CN103248712B - A kind of electronic multimedia screen radio hookup management method and system - Google Patents

A kind of electronic multimedia screen radio hookup management method and system Download PDF

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Publication number
CN103248712B
CN103248712B CN201310196181.5A CN201310196181A CN103248712B CN 103248712 B CN103248712 B CN 103248712B CN 201310196181 A CN201310196181 A CN 201310196181A CN 103248712 B CN103248712 B CN 103248712B
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task
screen terminal
electrical screen
platform
radio hookup
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CN103248712A (en
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廖建新
张乾
郭盛兴
韦安健
李玄得
李树华
张延晋
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Xinxun Digital Technology (Hangzhou) Co.,Ltd.
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Hangzhou Dongxin Beiyou Information Technology Co Ltd
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Abstract

A kind of electronic multimedia screen radio hookup management method and system, when administrative staff add task for electrical screen terminal, comprise: the task code of electrical screen terminal searched by multimedia radio hookup platform, and by binary location 1 corresponding with task type on task code, task is stored in task data sheet corresponding to task type simultaneously, when electrical screen terminal sends task polling message, comprise: the task code of electrical screen terminal searched by multimedia radio hookup platform, and judge whether the binary digit on task code is 1 one by one, if, then corresponding according to binary digit task type, extract the task of electrical screen terminal, then by binary digits all on task code be 1 correspondence task synthesis a piece of news send to electrical screen terminal, when message sends successfully, binary digit task code being 1 is set to 0.The invention belongs to network communication technology field, can realize all kinds of electronic curtain unified content, the centralized management unifying broadcasting, unified monitoring in telemanagement mode.

Description

A kind of electronic multimedia screen radio hookup management method and system
Technical field
The present invention relates to a kind of electronic multimedia screen radio hookup management method and system, belong to network communication technology field.
Background technology
Along with the arrival in 3G epoch, between operator, the function of business hall is also progressively being changed to marketing service by basic service.But, traditional marketing service means, as the modes such as papery pamphlet, LED display, panel TV can not meet the demand of operation new product diversity, real-time at present, and also inefficiency is changed to the media resource in electrical screen, lack unified management.Equally, for the electronic digit label of public place, because its geographical position disperses more, more need at substantial manpower and materials to administer and maintain, information updating also often also exists problem not in time.
How to the unified management of all kinds of electrical screen equipment? patent application CN201210050752.X (application title: a kind of electronic digital signage terminal and the mutual method of management platform, applicant: Chengdu Dongyin Information Technology Co., Ltd, the applying date: 2012 ?03 ?01) disclose a kind of electronic digital signage terminal and the mutual method of management platform, the method comprises the steps: log-on webpage server, checking, submit to, store, management play content, electronic digital signage terminal Access Management Access platform, the address of contents list is fed back to electronic digital signage terminal by management platform, resolve, downloading contents list, resolve the address of content file, downloaded content file, generate playlist, play, show.This technical scheme is only limitted to the issue of media content, does not relate to the real-time servicing to the electrical screen being in diverse geographic location and monitoring.
Therefore, as how telemanagement mode realizes the centralized management to all kinds of electronic curtain unified content, unified broadcasting, unified monitoring, thus the on-site maintenance removed from all kinds of electrical screen equipment, to realize unmanned management? be still a unsolved technical problem.
Summary of the invention
In view of this, the object of this invention is to provide a kind of electronic multimedia screen radio hookup management method and system, can realize all kinds of electronic curtain unified content, the centralized management unifying broadcasting, unified monitoring in telemanagement mode, thus the on-site maintenance removed from all kinds of electrical screen equipment, to realize unmanned management.
In order to achieve the above object, the invention provides a kind of electronic multimedia screen radio hookup management method, when administrative staff are electrical screen terminal interpolation task by multimedia radio hookup platform, include:
The task code of electrical screen terminal searched by multimedia radio hookup platform, and by binary location 1 corresponding with the task type of task on the task code of described electrical screen terminal, the task of described electrical screen terminal is stored in task data sheet corresponding to task type simultaneously, described task code is the bit string of a multidigit, each binary digit in task code represents a task type respectively, its value is 1 indicate task, and 0 represents not have task
When electrical screen terminal sends task polling message to obtain corresponding task to multimedia radio hookup platform, also include:
The task code of electrical screen terminal searched by multimedia radio hookup platform, and judge whether each binary digit on the task code of described electrical screen terminal is 1 one by one, if, then corresponding according to described binary digit task type, the task of described electrical screen terminal is extracted from the task data sheet that task type is corresponding, then be that the task of the electrical screen terminal of 1 correspondence is synthesized a task message and sent to described electrical screen terminal by binary digits all on described task code, when described task message sends successfully, finally all binary digits above-mentioned task code being 1 are set to 0,
When there being new electrical screen terminal to be connected to multimedia radio hookup platform, also include:
Whether the inquiry of multimedia radio hookup platform preserves the timestamp that described new electrical screen terminal is connected to multimedia radio hookup platform, if not, then notify that electrical screen terminal is to the registration of multimedia radio hookup platform, and after the success of electrical screen endpoint registration, store electrons screen terminal is connected to the timestamp of multimedia radio hookup platform, then the group task that the group attribute of described new electrical screen terminal is corresponding is searched, finally according to the task type of group task, by binary location 1 corresponding with the task type of described group task on the task code of described new electrical screen terminal.
In order to achieve the above object, present invention also offers a kind of electronic multimedia screen radio hookup management system, include multimedia radio hookup platform and several electrical screen terminals, wherein:
Multimedia radio hookup platform, for be each electrical screen terminal definitions task code, described task code is the bit string of a multidigit, and each binary digit in task code represents a task type respectively, and its value is 1 indicate task, and 0 expression there is not task, when administrative staff are electrical screen terminal interpolation task by multimedia radio hookup platform, search the task code of electrical screen terminal, and by binary location 1 corresponding with the task type of task on the task code of described electrical screen terminal, the task of described electrical screen terminal is stored in task data sheet corresponding to task type simultaneously, when electrical screen terminal sends task polling message to obtain corresponding task to multimedia radio hookup platform, search the task code of electrical screen terminal, and judge whether each binary digit on the task code of described electrical screen terminal is 1 one by one, if, then corresponding according to described binary digit task type, the task of described electrical screen terminal is extracted from the task data sheet that task type is corresponding, then be that the task of the electrical screen terminal of 1 correspondence is synthesized a task message and sent to described electrical screen terminal by binary digits all on described task code, when described task message sends successfully, finally all binary digits above-mentioned task code being 1 are set to 0,
Electrical screen terminal, for adopting the mechanism of automatic regular polling, timing carries out task poll to obtain task to multimedia radio hookup platform, and task described in scheduled for executing, on screen, show play content simultaneously,
Described multimedia radio hookup platform and electrical screen terminal are connected by network,
Described multimedia radio hookup platform includes further:
Autotask distributing device, for when there being electrical screen terminal to be connected to multimedia radio hookup platform, whether inquiry preserves the timestamp that described electrical screen terminal is connected to multimedia radio hookup platform, if not, then notify that electrical screen terminal is to the registration of multimedia radio hookup platform, and after the success of electrical screen endpoint registration, store electrons screen terminal is connected to the timestamp of multimedia radio hookup platform, then the group task that the group attribute of described electrical screen terminal is corresponding is searched, finally according to the task type of group task, by binary location 1 corresponding with the task type of described group task on the task code of described electrical screen terminal.
