CN111586454A

CN111586454A - Large screen splicing synchronization method and system

Info

Publication number: CN111586454A
Application number: CN202010437111.4A
Authority: CN
Inventors: 袁永平; 杨顶东; 朱龙龙; 李金凯; 刘加洋
Original assignee: Shanghai Dayin Multimedia Technology Co ltd
Current assignee: Shanghai Dayin Multimedia Technology Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-08-25
Anticipated expiration: 2040-05-21
Also published as: CN111586454B

Abstract

The application relates to a large-screen splicing synchronization method and system, and relates to the technical field of computer multimedia. The method comprises the following steps: modifying at least two decoder board card structures and correspondingly installing the decoder board card structures inside at least two screens; setting a decoder as a main node, and acquiring crystal oscillation time of all the decoders through the main node; setting time labels of all crystal oscillators, and enabling the time label of each crystal oscillator to correspond to one frame of picture; the time labels of all crystal oscillators are corrected through the main node, and each decoder caches at least one frame of picture; the main node is used as an initial time coordinate, and the crystal oscillator time of the main node is sent to the crystal oscillators of other decoders; and synchronously playing the pictures corresponding to the time labels of the crystal oscillators according to the initial time coordinates. According to the large-screen splicing synchronization method and system, the decoder board card structures are modified, the large-screen splicing is achieved through butt joint and installation in various large screens, the network cable is accessed into the network, the synchronization function is achieved, and user experience is improved.

Description

Large screen splicing synchronization method and system

Technical Field

The application relates to the technical field of computer multimedia, in particular to a large-screen splicing synchronization method and system.

Background

With the coming of the information era, the rapid development of computer multimedia technology and the wide application of network technology, from the establishment of command monitoring centers and network management centers to the proceeding of conferences and technical lectures, the display effect of large pictures, multiple colors, high brightness and high resolution needs to be obtained, and the traditional display is difficult to meet the requirements of users in multiple aspects. In the context of intelligent informatization construction, Cloud Technology (Cloud Technology) is a generic term for network Technology, information Technology, integration Technology, management platform Technology, application Technology, and the like, which are based on Cloud computing model applications. Cloud Computing (Cloud Computing) is a distributed Computing method, and is a big data concept which is convenient, simple and shared as a resource interaction and information barrier-free transmission mode. Cloud splicing is a splicing display system based on a cloud computing technology, integrates and deepens the existing distributed splicing system in a physical form, changes the traditional complex application mode from acquisition to display, realizes the network technology distributed form of signal acquisition and display from the bottom layer, and achieves unified management and control of signal processing. The cloud splicing technology is the comprehensive embodiment of the current popular technologies such as internet +, internet of things, big data, intellectualization and the like, and a cloud splicing mode based on internet distributed processing becomes the mainstream of the future large-screen splicing technology.

At present, the existing splicing devices are mainly implemented by splicing processors or distributed decoders. The splicing processor has the problems that the risk of the system is high due to the centralized management problem, the expansion complexity is high, the cost is high, the construction is complex, and the transmission distance is limited by wires and the like. The distributed splicing has the problems of poor synchronism, complicated construction and the like, for example, different pictures and even tearing feeling (the phenomenon that one line is asynchronous in the signal source playing process) can appear after the large screen is spliced, and the like.

Therefore, it is desirable to provide a large-screen splicing synchronization method and system, which are implemented by modifying the board card structure of the decoder, installing the decoder in various large screens in a butt joint manner, realizing large-screen splicing through accessing a network through a network cable, completing a synchronization function, considering a video splicing synchronization function and debugging equipment between the large screens, and improving user experience.

