CN101568011B

CN101568011B - Method and device for rapidly searching unencrypted service of digital television

Info

Publication number: CN101568011B
Application number: CN2008101049240A
Authority: CN
Inventors: 洪亮
Original assignee: LG Electronics China Research and Development Center Co Ltd
Current assignee: LG Electronics China Research and Development Center Co Ltd
Priority date: 2008-04-24
Filing date: 2008-04-24
Publication date: 2012-04-04
Anticipated expiration: 2028-04-24
Also published as: CN101568011A

Abstract

The invention provides a method and a device for rapidly searching unencrypted service of a digital television. In order to solve the problem that the prior digital television cannot rapidly search out the unencrypted service which a user wishes to obtain, the invention provides the method for rapidly searching the unencrypted service of the digital television, and the method comprises the following steps that: service information of a current network frequency dot is received and analyzed; according to the only matching of a network information table and a service description table of the service information, an unencrypted service list of the whole network is obtained; and according to the unencrypted service list of the whole network, the unencrypted service is searched out. The method has the advantages that the method can rapidly search out the unencrypted service which the user can watch; final results listed in a screen list can be totally watched; and the user does not need to debug one by one so as to save the time for the user to search programs of the digital television.

Description

A kind of method and device of quick search DTV unencrypted service

Technical field

The present invention relates to digital TV field, is a kind of method and device of quick search DTV unencrypted service specifically.

Background technology

By the end of the year 2000,3.26 hundred million of national television set owning amounts, the TV population coverage is more than 90%.Through 1,300 of the cable TV station of SARFT(The State Administration of Radio and Television) approval, more than 4,000 of all kinds of cable television systems, 943 of local tv stations.Cable TV network mileage length overall surpasses 3,000,000 kilometers, 300,000 kilometers of optical networkings, nearly 2,000 counties build cable TV network, wherein more than 600 county realized optical cable to the small towns, the rural area.The cable TV subscriber has surpassed 100,000,000, and with the speed increment at annual 5000000 families, cable TV subscriber's number has occupied the first in the world, and hfc plant (hybrid network that optical fiber and coaxial cable combine), satellite television network are becoming the main flow of development.

Encrypt the essential method become many digital TV networks operator profit to digital television service; Chinese patent publication number CN1140378A for example; Disclose a kind of cable TV signal scrambling and decryption method, utilized IC-card and decipher to realize deciphering TV programme.

Similarly prior art has a lot; Chinese patent notification number CN2497499Y for example again; Disclose a kind of non-mode TV frequently and added the descrambling line concentration controller, the mode that adopts " suppressing synchronously " realizes collecting according to encryption the purpose of TV program watching expense to the television image scrambling.

Existing digital TV network also adopts the mode of similar above-mentioned prior art that TV programme are carried out encryption and decryption; Generally include the program making end; Can send the digital television signal packet to heterogeneous networks, said TV signal data bag meets relevant criterion, and audio frequency and video compressed format meets relevant criterion; SI in the said packet (Service Information) packets of information includes network information table (NIT:NetworkInformation Table); Service describing table (SDT:Service Description Table), Event Information Table (EIT:Event Information Table), time and tables of data tables such as (TDT:Timeand Data Table).Wherein the effect of NIT mainly is the identification to multiple path transmission flow, and NIT provides multiple path transmission flow, some relevant information of physical network and Network Transmission, as be used for tuning frequency information and coded system.The information of parameter aspects such as modulation system.Can carry out the switching between the multiple path transmission flow according to this information setting IRD (Integrated Receiver Decoder).SDT is used for the title of each road service of descriptive system, this service providers, and whether this service encrypts; The information whether aspects such as corresponding time description list are arranged; This table can be described current MPTS, also can describe other MPTS, and this is distinguished by TableID.EIT representes that it provides the title of incident, time started, time span, running status etc. to the description of the incident of a certain road service.The TDT table provides current information of time, this table to be used for the decode clock of IRD (Integrated Receiver Decoder) is upgraded.

SI information of the prior art has one or more in following three kinds of contents at least: possess the SI information of overall network (for example terrestrial broadcasting and wired system) at a certain frequency, and indicate through the information descriptor among the NIT; A certain frequency in heterogeneous networks comprises the information of the whole services menus of present networks (EPG:Electric Program Guide), and indicates through the information descriptor among the NIT; Each frequency all possesses whole electric program menus (EPG:Electronic Program Guide) information of present networks in heterogeneous networks.The user only needs to use set-top box remote controller that video screen is switched to the EPG interface when searching service, just can see the information such as service name, broadcast time and brief introduction of service of each digital television service within a period of time.