Compared with prior art, the invention has the beneficial effects as follows: the present invention is by network, by the informationization technology such as Digital Transmission and video playback, each class of electronic devices such as the TV screen of in business hall or public place, electronic poster screen are networked, and realize the centralized management to all kinds of electronic curtain unified content, unified broadcasting, unified monitoring in telemanagement mode, thus effectively reduce the maintenance and management cost of all kinds of electrical screen, achieve unmanned management, and improve consistency and the promptness of distribution of multimedia information, multimedia radio hookup platform can make to electrical screen terminal, issue polytype task, such as: playing task, control task, configuration task, instant message task, real time data task, software upgrading task, operating state reports task, report task broadcasting content, daily record reports task dispatching, in order to make, electrical screen terminal is instant in single poll obtains all tasks that should obtain, the present invention is identified by multiple tasks of task code to each electrical screen terminal, thus energy fast finding, and send all inter-related tasks to electrical screen terminal, task type can also expand according to actual needs flexibly, in order to prevent from occurring in playing process abnormal, electrical screen terminal can also be repaired playing task automatic inspection, like this when occurring to play abnormal conditions, and can Timeliness coverage recover broadcast state, can not play in order to ensure electrical screen terminal and be distorted or other improper modes download the content be implanted in electrical screen terminal by manual, electrical screen terminal can also check the legitimacy of material before playing task, the present invention can also in electrical screen terminal external camera, above the display screen being arranged on electrical screen terminal by camera, according to effective spectators' number and the viewing duration of different play content, the interest tendency of the spectators of assessment different location, and adjust play content, thus reach the precisely efficient input of multimedia content.
Accompanying drawing explanation
Fig. 1 be when electrical screen terminal receive multimedia radio hookup platform send task message time concrete operations flow chart.
Fig. 2 is in Fig. 1 step B6, and electrical screen terminal sends the concrete operations flow chart of continuous screenshotss information to multimedia radio hookup platform.
Fig. 3 is the concrete operations flow chart that electrical screen terminal is also repaired playing task automatic inspection.
Fig. 4 is by electrical screen terminal external camera, to the concrete operations flow chart that the actual effect of multimedia messages broadcasting is evaluated.
Fig. 5 is the composition structure chart of a kind of electronic multimedia screen of the present invention radio hookup management system.
Fig. 6 is the composition structure chart of electrical screen terminal.
Fig. 7 is the composition structure chart playing final controlling element.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with drawings and Examples, the present invention is described in further detail.
The present invention can by network and system platform, by the informationization technology such as Digital Transmission and video playback, each class of electronic devices such as TV screen, electronic poster screen, advertising digital label of business hall or public place is networked, realizes the centralized management to all kinds of electronic curtain unified content, unified broadcasting, unified monitoring in telemanagement mode.
The operation interface that administrative staff can broadcast platform by multimedia makes polytype task for electrical screen terminal, and described task type includes but not limited to: playing task, control task, configuration task, instant message task (as word message), real time data task (as weather forecast), software upgrading task, operating state report task, content reports task, daily record reports task dispatching broadcasting.Wherein, for control task, administrative staff can also broadcast the analog telecommand device interface of platform by multimedia, carry out remote manipulator operation to electrical screen terminal, and after each step button sends the instruction of electronic remote screen terminal control, view the screenshotss information that electrical screen terminal returns in time.
The agreement of HTTP and XML can be adopted to carry out alternately between multimedia radio hookup platform and electrical screen terminal, in order to ensure the fail safe communicated, a communication key can also be had between multimedia radio hookup platform and electrical screen terminal, each walks mutual request and response all adopts HTTP Digital Signature Algorithm encrypting and authenticating, thus guarantees the legal identity of both sides.When electrical screen starting up of terminal or after restarting, electrical screen terminal will use HTTPDigest mode to the registration of multimedia radio hookup platform, thus complete the two-way authentication between electrical screen terminal and multimedia radio hookup platform, include:
Steps A 1, electrical screen terminal send registration request to multimedia radio hookup platform, and multimedia radio hookup platform returns WWW-Authenticate message header, and request electrical screen terminal does eap-message digest;
Steps A 2, electrical screen terminal sends the HTTP request with Authorization to multimedia radio hookup platform, described Authorization comprise summary info and other etc. parameter, after multimedia radio hookup platform receives described HTTP request, according to the summary info of the Authorization of HTTP request to electrical screen terminal authentication, and the response message returned after authentication success with Authentication-Info message header, electrical screen terminal proceeds server authenticates according to the parameter in the Authentication-Info message header of described response message.
When after the success of electrical screen endpoint registration, multimedia radio hookup platform can adopt the mode store electrons of key-value pair to shield terminal and be connected to the timestamp that multimedia broadcasts platform, and register clock for each electrical screen terminal maintains one, thus the effective time of two-way authentication is identified, described register clock be with electrical screen terminal be connected to multimedia radio hookup platform timestamp as starting point one section effective time interval, in described registration clock, electrical screen terminal does not need to repeat to the registration of multimedia radio hookup platform again, if outside described registration clock, when electrical screen terminal sends any service request to multimedia radio hookup platform, multimedia radio hookup platform will require that electrical screen terminal re-registers.
Like this, when electrical screen terminal networking and be registered to multimedia radio hookup platform after, electrical screen terminal can adopt the mechanism of automatic regular polling, timing to multimedia radio hookup platform carry out task poll to obtain corresponding task, and in electrical screen terminal task described in scheduled for executing.Need to obtain because electrical screen terminal may have multiple task in each task poll, different tasks is stored in different task data sheets according to its task type.In order to make all multiple tasks that should obtain of acquisition that electrical screen terminal can be instant in single task poll, multimedia radio hookup platform is each electrical screen terminal definitions task code, described task code can be the bit string of a multidigit (as 32), each binary digit in task code represents a task type respectively, its value is 1 indicate task, 0 represents not have task, and the mode of key-value pair can also be adopted to store.
