CN104811752A - Multi-screen synchronization method and playing system for the same local area network - Google Patents
Multi-screen synchronization method and playing system for the same local area network Download PDFInfo
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- CN104811752A CN104811752A CN201510203600.2A CN201510203600A CN104811752A CN 104811752 A CN104811752 A CN 104811752A CN 201510203600 A CN201510203600 A CN 201510203600A CN 104811752 A CN104811752 A CN 104811752A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention relates to the technical field of telecommunications and discloses a multi-screen synchronization method and a playing system for the same local area network. The method includes the steps that a central server serving as a server side transmits at least one playing task to a plurality of intelligent terminals serving as client sides, wherein every intelligent terminal and the central server are in the same local area network, and the playing task comprises content to be played and content identification; the central server sends a playing instruction to every intelligent terminal in real time when the playing needs to be performed, wherein the playing instruction comprises the content identification of the content to be played; every intelligent terminal finds the content to be played according to the content identification and displays the content on a display screen of the intelligent terminal when intelligent terminal receives the play instruction. Compared with the prior art, the multi-screen synchronization method and the playing system for the same local area network achieve playing content synchronization of every intelligent terminal in the same local area network, and the number of the intelligent terminals can be unrestricted.
Description
Technical field
The present invention relates to telecommunication technology field, a kind of multi-screen synchronous method particularly in same local area network (LAN) and Play System.
Background technology
Subway, the other advertisement screen being provided with One's name is legion of road, advertisement screen internal memory and playing module, can play static state or dynamic menu or carry out loop play according to pre-configured.Each advertisement screen is existence independent of one another, is difficult to realize the synchronous of broadcasting.
At present, a kind of scheme is, by LAN, each advertisement screen is connected to same local area network (LAN).When needing synchronous displaying video, LAN server need in real time in local area network (LAN) each advertisement screen pushing video stream play, namely by the mode of real time propelling movement video flowing, realize the synchronous of each screen.But the present inventor finds that this kind of scheme exists following problem:
Video flowing real time propelling movement is higher to network bandwidth requirement, when the intelligent terminal quantity in network is more, due to the restriction of the network bandwidth, cannot guarantee in real time video flowing to be transferred to each intelligent terminal smoothly, that is, may be there is different delays in the video flowing that different intelligent terminal receives, be difficult to realize multi-screen synchronous.
Summary of the invention
The object of the present invention is to provide a kind of multi-screen synchronous method in same local area network (LAN) and Play System, make the play content that each intelligent terminal in same local area network (LAN) can be synchronous, and the number of intelligent terminal can be unrestricted.
For solving the problems of the technologies described above, the invention provides a kind of multi-screen synchronous method in same local area network (LAN), comprise following steps: at least one playing task transferred to several intelligent terminals as client as the central server of server end, wherein, each described intelligent terminal and described central server are in same local area network (LAN), and described playing task comprises content to be played and content identification; When playing, described central server sends play instruction in real time to each described intelligent terminal, carries content identification to be played in described play instruction; Each described intelligent terminal, when receiving described play instruction, finds content to be played according to described content identification, and is play by self-purchased display screen.
Present invention also offers a kind of Play System, comprise: central server and several intelligent terminals; Described central server is the server end of described Play System, and described intelligent terminal is the client of described Play System; Each described intelligent terminal and described central server are in same local area network (LAN); Described central server comprises: task transmission module and transmit control module; Described task transmission module is used at least one playing task to transfer to intelligent terminal described in several, and wherein, described playing task comprises content to be played and content identification; Described transmit control module is used for when playing, and sends play instruction in real time, carry content identification to be played in described play instruction to each described intelligent terminal; Described intelligent terminal comprises: enquiry module and playing module; Described enquiry module is used for when receiving described play instruction, searches content to be played according to described content identification; The content to be played that described playing module is used for described enquiry module to find is play by the display screen that intelligent terminal is self-purchased.
In terms of existing technologies, by being preserved by content delivery to be played to each intelligent terminal in advance, when needs are play, the transmission play instruction real-time by central server, realizes the synchronous broadcasting of multi-screen to embodiment of the present invention.Because content to be played can be pre-loaded in the buffer memory of each intelligent terminal, therefore when needs perform playback action, the play instruction that central server only needs real-time transmission data volume minimum, therefore less demanding to the bandwidth ability of Internet Transmission, thus make the number of intelligent terminal can be unrestricted.And because the data volume of play instruction is minimum, intelligent terminal and central server are all in again in same local area network (LAN), therefore to receive the delay of this instruction negligible for each intelligent terminal, thus ensure that the synchronism that each intelligent terminal is play content.
