CN103596039A - Rapid and automatic program searching method for digital set top box - Google Patents
Rapid and automatic program searching method for digital set top box Download PDFInfo
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- CN103596039A CN103596039A CN201310543007.3A CN201310543007A CN103596039A CN 103596039 A CN103596039 A CN 103596039A CN 201310543007 A CN201310543007 A CN 201310543007A CN 103596039 A CN103596039 A CN 103596039A
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Abstract
The invention discloses a rapid and automatic program searching method for a digital set top box. The method includes the following steps that 1, a main frequency point is read and locked, the main frequency point is set in advance, and a front end broadcasts important data information required by automatic search on the main frequency point, wherein the important data information mainly comprises an NIT Actual table and an SDT; 2, the NIT Actual table broadcasted by the front end and the SDT broadcasted by the front end are received at the main frequency point; 3, the NIT Actual table and the SDT are analyzed; 4, frequency point information and program information are stored. Compared with the prior art, the rapid and automatic program searching method can effectively shorten automatic searching time and greatly improve the automatic searching speed as long as the front end broadcasts an SDT Other table at the main frequency point and without the needs that the front end changes data broadcasting configuration based on a traditional automatic searching method and the digital set top box receives and analyzes extra data.
Description
Technical field
The present invention relates to a kind of digital television techniques field, relate in particular to the method for the fast automatic searching programs of a kind of top box of digital machine.
Background technology
Development along with digital television techniques, top box of digital machine has been come into huge numbers of families on the one hand, become indispensable multi-media information terminal in family, the channel transmitting in digital TV network is on the other hand more and more, the particularly increase of high definition channel quantity, the frequency needing in digital TV network increases in numbers swiftly.And traditional program automatic search method, need to carry out tuning frequency locking to each frequency, and search for pat table under this frequency, pmt table, SDT Actual table and CAT and show, search for a frequency and need 4～5 seconds, if there are 40 frequencies in digital TV network, completing so whole automatic search just needs 160～200 seconds.The increase of digital TV network intermediate-frequeney point, will certainly increase the time of digital television program automatic search, thereby affects user's experience.
Due to the increase of digital television program, delete, adjustment etc., all need top box of digital machine to re-start automatic search, to complete the renewal of program, therefore, the execution frequency of digital television program automatic search can be more and more higher.So, how to improve the speed of top box of digital machine automatic search program, just become research contents and the target of scientific research personnel in vast digital TV field.
The a few thing person of Contemporary Digital TV domain has proposed the method for another kind of fast automatic search, the SI/PSI programme information that is about to each frequency extracts, the data protocol defining according to oneself generates program information table, and be packaged into TS code stream, at dominant frequency point, broadcast, during digital set top box boot, as long as receive and resolve this program information data, can complete the search of program.Compare with traditional automatic search method, the method can shorten the automatic search time effectively, but exists some shortcomings, first because program information table data are all to generate according to the data protocol of top box of digital machine manufacturer oneself definition, do not there is versatility, be unfavorable for promoting; Secondly the program information data that the programme information that front end is broadcast and extraction generate can not be synchronous in time, each front end change programme information, and attendant need to again extract, generates, packs, broadcast, and this will improve the cost of operation and maintenance greatly.
Summary of the invention
Object of the present invention is just that providing a kind of addresses the above problem, and energy is quick, general, the method for the fast automatic searching programs of top box of digital machine of easy care.
To achieve these goals, the technical solution used in the present invention is: the method for the fast automatic searching programs of a kind of top box of digital machine, and method step is as follows,
Step 1, reads and locks dominant frequency point, and dominant frequency point presets, front end has been broadcast the needed significant data information of automatic search on dominant frequency point, wherein mainly comprise NIT Actual table and SDT table, described SDT table is service information list, comprises SDT Actual table and SDT Other table;
Step 2, the NIT Actual broadcasting at dominant frequency point receiving front-end table and SDT table;
Step 3, resolves NIT Actual table and SDT table, resolves NIT Actual table and can obtain frequency point information all in current network, resolves SDT table and can obtain the essential information of all programs in current network;
Step 4, preserve frequency point information and programme information, by resolving all frequency point information and programme informations in the network that NIT Actual shows and SDT table obtains, be all stored in internal memory, when subsequent user is switched program, PMTPID, audio/video information, PCR control information, enciphered message that reception, parsing pat table, CAT table and pmt table obtain also can be preserved;
As preferably, NIT Actual table is current network information table, has comprised frequency point information all in current network, comprising network ID, transport stream ID and the modulation intelligence of each frequency;
As preferably, the business information that described SDT Actual table has comprised current frequency, the business information that described SDT Other table has comprised non-current frequency;
As preferably, in step 3, by receiving, resolve SDT table, obtain all program essential informations in current network, comprise network ID, transport stream ID, traffic ID, frequency information, program name, program category, program provider, but do not comprise, program is play and the information of deciphering;
As preferably, in step 2, can receive NIT Actual table, SDT Actual table and SDT Other table at dominant frequency point simultaneously;
As preferably, described SDT Other internal information of statement is that front end system generates automatically, and its programme information comprising is synchronizeed with the programme information of front-end configuration.