Disclosure of Invention

According to a first aspect of some embodiments of the present application, there is provided a large-screen splicing synchronization method applied in a terminal (e.g., a cloud screen, a display terminal, etc.), the method may include: modifying at least two decoder board card structures and correspondingly installing the decoder board card structures inside at least two screens; setting a decoder as a main node, and acquiring crystal oscillation time of all the decoders through the main node; setting time labels of all crystal oscillators, and enabling the time label of each crystal oscillator to correspond to one frame of picture; the time labels of all crystal oscillators are corrected through the main node, and each decoder caches at least one frame of picture; the main node is used as an initial time coordinate, and the crystal oscillator time of the main node is sent to the crystal oscillators of other decoders; and synchronously playing the pictures corresponding to the time labels of the crystal oscillators according to the initial time coordinates.

In some embodiments, the at least two decoders are in one-to-one correspondence with the at least two screens, the method further comprising: outputting LVDS signals to a screen after decoding so as to light the screen; and debugging the screen color difference through a control signal of the LVDS.

In some embodiments, the decoding is performed by h.264 or h.265 protocols.

In some embodiments, the crystal oscillator is a component of a decoder, and one decoder corresponds to one crystal oscillator, and the crystal oscillator includes a high-precision crystal oscillator.

In some embodiments, the host node is configured by UM configuration software, the same system including a host node, the method further comprising: the decoders as the master node are distributed in the same system, and the master node synchronizes the clocks of all the decoders.

In some embodiments, the setting the time tags of all the oscillators further comprises: setting the time labels of the crystal oscillators to be 0 to 59, and respectively corresponding the time labels 0 to 59 to the 1 st frame picture to the 60 th frame picture of the decoder.

In some embodiments, the checking the time tags of all oscillators by the master node, and the buffering at least one frame of picture by each decoder further comprises: each decoder buffers 7 to 9 frames of pictures; and when the crystal oscillator time of each decoder is inconsistent, adjusting the picture of the playing buffer.

In some embodiments, the sending the crystal oscillator time of the master node to each of the other decoder crystal oscillators through the network data, and the synchronously playing the picture corresponding to the time tag of each crystal oscillator further includes: according to the initial time coordinate of the main node, completing the clock synchronization of the decoder corresponding to the time tags of all crystal oscillators; and transferring the pictures corresponding to the time labels of the crystal oscillators, and synchronously playing the pictures.

In some embodiments, the screen is a cloud screen, and includes DLP rear projection equipment, PDP plasma display panel, DID liquid crystal tiled screen, LCD, LED, OLED, LCD tiled display screen, LED full-color display screen, and projection fusion display.

According to a second aspect of some embodiments of the present application, there is provided a system comprising: modifying at least two decoder board card structures and correspondingly installing the decoder board card structures inside at least two screens; a memory configured to store data and instructions; a processor in communication with the memory, wherein the processor, when executing instructions in the memory, is configured to: setting a decoder as a main node, and acquiring crystal oscillation time of all the decoders through the main node; setting time labels of all crystal oscillators, and enabling the time label of each crystal oscillator to correspond to one frame of picture; the time labels of all crystal oscillators are corrected through the main node, and each decoder caches at least one frame of picture; the main node is used as an initial time coordinate, and the crystal oscillator time of the main node is sent to the crystal oscillators of other decoders; and synchronously playing the pictures corresponding to the time labels of the crystal oscillators according to the initial time coordinates.

Therefore, according to the large-screen splicing synchronization method and system of some embodiments of the application, the decoder board card structures are modified, the decoder board cards are installed in various large screens in a butt joint mode, large-screen splicing is achieved through a network access network, the synchronization function is completed, the video splicing synchronization function and equipment between large screens are both considered, and user experience is improved.

Drawings

For a better understanding and appreciation of some embodiments of the present application, reference will now be made to the description of embodiments taken in conjunction with the accompanying drawings, in which like reference numerals designate corresponding parts in the figures.

Fig. 1 is a system diagram of a stitching processor in the prior art.

Fig. 2 is a system diagram of distributed stitching in the prior art.

FIG. 3 is an exemplary diagram of the display tearing perception of distributed tiling in the prior art.