Existing digital TV network also comprises receiver end; Can receive the heterogeneous networks or the digital television signal of single network at least; And said signal decoded, possess the SI information of filtration and analyzing stored, can judge self whether to possess conditional access system (CA:Condition Access); Obtain the relevant information of self CA descrambling system, and can discern the relevant information of current network CA system.

And the problems of the prior art are; When the user turns on TV and carries out service search; Because TV service quantity causes search time very long too much; Particularly a lot of frequencies of encrypting still will be searched for one by one when the user connects digital TV network and carries out service search; If the user is during the mandate of this cryptographic services, though may not demonstrate the TV service of this frequency on the screen, the information that the service search unit still can go each frequency point searching one by one and in the service list that the user can see, demonstrate these cryptographic services supplies the user to select; So cause waste a lot of quality time of user, and listed a large amount of service lists that can't watch for the user.

Chinese patent publication number CN1868206A; Disclose and a kind ofly descrambling data has been carried out pretreated scheme in order to reduce the service change time; This scheme adopts the mode of storing descramble key in advance to shorten the descrambling time, thereby has shortened the descrambling time that need before using, utilize encryption key to decode.But this scheme can not change the time of service search.

With the introducing mode above-mentioned technology contents is incorporated in the application.

Summary of the invention

The object of the present invention is to provide a kind of method of quick search DTV unencrypted service, it is slow to have solved in the prior art service retrieval rate, and encrypting under the situation about all existing with unencrypted service, searches for unencrypted service fast.

Another object of the present invention is to provide a kind of device of quick search DTV unencrypted service, solved and to have realized in the prior art that STB is inconvenient to the unencrypted service search, the slow deficiency of search speed.

To achieve these goals, the embodiment of the invention provides a kind of method of quick search DTV unencrypted service, it is characterized in that this method comprises,

Receive and analyze the information on services of current network frequency, only mate with the service description list according to the network information table in the said information on services and draw the tabulation of whole network unencrypted service, according to the said unencrypted service of said whole network unencrypted service list search.

A further aspect according to a kind of quick search DTV unencrypted service method of the present invention; When the service-information step of said reception and analysis current network frequency; Also comprise and judge whether to have the descrambling function that is directed to said current network; If have then carry out digital television service search step of the prior art, draw whole network unencrypted service listings step otherwise get into only to mate with the service description list according to the network information table in the said information on services.

Another further aspect according to a kind of quick search DTV unencrypted service method of the present invention; Carry out said according to the network information table in the said information on services with the service description list only mate draw whole network unencrypted service listings step before; Also comprise and judge whether the current network frequency has whole network service describing table information; If have said whole network service describing table information; Then only mate with the service description list and draw whole network unencrypted service tabulation, otherwise withdraw from and point out the user according to the network information table in the said information on services.

Another further aspect according to a kind of quick search DTV unencrypted service method of the present invention; Before judging whether the current network frequency has whole network service describing table information; Also comprise and judge whether current frequency has the information of pointing to the frequency with whole network information on services; If have then obtain the said whole network information on services of this frequency; And judge whether this frequency has whole network service describing table information, otherwise judge at current frequency whether this frequency has whole network service describing table information.

Another further aspect according to a kind of quick search DTV unencrypted service method of the present invention; Said only the coupling according to network information table in the information on services and service description list, draw whole network unencrypted service tabulation and comprise; From network information table, extract primitive network ID, MPTS ID, frequency point parameters formation table 1 at least; From the service describing table, extract primitive network ID, MPTS ID, service ID formation table 2 at least; Mate primitive network ID and MPTS ID in said table 1 and the table 2, obtain said whole network unencrypted service tabulation.

According to another further aspect of a kind of quick search DTV unencrypted service method of the present invention, said whole network unencrypted service tabulation comprises primitive network ID, MPTS ID, frequency point parameters, service ID at least.

Another further aspect according to a kind of quick search DTV unencrypted service method of the present invention; Comprise in said step according to the said unencrypted service of whole network unencrypted service list search; This frequency information on services of frequency point information retrieval according in the said whole network unencrypted service tabulation obtains frequency point parameters, service ID, service name, service provider, video PID, audio frequency PID, electronic service menu information.