When administrative staff are electrical screen terminal interpolation task by multimedia radio hookup platform, include:
The task code of electrical screen terminal searched by multimedia radio hookup platform, and by binary location 1 corresponding with the task type of task on the task code of described electrical screen terminal, the task of described electrical screen terminal is stored in task data sheet corresponding to task type simultaneously
When electrical screen terminal sends task polling message to obtain corresponding task to multimedia radio hookup platform, also include:
The task code of electrical screen terminal searched by multimedia radio hookup platform, and judge whether each binary digit on the task code of described electrical screen terminal is 1 one by one, if, then corresponding according to described binary digit task type, the task of described electrical screen terminal is extracted from the task data sheet that task type is corresponding, then be that the task of the electrical screen terminal of 1 correspondence is synthesized a task message and sent to described electrical screen terminal by binary digits all on described task code, when described task message sends successfully, finally all binary digits above-mentioned task code being 1 are set to 0.
Further, the present invention can also classify according to the feature of task type, and be divided into by all task types and control generic task and classes of messages task, and control generic task is distributed in some for the height in task code positions, classes of messages task is distributed in low some positions.Such as, when task code is 32, high 16 wherein can be distributed to control generic task, distribute to classes of messages task for low 16.
Administrative staff can also by the group attribute of electrical screen terminal, for all electrical screen terminals of same group add group task, like this, when there being new electrical screen terminal to be connected to multimedia radio hookup platform, multimedia radio hookup platform can according to the group attribute of electrical screen terminal, for it makes and release tasks automatically, include:
Is the timestamp that described electrical screen terminal is connected to multimedia radio hookup platform preserved in the inquiry of multimedia radio hookup platform? if not, then represent that described electrical screen terminal is new electrical screen terminal, notice electrical screen terminal is to the registration of multimedia radio hookup platform, and after the success of electrical screen endpoint registration, the mode store electrons of key-value pair screen terminal is adopted to be connected to the timestamp of multimedia radio hookup platform, then the group task that the group attribute of described electrical screen terminal is corresponding is searched, finally according to the task type of group task, by binary location 1 corresponding with the task type of described group task on the task code of described electrical screen terminal.
The information stored in task data sheet includes the electrical screen terminal of task matching, task definition and task status, and described task status includes: to be obtained, obtain successfully.After task is sent to electrical screen terminal by multimedia radio hookup platform, electrical screen terminal will be broadcasted platform to multimedia and return task acquisition state information, include and obtain successfully or obtain unsuccessfully.Multimedia radio hookup platform obtains state information according to task, upgrades the task status (as to be obtained or obtain successfully) of corresponding task in task data sheet.When electrical screen terminal causes without available playlist description document due to local memory loss, electrical screen terminal initiatively will send the message of application initialization task to multimedia radio hookup platform, also include:
The all tasks of belonging to this electrical screen terminal in multimedia radio hookup platform query task tables of data, and the task status of wherein not out of date task is set to " to be obtained ", simultaneously by binary location 1 corresponding with the task type of described not out of date task in the task code of this electrical screen terminal.
The present invention can also broadcast the task of platform to electrical screen terminal by multimedia and issue, and realizes unmanned management, thus removes the on-site maintenance to electrical screen terminal from.As shown in Figure 1, when electrical screen terminal receive multimedia radio hookup platform send task message time, include further:
Step B1, electrical screen terminal extract a task one by one from the task message that multimedia radio hookup platform sends, and resolve the task type of described task;
Do you step B2, judge that the task type of described task is configuration task? if, then to execute the task middle parameter configuration of specifying, described parameter configuration includes but not limited to: in configuration multimedia radio hookup platform service IP address, multimedia radio hookup platform port, electrical screen terminal downloads speed limit, electrical screen terminal automatic switching time, electrical screen terminal permission download time section, electrical screen terminal polling requesting interval, the daily record of electrical screen terminal by reference, then turn to step B7; If not, then next step is continued;
Do you step B3, judge that the task type of described task is control task? if, control command in then executing the task, described control command includes but not limited to: dormancy, wake up, shut down, start shooting, disk empties, long-range shell-command, then turns to step B7; If not, then next step is continued:
Do you step B4, judge that the task type of described task is that operating state reports task? if, then collect and report the electrical screen terminal data required in task, described electrical screen terminal data includes but not limited to: electrical screen terminal configuration parameters, electrical screen terminal running state, the seizure condition of electrical screen terminal CPU, internal memory, disk etc., then turns to step B7; If not, then next step is continued;
Do you step B5, judge that the task type of described task is playing task? if, then download according to the material in playing task and describe inventory, download one by one and all material element files preserved in playing task in this locality, then perform Play Control according to the playlist description document in playing task, then turn to step B7; If not, then next step is continued;
Can be as required, be multiple viewing area by flexible for the screen in electrical screen terminal cutting, the corresponding one or more program in each viewing area, program can be the set of one or more multimedia element, and these multimedia elements are play according to order and time attribute in this region.Can according to the feature of multimedia element, define several element tags assemblies, such as picture, video, audio frequency, text, webpage, clock, weather forecast, real time data etc., and define the element tags assembly superposed in viewing area split screen pattern, the broadcast program of each viewing area and viewing area in the playlist description document sending to the playing task of electrical screen terminal to comprise at multimedia radio hookup platform, thus realize the imposition layout of high flexible.Meanwhile, assembly can also be expanded as required, to support the element form more enriched;
Do you step B6, judge that the task type of described task reports task broadcasting content? if, then to the screen shot play, and by the screen shot information such as material element files ID, playing progress rate including screenshot picture, the playing task ID of current broadcasting, each viewing area are being play, report multimedia radio hookup platform by the interaction protocol of HTTP+XML, then turn to step B7; If not, then next step is continued;
Step B7, judge whether to have extracted all tasks from task message? if so, then this flow process terminates; If not, then turn to step B1, continue to extract next task.
As shown in Figure 2, in described step B6, electrical screen terminal can be broadcasted platform to multimedia and send continuous screenshotss information, and multimedia is broadcasted platform thus can be refreshed and demonstrate the current screen information of electrical screen terminal by self-timing, includes further:
Step B61, multimedia radio hookup platform receives the screen shot information that electrical screen terminal is sent, described screen shot information is kept at the tail of the queue of the screen shot message queue of described electrical screen terminal, and the current queue size of the screen shot message queue of described electrical screen terminal is returned to electrical screen terminal, meanwhile, according to the queuing principle of first in first out, from the screen shot message queue of electrical screen terminal, extract screen shot information one by one and show;
Step B62, electrical screen terminal receive the current queue size of the screen shot message queue that multimedia radio hookup platform returns, and do you judge that described current queue size equals queue maximum N? if, then illustrate that multimedia radio hookup platform stops refreshing and checks the current screen of electrical screen terminal, electrical screen terminal stops sending screen shot information to multimedia radio hookup platform, and this flow process terminates; If not, then continue to send screen shot information to multimedia radio hookup platform, turn to step B61.