Fig. 4 is an exemplary schematic diagram of a large screen stitching synchronization system provided in accordance with some embodiments of the present application.

Fig. 5 is a schematic diagram of a specific large screen stitching synchronization system provided according to some embodiments of the present application.

Fig. 6 is an exemplary flow diagram of a large screen splice synchronization method provided in accordance with some embodiments of the present application.

Detailed Description

The following description, with reference to the accompanying drawings, is provided to facilitate a comprehensive understanding of various embodiments of the application as defined by the claims and their equivalents. These embodiments include various specific details for ease of understanding, but these are to be considered exemplary only. Accordingly, those skilled in the art will appreciate that various changes and modifications may be made to the various embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions will be omitted herein for brevity and clarity.

The terms and phrases used in the following specification and claims are not to be limited to the literal meaning, but are merely for the clear and consistent understanding of the application. Accordingly, it will be appreciated by those skilled in the art that the description of the various embodiments of the present application is provided for illustration only and not for the purpose of limiting the application as defined by the appended claims and their equivalents.

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings in some embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is to be understood that the terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only, and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. The expressions "first", "second", "the first" and "the second" are used for modifying the corresponding elements without regard to order or importance, and are used only for distinguishing one element from another element without limiting the corresponding elements.

A terminal according to some embodiments of the present application may be an electronic device, which may include one or a combination of several of a display terminal, a cloud screen, a personal computer (PC, e.g., tablet, desktop, notebook, netbook, PDA), a client device, a virtual reality device (VR), a renderer, a smartphone, a mobile phone, an e-book reader, a Portable Multimedia Player (PMP), an audio/video player (MP3/MP4), a camera, and a wearable device, etc. According to some embodiments of the present application, the wearable device may include an accessory type (e.g., watch, ring, bracelet, glasses, or Head Mounted Device (HMD)), an integrated type (e.g., electronic garment), a decorative type (e.g., skin pad, tattoo, or built-in electronic device), and the like, or a combination of several. In some embodiments of the present application, the terminal may be flexible, not limited to the above devices, or may be one or a combination of the above devices. In this application, the term "user" may indicate a person using the terminal or a device (e.g., an artificial intelligence electronic device) using the terminal.

The existing splicing equipment is mainly used for splicing through a splicing processor or a distributed decoder connection. Fig. 1 is a system diagram of a stitching processor in the prior art. As shown in fig. 1, the splicing processor has a centralized management problem and a high risk of the system, for example, the whole system is disabled and cannot be used after the core splicing processor fails. The cost is high, for example, when a signal source needs to be added or a large screen needs to be added in the later stage, only equipment needs to be added or equipment with a larger path number needs to be replaced, and the cost is high. The construction is complicated, for example, different wires are configured according to ports and distances of a large screen and a signal source, the later maintenance is complicated, and the transmission distance is limited by the wires. Fig. 2 is a system diagram of distributed stitching in the prior art. As shown in fig. 2, distributed splicing has synchronization problems, for example, the existing distributed decoding may show different pictures or even tearing feeling (as shown in fig. 3). The construction is tedious, for example, a sending card is butted with a decoder, the position and the fixing mode of the fixed interface machine are required to be found behind a large screen, and after the installation is finished, the later maintenance becomes complicated. FIG. 3 is an exemplary diagram of the display tearing perception of distributed tiling in the prior art. As shown in fig. 3, the picture is a 2 × 3 spliced screen, the black line is a signal source, and the phenomenon of one line out of synchronization occurs in the playing process of the signal source.

