CN1625240A - Method of quick searching program by receiving terminal of digital TV system - Google Patents
Method of quick searching program by receiving terminal of digital TV system Download PDFInfo
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- CN1625240A CN1625240A CN 200310116954 CN200310116954A CN1625240A CN 1625240 A CN1625240 A CN 1625240A CN 200310116954 CN200310116954 CN 200310116954 CN 200310116954 A CN200310116954 A CN 200310116954A CN 1625240 A CN1625240 A CN 1625240A
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Abstract
The invention discloses a rapidly program searching method of the receiving end of a digital TV system, including: obtaining configuration information of network channels and according to the information, searching the programs. Its direct effect is completing the searching for the programs at all usable frequencies in the shortest time in all searching modes on the condition of reducing user input times, thus the searching time shorter, the searched result more reliable and the searching efficiency higher.
Description
Technical field
The present invention relates to a kind of program searching method, the method for the quick program searching of especially a kind of digital television system receiving terminal; Belong to the digital video technology field.
Background technology
In the existing technology, the search of program generally is to be undertaken by the mode that dedicated tunnel is carried out program searching.Single pass operation generally will be provided with four parameter frequencies, symbol rate, modulation system and frequency spectrums and be inverted, and the user can very fast finishing; When a plurality of passages existed, it is very loaded down with trivial details that user's operation seems.Such as, when needs carried out the operation of 5 passages, the theoretical operation number of times that needs was 4 * 5=20 time, brought unnecessary trouble for like this user's operation.
Another searching method is, in advance with the channel information that might occur is prefabricated searches for one by one in program.The user only need operate the search that once can realize program like this.But such operation has the another one problem, and promptly search efficiency is lower, and the time is long.Such as, 5 passages include the program of needs search, still, must all need to search for to existing 96 passages, that is to say that efficient is 5/96=5.2%; And another more fatal problem that such way of search exists is to suppose that all modulation systems all are identical.Modulation system has 16QAM, 32QAM, 64QAM, 128QAM and 5 kinds of modes of 256QAM now, supposes that a channel parameters is provided with under the normal situation, and searching for needed for 2 seconds, and so best situation needs 96 * 2=192s to be roughly equal to clock more than 3 minutes.Worst condition needs 96 * 2 * 5=960s to be roughly equal to 16 minutes.The user is difficult to stand in operation.
If a kind of mode can be arranged, can implement to search for rapidly and accurately, save the time and the operation steps of user of carrying out program searching, will be subjected to users' welcome.
Summary of the invention
Technical problem to be solved by this invention is to provide the method for the quick program searching of a kind of digital television system receiving terminal, according to the standard-required structure about business information of Digital Television, can finish the automatic reception of program fast, reduces user's operation.
Method of the present invention comprises the steps:
Step 1, beginning program searching obtain the benchmark passage;
The nit table of step 2, parsing benchmark passage obtains the network channel configuration information;
Step 3, according to channel configuration information, to each passage, carry out the search of program;
Step 4, the program that searches is write the rendition list, finish program searching.
Employing obtain manner network channel configuration information mode of the present invention is carried out autotelic program searching, in all ways of search, reducing the user imports under the situation of number of times, the search of the program of all available frequencies in finishing network in the shortest time, search time is shorter, Search Results is more reliable, search efficiency is higher.
Description of drawings
Fig. 1 is the flow chart of the quick program searching method of digital television system receiving terminal of the present invention;
Fig. 2 is that the present invention obtains programme information according to the nit table, is filled into the flow chart of listing.
Embodiment
According to the standard of digital television business information, resolve by data the network information table nit (network information table) of benchmark passage, can obtain whole network of network state.Because on each passage of Digital Television a plurality of programs can be arranged, the pairing frequency of each passage is unique; Therefore, for network state information, what program searching was concerned about mainly is channel configuration information, i.e. frequency point information comprises frequency, symbol rate, modulation system, the frequency spectrum information that is inverted.