Compared with prior art, the invention has the advantages that: the present invention is a kind of method of top box of digital machine automatic search program of quick, general, easy care, the data that the method neither needs front end to change based on traditional automatic search method are broadcast configuration, do not need top box of digital machine to receive and resolve excessive data yet, as long as front end broadcasts SDT Other table at dominant frequency point, just can effectively shorten the time of automatic search, greatly improve automatic search speed.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention.
Embodiment
Embodiment: the invention will be further described below in conjunction with accompanying drawing.Referring to Fig. 1, the method for the fast automatic searching programs of a kind of top box of digital machine, comprises the following steps:
Step 1: read and lock dominant frequency point.Dominant frequency Dian You operator presets, and front end has been broadcast the needed significant data information of automatic search on dominant frequency point, wherein mainly comprises NIT Actual table and SDT table.NIT Actual table is current network information table, comprised frequency point information all in current network, comprising network ID, transport stream ID and the modulation intelligence of each frequency; SDT table is service information list, comprises SDTActual table and SDT Other table; Described SDT Actual has comprised the business information of current frequency; Described SDT Other has comprised the business information of non-current frequency, and both have completed the essential information such as network ID, transport stream ID, traffic ID, frequency information, program name, program category, program provider of all programs in whole network jointly.
General in the front-end configuration based on traditional automatic search, dominant frequency point only can be broadcast SDT Actual table, and can not broadcast SDT Other, do not show, but SDT Actual table has only comprised the essential information of all programs under current frequency, if front end is only broadcast SDT Actual table at dominant frequency point, top box of digital machine, when search dominant frequency point, just can only obtain the essential information of program under dominant frequency point, and cannot obtain the essential information of all programs under other frequency.Therefore,, as long as broadcast SDT Other table at front end, top box of digital machine, when search dominant frequency point, just can get in network the essential information of all programs under all frequencies.Because SDT Other table generates automatically for front end system, its programme information comprising is synchronizeed with the programme information of front-end configuration, does not need to carry out extra maintenance.
Step 2: receive NIT Actual table and SDT table at dominant frequency point.SDT table comprises SDT Actual table and SDT Other table, the reception of SDT Actual table, SDT Other table, NIT Actual table does not have relation of interdependence, in order to accelerate inbound pacing, can receive NIT Actual table, SDT Actual table and SDT Other table simultaneously.
Step 3: resolve NIT Actual table and SDT table.Resolve NIT Actual table and can obtain frequency point information all in current network, resolve SDT table and can obtain the essential information of all programs in current network, although do not comprise in these essential informations, program is play and the information of deciphering, but the information such as network ID, transport stream ID, traffic ID, frequency information, program name, program category, program provider have been comprised, for program, play front reception, parsing pat table, CAT table and pmt table necessary information parameter is provided, for user watches program, lay a good foundation.
Step 4: preserve frequency point information and programme information.By resolving all frequency point information and programme informations in the network that NIT Actual shows and SDT table obtains, be all stored in internal memory, when subsequent user is switched program, PMTPID, audio/video information, PCR control information, enciphered message that reception, parsing pat table, CAT table and pmt table obtain also can be preserved, and whole these have just formed all information of a program.
The audio/video information of digital television program, PCR control information, enciphered message etc. all leave in pmt table and CAT table, and the PID of pmt table can only obtain by receiving, resolve pat table.Because these programme informations change than very fast, top box of digital machine software is for these programme informations that can upgrade in time, conventionally all can before broadcast program, remove to receive, resolve pat table, CAT table and pmt table, to obtain and to use the up-to-date information of program to go to play and deciphering.Therefore,, in program searching process, pat table, CAT table and the pmt table that also will remove to receive, resolve each program just seem unnecessary.And because pat table, CAT table and pmt table data volume are considerably less, reception and parsing are very fast, substantially can not affect user and normally watch program.Thereby in the method for fast automatic searching programs proposed by the invention, do not search for pat table, pmt table and CAT table on other frequency, and greatly simplified traditional automatic search flow process, greatly shorten automatic search and saved object time.