The embodiment of the application provides a large-screen splicing synchronization method and system. In order to facilitate understanding of the embodiments of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Fig. 4 is an exemplary schematic diagram of a large screen stitching synchronization system provided in accordance with some embodiments of the present application. As shown in fig. 4, the large screen splicing synchronization system 100 may include a network 110, a control area 120, a display area 130, a server 140, and the like. Specifically, the control area 120 and the display area 130 may establish communication through the network 110, for example, the control area 120 and the display area 130 may communicate in the same local area network (e.g., a network environment of the same router, etc.). Further, the control area 120 may be connected to the network 110 by wire (e.g., network cable, etc.) or wirelessly, etc., and the display area 130 may be connected to the network 110 by wire or wirelessly (e.g., WIFI, etc.), etc. In some embodiments, the control area 120 and the display area 130 may establish a connection through a Switch (Switch), e.g., a gigabit Switch or the like.

In some embodiments, the network 110 may include a cloud through which services provided by cloud computing may be enjoyed regardless of time and place. Cloud (Cloud) may include private, public, hybrid, and industrial clouds, among others. Cloud Computing (Cloud Computing) is a kind of distributed Computing, and means that a huge data Computing processing program is decomposed into countless small programs through a network "Cloud", and then the small programs are processed and analyzed by a system composed of a plurality of servers 140 to obtain results and are returned to a user. The cloud service is the result of hybrid evolution and leap of computer technologies such as distributed computing, utility computing, load balancing, parallel computing, network storage, hot backup redundancy and virtualization. The cloud splicing construction is not only a larger-area display area, but also an interconnected display platform is established; the free and flexible network enables the cloud splicing screen to have wider application scenes, and more updated application modes are created for users. Through strong technical bottom support, the cloud splicing can meet the requirements of unlimited signal input and output and splicing control, and meanwhile, various technologies such as video conferences, monitoring storage, network interaction and the like can be accessed more conveniently, so that the splicing system has more perfect functions.

According to some embodiments of the present application, the control area 120, the display area 130 may be the same or different terminal devices, and the like. The terminal device may include, but is not limited to, a cloud screen, a display terminal, a smart terminal, a mobile terminal, a computer, a rendering machine, and the like. In a cloud-based scenario, the control area 120 may include an encoder, a signal source, and the like. The display area 130 may include a decoder, a cloud screen, and the like. The decoder may be integrated in a mid-cloud screen. The cloud screen can be used as a terminal for receiving and splicing display of mass data, and the spliced screen is no longer a simple display terminal in cloud splicing. The cloud screen may include, but is not limited to, one or a combination of several of a Digital Light Processing (DLP) Device (Digital micromirror Device) based on a key imaging Device DMD), a PDP (Plasma Display Panel), a DID liquid Crystal tiled Display (Digital Information Display), an LCD (liquid Crystal Display), an LED, an OLED, an LCD tiled Display, an LED full-color Display, a projection fusion Display, and the like.

In some embodiments, server 140 is one type of computer that has the advantages of running faster, being more heavily loaded, etc. than a normal computer, and the corresponding price is higher. In a network environment, a server may provide computing or application services to other clients (e.g., terminals such as PCs, smart phones, ATMs, and large devices such as transportation systems). The server has high-speed CPU computing capability, long-time reliable operation, strong I/O external data throughput capability and better expansibility. The services that the server may provide include, but are not limited to, the ability to undertake responding to service requests, undertake services, secure services, and the like. The server, as an electronic device, has an extremely complex internal structure, including an internal structure similar to that of a general computer, and the like, and the internal structure of the server may include a Central Processing Unit (CPU), a hard disk, a memory, a system bus, and the like, as an example.

