CN105549931B - USB video splicing and playing system - Google Patents
USB video splicing and playing system Download PDFInfo
- Publication number
- CN105549931B CN105549931B CN201510918781.7A CN201510918781A CN105549931B CN 105549931 B CN105549931 B CN 105549931B CN 201510918781 A CN201510918781 A CN 201510918781A CN 105549931 B CN105549931 B CN 105549931B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
- G06F3/1431—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display using a single graphics controller
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
- G06F3/1446—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Multimedia (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Computer Graphics (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
The invention relates to a display control technology, and provides a USB video splicing and playing system, which realizes synchronous video playing of a spliced screen in a splicing mode. The control platform and all the spliced screens are sequentially connected in series by using communication lines, and working circuits of the spliced screens comprise interface circuits and main chip circuits; each interface circuit divides an input signal into two paths, one path is connected to the main chip circuit, the other path is connected to the next spliced screen, and particularly, the interface circuit of the first spliced screen also sends a synchronous instruction generated by the main chip circuit of the first spliced screen to the next spliced screen; each main chip circuit is used for receiving the signal from the interface circuit and playing the video according to the signal, and particularly, the main chip circuit of the first splicing screen generates a synchronous instruction for the subsequent splicing screen. The invention is suitable for the spliced screen playing system.
Description
Technical Field
The invention relates to a display control technology, in particular to a USB video splicing and playing system.
Background
The spliced screen is provided with a very narrow frame, a plurality of spliced screens are arranged in rows and columns to form an oversized spliced display wall, and the spliced screen is widely applied to the fields of security monitoring, media playing and the like.
The control lines are sequentially connected in series when the splicing screens in the splicing wall are used, the centralized control platform is used for carrying out unified control through the control lines, and the splicing screens can work in a single-screen mode or in a splicing mode according to control instructions sent by the control platform. In the single-screen mode, all input signal pictures are displayed on the screen by each splicing screen, and in the splicing mode, each splicing screen intercepts the appointed picture area of an input signal according to the position of the splicing screen in the splicing wall to display, so that the whole splicing wall displays a large picture.
The splicing screen generally has interfaces such as USB, VGA, HDMI, DVI, when using the video file in USB interface memories such as USB interface with splicing mode broadcast USB flash disk, because reasons such as the inside clock frequency of every splicing screen is different, USB memory internal parameter difference can cause that the video picture is asynchronous between the different splicing screens, therefore all generally only uses single screen mode work when splicing screen USB broadcasts.
When the advertisement video needs to be played in the splicing mode, a scheme of using a player and a distributor is commonly used, for example, a U-disk player is used to play the advertisement video in a U-disk first, the player outputs an HDMI video signal to the HDMI distributor, the HDMI distributor outputs multiple paths of HDMI signals to be connected to multiple splicing screens of a splicing wall, and the splicing screens display in the splicing mode. Taking a spliced wall with M rows and N columns as an example, in this scheme, 1U-disk player, 1 signal distributor, and M × N +1 signal lines are required in addition to the spliced wall, and the whole system is complex, high in cost, and low in reliability. Figure 1 shows a system connection block diagram of such a scheme.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the USB video splicing and playing system is provided, and synchronous video playing of a spliced screen in a splicing mode is achieved.
In order to solve the problems, the invention adopts the technical scheme that: the USB video splicing and playing system comprises a control platform and a plurality of spliced screens, wherein the control platform and all the spliced screens are sequentially connected in series by using communication lines, the spliced screen connected with the control platform is a first spliced screen, and the spliced screen connected behind the first spliced screen is a subsequent spliced screen; all the working modes of the spliced screens are spliced mode working, and all the working circuits of the spliced screens comprise interface circuits and main chip circuits;
the interface circuit of the first spliced screen is used for dividing an input control signal into two paths, wherein one path is connected to the main chip circuit of the first spliced screen, and the other path is connected to the next spliced screen; the synchronous instruction generated by the main chip circuit of the first spliced screen is sent to the next spliced screen;
the interface circuit of the subsequent spliced screen is used for dividing the input control signal and the input synchronous signal into two paths, wherein one path is connected to the main chip circuit of the subsequent spliced screen, and the other path is connected to the next spliced screen;
the main chip circuit of the first spliced screen is used for receiving the control signal from the interface circuit and playing the video according to the control signal; the interface circuit is also used for generating a synchronous instruction for the subsequent spliced screen and sending the synchronous instruction to the first spliced screen;
and the main chip circuit of the subsequent spliced screen is used for receiving the control signal and the synchronous instruction from the interface circuit and playing the video according to the control signal and the synchronous instruction.
Further, the synchronization instruction includes a current video playing time of the first mosaic screen.
Furthermore, the video played by the spliced screen is a USB video.
The invention has the beneficial effects that: the main chip circuit in the first spliced screen sends a synchronization instruction to the subsequent spliced screen, and the subsequent spliced screen plays video according to the synchronization instruction, so that the USB playing function of the spliced screen can be used in a splicing mode, the same function of a player + distributor scheme is achieved, and the whole system is simple and reliable.
Drawings
FIG. 1 is a connection block diagram of a conventional video splicing playing system;
FIG. 2 is a block diagram of the system of the present invention;
fig. 3 is an internal block diagram of the tiled screen of the present invention.