Comprehensive the above, visible top box of digital machine software has adopted a kind of new automatic search method.When automatic search starts, first read and lock dominant frequency point, receive the NIT Actual table of dominant frequency point simultaneously, SDTActual table and SDT Other table, resolve NIT Actual and show to obtain all frequency point information in network, resolve SDT Actual table and SDT Other and show to obtain in network each program name under all frequencies, program category, the essential informations such as program provider, then according to program category by each program storage in corresponding digital TV channel and broadcast channel list, thereby complete whole automatic search process, this automatic search method has versatility, easy to implement and promote.
This automatic search method and conventional search methods difference are, it will be put into when user is switched program and go the reception of the program information table such as PAT, PMT, CAT under the tuning frequency locking of all frequencies in network and each frequency, thereby in automatic search process, saved this step, greatly reduced the time of automatic search.Meanwhile, top box of digital machine software, for these programme informations that can upgrade in time, all can remove to receive, resolve pat table, CAT table and pmt table conventionally before broadcast program, to obtain and to use the up-to-date information of program to go to play and deciphering.Therefore,, in program searching process, also there is no need under each frequency, to receive, resolve pat table, CAT table and the pmt table of each program.In addition, the program information table such as PAT, PMT and CAT are very little, and its reception, parsing and renewal are very fast, substantially can not affect normally watching of user.
The present invention do not change the data of front end based on traditional automatic search method broadcast configuration and do not increase under the prerequisite of top box of digital machine software extra process, by broadcasting SDT Other at front end dominant frequency point, show, simplified traditional automatic search flow process, greatly shorten automatic search and saved object time, improve the speed of automatic search, to digital cable customers, provide better experience.
Above the method for the fast automatic searching programs of a kind of top box of digital machine provided by the present invention has been carried out to detailed introduction, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, to change of the present invention and improvement, will be possible, and can not exceed design and the scope of accessory claim defined, in sum, this description should not be construed as limitation of the present invention.
Claims (6)
1. a method for the fast automatic searching programs of top box of digital machine, is characterized in that: method step is as follows,
Step 1, reads and locks dominant frequency point, and dominant frequency point presets, front end has been broadcast the needed significant data information of automatic search on dominant frequency point, wherein mainly comprise NIT Actual table and SDT table, described SDT table is service information list, comprises SDT Actual table and SDT Other table;
Step 2, the NIT Actual broadcasting at dominant frequency point receiving front-end table and SDT table;
Step 3, resolves NIT Actual table and SDT table, resolves NIT Actual table and can obtain frequency point information all in current network, resolves SDT table and can obtain the essential information of all programs in current network;
Step 4, preserve frequency point information and programme information, by resolving all frequency point information and programme informations in the network that NIT Actual shows and SDT table obtains, be all stored in internal memory, when subsequent user is switched program, PMTPID, audio/video information, PCR control information, enciphered message that reception, parsing pat table, CAT table and pmt table obtain also can be preserved.
2. the method for the fast automatic searching programs of a kind of top box of digital machine according to claim 1, it is characterized in that: NIT Actual table is current network information table, comprised frequency point information all in current network, comprising network ID, transport stream ID and the modulation intelligence of each frequency.
3. the method for the fast automatic searching programs of a kind of top box of digital machine according to claim 1, is characterized in that: the business information that described SDT Actual table has comprised current frequency, the business information that described SDT Other table has comprised non-current frequency.
4. the method for the fast automatic searching programs of a kind of top box of digital machine according to claim 1, it is characterized in that: in step 3, by receiving, resolve SDT table, just can obtain the essential information of all programs in current network, comprise network ID, transport stream ID, traffic ID, frequency information, program name, program category, program provider, but do not comprise, program is play and the information of deciphering.
5. the method for the fast automatic searching programs of a kind of top box of digital machine according to claim 1 is characterized in that: in step 2, can receive NIT Actual table, SDT Actual table and SDT Other table at dominant frequency point simultaneously.
6. the method for the fast automatic searching programs of a kind of top box of digital machine according to claim 1, is characterized in that: described SDT Other internal information of statement is that front end system generates automatically, and its programme information comprising is synchronizeed with the programme information of front-end configuration.
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| CN104079992A (en) * | 2014-07-11 | 2014-10-01 | 四川金网通电子科技有限公司 | Non-local program shielding method based on wireless set top box |
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| CN105142016A (en) * | 2015-08-12 | 2015-12-09 | 湖南兆华世纪新媒体技术有限公司 | Method for setting centre frequency of terminal in terrestrial digital television multi-frequency network |
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| CN110149547A (en) * | 2019-05-27 | 2019-08-20 | 四川九州电子科技股份有限公司 | A kind of system and method for fast automatic search of satellite program |
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| CN110149547A (en) * | 2019-05-27 | 2019-08-20 | 四川九州电子科技股份有限公司 | A kind of system and method for fast automatic search of satellite program |
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Application publication date: 20140219 |