In addition, described central server sends in the step of play instruction in real time to each described intelligent terminal, comprises following sub-step: described central server will send in the play instruction buffer memory of each described intelligent terminal to same task queue; Described central server sends each play instruction in described task queue.By will the play instruction of each intelligent terminal be sent to be interrupted stored in also sending the process that central server can be avoided to send play instruction to each intelligent terminal in same task queue simultaneously, the each intelligent terminal of further guarantee synchronously receives play instruction, thus realizes multi-screen synchronous broadcasting.
In addition, described intelligent terminal comprises the first port for receiving document flow and the second port for receiving play instruction; At described central server, at least one playing task is transferred to several as in the step of the intelligent terminal of client, described playing task is transferred to described first port of each intelligent terminal by described central server; Send in real time in the step of play instruction to each described intelligent terminal at described central server, described play instruction is sent to described second port of each intelligent terminal by described central server.Because each intelligent terminal is the client of central server, so configure the particular data that specific port sends in order to receiving center server on each intelligent terminal, each intelligent terminal directly can judge according to its particular port data attribute (in this way play content or play instruction) that this port receives, thus without the need to carrying the attribute information of these data in data flow, therefore, the size of packet can be reduced, save flow.
In addition, described play instruction only carries described content identification.Because play instruction is real-time transmission, and each intelligent terminal and central server are positioned at same local area network (LAN), each intelligent terminal can real-time reception play instruction, so play instruction does not need the information of carrying such as reproduction time, play instruction is very little, thus ensure that the rapidity of transmission, and better synchronism.
In addition, the data that described intelligent terminal will receive from described first port, are saved in default default path.The data received from particular port are kept in default path by each intelligent terminal, preserve quick and easy-to-look-up to content to be played.
In addition, the length of described content identification is less than or equal to 2 bits.Because content identification data is less, transmit faster, respond faster, therefore, the length of content identification is set to be less than or equal to 2 bits, further ensures the response speed of each intelligent terminal.
Accompanying drawing explanation
Fig. 1 is the flow chart according to the multi-screen synchronous method in the same local area network (LAN) of first embodiment of the invention;
Fig. 2 is the structural representation of the Play System according to third embodiment of the invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the embodiments of the present invention are explained in detail.But, persons of ordinary skill in the art may appreciate that in each execution mode of the present invention, proposing many ins and outs to make reader understand the application better.But, even without these ins and outs with based on the many variations of following execution mode and amendment, each claim of the application technical scheme required for protection also can be realized.
First execution mode of the present invention relates to a kind of multi-screen synchronous method in same local area network (LAN), and idiographic flow as shown in Figure 1, comprises following steps:
Step 101, to transfer to several intelligent terminals as client as the central server of server end using at least one playing task.Wherein, described playing task comprises content to be played and content identification.
Specifically, each intelligent terminal all comprises the first port for receiving document flow, and playing task is transferred to the first port of each intelligent terminal by central server, and the file received from central server is saved in default default path by each intelligent terminal.That is, because each intelligent terminal is the client of central server, so at each intelligent terminal and central server enterprising style of writing part receiving port and destination interface configuration can be sent, make each intelligent terminal by the specific file (content to be played) of particular port (such as the first port) the receiving center server transmission on it, file transfer without any confusion, can not make mistakes, the transmission of the packet of such as destination address detection etc. can also be reduced simultaneously, save flow; Further, each intelligent terminal can also be kept in the local default path of each intelligent terminal from the specific file that particular port receives, facilitate each intelligent terminal to find content to be played.
Step 102, judges whether to play.Specifically, user directly can send play instruction by control centre's server.Such as user can send control command control centre server by human-computer interaction interface manual palpation or click the mouse and send play instruction, also can send play instruction by button control centre server.Or user can also preset the task list sending play instruction in central server, automatically performed the order sending play instruction by central server.The present invention does not limit this.When central server receives the Play Control instruction of user, enter step 103, otherwise, repeated execution of steps 102.