Electrical screen terminal carries out unified planning management to all kinds file downloaded from multimedia radio hookup platform, under activity data unification is saved in a catalogue, be called " working directory ", under working directory, then be organized into playing task list directory, Multi-media Material catalogue, Log Directory, playing task download inventory, miscellaneous data catalogue, software upgrading catalogue and temp directory etc. respectively.Electrical screen terminal, according to downloading the playlist description document be stored in electrical screen terminal, can regularly perform expired content cleaning operation:
1, the playlist description document of Delete Expired in time in playing process is dispatched;
2, regularly start the self-inspection of execution content to safeguard, the material element files be not present in effective playlist description document is cleaned out, namely according to the broadcasting end time of playing task, expired material element files is deleted.
As shown in Figure 3, abnormal in order to prevent from occurring in playing process, electrical screen terminal can also be repaired playing task automatic inspection, like this when occurring to play abnormal conditions, can Timeliness coverage recover broadcast state, and include:
Do step C1, regular check have the playing task play? if not, then step C2 is continued; If so, then step C3 is continued;
Step C2, starting scheduling logic selects a playing task to play, and for each viewing area in playing task, start a Play Control thread play for the programme content controlling separately this viewing area respectively, a logging timestamp array is set simultaneously, each logging timestamp element in described logging timestamp array preserves the Play Control information of different Play Control thread respectively, described Play Control information includes Play Control Thread Id, the viewing area ID controlled, the material content type that viewing area is being play is (as picture, video etc.), refresh interval, the information such as refresh time stamp, all Play Control threads are by according to the refresh interval of logging timestamp element corresponding to this Play Control thread in logging timestamp array, the refresh time of described logging timestamp element stamp is updated to current time by timing, turn to step C1,
Electrical screen terminal is when selecting playing task, can support to intercut, loop play, fixed time airplay, the multiple broadcast strategies such as pad broadcasting, can also dispatch playing task based on time and priority two attributes: each playing task has reproduction time section and priority attribute, electrical screen terminal is dispatched according to time and priority for the multiple playing task downloaded from multimedia radio hookup platform, select to play in the playing task that current play time section medium priority is the highest, if priority is identical, then select the playing task that download time is nearest,
Step C3, logging timestamp element one by one in inspection record timestamp array, and do you judge that difference that the refresh time of current time and described logging timestamp element stabs exceedes the refresh interval of described logging timestamp element? if, then illustrate that the Play Control thread that described logging timestamp element is corresponding is in abnormality, reclaim the Play Control thread that described logging timestamp element is corresponding, then a new Play Control thread is restarted for substituting the Play Control thread be recovered, and the refresh time of described logging timestamp element stamp is updated to current time, continue the next record timestamp element in inspection record timestamp array, when checking out all logging timestamp element rear steering step C1, if not, then illustrating that the Play Control thread that described logging timestamp element is corresponding is in normal condition, continuing the next record timestamp element in inspection record timestamp array, when checking out all logging timestamp element rear steering step C1.
Produce jam in order to avoid a large amount of electrical screen terminal access, multimedia radio hookup platform can also adopt one or more following flow control policy:
1, electrical screen terminal to be separated and download of avoiding the peak hour, thus the high load capacity flow avoided a large amount of electrical screen terminal access of same time and produce;
2, the downloading rate of each electrical screen terminal of multimedia radio hookup platform courses, and the downloading rate of the overall situation (namely multimedia broadcasts the maximum egress rate that platform provides for download service);
3, the electrical screen terminal downloads speed limit of each electrical screen terminal is set.
Can not play in order to ensure electrical screen terminal and be distorted or other improper modes download the content be implanted in electrical screen terminal by manual, also include:
Step D1, multimedia radio hookup platform adopts random sampling algorithms, several data are extracted respectively from each material element files of playing task, then cryptographic algorithm is adopted to calculate the signing messages of each material element files, finally the playing task including material download description inventory is sent to electrical screen terminal, described material downloads the signing messages describing and include each material element files ID, material element files title, material element files download URL, material element files size and material element files in inventory; Wherein, md5 cryptographic algorithm can be adopted to carry out digital signature to material element files;
Step D2, electrical screen terminal receive playing task, then download according to described material the material element files download URL described in inventory and download the relevant all material element files of this playing task and be kept at this locality,
When electrical screen terminal is according to the playlist description document of playing task, before preparing to play to each material element files in playlist description document, also include:
Step e 1, the material element files of electrical screen terminal reading and saving in this locality;
Is the material element files that the material of step e 2, the size judging described material element files and playing task is downloaded in description inventory in the same size? if so, then step e 3 is continued; If not, then show that described material element files is illegal, skip described material element files, continue to prepare to play to the next material element files in playlist description document, turn to step e 1;
Step e 3, electrical screen terminal adopt the random sampling algorithms consistent with multimedia radio hookup platform, several data are extracted from described material element files, then cryptographic algorithm is adopted to calculate the signing messages of described material element files, and do you judge that the signing messages of described material element files is consistent with the signing messages that material downloads the material element files described in inventory? if, then show that material element files is legal, play described material element files; If not, then show that material element files is illegal, skip described material element files, continue to prepare to play to the next material element files in playlist description document, turn to step e 1.
Described random sampling algorithms from material element files, can choose the data of m bit byte again after n-bit byte, and wherein, the value of sampling parameter n, m can be arranged according to actual needs flexibly, and can also regularly adjust, to guarantee safety.Because described random sampling algorithms is that partial data in stochastical sampling file carrys out compute signature, instead of calculate for all data in whole file, therefore also assures that the efficiency of algorithm, computing time is short and do not affect other program behaviors, thus effectively ensures that online, local off-line data is not illegally distorted.
As shown in Figure 4, the present invention can also by electrical screen terminal external camera, above the display screen being arranged on electrical screen terminal, evaluates, include the actual effect that multimedia messages is play by camera:
Step F 1, the recognition of face of electrical screen terminal operating and track algorithm, guarded region is entered until when leaving when there being a face, record the viewing duration of described spectators, effective spectators' number is added one simultaneously, wherein, described recognition of face and track algorithm can adopt the Face detection and tracking method based on Camshift and particle filter algorithm;
The data such as viewing duration of current play content and effectively spectators' number, each spectators are reported to multimedia to broadcast platform by step F 2, electrical screen terminal in real time;
The data of step F 3, multimedia radio hookup platform to all electrical screen terminal to report carry out tabulate statistics, according to effective spectators' number and the viewing duration of different play content, the interest tendency of the spectators of assessment different location (such as: for the different advertising films play in the same time period, add up the effective spectators' number in each advertising film playing process, then evaluate according to effective spectators' number the adline or advertised product that spectators prefer), and adjust play content according to the interest tendency of spectators, thus reach the precisely efficient input of multimedia content.
