CN101568011A

CN101568011A - Method and device for rapidly searching unencrypted service of digital television

Info

Publication number: CN101568011A
Application number: CNA2008101049240A
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: 2009-10-28
Anticipated expiration: 2028-04-24
Also published as: CN101568011B

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 Digital Television unencrypted service

Technical field

The present invention relates to digital TV field, is a kind of method and device of quick search Digital Television 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 the deciphering of IC-card and decipher realization 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 is carried out encryption and decryption, generally include the program making end, can send the digital television signal packet to heterogeneous networks, described TV signal data bag meets relevant criterion, audio frequency and video compressed format meets relevant criterion, SI in the described 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 transport stream, also can describe other transport stream, and this is distinguished by TableID.EIT represents 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 by 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 by 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 described signal decoded, possess the SI information of filtration and analyzing stored, can judge and self whether 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 not during the mandate of this cryptographic services, though may not demonstrate the TV service of this frequency on the screen, but the information that the service search unit still can go each frequency to search for and demonstrate these cryptographic services one by one in the service list that the user can see is selected for the user, 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 utilize encryption key to decode before using.But this scheme can not change the time of service search.

In 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 Digital Television 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 Digital Television unencrypted service, solved and to have realized in the prior art that set-top box 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 Digital Television unencrypted service, it is characterized in that this method comprises,

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

A further aspect according to a kind of quick search Digital Television unencrypted service method of the present invention, when the information on services step of described reception and analysis current network frequency, also comprise and judge whether to have the descrambling function that is directed to described current network, if have then carry out digital television service search step of the prior art, draw whole network unencrypted service listings step otherwise enter only to mate according to the network information table in the described information on services and service description list.

Another further aspect according to a kind of quick search Digital Television unencrypted service method of the present invention, carry out described according to the network information table in the described information on services and 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 described whole network service describing table information, then only mate and draw whole network unencrypted service tabulation, otherwise withdraw from and point out the user according to the network information table in the described information on services and service description list.

Another further aspect according to a kind of quick search Digital Television 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 described 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 Digital Television unencrypted service method of the present invention, described only the coupling according to the 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, transport stream ID, frequency point parameters formation table 1 at least, from the service describing table, extract primitive network ID, transport stream ID, service ID formation table 2 at least, mate primitive network ID and transport stream ID in described table 1 and the table 2, obtain described whole network unencrypted service tabulation.

According to another further aspect of a kind of quick search Digital Television unencrypted service method of the present invention, described whole network unencrypted service tabulation comprises primitive network ID, transport stream ID, frequency point parameters, service ID at least.

Another further aspect according to a kind of quick search Digital Television unencrypted service method of the present invention, comprise in described step according to the described unencrypted service of whole network unencrypted service list search, retrieve this frequency information on services according to the frequency point information in the described whole network unencrypted service tabulation, obtain 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 described processor is connected with described receiving element, memory, search unit respectively;

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

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

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

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

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

Described 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 described analysis module to stop subsequent operation;

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

Described matching module is used for drawing the tabulation of whole network unencrypted service according to described 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 listing on screen list 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 limitation of the 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 purpose, technical solutions and advantages of the present invention clearer,, the present invention is described in 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 a limitation of the invention.

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

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 as 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 enters step 103 when unavailable in current machine, otherwise enters 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, transport stream ID and (be called for short: table 1) according to described NIT data if whole network SDT information is arranged, and enter step 104, otherwise enter step 107.

Step 104, receive all SDT of current frequency and SDT (Other) information, judge according to describing at the free_ca_mode of each service among the SDT whether this service encrypts, according to the information among the SDT, institute in the whole network described in the current frequency or the present networks is had or not enciphered digital TV service ID and corresponding primitive network ID thereof, transport stream ID and relevant information form the second tabulation (abbreviation: table 2) be stored in the memory as 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 transport stream 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 one by one according to parameters such as primitive network ID, transport stream ID, frequency and service ID, 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 the time of serving frequency, and, also reduced receiver scans judgement to a certain frequency intrinsic parameter (as single carrier, multicarrier, QAM parameter etc.) process because frequency point parameters is known in NIT information.

