CN102572340B - Digital satellite television channel search method and digital satellite television machine - Google Patents
Digital satellite television channel search method and digital satellite television machine Download PDFInfo
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Abstract
Disclosure one digital satellite television channel search method, the method comprises the steps: full-band downlink frequency parameter is scanned for, and stores the downlink frequency parameter data comprising TV signal; Resolve stored downlink frequency parameter data, and store obtained channel data information. Disclosure one digital satellite television machine, this television set at least includes search module, parsing module and memory module; Search module, for downstream frequency parameter being scanned within the scope of full frequency band, obtains comprising the downlink frequency parameter data of TV signal; Parsing module, for the downlink frequency parameter data searched is resolved, obtains channel data information; The memory module channel data information for storing the downlink frequency parameter data that obtains of search and parsing obtains.
Description
Technical field
The present invention relates to a kind of digital satellite television channel search method and digital satellite television machine.
Background technology
In current digital satellite television scheme, because the bandwidth of Signals in Satellite Data Stream and signal particularity, determine channel search process long. On market, the time of one satellite channel of mainstream model search can reach 20-30 minute.
What adopt at present is traditional type searching method, namely first whether first TP (downstream frequency parameter) of search has signal, if there being signal, continue to be confirmed whether to get effective channel data, if effective information can be got, store, otherwise continue search for next TP, until satellite all band TP has searched for.
In realizing process of the present invention, inventor have found that TP search and TP data message are resolved to put by the method and carry out in one step. But, TP search carries out in modem, and the parsing of data message carries out in master chip. Switch between the two frequently, have a strong impact on tuning speed.
Summary of the invention
In order to overcome above-mentioned defect, the present invention provides a kind of speed digital satellite television channel search method faster.
For reaching above-mentioned purpose, on the one hand, the present invention provides a kind of digital satellite television channel search method, and described method comprises the steps:
1.1 pairs of full-band downlink frequency parameters scan for, and store the downlink frequency parameter data comprising TV signal;
1.2 resolve stored downlink frequency parameter data, and store obtained channel data information.
On the other hand, the present invention provides a kind of digital satellite television machine, and described television set at least includes search module, parsing module and memory module;
Search module, for downstream frequency parameter being scanned within the scope of full frequency band, obtains comprising the downlink frequency parameter data of TV signal;
Parsing module, for the downlink frequency parameter data searched is resolved, obtains channel data information;
Memory module, for the channel data information storing the downlink frequency parameter data that obtains of search and parsing obtains.
Digital satellite television channel search method of the present invention in two steps, search for the full frequency band TP data of this satellite and have the TP data of TV signal to store detection by the first step; Second step carries out channel information parsing according to the TP data of storage, is stored by acquired effective channel data, until the TP data parsing of all storages completes. Avoid switching between modem and master chip continually, improve the tuning speed of digital satellite television, convenient save time.
Digital satellite television machine of the present invention is provided with search module, parsing module and memory module, can adopt above-mentioned digital satellite television channel search method, and the speed of tuning faster, uses convenient.
Accompanying drawing explanation
Fig. 1 is digital satellite television channel search method principle schematic of the present invention.
Fig. 2 is preferred embodiment TP search condition machine flow chart.
Fig. 3 is preferred embodiment channel information search condition machine flow chart.
Detailed description of the invention
Below in conjunction with Figure of description and embodiment, the present invention is described in detail.
Digital satellite television channel search method of the present invention comprises the steps:
The full-band downlink frequency parameter of 1.1 pairs of these satellites scans for, and stores the downlink frequency parameter data comprising TV signal;
1.2 resolve stored downlink frequency parameter data, and store obtained channel data information.
TP (Transponder) is exactly the meaning of satellite repeater parameter (downstream frequency parameter) in satellite digital television receiver. Downstream frequency parameter refers to that satellite launches the frequency that signal uses earthward, and the downstream frequency parameter that different transponders uses is different, and the parameter set when using DVB is also just different. If parameter arranges incorrect, it is impossible to receive corresponding programme content.
By TP data search and channel information resolving are separated, it is to avoid switch between modem and master chip continually as prior art. Effectively improve channel search method, thus improving the tuning speed of digital satellite television machine.