Step 103, judges whether in the process of transmission playing task.If it is determined that not in the process of transmission playing task, namely playing task is transmitted, then directly enter step 105, if it is determined that still in the process of transmission playing task, namely currently transmit playing task, then enter step 104.
Illustrate below and how to judge whether central server is in in the process of each intelligent terminal transmission playing task.
When central server is in the process to each intelligent terminal transmission playing task, playing task transmission state mark can be generated, when playing task transmission in time, this mark value is 1, represent " in playing task transmission ", when playing task is transmitted, this mark value is 0, represents " playing task is transmitted ".It should be noted that, when there being multiple playing task to transmit simultaneously, the content of this playing task transmission state mark is the state whether whole playing task is transmitted.It will be understood by those skilled in the art that and can also judge whether central server is transmitting in the process of playing task to each intelligent terminal, and the present invention does not do any restriction to this by alternate manner.If playing task transmission state mark value is 0, then enter step 105; If playing task transmission state mark value is 1, then enter step 104.
At step 104, in the transmission of prompting playing task, until playing task is transmitted.
Specifically, central server is can in human-computer interaction interface, and eject a prompting frame, teaching process personnel are current transmits playing task, until after playing task is transmitted, enter step 105.
For above-mentioned case, after central server transmits playing task by prompting frame teaching process personnel are current, need to continue to detect playing task transmission state mark value, until when playing task transmission state mark value is represent " playing task is transmitted " 0, more automatically enter step 105.
In step 105, central server sends play instruction in real time to each intelligent terminal, and play instruction carries content identification to be played.Particularly, each intelligent terminal comprises the second port for receiving play instruction.Play instruction is sent to the second port of each intelligent terminal by central server in real time.Because each intelligent terminal is the client of central server, so configure the specific instruction (play instruction) that particular port (the second port) sends in order to receiving center server on each intelligent terminal, central server is configured to particular port specific instruction being transferred to each intelligent terminal simultaneously, each intelligent terminal can judge its second port accepts to signaling be play instruction, and without the need to carrying the attribute information of these data in the packet of transmission, save flow.
Preferably, play instruction only carries content identification.Play instruction is shorter, transmit faster, each intelligent terminal response is faster, because play instruction is real-time transmission, and play instruction content is minimum, the each intelligent terminal being positioned at same local area network (LAN) synchronously can receive play instruction, so play instruction does not need the information of carrying such as reproduction time and so on, play instruction transmission fast.
Step 106, each intelligent terminal, when receiving play instruction, finds content to be played according to content identification, and is play by self-purchased display screen.Each intelligent terminal comprises memory, playing module, and memory is used for storing the content to be played received, the display screen playing video file by carrying after playing module is used for finding content to be played according to content identification.
Below for each intelligent terminal for advertisement screen is specifically described:
Content to be played as shown in table 1 and content identification are transferred to the second port that each advertisement screen is specified by central server in advance, and the data received from the second port are kept in the local default path preset by each advertisement screen.When playing, operating personnel click " displaying video " button on the human-computer interaction interface on central server by mouse, send play instruction.Because in advance playing task is transferred to each advertisement screen, so when central server receives the displaying video order of user, send play instruction (content identification namely in table 1) at once to each advertisement screen, because content identification data amount is minimum, this play instruction can be immediately received with each advertisement screen that central server is in same local area network (LAN), and find video file as shown in table 1 from the default path that this locality is preset, and play by the display screen that each advertisement screen is self-purchased.
Table 1
Content to be played | Content identification |
File1.mp4 | 1 |
File2.mp4 | 2 |
… | … |
Filen.mp4 | n |
Be not difficult to find, in the present embodiment, because content to be played can be pre-loaded in the buffer memory of each intelligent terminal, therefore when needs perform playback action, the play instruction that central server only needs real-time transmission data volume minimum, therefore less demanding to the bandwidth ability of Internet Transmission, thus make the number of intelligent terminal can be unrestricted.And because the data volume of play instruction is minimum, intelligent terminal and central server are all in again in same local area network (LAN), therefore to receive the delay of this instruction negligible for each intelligent terminal, thus ensure that the synchronism that each intelligent terminal is play content.