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 set-top box and whether has available frequency point information,, judges whether it is to carry out service search for the first time that is, if this set-top box has been stored frequency point information, then enters step 203, otherwise enters step 204.

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

Step 204 if described set-top box 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 enter step 206, otherwise enters step 207.

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

Step 207 judges that whether this frequency has been a last frequency in the present networks, if then enter step 208, otherwise enters 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 carry out step 304 in this frequency.

Step 303 jumps to corresponding frequency with whole network SI information by 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 transport stream 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 enter 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 represents 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 described table 2 comprises information such as primitive network ID, transport stream 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 judges whether the user will carry out precise search, if carry out precise search then enter step 406, otherwise enters 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 enters 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 described 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 enter step 505, otherwise enters step 501.

Step 505 is presented at described unencrypted service tabulation on the screen, selects to wish the service of redirect for the user.

Wherein, described 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 schematic diagram that the present invention searches for unencrypted service fast, comprise receiving element 601, processor 602, memory 603, search unit 604.Described receiving element 601, memory 603, search unit 605 are connected with described processor 602 respectively.

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

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

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

Search unit 604 is used for the control according to described processor 602, is stored in frequency in the described memory 603 by the search of frequency, determines notification processor 602 by the user, with this frequency storage or upgrade described memory corresponding data.

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.Described descrambling judge module 702, extraction module 703 are connected with described analysis module 701 respectively, and described matching module 704 is connected with described extraction module 703.

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

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

Described 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.

Described 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 listing on screen list 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; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is the specific embodiment of the present invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, 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 Digital Television unencrypted service fast is characterized in that this method comprises,

2. the method for a kind of quick search Digital Television unencrypted service according to claim 1, it is characterized in that, when the information on services step of described reception and analysis current network frequency, also comprise and judge whether to have the descrambling function that is directed to described current network, if have then carry out digital television program search step of the prior art, draw whole network unencrypted service listings step otherwise enter only to mate according to the network information table in the described information on services and service description list.

3. the method for a kind of quick search Digital Television unencrypted service according to claim 1, it is characterized in that, carry out described according to the network information table in the described information on services and 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 described whole network service describing table information, then only mate and draw whole network unencrypted service tabulation, otherwise withdraw from and point out the user according to the network information table in the described information on services and service description list.

4. the method for a kind of quick search Digital Television unencrypted service according to claim 3, it is characterized in that, 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 described whole network information on services of this frequency, and and then 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.

5. the method for a kind of quick search Digital Television unencrypted service according to claim 1, it is characterized in that, described only the coupling according to the 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, transport stream ID, frequency point parameters formation table 1 at least, from the service describing table, extract primitive network ID, transport stream ID, service ID formation table 2 at least, mate primitive network ID and transport stream ID in described table 1 and the table 2, obtain described whole network unencrypted service tabulation.

6. the method for a kind of quick search Digital Television unencrypted service according to claim 5 is characterized in that, described whole network unencrypted service tabulation comprises primitive network ID, transport stream ID, frequency point parameters, service ID at least.

7. the method for a kind of quick search Digital Television unencrypted service according to claim 1, it is characterized in that, comprise in described step according to the described unencrypted service of whole network unencrypted service list search, retrieve this frequency information on services according to the frequency point information in the described whole network unencrypted service tabulation, obtain frequency point parameters, service ID, service name, service provider, video PID, audio frequency PID, electric program menu information.

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

9. the device of a kind of quick search Digital Television unencrypted service according to claim 8, it is characterized in that, described processor also comprises analysis module, descrambling judge module, extraction module, matching module, described descrambling judge module, extraction module are connected with described analysis module respectively, and described matching module is connected with described extraction module;