As shown in Figure 5, a kind of electronic multimedia screen radio hookup of the present invention management system includes multimedia radio hookup platform and several electrical screen terminals, wherein:
Multimedia radio hookup platform, for being each electrical screen terminal definitions task code, described task code can be the bit string of a multidigit (as 32), each binary digit in task code represents a task type respectively, its value is 1 indicate task, 0 represents not have task, and the mode of key-value pair can also be adopted to store, when administrative staff are electrical screen terminal interpolation task by multimedia radio hookup platform, search the task code of electrical screen terminal, and by binary location 1 corresponding with the task type of task on the task code of described electrical screen terminal, the task of described electrical screen terminal is stored in task data sheet corresponding to task type simultaneously, when electrical screen terminal sends task polling message to obtain corresponding task to multimedia radio hookup platform, search the task code of electrical screen terminal, and judge whether each binary digit on the task code of described electrical screen terminal is 1 one by one, if, then corresponding according to described binary digit task type, the task of described electrical screen terminal is extracted from the task data sheet that task type is corresponding, then be that the task of the electrical screen terminal of 1 correspondence is synthesized a task message and sent to described electrical screen terminal by binary digits all on described task code, when described task message sends successfully, finally all binary digits above-mentioned task code being 1 are set to 0, described task type includes but not limited to: playing task, control task, configuration task, instant message task (as word message), real time data task (as weather forecast), software upgrading task, operating state reports task, report task broadcasting content, daily record reports task dispatching,
Electrical screen terminal, for adopting the mechanism of automatic regular polling, timing carries out task poll to obtain task to multimedia radio hookup platform, and task described in scheduled for executing, on screen, show play content simultaneously,
Described multimedia radio hookup platform and electrical screen terminal are connected by network.
Described multimedia radio hookup platform includes further:
Autotask distributing device, for when there being electrical screen terminal to be connected to multimedia radio hookup platform, whether inquiry preserves the timestamp that described electrical screen terminal is connected to multimedia radio hookup platform, if not, then represent that described electrical screen terminal is new electrical screen terminal, notice electrical screen terminal is to the registration of multimedia radio hookup platform, and after the success of electrical screen endpoint registration, the mode store electrons of key-value pair screen terminal is adopted to be connected to the timestamp of multimedia radio hookup platform, then the group task that the group attribute of described electrical screen terminal is corresponding is searched, finally according to the task type of group task, by binary location 1 corresponding with the task type of described group task on the task code of described electrical screen terminal,
Task status management devices, for after task is sent to electrical screen terminal by multimedia radio hookup platform, state information is obtained according to the task that electrical screen terminal returns to multimedia radio hookup platform, include and obtain successfully or obtain unsuccessfully, in task data sheet, upgrade the task status (as to be obtained or obtain successfully) of corresponding task; When receiving electrical screen terminal and sending the message of application initialization task to multimedia radio hookup platform, the all tasks of belonging to this electrical screen terminal in query task tables of data, and the task status of wherein not out of date task is set to " to be obtained ", simultaneously by binary location 1 corresponding with the task type of described not out of date task in the task code of this electrical screen terminal.The information stored in task data sheet includes the electrical screen terminal of task matching, task definition and task status, and described task status includes: to be obtained, obtain successfully.
As shown in Figure 6, described electrical screen terminal includes further:
Task receiving system, for extracting each task one by one from the multimedia radio hookup platform task message of sending, and resolve the task type of task, then according to task type, described task is transmitted to configuration final controlling element, controls final controlling element, operating state reporting device, play final controlling element or process broadcasting content reporting device;
Configuration final controlling element, for middle parameter configuration of specifying of executing the task, described parameter configuration includes but not limited to: in configuration multimedia radio hookup platform service IP address, multimedia radio hookup platform port, electrical screen terminal downloads speed limit, electrical screen terminal automatic switching time, electrical screen terminal permission download time section, electrical screen terminal polling requesting interval, the daily record of electrical screen terminal by reference;
Control final controlling element, for the control command in executing the task, described control command includes but not limited to: dormancy, wake up, shut down, start shooting, disk empties, long-range shell-command:
Operating state reporting device, for collecting and reporting the electrical screen terminal data required in task, described electrical screen terminal data includes but not limited to: electrical screen terminal configuration parameters, electrical screen terminal running state, the seizure condition of electrical screen terminal CPU, internal memory, disk etc.;
Play final controlling element, for according in playing task material download describe inventory, downloads one by one and all material element files preserved in playing task in this locality, then according in playing task playlist description document execution Play Control;
Broadcasting content reporting device, for to the screen shot play, and by the screen shot information such as material element files ID, playing progress rate including screenshot picture, the playing task ID of current broadcasting, each viewing area are being play, report multimedia radio hookup platform by the interaction protocol of HTTP+XML.
Electrical screen terminal can be broadcasted platform to multimedia and send continuous screenshotss information, multimedia radio hookup platform thus can refresh and demonstrate the current screen information of electrical screen terminal by self-timing, describedly includes further broadcasting content reporting device:
Continuous screenshotss report unit, for sending screen shot information to multimedia radio hookup platform, obtain the current queue size of the screen shot message queue that multimedia radio hookup platform returns, and judge whether described current queue size equals queue maximum N, if so, then stop sending screen shot information to multimedia radio hookup platform, if not, then continue to send screen shot information to multimedia radio hookup platform
Described multimedia radio hookup platform also includes:
Continuous screenshotss management devices, for receiving the screen shot information that electrical screen terminal is sent, described screen shot information is kept at the tail of the queue of the screen shot message queue of described electrical screen terminal, and the current queue size of the screen shot message queue of described electrical screen terminal is returned to electrical screen terminal, meanwhile, according to the queuing principle of first in first out, from the screen shot message queue of electrical screen terminal, extract screen shot information one by one and show.
As shown in Figure 7, play final controlling element to include further:
Playing task scheduling unit, for dispatching playing task based on time and priority two attributes: each playing task has reproduction time section and priority attribute, electrical screen terminal is dispatched according to time and priority for the multiple playing task downloaded from multimedia radio hookup platform, select to play in the playing task that current play time section medium priority is the highest, if priority is identical, then select download time nearest playing task, also support to intercut simultaneously, loop play, fixed time airplay, the multiple broadcast strategy such as pad broadcasting;
Playing task performance element, for the playlist description document of playing task selected according to playing task scheduling unit, performs playing task;
Play abnormal examination unit, the playing task play whether is had for regular check, if not, then select playing task, and for each viewing area in playing task, start a Play Control thread play for the programme content controlling separately this viewing area respectively, a logging timestamp array is set simultaneously, each logging timestamp element in described logging timestamp array preserves the Play Control information of different Play Control thread respectively, described Play Control information includes Play Control Thread Id, the viewing area ID controlled, the material content type that viewing area is being play is (as picture, video etc.), refresh interval, the information such as refresh time stamp, if, logging timestamp element then one by one in inspection record timestamp array, and continue to judge whether difference that the refresh time of current time and described logging timestamp element stabs exceedes the refresh interval of described logging timestamp element, if, then illustrate that the Play Control thread that described logging timestamp element is corresponding is in abnormality, reclaim the Play Control thread that described logging timestamp element is corresponding, then a new Play Control thread is restarted for substituting the Play Control thread be recovered, and the refresh time of described logging timestamp element stamp is updated to current time, continue the next record timestamp element in inspection record timestamp array, until check out all logging timestamp elements,
Play Control thread units, for controlling separately the broadcasting of the programme content of a viewing area in playing task, and according to corresponding to the refresh interval of logging timestamp element of this Play Control thread in logging timestamp array, the refresh time of described logging timestamp element stamp is updated to current time by timing.