And, due to the client that each intelligent terminal is central server, so configure the particular data that specific port sends in order to receiving center server on each intelligent terminal, each intelligent terminal directly can judge according to its particular port data attribute (in this way play content or play instruction) that this port receives, thus without the need to carrying the attribute information of these data in data flow, therefore, the size of packet can be reduced, save flow.
Second execution mode of the present invention relates to a kind of multi-screen synchronous method in same local area network (LAN).Second execution mode has done further improvement on the basis of the first execution mode, and its improvements are, to be sent to by play instruction in the step of each intelligent terminal also to comprise following steps at central server:
Central server will send in the play instruction buffer memory of each intelligent terminal to same task queue, and central server sends each play instruction in task queue.By will the play instruction of each intelligent terminal be sent to central server transmission play instruction can be avoided to be interrupted to the process of each intelligent terminal stored in also sending in same task queue simultaneously, each intelligent terminal of guarantee synchronously receives play instruction further.
It will be appreciated by those skilled in the art that, at bottom, central server needs the play instruction sent to be send in the mode of serial ports, if the number of intelligent terminal is more, central server, in the process of play instruction sending each intelligent terminal successively, is likely interrupted by the task of higher priority.Therefore, in the present embodiment, by will the play instruction of each intelligent terminal be sent to stored in same task queue, make no matter to need to send how many play instructions, be all a transmission task concerning the upper strata of central server, thus avoid the process that central server sends play instruction to each intelligent terminal and interrupted, ensure that each intelligent terminal synchronously receives play instruction further, thus realize multi-screen synchronous and play.
Preferably, the length of content identification that play instruction carries is less than or equal to 2 bits.Because play instruction is less, transmit faster.Therefore, the length of content identification is set to be less than or equal to 2 bits, further ensures the response speed of each intelligent terminal.
Embodiment of the present invention compared with prior art, by in advance by whole file transfer to be played to each intelligent terminal, when needed, central server only sends the minimum play instruction of data to each intelligent terminal, thus ensure that each intelligent terminal can receive play instruction simultaneously and carry out video playback, while realizing multi-screen synchronous broadcasting, the intelligent terminal quantity in same local area network (LAN) is not limited.
The step of various method divides above, just in order to be described clearly, can merge into a step or splitting some step, being decomposed into multiple step, when realizing as long as comprise identical logical relation, all in the protection range of this patent; To adding inessential amendment in algorithm or in flow process or introducing inessential design, but the core design not changing its algorithm and flow process is all in the protection range of this patent.
Third embodiment of the invention relates to a kind of Play System, as shown in Figure 2.This Play System comprises:
Central server and several intelligent terminals, central server is the server end of Play System, and each intelligent terminal is the client of Play System, and each described intelligent terminal and described central server are in same local area network (LAN).
Central server comprises task transmission module, task transmission module is used at least one playing task to transfer to each intelligent terminal, each intelligent terminal comprises the first port for receiving document flow, and playing task is transferred to the first port of each intelligent terminal by task transmission module
Central server also comprises transmit control module, and each intelligent terminal also comprises the second port for receiving instruction, and play instruction is sent to the second port of each intelligent terminal by transmit control module.When playing, transmit control module sends play instruction in real time to each intelligent terminal.
Each intelligent terminal comprises enquiry module and playing module.Enquiry module is used for when receiving play instruction, finds content to be played according to content identification, and the content to be played that playing module is used for enquiry module to find is play by the display screen that intelligent terminal is self-purchased.
Be not difficult to find, present embodiment is the system embodiment corresponding with the first execution mode, and present embodiment can be worked in coordination with the first execution mode and be implemented.The relevant technical details mentioned in first execution mode is still effective in the present embodiment, in order to reduce repetition, repeats no more here.Correspondingly, the relevant technical details mentioned in present embodiment also can be applicable in the first execution mode.
It is worth mentioning that, each module involved in present embodiment is logic module, and in actual applications, a logical block can be a physical location, also can be a part for a physical location, can also realize with the combination of multiple physical location.In addition, in order to outstanding innovative part of the present invention, the unit not too close with solving technical problem relation proposed by the invention is not introduced in present embodiment, but this does not show the unit that there is not other in present embodiment.
