CN100348024C - Method for improving event information extraction efficiency - Google Patents
Method for improving event information extraction efficiency Download PDFInfo
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- CN100348024C CN100348024C CNB2004100181713A CN200410018171A CN100348024C CN 100348024 C CN100348024 C CN 100348024C CN B2004100181713 A CNB2004100181713 A CN B2004100181713A CN 200410018171 A CN200410018171 A CN 200410018171A CN 100348024 C CN100348024 C CN 100348024C
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- 238000012545 processing Methods 0.000 abstract description 8
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- 239000002699 waste material Substances 0.000 abstract 1
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- 238000012544 monitoring process Methods 0.000 description 7
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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
- H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
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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
- H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
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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
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4345—Extraction or processing of SI, e.g. extracting service information from an MPEG stream
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Abstract
The present invention relates to a method for improving event information extraction efficiency, which is realized by placing an event information manager in a digital TV receiving device. The event information manager comprises a data cache area, a data loader, a data analyzer, a monitor and a manager. The method previously loads data, directly stores analyzed event information data in the cache area, can directly acquire needed data without further processing and avoids the waste of time of system resources, which is caused by multiple loading and analysis needed by multiple application invoking information. Simultaneously, the present invention provides a method for acquiring all event information data in a certain time period, improves the use efficiency of the data cache area and integrally enhances response speed and efficiency of application under the condition of low cost.
Description
Technical field
The present invention relates to the method for a kind of raising event information (EIT) extraction efficiency, belong to Digital Television reception technique field.
Background technology
The apparatus of digital television receiving general reference can receive, decodes and show the hardware device of digital television signal, and it is applied to digital TV field, is the terminal (see figure 1) that the simulated television digitlization is achieved.What apparatus of digital television receiving received is digitized image and data message, therefore, be different from the reception and the processing of traditional anolog TV signals, apparatus of digital television receiving is to be undertaken by its inner CPU and coupled peripheral components to the reception and the processing of digitized image information and data.Receiving system is exactly to develop the application program that apparatus of digital television receiving is suitable on the basis of relevant hardware and operating system; Equally, some professional digital broadcast content service providers also need to go out corresponding service software according to the hardware performance and the functional development of different apparatus of digital television receiving.
In the broadcasting equipment of TV station or television operator, audio-video signal mixes with the multiplexer of data content through front end, forms transport stream (TS stream).Transport stream forms electromagnetic signal through ovennodulation and is sent in the apparatus of digital television receiving.Apparatus of digital television receiving (set-top box) work principle is as follows:
◆ tuning/selection module receives electromagnetic signal and selects the bandwidth of certain limit.
◆ demodulation module is conversion of signals data flow (Bitstreams).
◆ demultiplexing module is extracted expectation information out and it is offered different decoders with suitable manner from data flow (Bitstreams), it comprises the descrambler with the Conditional Access Module cooperation.
◆ the video bit stream in the image sequence that the video decode module converts shows.
◆ the audio bit stream in the audio decoder module converts simulated audio signal.
◆ graphics engine set up graph layer before sending with it with to the video mix in the analog signal request of PAL/NTSC.
◆ the front control board is partly explained by receiving the user command that remote controller, Wireless Keyboard or front panel send.
Video bit stream mixes with image through image processor mutually with audio bit stream, becomes the audio-video signal of simulation, outputs on the display screen (television set).Data flow then flow among the CPU by demodulation multiplexer, is handled by the system program of going up operation at central processing unit (CPU).The result who handles can mix with audio/video flow, outputs on the display device.
Event Information Table (EIT-Event Information Table) is a kind of frequently-used data form in the digital television business information, and it provides the information of an incident that business comprised in chronological order.The structure flexibly of event information table definition can be transmitted multiple information, and can be expanded with the self-defining data of transmission user.When transmitting in network, Event Information Table is cut into the event information section and is encapsulated in transport stream (TS-Transport stream) bag, and wherein each section all has complete structure.After receiving equipment was received the TS bag, (Demux) decomposited original fragment by demodulation multiplexer.With certain hour interval broadcast (sites) in turn, the content of broadcasting may change Event Information Table in time in network, and this is determined by the data broadcasting system.
The data of transmitting in the Event Information Table are bases that electronic program guides (EPG) is used, and also can be used to be simultaneously other application service, as data broadcasting etc.