Can not play in order to ensure electrical screen terminal and be distorted or other improper modes download the content be implanted in electrical screen terminal by manual, multimedia radio hookup platform can also include:
Material sampling signature apparatus, for adopting random sampling algorithms, several data are extracted respectively from each material element files of playing task, then cryptographic algorithm is adopted to calculate the signing messages of each material element files, finally the playing task including material download description inventory is sent to electrical screen terminal, described material is downloaded to describe in inventory and is included each material element files ID, material element files title, material element files download URL, the signing messages of material element files size and material element files, wherein, md5 cryptographic algorithm can be adopted to carry out digital signature to material element files,
Electrical screen terminal can also include:
Material signature authentication device, before preparing to play to each material element files in playlist description document at broadcasting final controlling element, reading and saving is at the material element files of this locality, and judge that whether the size of described material element files is in the same size with the material element files in the material download description inventory of playing task, if not, then show that described material element files is illegal, skip described material element files, notice is play final controlling element and is continued to prepare to play to the next material element files in playlist description document; If, then adopt the random sampling algorithms consistent with multimedia radio hookup platform, several data are extracted from described material element files, then cryptographic algorithm is adopted to calculate the signing messages of described material element files, and continue to judge that whether the signing messages of described material element files is consistent with the signing messages of the material element files in material download description inventory, if so, then show that material element files is legal, notice is play final controlling element and is play described material element files; If not, then show that material element files is illegal, skip described material element files, notice is play final controlling element and is continued to prepare to play to the next material element files in playlist description document.
Described random sampling algorithms from material element files, can choose the data of m bit byte again after n-bit byte, and wherein, the value of sampling parameter n, m can be arranged according to actual needs flexibly, and can also regularly adjust, to guarantee safety.
The present invention can also by electrical screen terminal external camera, above the display screen being arranged on electrical screen terminal, evaluates, described electrical screen terminal external camera to the actual effect that multimedia messages is play by camera,
Electrical screen terminal also includes:
Multimedia effect reporting device, for running recognition of face and track algorithm, guarded region is entered until when leaving when there being a face, record the viewing duration of described spectators, effective spectators' number is added one, wherein, described recognition of face and track algorithm can adopt the Face detection and tracking method based on Camshift and particle filter algorithm simultaneously, finally the real-time data such as viewing duration by current play content and effectively spectators' number, each spectators are reported to multimedia to broadcast platform
Multimedia radio hookup platform also includes:
Multimedia effect analysis device, for carrying out tabulate statistics to the data of all electrical screen terminal to report, according to effective spectators' number and the viewing duration of different play content, the interest tendency of the spectators of assessment different location (such as: for the different advertising films play in the same time period, add up the effective spectators' number in each advertising film playing process, then evaluate according to effective spectators' number the adline or advertised product that spectators prefer), and adjust play content according to the interest tendency of spectators, thus reach the precisely efficient input of multimedia content.
Described electrical screen terminal can support wired, 3G, WIFI tri-kinds of networking modes:
1) electrical screen terminal can be passed through wired ethernet (as RJ45 cable interface) and is connected to network, and electrical screen terminal can arrange DHCP (i.e. Dynamic Acquisition IP) or static IP.
2) electrical screen terminal can be connected to 3G network by the mode of extrapolation 3G network interface card and networks: after electrical screen terminal detects wireless Internet card, by the process automatically starting card of surfing Internet carry according to event, change and dial up on the telephone, be connected to 3G network, without the need to manually operating.
3) electrical screen terminal can be connected to network by external WIFI card of surfing Internet by WIFI, can search for WIFI hot spot, select the connection by cipher modes such as WEP/WPA.
Electrical screen terminal can pass through HDMI (Chinese: HDMI (High Definition Multimedia Interface)), VGA (Chinese: display drawing array) or CVBS (Chinese: Composite Video Baseband Signal) interface connects display device, as television set, display, placard screen etc.An electrical screen terminal can adopt HDMI, VGA, CVBS interface to connect three display devices simultaneously, plays same content of multimedia.An electrical screen terminal can be passed through frequency divider (HDMI frequency divider, VGA frequency divider) and connect multiple display device simultaneously, plays same content of multimedia.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.

Claims (15)

1. an electronic multimedia screen radio hookup management method, is characterized in that, when administrative staff are electrical screen terminal interpolation task by multimedia radio hookup platform, includes:
The task code of electrical screen terminal searched by multimedia radio hookup platform, and by binary location 1 corresponding with the task type of task on the task code of described electrical screen terminal, the task of described electrical screen terminal is stored in task data sheet corresponding to task type simultaneously, described task code is the bit string of a multidigit, each binary digit in task code represents a task type respectively, its value is 1 indicate task, and 0 represents not have task
When electrical screen terminal sends task polling message to obtain corresponding task to multimedia radio hookup platform, also include:
The task code of electrical screen terminal searched by multimedia radio hookup platform, and judge whether each binary digit on the task code of described electrical screen terminal is 1 one by one, if, then corresponding according to described binary digit task type, the task of described electrical screen terminal is extracted from the task data sheet that task type is corresponding, then be that the task of the electrical screen terminal of 1 correspondence is synthesized a task message and sent to described electrical screen terminal by binary digits all on described task code, when described task message sends successfully, finally all binary digits above-mentioned task code being 1 are set to 0,
When there being new electrical screen terminal to be connected to multimedia radio hookup platform, also include:
Whether the inquiry of multimedia radio hookup platform preserves the timestamp that described new electrical screen terminal is connected to multimedia radio hookup platform, if not, then notify that electrical screen terminal is to the registration of multimedia radio hookup platform, and after the success of electrical screen endpoint registration, store electrons screen terminal is connected to the timestamp of multimedia radio hookup platform, then the group task that the group attribute of described new electrical screen terminal is corresponding is searched, finally according to the task type of group task, by binary location 1 corresponding with the task type of described group task on the task code of described new electrical screen terminal.
2. method according to claim 1, is characterized in that, when electrical screen terminal local is without available playlist description document, electrical screen terminal initiatively will send the message of application initialization task to multimedia radio hookup platform, also include:
The all tasks of belonging to this electrical screen terminal in multimedia radio hookup platform query task tables of data, and the task status of wherein not out of date task is set to be obtained, simultaneously by binary location 1 corresponding with the task type of described not out of date task in the task code of this electrical screen terminal.