According to these information, carry out the search of program for each passage, promptly search for sdt table (servicedescription table), pat table (program association table), pmt and show (programmap table) information, just can obtain the programme information (audio/video information, programm name information) of necessity.Owing to only the passage that comprises programme information is searched for, can shorten the time of program searching greatly, finish purpose of the present invention, therefore, the configuration information that focuses on obtaining accurately passage of the present invention.
Method of the present invention as shown in Figure 1, comprises the steps:
Step 1, beginning program searching obtain the benchmark passage;
The nit table of step 2, parsing benchmark passage obtains the network channel configuration information;
Step 3, according to channel configuration information, to each passage, carry out the search of program, the program that searches is write the rendition list;
Step 4, obtain the tabulation of all programs, finish program searching.
Adopt program searching method of the present invention, do not need all possible passage is searched for one by one, after obtaining channel configuration information, possible passage and channel configuration information in just can awareness network, thereby got rid of most passage in the hunting zone,, obtained audio/video information, programm name information again by each passage is carried out program searching, the program that searches is write the rendition list, finish the search procedure of program.
The present invention shows to obtain the network channel configuration information by the nit of a benchmark passage, for digital television system, so-called benchmark passage is exactly the passage that includes the whole network information table, that is to say the state of the embodiment network that the content of the network information table that comprises in certain passage can be complete, then this passage just can be used as the benchmark passage.If the network information table that does not comprise network information table in the common passage or comprise is imperfect.
Digital television system can be divided into two kinds of single channel and multichannels.In the single channel system, have only a passage to can be used as the benchmark passage, network channel configuration information on the benchmark passage is the description of whole network configuration information, promptly should comprise the correct description (comprising frequency, symbol rate, modulation system) of all channel informations in the present networks; In the multi-channel system, each passage all is the benchmark passage, and their nit epiphase all comprises whole network information together.For existing digital television system, because network is also lack of standardization, comprise whole network information so may have a plurality of passages, but not all passage all comprises the situation of whole network information, the inventive method is all considered these several situations when design.
In the step 1 of the present invention, the method of obtaining the benchmark passage mainly contains three kinds of approach, the one, the user is by the manager of digital TV network, understand the configuration information of correct benchmark passage, start the directly configuration information of input reference passage of search back, that is: can obtain the information of the passage of correct channel arrangement by the direct input of user, comprising frequency, symbol rate and modulation system information, by directly on this passage, searching for the nit table, obtain network configuration information.
The 2nd, import a conduct with reference to passage by the user, determine the benchmark passage based on this, this kind mode is determined a channel information by the user, i.e. incoming frequency, symbol rate, modulation system information, search nit table on this passage is so that obtain network configuration information; If the search less than, promptly upwards or downwards (can determine or determine), in the frequency meter scope of state specified standards, travel through whole network by the digital television receiver designer by user's input or other modes, up to determining the benchmark passage, obtain till the network configuration information; Represented possible passage with X among Fig. 1,, set X=0 from some passages; Whenever change a passage X and add 1,, then finish whole ergodic process when X equals possibility number of active lanes in the network.Certainly may have the situation that does not have the benchmark passage, meaning does not have programme signal yet, as shown in Figure 1, directly withdraws from search utility; This possibility is little, because if there is not programme signal, other parts (as demodulator) of Digital Television can provide information, and the user just can not carry out program searching yet.
It should be noted that this kind mode requires in the network configuration information on each passage that carries network configuration information in full accord, and these passages must be the some passages that meet in the frequency meter scope of state specified standards.This requirement belong to a base attribute, and passage must be to meet the principle that national regulation must be observed especially according to the classification of foregoing digital television system.Modulation system is the modulation system of user's input, and this is because modulation system is a basic feature of network, should inform the user by Network Management person.
The 3rd, directly the whole network of traversal is determined the benchmark passage, promptly in the frequency meter scope of state specified standards, determine a passage automatically, the search network configuration information, if the search less than, (determine or user's input or other modes are determined) promptly upwards or downwards, in the frequency meter scope of state specified standards, travel through whole network by the digital television receiver designer, up to determining the benchmark passage, obtain till the network configuration information.It should be noted that this kind mode requires in the network configuration information on each passage that carries network configuration information in full accord, and these passages must be the some passages that meet in the frequency meter scope of state specified standards.Modulation system is the modulation system of user's input.