To achieve these goals; The embodiment of the invention also provides a kind of device of quick search unencrypted service; This device comprises receiving element, processor, memory, search unit, and said processor is connected with said receiving element, memory, search unit respectively;

Said receiving element is used to receive the information on services of current network frequency;

Said processor is used to analyze said information on services, only mate with the service description list according to the network information table in the said information on services to draw whole network unencrypted service tabulation, and with said whole network unencrypted service list storage in said memory;

Search unit is used under the control of said processor, according to the said unencrypted service of said whole network unencrypted service list search.

A further aspect according to a kind of quick search DTV unencrypted service device of the present invention; Said processor also comprises analysis module, descrambling judge module, extraction module, matching module; Said descrambling judge module, extraction module are connected with said analysis module respectively, and said matching module is connected with said extraction module;

Said analysis module is used to analyze the current network information on services, obtains the information of network information table and service description list;

Said descrambling judge module is used to judge whether the current network information on services exists and the corresponding descrambling function of current network, if exist then notify said analysis module to stop subsequent operation;

Said extraction module is used for extracting the information of network information table and service description list, sends said extraction result to said matching module;

Said matching module is used for drawing the tabulation of whole network unencrypted service according to said extraction result coupling.

The beneficial effect of the embodiment of the invention is; Can search out the unencrypted service that the user can watch fast; And the final result of on screen list, listing all can be watched, and the user need not to debug one by one, has saved the time of user search digital television service.

Description of drawings

Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute qualification of the present invention.In the accompanying drawings:

Fig. 1 is the inventive method flow chart;

Fig. 2 is the preferred embodiment flow chart of Fig. 1 step 101 of the present invention;

Fig. 3 is the preferred embodiment flow chart of Fig. 1 step 103 of the present invention;

Fig. 4 is the preferred embodiment flow chart of Fig. 1 step 104 of the present invention;

Fig. 5 is a precise search process preferred embodiment flow chart of the present invention;

Fig. 6 is apparatus of the present invention structure charts;

Fig. 7 is the detailed structure view of Fig. 6 processor of the present invention.

Embodiment

For making the object of the invention, technical scheme and advantage clearer,, the present invention is explained further details below in conjunction with execution mode and accompanying drawing.At this, exemplary embodiment of the present invention and explanation thereof are used to explain the present invention, but not as to qualification of the present invention.

The embodiment of the invention provides a kind of method and device of quick search unencrypted service.Below in conjunction with accompanying drawing the present invention is elaborated.

Be illustrated in figure 1 as the present invention and realize searching for fast the unencrypted service method flow diagram,

Step 101 is carried out effective service search according to user input, and the user selects to want search network like cable network or terrestrial broadcast networks or whole available network; Search available frequency; Locked frequency point, the NIT information of reception frequency analyzes in the current network whether whole network EPG or overall network SI information are arranged.

Step 102; Whether the current main frame of the automatic analysis of the processing unit in the main frame simultaneously possesses CA descrambling function; If possess then continue to judge whether system matches with current network CA; The CA descrambling system does not exist or gets into step 103 when unavailable in current machine, otherwise gets into CA descrambling step of the prior art.

Step 103; Judge whether current frequency has whole network SDT information,, then generate first table of comparisons that comprises frequency point parameters information, primitive network ID, MPTS ID and (be called for short: table 1) according to said NIT data if whole network SDT information is arranged; And get into step 104, otherwise get into step 107.

Step 104; Receive all SDT of current frequency and SDT (Other) information; Describe to judge whether this service encrypts according to the free_ca_mode to each service among the SDT, according to the information among the SDT, with having or not enciphered digital TV service ID and corresponding primitive network ID thereof in whole network of describing in the current frequency or the present networks; MPTS ID and relevant information form the second tabulation (abbreviation: table 2) be stored in the memory like service name and service provider.This table 2 comprises all the TV service SDT information on whole frequencies.

Step 105 is directed to the primitive network ID of no cryptographic services in the table 2 or the analog value in the MPTS ID matching list 1, to obtain information such as frequency and service ID.

Step 106; The service search unit can be searched for the frequency of coupling according to parameters such as primitive network ID, MPTS ID, frequency and service ID one by one; Final all unencrypted digital television service that obtain; Can search out the no cryptographic services of each frequency so more accurately; Also significantly reduce simultaneously receiver scanning cryptographic services and do not had time of service frequency, and because frequency point parameters is known in NIT information, also reduced receiver scans judgement to a certain frequency intrinsic parameter (like single carrier, multicarrier, QAM parameter etc.) process.