3. method according to claim 1, is characterized in that, when electrical screen terminal receive multimedia radio hookup platform send task message time, include further:
Step B1, electrical screen terminal extract a task one by one from the task message that multimedia radio hookup platform sends, and resolve the task type of described task;
Whether step B2, the task type judging described task are configuration tasks, and if so, then middle parameter configuration of specifying of executing the task, then turns to step B7; If not, then next step is continued;
Whether step B3, the task type judging described task are control tasks, and if so, then the control command in executing the task, then turns to step B7; If not, then next step is continued:
Whether step B4, the task type judging described task are that operating state reports task, if so, then collect and report the electrical screen terminal data required in task, then turning to step B7; If not, then next step is continued;
Whether step B5, the task type judging described task are playing task, if, then download according to the material in playing task and describe inventory, download one by one and all material element files preserved in playing task in this locality, then perform Play Control according to the playlist description document in playing task, then turn to step B7; If not, then next step is continued;
Step B6, judge that whether the task type of described task is report task broadcasting content, if so, then to the screen shot play, and the screen shot information of screenshot picture will be included, report multimedia radio hookup platform by the interaction protocol of HTTP+XML, then turn to step B7; If not, then next step is continued;
Step B7, judge whether to have extracted all tasks from task message, if so, then this flow process terminates; If not, then step B1 is turned to.
4. method according to claim 3, is characterized in that, in described step B6, electrical screen terminal sends continuous screenshotss information to multimedia radio hookup platform, includes further:
Step B61, multimedia radio hookup platform receives the screen shot information that electrical screen terminal is sent, described screen shot information is kept at the tail of the queue of the screen shot message queue of described electrical screen terminal, and the current queue size of the screen shot message queue of described electrical screen terminal is returned to electrical screen terminal, meanwhile, according to the queuing principle of first in first out, from the screen shot message queue of electrical screen terminal, extract screen shot information one by one and show;
Step B62, electrical screen terminal receive the current queue size of the screen shot message queue that multimedia radio hookup platform returns, and judge whether described current queue size equals queue maximum N, if, then electrical screen terminal stops sending screen shot information to multimedia radio hookup platform, and this flow process terminates; If not, then continue to send screen shot information to multimedia radio hookup platform, turn to step B61.
5. method according to claim 1, is characterized in that, electrical screen terminal is to playing task automatic inspection and repair, and includes:
Whether step C1, regular check have the playing task play, and if not, then continue step C2; If so, then step C3 is continued;
Step C2, a playing task is selected to play, and start a Play Control thread play for the programme content controlling separately this viewing area respectively for each viewing area in playing task, a logging timestamp array is set simultaneously, each logging timestamp element in described logging timestamp array preserves the Play Control information of different Play Control thread respectively, described Play Control information includes Play Control Thread Id, the viewing area ID controlled, the material content type that viewing area is being play, refresh interval, refresh time stabs, all Play Control threads are by according to the refresh interval of logging timestamp element corresponding to this Play Control thread in logging timestamp array, the refresh time of described logging timestamp element stamp is updated to current time by timing, turn to step C1,
Step C3, logging timestamp element one by one in inspection record timestamp array, and judge whether difference that the refresh time of current time and described logging timestamp element stabs exceedes the refresh interval of described logging timestamp element, if, then reclaim the Play Control thread that described logging timestamp element is corresponding, then a new Play Control thread is restarted for substituting the Play Control thread be recovered, and the refresh time of described logging timestamp element stamp is updated to current time, continue the next record timestamp element in inspection record timestamp array, when checking out all logging timestamp element rear steering step C1, if not, then the next record timestamp element in inspection record timestamp array is continued, when checking out all logging timestamp element rear steering step C1.
6. method according to claim 1, is characterized in that, can not play and be distorted or other improper modes download the content be implanted in electrical screen terminal by manual, also include in order to ensure electrical screen terminal:
Step D1, multimedia radio hookup platform adopts random sampling algorithms, several data are extracted respectively from each material element files of playing task, then cryptographic algorithm is adopted to calculate the signing messages of each material element files, finally the playing task including material download description inventory is sent to electrical screen terminal, described material downloads the signing messages describing and include each material element files ID, material element files title, material element files download URL, material element files size and material element files in inventory;
Step D2, electrical screen terminal receive playing task, then download according to described material the material element files download URL described in inventory and download the relevant all material element files of this playing task and be kept at this locality;
Before electrical screen terminal prepares to play to each material element files in playlist description document, also include:
Step e 1, the material element files of electrical screen terminal reading and saving in this locality;
Step e 2, to judge that whether the size of described material element files downloads with the material of playing task the material element files described in inventory in the same size, if so, then continues step e 3; If not, then skip described material element files, continue to prepare to play to the next material element files in playlist description document, turn to step e 1;
Step e 3, electrical screen terminal adopt the random sampling algorithms consistent with multimedia radio hookup platform, several data are extracted from described material element files, then cryptographic algorithm is adopted to calculate the signing messages of described material element files, and judge that whether the signing messages of described material element files is consistent with the signing messages of the material element files in material download description inventory, if so, then described material element files is play; If not, then skip described material element files, continue to prepare to play to the next material element files in playlist description document, turn to step e 1.
7. method according to claim 1, is characterized in that, by electrical screen terminal external camera, evaluates, include the actual effect that multimedia messages is play:
Step F 1, the recognition of face of electrical screen terminal operating and track algorithm, when there being a face to enter guarded region until when leaving, the viewing duration of record spectators, adds one by effective spectators' number simultaneously;
The viewing duration of current play content and effectively spectators' number, each spectators is reported to multimedia to broadcast platform by step F 2, electrical screen terminal in real time;
The data of step F 3, multimedia radio hookup platform to all electrical screen terminal to report carry out tabulate statistics, according to effective spectators' number and the viewing duration of different play content, the interest tendency of the spectators of assessment different location, and adjust play content according to the interest tendency of spectators, thus reach the precisely efficient input of multimedia content.
