new serial number into the image.
15. The method of claim 14,
Wherein the step (f) includes extracting a delay value associated with the new serial number from the image,
Wherein the step (g) comprises transmitting an image in which the new serial number is inserted to a next image output unit.
10. The method of claim 9, wherein step (f)
And processing the image so that the image is output after being delayed by the delay value.
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