Step 107 shows the function that can not support of the present invention search unencrypted service on screen.

Be illustrated in figure 2 as the preferred embodiment flow chart of Fig. 1 step 101 of the present invention, step 201, user's select target network, for example user-selected number word cable TV network.

Step 202 detects this STB and whether has available frequency point information,, judges whether it is to carry out service search for the first time that is, if this STB has been stored frequency point information, then gets into step 203, otherwise gets into step 204.

Step 203 jumps to certain frequency of having stored, and gets into step 205.

Step 204 if said STB is not stored frequency point information, then begins a new search step, begins search from first service of selected network.

Step 205 judges whether this frequency has available signal, and promptly whether this frequency has digital television signal, if there is available signal to get into step 206, otherwise gets into step 207.

Step 206, preparation receives the SI information of this frequency.

Step 207 judges whether this frequency has been last in a present networks frequency, if then get into step 208, otherwise gets into step 209.

Step 208 does not find effective service, and again whether the prompting user search, perhaps withdraws from.

Step 209 is searched for next frequency.

Step 210 withdraws from service search.

Be illustrated in figure 3 as the preferred embodiment flow chart of Fig. 1 step 103 of the present invention, step 301 receives NIT data and composition table 1 and is stored in the memory.

Step 302 judges whether the current network frequency has whole network SI information, if having then carry out step 303, if do not have whole network SI information then in this frequency, carry out step 304.

Step 303 jumps to corresponding frequency with whole network SI information through the frequency information among the NIT.

Step 304 receives the whole SDT information of current frequency.

Step 305; Whether the SDT that judges this frequency has comprised (comprising SDT others) service description informations such as the programm name, program category of all MPTSs of whole network (in the multiplexed TS stream each independently the information of program); If comprised the service description information of whole network then carry out Fig. 1 step 104, otherwise get into block diagram 1 step 107.

Be illustrated in figure 4 as the preferred embodiment flow chart of Fig. 1 step 104 of the present invention, wherein dotted line representes that data call in/access, and the accompanying drawing of back is described in the same way.

Step 401, the service of searching each free_ca_mode=0 in the SDT table, promptly this is served and is the unencryption type.

Step 402 according to above-mentioned lookup result, is formed table 2 with the unencrypted record, and said table 2 comprises information such as primitive network ID, MPTS ID, service ID, service name, service provider.

Step 403 according to table 1 and table 2, is found out the unencrypted service tabulation.As preferably, can also find out unencrypted service place frequency point information so that carry out precise search.

Step 404, whether judges will carry out precise search, if carry out precise search then get into step 406, otherwise gets into step 405.

Step 405 is listed the unencrypted service tabulation, comprises frequency point parameters, service ID, service name, service provider etc., so that the user selects to want the service of redirect from tabulation.

Step 406 is listed as the cryptographic services tabulation, includes only frequency point parameters, and gets into corresponding precise search process.

Be illustrated in figure 5 as precise search process preferred embodiment flow chart of the present invention, step 501, tabulation obtains a certain frequency point data according to unencrypted service.

Step 502, the control receiving element jumps on the said frequency and receives data.

Step 503 receives PSI/SI information, analyzes the service that wherein can watch, obtains the unencrypted service tabulation, and this unencrypted service tabulation comprises frequency point parameters, service ID, service name, service provider, video PID, audio frequency PID, service guide information.This step is used for verifying once more whether the service on this frequency can normally receive.

Step 504 judges whether to arrive last frequency, if arrive last frequency then get into step 505, otherwise gets into step 501.

Step 505 is presented at said unencrypted service tabulation on the screen, supplies the user to select to hope the service of redirect.

Wherein, said service is can be in the many covers TV service under the identical frequency, and for example, one in central authorities, two in central authorities, three in central authorities are in same frequency, but are divided into three services.

Be illustrated in figure 6 as the apparatus structure sketch map that the present invention searches for unencrypted service fast, comprise receiving element 601, processor 602, memory 603, search unit 604.Said receiving element 601, memory 603, search unit 605 are connected with said processor 602 respectively.

Said receiving element 601 is used to receive the information on services of current network frequency.

Said processor 602 is used to analyze said information on services, finds out primitive network ID, MPTS ID, information on services tabulation, the frequency point parameters of NIT table in the said information on services, forms table 1; And find out primitive network ID, MPTS ID, service ID, service name, the service provider of unencrypted service in the said digital television signal SDT table, form table 2.Association list 1 and table 2 obtain the unencrypted service tabulation, and said tabulation comprises frequency point parameters, service ID, service name, service provider etc. at least.