In some embodiments of the present application, the large screen stitching synchronization system 100 may omit one or more elements, or may further include one or more other elements. By way of example, the large screen mosaic synchronization system 100 may include multiple display regions 130, such as multiple identical or different cloud screens, and the like. As another example, the large screen stitching synchronization system 100 may include a plurality of control zones 120. As another example, the large screen stitching synchronization system 100 may include a plurality of servers 140, and the like. The Network 110 may be any type of communication Network, which may include a computer Network (e.g., a Local Area Network (LAN) or Wide Area Network (WAN)), the internet and/or a telephone Network, etc., or a combination of several. In some embodiments, the network 110 may be other types of wireless communication networks. The wireless communication may include microwave communication and/or satellite communication, among others. The Wireless communication may include cellular communication, such as Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA), third Generation Mobile communication (3G, The 3rd Generation communication), fourth Generation Mobile communication (4G), fifth Generation Mobile communication (5G), sixth Generation Mobile communication (6G), Long Term Evolution (LTE-a), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), Universal Mobile Telecommunications System (UMTS), Wireless Broadband (Broadband, Wireless Broadband), and The like, or a combination of several.

According to some embodiments of the present application, the wireless Communication may include wireless local Area Network (WiFi), Bluetooth Low Energy (BLE), ZigBee (ZigBee), Near Field Communication (NFC), magnetic security transmission, radio frequency and Body Area Network (BAN), or the like, or a combination of several. According to some embodiments of the present application, the wired communication may include a Global Navigation Satellite System (Global Navigation Satellite System), a Global Positioning System (GPS), a beidou Navigation Satellite System, galileo (european Global Satellite Navigation System), or the like. The wired communication may include six types of network (CAT6, for data transmission from switch, router to computer), Universal Serial Bus (USB), High-Definition multimedia interface (HDMI), recommended Standard 232(RS-232, recommended Standard 232), Plain Old Telephone Service (POTS), and/or the like, or a combination of several.

It should be noted that the above description of the large screen splicing synchronization system 100 is merely for convenience of description, and is not intended to limit the scope of the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the principles of the system, which may be combined in any manner or combined with other elements to form a subsystem for use in a field of application in which the method and system described above is practiced. For example, the display area 130 may integrate the decoder in a cloud screen or the like. Such variations are within the scope of the present application.

Fig. 5 is a schematic diagram of a specific large screen stitching synchronization system provided according to some embodiments of the present application. As shown in fig. 5, the screen splicing system 100 may include a switch 210, a control area 220, and a display area 230. Switch 210 may comprise a gigabit switch. The control region 220 may include an encoder, a signal source, and the like. The display area 230 may include a cloud screen, a decoder, and the like. The cloud screen can be used as a terminal for receiving and splicing display of mass data. The decoder may be integrated in a cloud screen. By way of example, the display area 230 may include a plurality of cloud screens, for example, the plurality of LCD large screens include LCD large screens 1-1, LCD large screens 1-2, LCD large screens 1-3, LCD large screens 1-4, LCD large screens 1-5, LCD large screens 1-6, etc., and the LCD large screen numbers 1-N (N is an integer greater than or equal to 1) may indicate that the LCD large screens are in the same system. The display area 230 may include a plurality of decoders, for example, the plurality of decoders may include decoder 1, decoder 2, decoder 3, decoder 4, decoder 5, decoder 6, and the like. The decoders may correspond to the LCD large screens one by one, for example, the decoder 1 may be installed inside the LCD large screen 1-1, and the decoder 2 may be installed inside the LCD large screen 1-2, and the … … decoder 6 may be installed inside the LCD large screen 1-6. The same system may comprise only one master node, for example, the decoder 1 corresponding to the LCD large screen 1-1 may be set as the master node. By comparing the system diagrams of fig. 1, fig. 2, and fig. 5, it can be seen that the improved system (as shown in fig. 5) is simpler in display area compared with the two systems in the prior art, so that the construction (integrated wiring), debugging, and later-stage system maintenance are all more convenient.

Fig. 6 is an exemplary flow diagram of a large screen splice synchronization method provided in accordance with some embodiments of the present application. As shown in fig. 6, the process 300 may be implemented by the large screen stitching synchronization system 100. In some embodiments, the large screen stitching synchronization method 300 may be initiated automatically or by command. The instructions may include system instructions, device instructions, user instructions, action instructions, and the like, or a combination of the several.