The inventive method if adopt mode in the second or the 3rd, also may need to travel through whole network when obtaining the benchmark passage, but owing to only carry out the nit search of each passage, the time that needs is very short, can very fast the carrying out of speed, can't influence the speed of whole program searching.
Obtain after the benchmark passage,, just can obtain the channel configuration information of whole network by resolving the nit table.So-called parsing nit table is read the network channel information that needs exactly from the nit table, comprise the frequency of the passage of each passage, and symbol rate and modulation system information form a tabulation, is convenient to later search step and uses.
As shown in Figure 2, after getting access to network configuration information, by the passage that obtains is traveled through, obtain the programme information of each passage in the network configuration information table, be filled in the listing and go, finish the program searching process, step 3 of the present invention comprises:
At first, according to the channel information that obtains, initial passage is carried out demodulation; The demodulation of passage mainly should comprise 4 parameters, it is frequency, symbol rate, modulation system, the frequency spectrum parameter that is inverted, first three parameter can obtain by network configuration information, it is unavailable having only the frequency spectrum parameter that is inverted, therefore carry out earlier frequency, symbol rate and modulation system need being set in the process of demodulation, frequency spectrum is inverted and can be set to the search that positive carries out sdt table, pat table and pmt table, if search is set to anti-phasely search for less than, the parameter that also will frequency spectrum be inverted again.Certainly also may occur, still search for less than situation, that is to say network information mistake, but this possibility is very little, if this occurs, just skip this passage, directly carry out the demodulation of next passage.
Then, carry out the search of programme information on the passage of demodulation success, this comprises that mainly searching for the sdt table (program description), pat table (program-related information), the pmt that comprise programme information shows (program map information).After searching sdt table, pat table, pmt table, resolve sdt table, pat table and pmt table, can know the information of each program, comprise programm name, the pid of needed Voice ﹠ Video of digital decoder and synchronizing information, according to this information, program is write the rendition list, just can realize that the selection of this program is watched.Represented all frequency points with N among Fig. 2, m has represented the frequency of current search, and m has finished the ergodic process of whole passage from 1 to N circulation.
Programme information can carry out according to following rule to the filling of the rendition list:
At first, determine whether to receive dissimilar programs according to the service_type in the sdt table.
Then, according to the order of the channel information in the network configuration table program order is sorted, or carry out self-defined ordering, or carry out self-defined ordering or other according to service_id according to frequency, symbol rate, modulation system etc.
Optimum mode be according to the channel information medium frequency from low to high or mode from high to low sort, and then according to the order of program number under the same frequency in the programme information from low to high or mode from high to low sort.
Guarantee that same frequency sorts according to a direction, can guarantee to switch continuously when passage need switch in the program switching that channel difference is little, improves the probability of demodulation success, thereby improves the probability of program handover success; The program that guarantees same frequency puts together, and can reduce the number of times that passage switches in the program switching, improves the probability of program handover success.
After the program searching data owner of the program of storage to comprise that place channel frequence, symbol rate, modulation system, frequency spectrum are inverted, the pid of the channel type of program number, program indexing number, program category, program, video pid, audio frequency pid, ecm pid (pid of the scramble information of TS level), video ecm pid (pid of the video scrambling information of PES level), audio frequency ecm pid (pid of the video scrambling information of PES level), scrambling type, clock synchronization information.Whether whether the attribute information of all right more self-defined programs of user as liking program, locking or the like.These programme informations mainly are to be used for the information that process that program switches (changing platform) is used.
Below by a concrete example, provide a kind of listing organization definition:
Use the describing mode of C language:
Typedef struct ProgramTypeDef { short IndexNo; // program indexing short ScrambleFlag; // scrambling sign char Name[24]; // programm name short Frequency; // frequency short Symbol_rate; // symbol rate short QamSize; // modulation system short SpectrumInvers; // frequency spectrum short the ServiceID that is inverted; // program number short VideoPID; // video pid short AudioPID; // audio frequency pid short PcrPID; // clock synchronization short ScrambleType; // scrambling type short EcmPID; // (the TS level scrambling) ecm pid short VideoEcmPID; // (PES level video scrambling) ecm pid short AudioEcmPID; // (PES level audio scrambling) ecm pid char FavoriteFlag; // hobby program sign char Type // program category char Lock // program locks and indicates char AudioType // channel type } ProgramTable;
After finishing filling, the program searching of a passage has just been finished; Each passage of all passages in the channel configuration information is all finished program searching, obtain comprising the tabulation of all programs, just finished the whole program search procedure.