Memory 603 is used to store said table 1, table 2, unencrypted service tabulation, also comprises finally by the user selecting the information on services confirmed.

Search unit 604 is used for the control according to said processor 602, and the search of pursuing frequency is stored in the frequency in the said memory 603, confirms notification processor 602 through the user, and said memory corresponding data is perhaps upgraded in this frequency storage.

Be illustrated in figure 7 as processor 602 structural representations of the present invention, comprise analysis module 701, descrambling judge module 702, extraction module 703, matching module 704.Said descrambling judge module 702, extraction module 703 are connected with said analysis module 701 respectively, and said matching module 704 is connected with said extraction module 703.

Said analysis module 701 is used to analyze current network SI information, obtains NIT information and SDT information.

Said extraction module 703 is used for extracting primitive network ID, MPTS ID, information on services tabulation, the frequency point parameters of NIT information, and extracts primitive network ID, MPTS ID, service ID, service name, the service provider's information in the SDT information.

Said descrambling judge module 702 is used to judge whether current network exists and the corresponding descrambling function of enciphered digital TV; If exist then notification analysis module 701 stops operations such as the extraction, coupling of follow-up unencrypted service tabulation, and call the descrambling operation that corresponding descrambling module (figure does not show) carries out prior art.

Said matching module 704 is used for the data of matching list 1 and table 2, finds out the unencrypted service tabulation, and this tabulation comprises frequency point parameters, service ID, service name, service provider etc.

Beneficial effect of the present invention is, can search out the unencrypted service that the user can watch fast, and the final result of on screen list, listing all can watch, and the user need not to debug one by one, has saved the time of user search digital television service.

Above-described embodiment; The object of the invention, technical scheme and beneficial effect have been carried out further explain, and institute it should be understood that the above is merely embodiment of the present invention; And be not used in qualification protection scope of the present invention; All within spirit of the present invention and principle, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a method of searching for the DTV unencrypted service fast is characterized in that this method comprises,

Receive and analyze the information on services of current network frequency, only mate with the service description list according to the network information table in the said information on services and draw the tabulation of whole network unencrypted service, according to the said unencrypted service of said whole network unencrypted service list search;

Wherein, When the service-information step of said reception and analysis current network frequency; Also comprise and judge whether to have the descrambling function that is directed to said current network; If have then carry out digital television program search step of the prior art, draw whole network unencrypted service listings step otherwise get into only to mate with the service description list according to the network information table in the said information on services;

Carry out said according to the network information table in the said information on services with the service description list only mate draw whole network unencrypted service listings step before; Also comprise and judge whether the current network frequency has whole network service describing table information; If have said whole network service describing table information; Then only mate with the service description list and draw whole network unencrypted service tabulation, otherwise withdraw from and point out the user according to the network information table in the said information on services.

2. the method for a kind of quick search DTV unencrypted service according to claim 1; It is characterized in that; Said only the coupling according to network information table in the information on services and service description list, draw whole network unencrypted service tabulation and comprise; From network information table, extract primitive network ID, MPTS ID, frequency point parameters formation table 1 at least; From the service describing table, extract primitive network ID, MPTS ID, service ID formation table 2 at least, mate primitive network ID and MPTS ID in said table 1 and the table 2, obtain said whole network unencrypted service tabulation.

3. the method for a kind of quick search DTV unencrypted service according to claim 2 is characterized in that, said whole network unencrypted service tabulation comprises primitive network ID, MPTS ID, frequency point parameters, service ID at least.

4. the method for a kind of quick search DTV unencrypted service according to claim 1; It is characterized in that; Comprise in said step according to the said unencrypted service of whole network unencrypted service list search; This frequency information on services of frequency point information retrieval according in the said whole network unencrypted service tabulation obtains frequency point parameters, service ID, service name, service provider, video PID, audio frequency PID, electric program menu information.

5. a device of searching for the DTV unencrypted service fast is characterized in that this device comprises receiving element, processor, memory, search unit, and said processor is connected with said receiving element, memory, search unit respectively;

Search unit is used under the control of said processor, according to the said unencrypted service of said whole network unencrypted service list search;

Said processor also comprises analysis module, descrambling judge module, extraction module, matching module, and said descrambling judge module, extraction module are connected with said analysis module respectively, and said matching module is connected with said extraction module;