At 301, at least two decoder board card structures are modified and correspondingly installed inside at least two screens. Operation 301 may implement the adjustment of the display area 130 of the large screen splicing synchronization system 100 by a combination of hardware and software. In some embodiments, the board card structure of the decoder is modified in a manner of combining software and hardware, and at least two decoders are correspondingly installed inside at least two screens respectively, wherein the at least two decoders correspond to the at least two screens one to one. As an example, the display area 130 may include a plurality of decoders, a plurality of screens, and the like. The plurality of decoders may be installed inside the plurality of screens in a one-to-one correspondence. The screen can comprise a cloud screen and the like, and the cloud screen can be used as a terminal for receiving and splicing display of mass data. The cloud screen can include but is not limited to one or a combination of several of DLP rear projection equipment, a PDP (plasma display panel), a DID (do not display) liquid crystal spliced screen, an LCD (liquid crystal display), an LED (light-emitting diode), an OLED (organic light-emitting diode), an LCD spliced display screen, an LED full-color display screen, projection fusion display and the like. The chip adopted by the decoder board card can be consistent with a chip used by a mobile phone, and includes but is not limited to adopting a Haesi chip architecture, such as a kylin chip architecture and the like.

At 302, a decoder is set as a master node, and crystal oscillation time of all decoders is acquired through the master node. Operation 302 may be implemented by the server 140, the display area 130 of the large screen tiled synchronization system 100. In some embodiments, the display area 130 may set one of at least two decoders of the display area 130 as a master node. By way of example, the same system may include LCD large screens 1-1, 1-2, 1-3, 1-4, 1-5, 1-6, etc., and decoders 1, 2, 3, 4, 5, 6, etc., corresponding to the LCD large screens one to one. The same system may include only one master node, for example, the decoder 1 corresponding to the LCD large screen 1-1 may be set as the master node by UM configuration software. Further, the crystal oscillation time of the decoder 2, 3, 4, 5, 6, etc. is acquired by the master node decoder 1. In some embodiments, the display area 130 or the server 140 may distribute the decoders as master nodes in the same system, with the master nodes performing clock synchronization of all decoders in the same system. For example, the display area 130 or the server 140 may issue the decoder 1 as a master node in the same large screen splicing synchronization system 100, and clock synchronization of all the decoders 2, 3, 4, 5, 6, and the like in the large screen splicing synchronization system 100 is performed by the master node.

At 303, the time tags of all the oscillators are set, so that the time tag of each oscillator corresponds to one frame of picture. Operation 303 may be implemented by the display area 130 of the large screen stitching synchronization system 100. The crystal oscillator is a component of the decoder, one decoder corresponds to one crystal oscillator, and the crystal oscillator can comprise a high-precision crystal oscillator. In some embodiments, the display area 130 may set the time stamps of the oscillators to be 0 to 59, and the time stamps 0 to 59 correspond to the 1 st frame picture to the 60 th frame picture of the decoder, respectively. As an example, according to a refresh rate of 60 frames per second of a video, time tags of a crystal oscillator are respectively marked from a picture of a 1 st frame to a picture of a 60 th frame, for example, the crystal oscillator time 0 is applied to the picture of the 1 st frame of a decoder, and so on, the crystal oscillator time 59 is applied to the picture of the 60 th frame of the decoder, so that the time tag of the crystal oscillator corresponds to each frame of the video picture.

At 304, each decoder buffers at least one frame of picture by the master node checking the time stamps of all oscillators. Operation 304 may be implemented by the display area 130 of the large screen stitching synchronization system 100. In some embodiments, each decoder of the display area 130, such as each decoder of at least two screens, may buffer at least one frame of video picture after decoding is completed. As an example, to ensure uniformity of video synchronization, each decoder in the display area 130 may buffer 7-9 frames of video pictures after decoding, and further, when the crystal time of each decoder is not consistent, play the buffered pictures. For example, the display area 130 may correct the time stamp of the crystal oscillator of the other decoder by the master node decoder 1, so that the time stamp of the crystal oscillator corresponds to each frame of the video picture. In some embodiments, the process 300 may not perform buffering of the video pictures, for example, when the network is stable or the network speed meets a certain threshold or the crystal time of each decoder is consistent, each decoder may directly play the decoded video pictures after completing decoding, and omit the operation of buffering the pictures.