It should be noted last that: 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 (9)
1, the method for the quick program searching of a kind of digital television system receiving terminal is characterized in that: comprise the steps:
Step 1, beginning program searching obtain the benchmark channel information;
The nit table of step 2, parsing benchmark passage obtains the network channel configuration information;
Step 3, according to channel configuration information, to each passage, carry out the search of program, the program that searches is write the rendition list;
Step 4, obtain the tabulation of all programs, finish program searching.
2, the method for the quick program searching of digital television system receiving terminal according to claim 1 is characterized in that: the benchmark passage in the described step 1 is the passage of nit table of the correct description of the frequency, symbol rate and the modulation system information that comprise all passages in the present networks.
3, the method for the quick program searching of digital television system receiving terminal according to claim 1 and 2, it is characterized in that: in the described step 1, can obtain the benchmark channel information in the following way:, obtain the benchmark passage by the direct input reference channel frequence of user, symbol rate and modulation system information.
4, the method for the quick program searching of digital television system receiving terminal according to claim 1 and 2, it is characterized in that: in the described step 1, can obtain the benchmark passage in the following way: the reference data channel frequence of user's input channel, symbol rate and modulation system information, search nit table on this passage; If the search less than, be starting point then with the reference data passage, in the frequency meter scope of state specified standards, travel through whole network up or down, determine the benchmark passage.
5, the method for the quick program searching of digital television system receiving terminal according to claim 1 and 2, it is characterized in that: in the described step 1, can obtain the benchmark passage in the following way: directly in the frequency meter scope of state specified standards, travel through all passages, search nit table is determined the benchmark passage.
6, the method for the quick program searching of digital television system receiving terminal according to claim 1, it is characterized in that: in the described step 2, resolve the nit table of benchmark passage, be specially: from the nit table, read the network channel information that needs, the frequency that comprises the passage of each passage, symbol rate and modulation system information.
7, the method for the quick program searching of digital television system receiving terminal according to claim 1, it is characterized in that: described step 3 comprises:
The channel information that step 3.1, basis are obtained carries out demodulation;
If the search of programme information is carried out in step 3.2 demodulation success on the passage of demodulation success; Otherwise, execution in step 3.6;
Step 3.3, parsing comprise sdt table, pat table and the pmt table of programme information.
If step 3.4 is resolved pat, pmt success, then the programme information that obtains is filled in the listing, otherwise, execution in step 3.6;
If step 3.5 sdt resolves successfully, then fill correct programm name, if resolve failure, then fill a constant mark, be used for showing the title that does not obtain this program;
Step 3.6, judge whether to finish search, if do not finish, then next passage is carried out demodulation, execution in step 3.1 whole passages; Otherwise, end step three.
8, the method for the quick program searching of digital television system receiving terminal according to claim 7 is characterized in that: program is filled in the listing, is undertaken by following rule:
Determine whether to receive dissimilar programs according to the service_type in the sdt table, in order the program order is sorted according to the channel information in the network configuration table, or carry out self-defined ordering, or carry out self-defined ordering according to service_id according to frequency, symbol rate, modulation system etc.
9, the method for the quick program searching of digital television system receiving terminal according to claim 8, it is characterized in that: optimum sortord be earlier according to the channel information medium frequency from low to high or mode from high to low sort, and then according under the same frequency in the programme information, the order of program number from low to high or mode from high to low sort.