In existing apparatus of digital television receiving technology, generally do not have reception, storage and the analytic technique of well-defined Event Information Table data, and do not have the variation automatic monitoring technical and the ordering retrieval technique of event information.General receiving equipment all is when needing the time spent directly to extract from real-time digital television signal.Because the data content of Event Information Table is big, receiving equipment does not generally have enough spaces to be used for preserving all information, the broadcasting of simultaneous events information table has long cycle again, it is long that the shortcoming of this method that directly receives from network is exactly the time of waiting for, the longlyest reach several seconds to tens seconds, be unfavorable for the development requires application of response fast.And the data that receive from network are unprocessed form, just can obtain available data through dissection process, if there are a plurality of application all to need to use event information, same data, the situation of parsing repeatedly just may occur repeatedly getting, have wasted the resource of system.
Method of the present invention is exactly the solution that proposes at the deficiency of conventional art.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method that improves the event information extraction efficiency, the benefit of this method is exactly by dynamically being provided with buffer area in Digital Television receives, come load event information data in advance, data can be directly extracted in feasible application from the data buffer zone, thereby improve the reception and the access efficiency of event information data.
The present invention is resolved above problem by following technical scheme.A data buffering area is set in the internal memory of apparatus of digital television receiving, from digital TV data signal (data flow, perhaps TS stream) the Event Information Table data of obtaining in advance in, resolve the Event Information Table data, obtain the data of application need, storage in the data buffer zone, is directly extracted required data from the data buffer zone during application.
Describe technical scheme of the present invention below in detail.
The step of this method:
This method is to realize an event information managing device in apparatus of digital television receiving, and it forms (as shown in Figure 2) by five parts:
Engine: be responsible for providing external shared interface, and coordinate the task execution of this each module of system;
Loader: be responsible for loading the EPG list data, and offer the Analyser module;
Analyzer: be responsible for resolving relevant EPG data, and be stored among the Cache;
Cache: be responsible for the relevant EPG data of storage, and ordering, search function are provided;
Monitoring: the version of being responsible for Monitor EPG list data changes, and notice Loader carries out the loading of data.
Art designs of the present invention mainly is divided into following content:
The first step: from transport stream (TS stream), be written into event information data;
Second step: resolve according to concrete information data, discharge unwanted data to save memory headroom;
The 3rd step: in the data buffer zone, the while is according to time series sort (data store organisation is seen Fig. 3) with concrete content stores;
The 4th step: the interface that application program just can provide by Engine as required sorts.
The further feature of technical scheme of the present invention is to have designed a Monitoring module, and it is used for the variation of monitor event information data.If it has detected variation, just can be by the mode notification application of transmission incident, application program just can indicate the Engine module with Data Update among the Cache.
Being further characterized in that of technical scheme of the present invention, when loading data, can be according to the priority of the automatic processing time information data of time series.That is to say, in the data loading process, the n days EIT information that some Service (as service A) might occur are not also loaded and buffer memory is not much of that, and the EIT information of some service (such as service B) installed to m days (m＞n), need this moment EPGcache can remove at least the information of service B m days (even m-1 days) automatically (except the situation of m=n+1, and n days the information of loading Service A.That is to say that still more approaching EIT information has higher priority the time of unloaded, they should be loaded.
Being further characterized in that of technical scheme of the present invention, when visit data, it is retrieved according to time requirement.That is to say that it can return all data of certain hour section as required, be convenient to be used for showing these data like this.
Compare with background technology, advantage of the present invention is:
◇ has designed a modular event information managing device, and it provides the method for an efficient access event information by loading, parsing, buffer memory and monitor event information to application;
◇ this method can be returned data according to time series ordering to application, like this application just can be successively presented event information in proper order.
◇ this method in buffer memory, when a plurality of application while during visit data, need not the storage of resolving to load once more and resolution data, has saved the time of data access greatly.
Below in conjunction with accompanying drawing, method of the present invention is further described.
Description of drawings:
Fig. 1 is the block diagram of digital television devices work.Digital television signal enters receiving equipment, through the processing of demodulation Multiplexing module, audio-video signal and data-signal is separated, and event information data entrained in the data-signal is used to be presented at television screen through handling and storage.
Fig. 2 has shown the module composition frame chart of incident information manager.Each module has certain project organization and function.
Fig. 3 has represented the storage organization of event information, through event description of resolving together according to the structural nexus of its kind and incident, and the extraction of being convenient to use.
Fig. 4 has represented two threads that the present invention creates: loader thread and monitor thread.This creates when the initialization of this method.Not directly contact between these two threads, they all are to get in touch with the external world by Engine submodule (assembly).