Four embodiment of the invention relates to a kind of Play System.4th execution mode has done further improvement on the basis of the 3rd execution mode, main improvements are: transmit control module comprises following submodule: cache sub-module, for sending in the play instruction buffer memory of each intelligent terminal to same task queue; Instruction sends submodule, for sending each play instruction in task queue.
Further, the length of play instruction is less than or equal to 2 bits.
Because the second execution mode and present embodiment are mutually corresponding, therefore present embodiment can be worked in coordination with the second execution mode and be implemented.The relevant technical details mentioned in second execution mode is still effective in the present embodiment, and the technique effect that can reach in this second embodiment can realize in the present embodiment too, in order to reduce repetition, repeats no more here.Correspondingly, the relevant technical details mentioned in present embodiment also can be applicable in the second execution mode.
Persons of ordinary skill in the art may appreciate that the respective embodiments described above realize specific embodiments of the invention, and in actual applications, various change can be done to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (10)
1. the multi-screen synchronous method in same local area network (LAN), is characterized in that, comprise following steps:
At least one playing task transferred to several intelligent terminals as client as the central server of server end, wherein, each described intelligent terminal and described central server are in same local area network (LAN), and described playing task comprises content to be played and content identification;
When playing, described central server sends play instruction in real time to each described intelligent terminal, carries content identification to be played in described play instruction;
Each described intelligent terminal, when receiving described play instruction, finds content to be played according to described content identification, and is play by self-purchased display screen.
2. the multi-screen synchronous method in same local area network (LAN) according to claim 1, is characterized in that, described central server sends in the step of play instruction in real time to each described intelligent terminal, comprises following sub-step:
Described central server will send in the play instruction buffer memory of each described intelligent terminal to same task queue;
Described central server sends each play instruction in described task queue.
3. the multi-screen synchronous method in same local area network (LAN) according to claim 1, is characterized in that,
Described intelligent terminal comprises the first port for receiving document flow and the second port for receiving play instruction;
At described central server, at least one playing task is transferred to several as in the step of the intelligent terminal of client, described playing task is transferred to described first port of each intelligent terminal by described central server;
Send in real time in the step of play instruction to each described intelligent terminal at described central server, described play instruction is sent to described second port of each intelligent terminal by described central server.
4. the multi-screen synchronous method in same local area network (LAN) according to claim 3, is characterized in that,
Described play instruction only carries described content identification.
5. the multi-screen synchronous method in same local area network (LAN) according to claim 3, is characterized in that, at least one playing task is transferred to several as in the step of the intelligent terminal of client by described central server, comprises following sub-step:
The data that described intelligent terminal will receive from described first port, are saved in default default path.
6. the multi-screen synchronous method in same local area network (LAN) according to claim 4, is characterized in that,
The length of described content identification is less than or equal to 2 bits.
7. the multi-screen synchronous method in same local area network (LAN) according to any one of claim 1 to 6, is characterized in that, also comprise following steps:
Transmit in the process of described playing task at described central server to each intelligent terminal, described central server is forbidden sending play instruction in real time to each described intelligent terminal.
8. a Play System, is characterized in that, comprises central server and several intelligent terminals; Described central server is the server end of described Play System, and described intelligent terminal is the client of described Play System; Each described intelligent terminal and described central server are in same local area network (LAN);
Described central server comprises: task transmission module and transmit control module;
Described task transmission module is used at least one playing task to transfer to intelligent terminal described in several, and wherein, described playing task comprises content to be played and content identification;
Described transmit control module is used for when playing, and sends play instruction in real time, carry content identification to be played in described play instruction to each described intelligent terminal;
Described intelligent terminal comprises: enquiry module and playing module;
Described enquiry module is used for when receiving described play instruction, searches content to be played according to described content identification;
The content to be played that described playing module is used for described enquiry module to find is play by the display screen that intelligent terminal is self-purchased.
9. Play System according to claim 8, is characterized in that, described transmit control module comprises following submodule:
Cache sub-module, for sending in the play instruction buffer memory of each described intelligent terminal to same task queue;
Instruction sends submodule, for sending each play instruction in described task queue.
10. Play System according to claim 8, is characterized in that, described intelligent terminal comprises the first port for receiving document flow and the second port for receiving play instruction;
Described playing task is transferred to described first port of each intelligent terminal by described task transmission module;
Described play instruction is sent to described second port of each intelligent terminal by described transmit control module.
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