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| CN 200310116954 CN1625240A (en) | 2003-12-03 | 2003-12-03 | Method of quick searching program by receiving terminal of digital TV system |
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| CN 200310116954 CN1625240A (en) | 2003-12-03 | 2003-12-03 | Method of quick searching program by receiving terminal of digital TV system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202917B (en) * | 2006-12-28 | 2010-05-12 | 深圳市同洲电子股份有限公司 | Method and system for searching TV program |
| CN101287127B (en) * | 2008-02-26 | 2010-06-02 | 四川金网通电子科技有限公司 | Terrestrial digital television system |
| CN101415086B (en) * | 2008-11-27 | 2011-05-25 | 中兴通讯股份有限公司 | Method and apparatus for rapidly searching television program information |
| CN101212607B (en) * | 2006-12-31 | 2011-08-10 | 康佳集团股份有限公司 | Automatic channel search method for TV set |
| CN101568011B (en) * | 2008-04-24 | 2012-04-04 | 乐金电子(中国)研究开发中心有限公司 | Method and device for rapidly searching unencrypted service of digital television |
| CN102413365A (en) * | 2010-09-24 | 2012-04-11 | 鸿富锦精密工业（深圳）有限公司 | Set top box and character search method thereof |
| CN101594526B (en) * | 2008-05-30 | 2012-07-04 | 乐金电子(中国)研究开发中心有限公司 | Searching method of network information table in digital TV set and digital TV set |
| CN101656842B (en) * | 2008-08-22 | 2012-09-05 | 深圳Tcl新技术有限公司 | Single frequency point quick channel search method of digital television |
| CN102045521B (en) * | 2009-10-16 | 2013-05-08 | 深圳Tcl新技术有限公司 | Digital television channel searching method and digital television employing same |
| CN103647983A (en) * | 2013-12-30 | 2014-03-19 | 深圳Tcl新技术有限公司 | Channel searching method and channel searching system of digital television |
| CN108235061A (en) * | 2018-03-02 | 2018-06-29 | 深圳创维数字技术有限公司 | Dominant frequency point update method, device, terminal and computer-readable medium |
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2003
- 2003-12-03 CN CN 200310116954 patent/CN1625240A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202917B (en) * | 2006-12-28 | 2010-05-12 | 深圳市同洲电子股份有限公司 | Method and system for searching TV program |
| CN101212607B (en) * | 2006-12-31 | 2011-08-10 | 康佳集团股份有限公司 | Automatic channel search method for TV set |
| CN101287127B (en) * | 2008-02-26 | 2010-06-02 | 四川金网通电子科技有限公司 | Terrestrial digital television system |
| CN101568011B (en) * | 2008-04-24 | 2012-04-04 | 乐金电子(中国)研究开发中心有限公司 | Method and device for rapidly searching unencrypted service of digital television |
| CN101594526B (en) * | 2008-05-30 | 2012-07-04 | 乐金电子(中国)研究开发中心有限公司 | Searching method of network information table in digital TV set and digital TV set |
| CN101656842B (en) * | 2008-08-22 | 2012-09-05 | 深圳Tcl新技术有限公司 | Single frequency point quick channel search method of digital television |
| CN101415086B (en) * | 2008-11-27 | 2011-05-25 | 中兴通讯股份有限公司 | Method and apparatus for rapidly searching television program information |
| CN102045521B (en) * | 2009-10-16 | 2013-05-08 | 深圳Tcl新技术有限公司 | Digital television channel searching method and digital television employing same |
| CN102413365A (en) * | 2010-09-24 | 2012-04-11 | 鸿富锦精密工业（深圳）有限公司 | Set top box and character search method thereof |
| CN103647983A (en) * | 2013-12-30 | 2014-03-19 | 深圳Tcl新技术有限公司 | Channel searching method and channel searching system of digital television |
| CN103647983B (en) * | 2013-12-30 | 2018-04-27 | 深圳Tcl新技术有限公司 | A kind of DTV channel search method and system |
| CN108235061A (en) * | 2018-03-02 | 2018-06-29 | 深圳创维数字技术有限公司 | Dominant frequency point update method, device, terminal and computer-readable medium |
| CN108235061B (en) * | 2018-03-02 | 2020-09-15 | 深圳创维数字技术有限公司 | Main frequency point updating method, device, terminal and computer readable medium |
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