The loader thread that Fig. 5 represents (loader thread) event handling state variation,
Fig. 6 is EIT data loading process figure, and its expression data flow mainly is the EITs information of transmitting between Loader, Analyzer and three submodules of Cache.Fig. 5 and Fig. 6 example have illustrated the operating process key of Loader module.
Fig. 7 has shown the method for work of Monitoring module in this method.The major part of Monitoring is the Monitor thread.When it monitored the variation of EIT, it was that the Engine module is removed loading data.When the Loader module received the message of LOAD, call number television equipment demultiplexing drove and goes to load relevant data.When corresponding EIT data obtained, the Loader module received data and calls Analyzer (parsing) module and resolve, and told about then among storage and the Cache.
The present invention is described in further detail below in conjunction with accompanying drawing and concrete embodiment.
Embodiment:
1) filling of execution mode 1:Cache
The filling of Cache is carried out by application program (Navigator of system, EPG use or certain other application).(promptly before using the event information managing device) must call earlier according to the initialization function the Cache module initialization before starting Engine.The filling of Cache can be adopted following manner:
(1) explicit loading: be provided with in the application in the receiving equipment system, one specific " EPG information scanning " menu is arranged, after calling this menu, system is provided with application according to the TS information in the receiving equipment SI database, is that unit one by one is written into EIT information among the Cache with the sky.In loading process, if a plurality of TS streams are arranged, also need automatically tune to corresponding TS stream, load corresponding data.The Loader module can also be loaded for unit in the sky;
(2) implicit expression is loaded: in one used, in the time of on switching to a new TS stream, the application call incident was loaded the function loading data, represented that when receiving the MBT_EC_EV_EBGINE_DATA_LOADED incident EPG data loading of current TS stream is finished; Channel will switch to new TS stream if last loading is not finished as yet, needed to call to stop to load function and stop this time to load before switching, and the EPG information of carrying out new TS stream be loaded.
(3) electronic program guide application is loaded: when electronic program guide application is obtained required event information and when having no resolution, the incident of calling is loaded the appointment sky of the channel that the function requirement loads appointment and the EPG information of time period;
2) execution mode 2: the loading of event information
The loading of event information (EIT) is undertaken by the Loader module, and its job step is as follows:
The Loader module mainly is to move in the loader thread, and it has 2 callback:
1) ActivateCallback (LoaderActivateEvent * event): by LoaderActivateEvent, Loader obtains the data that need to load related parameter, and startup DataLoad drives the load data;
2) DataReceivedCallback (DataLoadedEvent * event): by DataLoadedEveilt, Loader obtains the data (EIT sections) of having loaded, and the relevant function that calls Analyzer then carries out the analysis of data.When not having data to load, the loader thread is in " wait " state.
The following 6 kinds of message of type of message and associative operation Loader module definition:
1)MBT_EC_EV_ENGINE_TO_START
2)MBT_EC_EV_ENGINE_STARTED
3)MBT_EC_EV_ENGINE_DATA_LOADEDX
4)MBT_EC_EV_ENGINE_TO_STOP
5)MBT_EC_EV_ENGINE_STOPPED
6)MBT_EC_EV_CACHE_UPDATED
Wherein, TO_START, T0_STOP be Engine module or Monitoring module when they require the Loader loading data, send to the Loader module, the Loader module should be known to the data of exploring required loading on the TS (ts_id sign).Above-mentioned other incident is that the Loader submodule is to extraneous events broadcast.
ActivateCallback () does following processing after receiving relevant information:
1) when message be MBT_EC_EV_ENGINE_TO_START: according to the gained data, start the EITsection data and load, and outside broadcast event: MBT_EC_EV_ENGINE_STARTED.
2) when message be MBT_EC_EV_ENGINE_TO_STOP: then stopping the EIT data must load, and outside broadcast event: MBT_EC_EV_ENGlNE_STOPPED.
DataReceivedCallback () is used for monitoring apparatus of digital television receiving demultiplexing driving data load event.The Loader submodule is outwards broadcast the MBT_EC_EV_ENGINE_DATA_LOADED incident receiving after all get the EIT data on the TS.
The Loader module is after receiving the EIT data, and the analytic function of synchronization call Ahalyzer submodule is used for the EIT form is resolved.Data after the parsing directly are stored among the Cache.