At 305, the master node is used as an initial time coordinate to send the crystal oscillator time of the master node to other decoder crystal oscillators. Operation 305 may be implemented by the display area 130 of the large screen stitching synchronization system 100. In some embodiments, the master node is used as an initial time coordinate, and the crystal oscillator time of the master node is sent to each of the other decoder crystal oscillators through network data. As an example, the crystal oscillation time of the master node decoder 1 is transmitted to the crystal oscillators of the decoders 2, 3, 4, 5, 6, etc. through network data with the master node decoder 1 as an initial time coordinate.

At 306, the frames corresponding to the time labels of the crystal oscillators are synchronously played according to the initial time coordinates. Operation 306 may be implemented by the display area 130 of the large screen stitching synchronization system 100. In some embodiments, according to the initial time coordinate, the display area 130 may play the frames corresponding to the time tags of the respective oscillators synchronously. As an example, the display area 130 may complete the clock synchronization of the decoder corresponding to the time tags of all the oscillators according to the initial time coordinates of the master node. Further, the display area 130 may move the pictures corresponding to the same time labels of the crystal oscillators, and synchronously play the pictures, so as to achieve perfect synchronization of large-screen splicing pictures. For another example, when the crystal time of each decoder is not consistent, the display area 130 may adjust the playing of the buffered 7 to 9 frames of video pictures by the time tag of the crystal. In some embodiments, operation 305 of flow 300 may play the decoded video pictures directly according to the crystal's time tag, or operation 306 may play the decoded video pictures directly in synchronization when the pictures are not buffered in operation 304.

According to some embodiments of the present application, the process 300 may further include decoding and outputting the LVDS signal to a screen, lighting the screen, and the like. The decoding may be performed by h.264 or h.265 protocols. H.264 is the highly compressed digital video codec standard proposed by the Joint video team (JVT, Joint video team) consisting of the ITU-T Video Coding Experts Group (VCEG) and the ISO/IEC Moving Picture Experts Group (MPEG) union. H.265 is a new video coding standard established by ITU-T VCEG following H.264. For the same image quality, h.265 occupies 50% less storage space than h.264. The h.265 standard can significantly reduce bandwidth consumption at equivalent content quality. In some embodiments, the process 300 may further perform debugging of screen color difference and the like through a control signal of LVDS. As an example, the process 300 may perform synchronous correction and color temperature adjustment of the cloud screen through software.

According to some embodiments of the application, the large screen splicing synchronization system 100 of the application can realize 1 RJ45100M/1000M self-adaptive cloud screen network interface, and supports HDCP and static IP address allocation; the device has a large-screen splicing processing function, and the single-screen windowing capacity is 16; the integrated design is adopted, third-party equipment is not needed, and the functions of video windowing, overlapping, roaming, random size, plan scene and the like are supported; the IPC network access is supported, and 1080P/720P/D1/CIF/QCIF video stream formats are supported; support ONVIF/RTSP/GB28181 and other proprietary protocols; interactive management is supported, and remote LED backlight is turned on and off; the effect of a large-screen horse race lamp is supported; the latest color correction technology and unique wide-angle processing engine. By the large-screen splicing synchronization method and system, convenience in construction, debugging and use can be realized, and maintenance cost can be reduced.