Detailed Description
The invention provides a USB playing synchronization system and a USB playing synchronization method, which solve the problem that videos are not synchronized in the playing process due to the fact that no synchronization mechanism exists when a plurality of splicing screens in a splicing wall are spliced to play USB videos at present, and the scheme is explained in detail with reference to the attached drawings.
As shown in fig. 2, in the implementation of the present invention, all splices on the splice wall are sequentially connected in series from the 1 st splice screen only by using the control line, the 1 st splice screen is connected to the centralized control platform, and the centralized control platform controls all splice units in the splice wall to perform USB splice playing.
As shown in fig. 3, all the working circuits of the tiled screen include an interface circuit and a main chip circuit. The interface circuit not only forwards the control signal sent by the centralized control platform or the previous spliced screen to the next spliced screen, but also can transmit the control signal generated by the internal main chip circuit to the next spliced screen, so that a passage is provided for synchronous control signal transmission.
When the spliced wall starts USB splicing playing, the 1 st spliced screen sends a synchronous instruction to the following spliced screen at regular time, the synchronous instruction contains the current video playing time of the 1 st screen, all the following screens jump to the appointed time in the instruction after receiving the synchronous instruction to continue playing the video, and thus all the spliced screens in the spliced wall play the video according to the same video time, and synchronous playing is realized.
The foregoing describes the general principles and features of the present invention and, together with the general principles of the invention, further modifications and improvements thereto, may be made without departing from the spirit and scope of the invention as set forth in the appended claims.
Claims (2)
- The USB video splicing and playing system comprises a control platform and a plurality of spliced screens, wherein the control platform and all the spliced screens are sequentially connected in series by using communication lines, the spliced screen connected with the control platform is a first spliced screen, and the spliced screen connected behind the first spliced screen is a subsequent spliced screen;the interface circuit of the first spliced screen is used for dividing an input control signal into two paths, wherein one path is connected to the main chip circuit of the first spliced screen, and the other path is connected to the next spliced screen; the synchronous instruction generated by the main chip circuit of the first spliced screen is sent to the next spliced screen;the interface circuit of the subsequent spliced screen is used for dividing the input control signal and the input synchronous signal into two paths, wherein one path is connected to the main chip circuit of the subsequent spliced screen, and the other path is connected to the next spliced screen;the main chip circuit of the first spliced screen is used for receiving the control signal from the interface circuit and playing the USB video according to the control signal; the interface circuit is also used for generating a synchronous instruction for the subsequent spliced screen and sending the synchronous instruction to the first spliced screen;and the main chip circuit of the subsequent spliced screen is used for receiving the control signal and the synchronous instruction from the interface circuit and playing the USB video according to the control signal and the synchronous instruction.
- 2. The USB video splicing and playing system according to claim 1, wherein the synchronization instruction includes a current video playing time of the first splicing screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510918781.7A CN105549931B (en) | 2015-12-10 | 2015-12-10 | USB video splicing and playing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510918781.7A CN105549931B (en) | 2015-12-10 | 2015-12-10 | USB video splicing and playing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105549931A CN105549931A (en) | 2016-05-04 |
| CN105549931B true CN105549931B (en) | 2020-02-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510918781.7A Active CN105549931B (en) | 2015-12-10 | 2015-12-10 | USB video splicing and playing system |
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| Country | Link |
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| CN (1) | CN105549931B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111208965B (en) * | 2020-01-15 | 2023-09-22 | 宁波Gqy视讯股份有限公司 | Spliced display system and display method thereof |
| CN113271487B (en) * | 2021-05-11 | 2023-07-07 | 深圳创维－Rgb电子有限公司 | Audio and video synchronous playing method, device, system, program product and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872605A (en) * | 2010-06-28 | 2010-10-27 | 浙江红苹果电子有限公司 | Method and device for jointing display screens |
| CN102097085A (en) * | 2010-12-25 | 2011-06-15 | 广东威创视讯科技股份有限公司 | Method and device for identifying system spliced by multiple display units |
| CN104483849A (en) * | 2014-10-28 | 2015-04-01 | 广州视源电子科技股份有限公司 | Multi-master control module connecting structure, identification method thereof and splicing wall |
| CN104505056A (en) * | 2014-12-26 | 2015-04-08 | 广东威创视讯科技股份有限公司 | LED unit splicing system and address routing method thereof |
-
2015
- 2015-12-10 CN CN201510918781.7A patent/CN105549931B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872605A (en) * | 2010-06-28 | 2010-10-27 | 浙江红苹果电子有限公司 | Method and device for jointing display screens |
| CN102097085A (en) * | 2010-12-25 | 2011-06-15 | 广东威创视讯科技股份有限公司 | Method and device for identifying system spliced by multiple display units |
| CN104483849A (en) * | 2014-10-28 | 2015-04-01 | 广州视源电子科技股份有限公司 | Multi-master control module connecting structure, identification method thereof and splicing wall |
| CN104505056A (en) * | 2014-12-26 | 2015-04-08 | 广东威创视讯科技股份有限公司 | LED unit splicing system and address routing method thereof |
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| Publication number | Publication date |
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| CN105549931A (en) | 2016-05-04 |
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