3) execution mode 3: the obtaining of event information
The modal user of event information managing device is exactly electronic program guides (EPG--ElectronicProgram Guide).The implementation that electronic program guides is general is exactly to utilize the event information that front end system broadcasts to form a program guide, wherein can comprise the content introduction etc. of time started, duration and the program of a program.The EPG application is as follows from the step that Cache obtains data:
(1) when EPG starts, the form of at this moment generally pressing Grid shows that according to the regular hour window, recalls information is obtained the event information that function obtains to be needed;
(2) pressed search key (as searching by type) as the user, according to selected type, recalls information is obtained function and is obtained required event information by needed ordering.
It should be noted last that: the present invention is to provide a kind of method and design philosophy thereof that improves the event information extraction efficiency, above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1, a kind of method that improves the event information extraction efficiency is characterized in that, described method comprises: at apparatus of digital television receiving a data buffering area is set, obtains Event Information Table in advance from data flow or TS stream; Resolve Event Information Table; Storage after will resolving according to time sequencing is in the data buffer zone; Obtain the data of application need, directly from the data buffer zone, extract required data during application.
2, a kind of method that improves the event information extraction efficiency according to claim 1, it is characterized in that the step of storage in the data buffer zone after will resolving according to time sequencing is: the not storage storage that the time is nearest is in the data buffer zone.
3, a kind of method that improves the event information extraction efficiency according to claim 1, it is characterized in that, also comprise: by detecting the variation of Event Information Table start context field in the data flow, monitor the situation of the variation of event information in the transport stream, the data in the data buffer zone that upgrades in time.
4, according to any one described a kind of method that improves the event information extraction efficiency among the claim 1-3, it is characterized in that, also comprise: arrange the data in the return data buffering area in the certain hour section according to time sequencing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100181713A CN100348024C (en) | 2004-05-09 | 2004-05-09 | Method for improving event information extraction efficiency |
| PCT/CN2005/000625 WO2005109868A1 (en) | 2004-05-09 | 2005-05-08 | A method for improving the efficiency of extracting eit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100181713A CN100348024C (en) | 2004-05-09 | 2004-05-09 | Method for improving event information extraction efficiency |
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| CN1571484A CN1571484A (en) | 2005-01-26 |
| CN100348024C true CN100348024C (en) | 2007-11-07 |
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| CNB2004100181713A Expired - Lifetime CN100348024C (en) | 2004-05-09 | 2004-05-09 | Method for improving event information extraction efficiency |
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| WO (1) | WO2005109868A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101980528A (en) * | 2010-10-22 | 2011-02-23 | 四川长虹电器股份有限公司 | Method for quickly accessing EPG service |
| CN104427373A (en) * | 2013-09-06 | 2015-03-18 | 中兴通讯股份有限公司 | IPTV (Internet Protocol Television)-based data processing method and terminal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040002231A (en) * | 2002-06-29 | 2004-01-07 | 주식회사 휴맥스 | Method for managing an electronic program guide in digital broadcast ing receiver |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6442756B1 (en) * | 1998-10-13 | 2002-08-27 | Bellsouth Intellectual Property Corporation | System and method for transporting, processing, storing and displaying EIT and EPG information in a television system context |
| JP2003046890A (en) * | 2001-08-02 | 2003-02-14 | Sony Corp | Digital broadcasting receiver and method for processing additional information therein |
| JP3918917B2 (en) * | 2002-01-11 | 2007-05-23 | 船井電機株式会社 | Digital / analog broadcast receiver with EPG screen display function |
| JP3961328B2 (en) * | 2002-03-29 | 2007-08-22 | 三菱電機株式会社 | Reception method, receiver, and television receiver |
-
2004
- 2004-05-09 CN CNB2004100181713A patent/CN100348024C/en not_active Expired - Lifetime
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040002231A (en) * | 2002-06-29 | 2004-01-07 | 주식회사 휴맥스 | Method for managing an electronic program guide in digital broadcast ing receiver |
Non-Patent Citations (4)
| Title |
|---|
| DVB服务信息的提取方法研究 蔡希羚，陈惠民.上海大学学报（自然科学版），第9卷第6期 2003 * |
| 基于DVB-SI的数字有线电视机顶盒的电子节目指南的设计及实现 王景存，王瑞胡.中国数据通信，第6卷第1期 2004 * |
| 数字电视信息在机顶盒中的应用 张懿，赵清华，付岩，王华奎.太原理工大学学报，第34卷第1期 2003 * |
| 数字电视机顶盒接收PSI/SI信息的过程及EPG的实现 陈焕经，王振强.有线电视技术，第15期 2003 * |
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| Publication number | Publication date |
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| CN1571484A (en) | 2005-01-26 |
| WO2005109868A1 (en) | 2005-11-17 |
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