8. an electronic multimedia screen radio hookup management system, is characterized in that, includes multimedia radio hookup platform and several electrical screen terminals, wherein:
Multimedia radio hookup platform, for be each electrical screen terminal definitions task code, described task code is the bit string of a multidigit, and each binary digit in task code represents a task type respectively, and its value is 1 indicate task, and 0 expression there is not task, when administrative staff are electrical screen terminal interpolation task by multimedia radio hookup platform, search the task code of electrical screen terminal, and by binary location 1 corresponding with the task type of task on the task code of described electrical screen terminal, the task of described electrical screen terminal is stored in task data sheet corresponding to task type simultaneously, when electrical screen terminal sends task polling message to obtain corresponding task to multimedia radio hookup platform, search the task code of electrical screen terminal, and judge whether each binary digit on the task code of described electrical screen terminal is 1 one by one, if, then corresponding according to described binary digit task type, the task of described electrical screen terminal is extracted from the task data sheet that task type is corresponding, then be that the task of the electrical screen terminal of 1 correspondence is synthesized a task message and sent to described electrical screen terminal by binary digits all on described task code, when described task message sends successfully, finally all binary digits above-mentioned task code being 1 are set to 0,
Electrical screen terminal, for adopting the mechanism of automatic regular polling, timing carries out task poll to obtain task to multimedia radio hookup platform, and task described in scheduled for executing, on screen, show play content simultaneously,
Described multimedia radio hookup platform and electrical screen terminal are connected by network,
Described multimedia radio hookup platform includes further:
Autotask distributing device, for when there being electrical screen terminal to be connected to multimedia radio hookup platform, whether inquiry preserves the timestamp that described electrical screen terminal is connected to multimedia radio hookup platform, if not, then notify that electrical screen terminal is to the registration of multimedia radio hookup platform, and after the success of electrical screen endpoint registration, store electrons screen terminal is connected to the timestamp of multimedia radio hookup platform, then the group task that the group attribute of described electrical screen terminal is corresponding is searched, finally according to the task type of group task, by binary location 1 corresponding with the task type of described group task on the task code of described electrical screen terminal.
9. system according to claim 8, is characterized in that, described multimedia radio hookup platform includes further:
Task status management devices, obtains state information for returning to multimedia radio hookup platform according to electrical screen terminal of task, upgrades the task status of corresponding task in task data sheet; When receiving electrical screen terminal and sending the message of application initialization task to multimedia radio hookup platform, the all tasks of belonging to this electrical screen terminal in query task tables of data, and the task status of wherein not out of date task is set to be obtained, simultaneously by binary location 1 corresponding with the task type of described not out of date task in the task code of this electrical screen terminal.
10. system according to claim 8, is characterized in that, described electrical screen terminal includes:
Task receiving system, for extracting each task one by one from the multimedia radio hookup platform task message of sending, and resolving the task type of task, then according to task type, described task being transmitted to other devices and processing;
Play final controlling element, for according in playing task material download describe inventory, download one by one and all material element files preserved in playing task in this locality, then according in playing task playlist description document perform Play Control;
Broadcast content reporting device, for the screen shot play, and will the screen shot information of screenshot picture included, report multimedia radio hookup platform by the interaction protocol of HTTP+XML.
11. systems according to claim 10, is characterized in that, described electrical screen terminal also includes:
Configuration final controlling element, for middle parameter configuration of specifying of executing the task;
Control final controlling element, for the control command in executing the task;
Operating state reporting device, for collecting and reporting the electrical screen terminal data required in task.
12. systems according to claim 10, is characterized in that, including further broadcasting content reporting device of described electrical screen terminal:
Continuous screenshotss report unit, for sending screen shot information to multimedia radio hookup platform, obtain the current queue size of the screen shot message queue that multimedia radio hookup platform returns, and judge whether described current queue size equals queue maximum N, if so, then stop sending screen shot information to multimedia radio hookup platform, if not, then continue to send screen shot information to multimedia radio hookup platform
Described multimedia radio hookup platform also includes:
Continuous screenshotss management devices, for receiving the screen shot information that electrical screen terminal is sent, described screen shot information is kept at the tail of the queue of the screen shot message queue of described electrical screen terminal, and the current queue size of the screen shot message queue of described electrical screen terminal is returned to electrical screen terminal, meanwhile, according to the queuing principle of first in first out, from the screen shot message queue of electrical screen terminal, extract screen shot information one by one and show.
13. systems according to claim 10, is characterized in that, the broadcasting final controlling element of described electrical screen terminal includes further:
Play abnormal examination unit, the playing task play whether is had for regular check, if not, then select playing task, and start a Play Control thread play for the programme content controlling separately this viewing area respectively for each viewing area in playing task, a logging timestamp array is set simultaneously, each logging timestamp element in described logging timestamp array preserves the Play Control information of different Play Control thread respectively, described Play Control information includes Play Control Thread Id, the viewing area ID controlled, the material content type that viewing area is being play, refresh interval, refresh time stabs, if, logging timestamp element then one by one in inspection record timestamp array, and continue to judge whether difference that the refresh time of current time and described logging timestamp element stabs exceedes the refresh interval of described logging timestamp element, if, then reclaim the Play Control thread that described logging timestamp element is corresponding, then a new Play Control thread is restarted for substituting the Play Control thread be recovered, and the refresh time of described logging timestamp element stamp is updated to current time, continue the next record timestamp element in inspection record timestamp array, until check out all logging timestamp elements,
Play Control thread units, for controlling separately the broadcasting of the programme content of a viewing area in playing task, and according to corresponding to the refresh interval of logging timestamp element of this Play Control thread in logging timestamp array, the refresh time of described logging timestamp element stamp is updated to current time by timing.
14. systems according to claim 10, is characterized in that, can not play in order to ensure electrical screen terminal and be distorted or other improper modes download the content be implanted in electrical screen terminal by manual, multimedia radio hookup platform also includes:
Material sampling signature apparatus, for adopting random sampling algorithms, several data are extracted respectively from each material element files of playing task, then cryptographic algorithm is adopted to calculate the signing messages of each material element files, finally the playing task including material download description inventory is sent to electrical screen terminal, described material downloads the signing messages describing and include each material element files ID, material element files title, material element files download URL, material element files size and material element files in inventory;
Electrical screen terminal also includes:
Material signature authentication device, before preparing to play to each material element files in playlist description document at broadcasting final controlling element, reading and saving is at the material element files of this locality, and judge that whether the size of described material element files is in the same size with the material element files in the material download description inventory of playing task, if not, then skip described material element files, notice is play final controlling element and is continued to prepare to play to the next material element files in playlist description document; If, then adopt the random sampling algorithms consistent with multimedia radio hookup platform, several data are extracted from described material element files, then cryptographic algorithm is adopted to calculate the signing messages of described material element files, and continue to judge that whether the signing messages of described material element files is consistent with the signing messages of the material element files in material download description inventory, if so, then notice is play final controlling element and is play described material element files; If not, then skip described material element files, notice is play final controlling element and is continued to prepare to play to the next material element files in playlist description document.
15. systems according to claim 8, is characterized in that, described electrical screen terminal supports wired, 3G, WIFI tri-kinds of networking modes:
1) electrical screen terminal is connected to network by wired ethernet, and electrical screen terminal arranges Dynamic Acquisition IP or static IP;
2) electrical screen terminal is connected to 3G network by the mode of extrapolation 3G network interface card and networks: after electrical screen terminal detects wireless Internet card, by the process automatically starting card of surfing Internet carry according to event, change and dial up on the telephone, be connected to 3G network;
3) electrical screen terminal is connected to network by external WIFI card of surfing Internet by WIFI,
Electrical screen terminal connects display device by HDMI, VGA or CVBS interface, an electrical screen terminal adopts HDMI, VGA, CVBS interface to connect three display devices simultaneously, or connect multiple display device by frequency divider, to play same content of multimedia simultaneously.
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