It should be noted that the above description of the process 300 is merely for convenience of description and is not intended to limit the scope of the present application. It will be appreciated by those skilled in the art that based upon the principles of the present system, the functions of the above-described processes and operations may be implemented in any combination or sub-processes and combinations of other operations without departing from such principles. Various modifications and changes in detail. For example, the process 300 may further include decoding and outputting the LVDS signal to a screen to light the screen, and so on. For another example, the process 300 may further include performing operations such as debugging of screen color differences through the control signals of LVDS. Such variations are within the scope of the present application.

In summary, according to the large-screen splicing synchronization method and system provided by the embodiment of the application, the decoder board card structures are modified, the decoder board cards are installed in various large screens in a butt joint mode, large-screen splicing is achieved through a network access network, a synchronization function is completed, a video splicing synchronization function and equipment among the large screens are considered, and user experience is improved.

It is to be noted that the above-described embodiments are merely examples, and the present application is not limited to such examples, but various changes may be made.

It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that the series of processes described above includes not only processes performed in time series in the order described herein, but also processes performed in parallel or individually, rather than in time series.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware associated with computer program instructions, and the program can be stored in a computer readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.

While the invention has been described with reference to a number of illustrative embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims

1. A large screen splicing synchronization method is characterized in that at least two decoder board card structures are modified and correspondingly installed in at least two screens, and further comprises the following steps:

setting a decoder as a main node, and acquiring crystal oscillation time of all the decoders through the main node;

setting time labels of all crystal oscillators, and enabling the time label of each crystal oscillator to correspond to one frame of picture;

the time labels of all crystal oscillators are corrected through the main node, and each decoder caches at least one frame of picture;

the main node is used as an initial time coordinate, and the crystal oscillator time of the main node is sent to the crystal oscillators of other decoders;

and synchronously playing the pictures corresponding to the time labels of the crystal oscillators according to the initial time coordinates.

2. The method of claim 1, wherein the at least two decoders correspond one-to-one to the at least two screens, further comprising:

outputting LVDS signals to a screen after decoding so as to light the screen;

and debugging the screen color difference through a control signal of the LVDS.

3. The method of claim 2, wherein the decoding is performed by h.264 or h.265 protocol.

4. The method of claim 1, wherein the crystal oscillator is a component of a decoder, and one decoder corresponds to one crystal oscillator, and the crystal oscillator comprises a high-precision crystal oscillator.

5. The method of claim 4, wherein the master node is configured by UM configuration software, wherein the master node is included in the same system, further comprising:

the decoders as the master node are distributed in the same system, and the master node synchronizes the clocks of all the decoders.

6. The method of claim 5, wherein the setting the time tags of all oscillators further comprises:

setting the time labels of the crystal oscillators to be 0 to 59, and respectively corresponding the time labels 0 to 59 to the 1 st frame picture to the 60 th frame picture of the decoder.

7. The method of claim 6, wherein the checking the time tags of all oscillators by the master node, and wherein buffering at least one frame of picture for each decoder further comprises:

each decoder buffers 7 to 9 frames of pictures;

and when the crystal oscillator time of each decoder is inconsistent, adjusting the picture of the playing buffer.

8. The method of claim 7, wherein the crystal oscillator time of the master node is sent to each of the other decoder crystal oscillators via network data, and the synchronously playing the picture corresponding to the time tag of each crystal oscillator further comprises:

according to the initial time coordinate of the main node, completing the clock synchronization of the decoder corresponding to the time tags of all crystal oscillators;

and transferring the pictures corresponding to the time labels of the crystal oscillators, and synchronously playing the pictures.

9. The method according to any one of claims 1 to 8, wherein the screen is a cloud screen, including DLP rear projection equipment, PDP plasma display panel, DID liquid crystal tiled screen, LCD, LED, OLED, LCD tiled display screen, LED full color display screen, projection fusion display.

10. The utility model provides a large screen concatenation synchronization system which characterized in that, revises two at least decoder integrated circuit board structures, corresponds to install inside two at least screens, further includes:

a memory configured to store data and instructions;

a processor in communication with the memory, wherein the processor, when executing instructions in the memory, is configured to: