CN101594526B - Searching method of network information table in digital TV set and digital TV set - Google Patents
Searching method of network information table in digital TV set and digital TV set Download PDFInfo
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- CN101594526B CN101594526B CN2008101142269A CN200810114226A CN101594526B CN 101594526 B CN101594526 B CN 101594526B CN 2008101142269 A CN2008101142269 A CN 2008101142269A CN 200810114226 A CN200810114226 A CN 200810114226A CN 101594526 B CN101594526 B CN 101594526B
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Abstract
The invention provides a searching method of a network information table (NIT) in a digital TV set and the digital TV set. The method comprises the following steps: storing reference frequency point data which are classified according to receiving areas and receiving systems; inputting the information of the current area; acquiring the reference frequency point data corresponding to the area information; filtering the NIT from the transport stream according to the reference frequency point data. The invention has the benefits that by the searching method of the NIT and the digital TV set provided by the invention, the digital TV set can search for the NIT rapidly, and the problem that users cannot easily operate and utilize the digital TV set as a plurality of parameters are manually input, such as center frequency point rate, modulation mode, symbol rate and the like is solved.
Description
Technical field
The present invention is relevant for digital television, and the receiver in the digital television especially is to the lookup method and the digital television of network information table specifically in a kind of digital television.
Background technology
At present, along with the fast development of digital technology, digital television has replaced conventional television and universalness, and how manufacturing function more powerful, use more easily that digital television is further research topic.
Network information table in the digital television business information standard (NIT) is to be responsible for transmitting transmission (TS) stream physical structure and the relevant information of self Network Transmission characteristic, and wired system NIT information transmitted comprises: information such as MPTS (TS stream) center frequency point frequency, modulation system, symbol rate, FEC mode; Terrestrial digital television system NIT information transmitted comprises: TS stream center frequency point frequency, carrier number, modulation system, FEC code check, the first-class information of PN sequence.
Generally, NIT is present in each the digital frequency that carries TS stream, if receiver be tuned to one of them frequency, and to the reception of NIT handle can the acquisition system in all TS flow transmission information realize the quick search of programs.
In one Chinese patent application number is 200310116954.0; Denomination of invention is a kind of to specific wired system for disclosing in the patent documentation of " method of the quick program searching of a kind of digital television system receiving terminal ", searches out the method for NIT through manual mode input NIT reference data information (NIT reference number frequency and transmission parameter).
Shown in Figure 1 is the above-mentioned this existing flow chart of realizing the NIT search through manual mode input NIT reference data information.
Wherein, this method as shown in Figure 1 is according to particular system NIT reference frequency point information, needs the user manually to import many parameters such as center frequency point frequency, modulation system, symbol rate, and the user operates not too easily and uses; And if under multisystem conditions such as wired and ground, work, the parameter item of required input will be more; If receiver is used in many areas, the user just need import wired system and or the reference frequency point information of terrestrial broadcast system respectively according to the location.
Therefore, can search fast network information table with regard to needs are a kind of, and make the user can be more simply, the digital television of operation easily.
At this, quote the Chinese patent publication number and be " signal processing apparatus and the signal processing method " of CN1602073A and " on ip network, transmitting DVB service method and equipment " patent documentation that the Chinese patent publication number is CN1864388A as prior art of the present invention.
Summary of the invention
The object of the present invention is to provide in a kind of digital television lookup method, so that network information table (NIT table) is searched fast to network information table.
Another object of the present invention is to provide a kind of digital television, to solve owing to manually importing the problem that many parameters such as center frequency point frequency, modulation system, symbol rate cause the user to operate not too easily and use.
In order to realize the purpose of the invention described above, the embodiment of the invention provides in a kind of digital television the lookup method of network information table, and this method comprises: storage is by receiving the reference frequency point data that area and receiving system are classified; Import the regional information of current location; Obtain and said regional information corresponding reference frequency point data; According to said reference frequency point data, screen information table from MPTS.
In order to realize another purpose of the invention described above, embodiments of the invention also provide a kind of digital television, comprising: memory cell is used to store the reference frequency point data by receiving the classification of area and receiving system; Input unit is used to import the regional information of current location; Obtain the reference frequency point unit, be used to obtain and said regional information corresponding reference frequency point data; Filter element according to said reference frequency point data, filters out network information table from MPTS.
Beneficial effect of the present invention is; Through a kind of lookup method and digital television thereof to network information table is provided; Digital television can be searched network information table (NIT table) fast, and solved owing to manually importing the problem that many parameters such as center frequency point frequency, modulation system, symbol rate cause the user to operate not too easily and use.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes an one of the application
Divide, do not constitute qualification of the present invention.In the accompanying drawings:
Shown in Figure 1 is the existing flow chart of realizing the NIT search through manual mode input NIT reference data information.
Shown in Figure 2 is the structured flowchart of the digital television of the embodiment of the invention 1.
In the digital television of the embodiment of the invention 1 that shown in Figure 3 is to the flow chart of the lookup method of network information table.
Signal in the multisystem digital television of the embodiment of the invention 1 that shown in Figure 4 is moves towards figure.
That shown in Figure 5 is the NIT reference frequency point information data structure figure of the embodiment of the invention 1.
Shown in Figure 6 is the structured flowchart of the digital television of the embodiment of the invention 2.
In the digital television of the embodiment of the invention 2 that shown in Figure 7 is to the flow chart of the lookup method of network information table.
Select the sketch map of regional information in the digital television of the embodiment of the invention 2 that shown in Figure 8 is.
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 digital television that can search fast network information table.Below in conjunction with accompanying drawing the present invention is elaborated.
Embodiment 1
Shown in Figure 2 is the structured flowchart of the digital television of the embodiment of the invention 1, and wherein this digital television comprises: memory cell 201 is used to store the reference frequency point data by receiving the classification of area and receiving system; Input unit 202 is used to import the regional information of current location; Obtain reference frequency point unit 203, be used to obtain and said regional information corresponding reference frequency point data; Filter element 204 according to said reference frequency point data, filters out network information table from MPTS.
To the flow chart of the lookup method of network information table, specify the method that network information table is searched fast of the present invention in the digital television of the embodiment of the invention 1 that shown in Figure 3 is below in conjunction with Fig. 3.
At first, digital television of the present invention before dispatching from the factory earlier with being deposited into (step S301) in this digital television by receiving the reference frequency point information data that area and receiving system classify;
Then, the user imports the regional information of present location when frequency modulation, if for example at present in Nanjing, then through digital television being operated and being found Nanjing again after finding Jiangsu Province earlier, confirms operation (step S302) at last;
Digital television obtains and said regional information corresponding reference frequency point data according to the above-mentioned regional information of importing, and according to reference frequency point data terrestrial tuner/demodulator, wired tuner/demodulator parameter (step S303) is set;
At last, these set terrestrial tuner/demodulator, wired tuner/demodulator output transmission (TS) stream of parameter and filter out NIT by filter element and show (step S304).
Wherein, Above-mentioned digital television can be a digital television of supporting multisystem; Also can be the single system digital television, the user judges whether the current digit television set supports multisystem earlier at the input regional information and after having obtained the reference frequency point information data; If support multisystem then simultaneously the parameter of ground tuner/demodulators, wired tuner/demodulator be provided with; If single system is then judged line transmission system or terrestrial broadcast system, when the parameter that only is judged as when being terrestrial broadcast system the ground tuner/demodulators is provided with, being judged as is the parameter that line transmission system then only is provided with wired tuner/demodulators.
The signal that shown in Figure 4 is in the multisystem digital television of the present invention moves towards figure, and wherein this multisystem digital television receiver is made up of front-end and back-end two parts.Fore-end has RF1 and two signalling channels of RF2; The RF1 passage comprises that a tuner and demodulator are used for the reception and the processing of ground broadcast signal, and the RF2 passage comprises that equally a tuner and a demodulator are used for reception and processing to the wired system signal.Rear end part relates generally to a regional information and selects module to supply the user that the location is set; A storage medium is used for storing and regional corresponding reference frequency point information data structure; A front-end control module is used for being provided with front end tuner and demodulator reference frequency point information parameter; A TS stream parsing module is responsible for TS stream signal is received and parse the NIT table.
Wherein, The NIT reference frequency point information data structure of this embodiment 1 is as shown in Figure 5; This NIT reference frequency point information data structure comprises the data structure of reference frequency point data of data structure and line transmission system of the reference frequency point data of terrestrial broadcast system, and the data structure of the reference frequency point data of above-mentioned terrestrial broadcast system comprises: reference frequency point, carrier system, PN sequence; And the data structure of the reference frequency point data of above-mentioned line transmission system comprises: reference frequency point, symbol rate, modulation system.
Embodiment 2
Shown in Figure 6 is the structured flowchart of the digital television of the embodiment of the invention 2, and wherein this digital television comprises: memory cell 601 is used to store the reference frequency point data by receiving the classification of area and receiving system; Input unit 602 is used to import the regional information of current location; Obtain reference frequency point unit 603, be used to obtain and said regional information corresponding reference frequency point data; Judging unit 604 is used to judge whether to support multisystem; Parameter set unit 605 is used to be provided with the tuner/demodulators parameter of passage; Filter element 606 according to said reference frequency point data, filters out network information table from MPTS.
To the flow chart of the lookup method of network information table, specify the method that network information table is searched fast of the present invention in the digital television of the embodiment of the invention 2 that shown in Figure 7 is below in conjunction with Fig. 7.
At first, digital television of the present invention before dispatching from the factory earlier with being deposited into (step S701) in the storage medium in this digital television by receiving the reference frequency point information data that area and receiving system classify;
Then NIT table search beginning (step S702);
The user imports the regional information of present location when frequency modulation, if for example at present in Nanjing, then through digital television being operated and being found Nanjing (as shown in Figure 8) again after finding Jiangsu Province earlier, confirm operation (step S703) at last;
Digital television accesses from above-mentioned storage medium and said regional information corresponding reference frequency point data (step S704) according to the above-mentioned regional information of being imported;
Do you judge that this digital television supports multisystem? (step S705);
When supporting that multisystem is " being ", the parameter (step S706) of terrestrial tuner/demodulator is set earlier, the parameter (step S707) of wired tuner/demodulators also is set simultaneously;
What system do you when not supporting that multisystem is " denying ", judge this digital television supports? (step S708);
When this digital television is supported terrestrial broadcast system, the parameter (step S709) of terrestrial tuner/demodulator is set automatically;
When this digital television is supported line transmission system, the parameter (step S710) of wired tuner/demodulators is set automatically;
At last, the NIT that from TS stream, filters out corresponding to current location shows (step S711).
The NIT reference frequency point information data structure of present embodiment 2 comprises the data structure of reference frequency point data of data structure and line transmission system of the reference frequency point data of terrestrial broadcast system, and the data structure of the reference frequency point data of above-mentioned terrestrial broadcast system comprises: reference frequency point, carrier system, PN sequence; And the data structure of the reference frequency point data of above-mentioned line transmission system comprises: reference frequency point, symbol rate, modulation system.
Beneficial effect of the present invention is; Through a kind of lookup method and digital television thereof to network information table is provided; Digital television can be searched network information table (NIT table) fast, and solved owing to manually importing the problem that many parameters such as center frequency point frequency, modulation system, symbol rate cause the user to operate not too easily and use.
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 (10)
- In the digital television to the lookup method of network information table, it is characterized in that, said method comprising the steps of:Storage is by the reference frequency point data that receives the classification of area and receiving system;Import the regional information of current location;Obtain and said regional information corresponding reference frequency point data;According to said reference frequency point data, screen information table from MPTS.
- 2. the lookup method to network information table as claimed in claim 1 is characterized in that, the data structure of said reference frequency point data is supported multisystem work.
- 3. the lookup method to network information table as claimed in claim 2 is characterized in that, the said step of obtaining with said regional information corresponding reference frequency point data comprises:Judge whether to support multisystem, said multisystem comprises terrestrial broadcast system and line transmission system;The tuner/demodulators parameter of two passages is set when supporting multisystem simultaneously; Wherein, passage comprises that a tuner and ground demodulator are used for the reception and the processing of ground broadcast signal, and another passage comprises that a tuner and a wired demodulator are used for reception and processing to the wired system signal.
- 4. the lookup method to network information table as claimed in claim 2 is characterized in that said multisystem comprises terrestrial broadcast system and line transmission system.
- 5. the lookup method to network information table as claimed in claim 4 is characterized in that,Support the data structure of the reference frequency point data of said terrestrial broadcast system to comprise: reference frequency point, carrier system, PN sequence;Support the data structure of the reference frequency point data of said line transmission system to comprise: reference frequency point, symbol rate, modulation system.
- 6. a digital television is characterized in that, said digital television comprises:Memory cell is used to store the reference frequency point data by receiving the classification of area and receiving system;Input unit is used to import the regional information of current location;Obtain the reference frequency point unit, be used to obtain and said regional information corresponding reference frequency point data;Filter element according to said reference frequency point data, filters out network information table from MPTS.
- 7. digital television as claimed in claim 6 is characterized in that, said digital television also comprises:Judging unit is used to judge whether to support multisystem, and said multisystem comprises terrestrial broadcast system and line transmission system;Parameter set unit is used to be provided with the tuner/demodulators parameter of two passages; Wherein, passage comprises that a tuner and ground demodulator are used for the reception and the processing of ground broadcast signal, and another passage comprises that a tuner and a wired demodulator are used for reception and processing to the wired system signal.
- 8. digital television as claimed in claim 6 is characterized in that,The data structure of said reference frequency point data is supported multisystem work.
- 9. digital television as claimed in claim 8 is characterized in that,Said multisystem comprises terrestrial broadcast system and line transmission system.
- 10. like claim 7 or 9 described digital televisions, it is characterized in that,Support the data structure of the reference frequency point data of said terrestrial broadcast system to comprise: reference frequency point, carrier system, PN sequence;Support the data structure of the reference frequency point data of said line transmission system to comprise: reference frequency point, symbol rate, modulation system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101142269A CN101594526B (en) | 2008-05-30 | 2008-05-30 | Searching method of network information table in digital TV set and digital TV set |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2008101142269A CN101594526B (en) | 2008-05-30 | 2008-05-30 | Searching method of network information table in digital TV set and digital TV set |
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| CN101594526A CN101594526A (en) | 2009-12-02 |
| CN101594526B true CN101594526B (en) | 2012-07-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102143399B (en) * | 2011-03-31 | 2013-09-04 | 深圳创维数字技术股份有限公司 | Method, server and system for testing limit of channel storage of set-top box |
| CN103607598A (en) * | 2013-10-24 | 2014-02-26 | 深圳Tcl新技术有限公司 | Method and device for automatically recognizing network operator to realize data configuration |
| CN105025352A (en) * | 2015-07-21 | 2015-11-04 | 深圳市茁壮网络股份有限公司 | Digital television channel data packaging method and rapid searching method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1625240A (en) * | 2003-12-03 | 2005-06-08 | 北京中视联数字系统有限公司 | Method of quick searching program by receiving terminal of digital TV system |
| CN1897665A (en) * | 2005-07-13 | 2007-01-17 | 上海凡捷电子科技有限公司 | TV-set and its frequency-channel searching method |
| CN1956520A (en) * | 2005-10-26 | 2007-05-02 | 深圳Tcl新技术有限公司 | Method for seaching TV program band |
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- 2008-05-30 CN CN2008101142269A patent/CN101594526B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1625240A (en) * | 2003-12-03 | 2005-06-08 | 北京中视联数字系统有限公司 | Method of quick searching program by receiving terminal of digital TV system |
| CN1897665A (en) * | 2005-07-13 | 2007-01-17 | 上海凡捷电子科技有限公司 | TV-set and its frequency-channel searching method |
| CN1956520A (en) * | 2005-10-26 | 2007-05-02 | 深圳Tcl新技术有限公司 | Method for seaching TV program band |
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