The concrete executive mode of step 1.1 is not limit, and its preferred embodiment includes following sub-step:
2.1 obtain the relevant parameter of current tuning according to satellite parametric reduction, and arrange above-mentioned parameter. Each parameter according to setting calculates downstream frequency parameter.
2.2 arrange tuner and modem related register parameter according to downstream frequency parameter.
2.3 read and analyze modem parameter, if comprising TV signal, perform step 2.4, if not comprising TV signal, perform step 2.5.
The data that 2.4 storage current downlink frequency parameters comprise.
2.5 judge whether to complete full frequency band search, if completed, carrying out step 2.6, without completing, carrying out step 2.2. Wherein, full frequency band scope is that the specifications according to tuner (tuning device) come, the numerical value that neither one is fixing, which type of tuner is scheme adopt, just determine this full frequency band scope according to the specifications of this tuner, in general, DVBS tuner band limits is 950MHZ-2150MHZ.
2.6 have judged whether that full downstream frequency parameter area is searched for, if be not fully complete, carry out step 2.1, if completed, proceed to downstream frequency Parameter analysis of electrochemical step.
By searching in this full downstream frequency parameter area and storing downlink frequency parameter data step, the downlink frequency parameter data all comprising TV signal is stored, for follow-up data analyzing step. Achieve being kept completely separate of TP data search process and channel information resolving.
In step 2.1, tuning parameter at least includes local frequency, polarity, satellite television switching switch and supplying power for tuner voltage. Wherein, satellite television switching switch is set as out, and prepares for tuning work; Supplying power for tuner voltage preferred settings value is 13/18V or 14/19V, and concrete setting value needs the situation according to actual tuner to be selected voluntarily by user.
In satellite television broadcasting, the polarization mode of signal has two classes: one is linear polarization, and one is circular polarisation. Wherein it is divided into again horizontal polarization and vertical polarization under online polarization mode; Left-hand circular polarization and right-handed circular polarization is divided again under circular polarisation mode.
The preferred steps calculating downstream frequency parameter in step 2.1 includes:
2.1.1, Frequency point is set. In prior art (product), the scope of Frequency point is (950,2150), and each used Frequency point is a certain integer in above-mentioned scope, with 10M for step units.
2.1.2 downstream frequency parameter is calculated. Satellite band mainly divides C-band and KU wave band two kinds. Local frequency and Frequency point subtract each other and obtain C-band downstream frequency parameter, and local frequency is added with Frequency point and obtains KU band downstream frequency parameter.
In step 2.1, the satellite parametric reduction for arranging tuning parameter comes from satellite digital television receiver.
Step 2.2 making high frequency head (LowNoiseBlock:LNB) is also referred to as low noise block downconverter, its function is through amplifying and down coversion by the satellite-signal transmitted by feed, Ku or C-band signal are become L-band, sends DVB to through coaxial cable. Generally can be divided into C frequency lnb (3.7ghz-4.2ghz) and KU frequency lnb (10.7ghz-12.75ghz). Because satellite signals quite faint and coaxial cable transmission more high signal loss of frequency before arriving at antenna is more big, improve so just needing lnb to do. The workflow of lnb is exactly satellite high-frequency signals is first amplified to hundreds thousand of times of recycling local oscillation circuits high-frequency signals is converted to intermediate frequency 950mhz-2050mhz (determining intermediate frequency range according to lnb kind), is beneficial to the transmission of coaxial cable and the solution mediation work of DVB.
The data of the downstream frequency parameter in step 2.4 at least include Frequency point and symbol rate. The symbol rate of satellite programming refers to the speed that data are transmitted, and this parameter is relevant with the bit rate of signal and channel parameter. The unit of symbol rate is MB/S. When the number of programs that a carrier signal is carried is more many, symbol rate is more big.
The concrete executive mode of step 1.2 is not limit, and its preferred mode includes following sub-step:
Stored downlink frequency parameter data in 7.1 read step 2.4.
7.2 arrange related register parameter according to downlink frequency parameter data.
7.3 resolve downlink frequency parameter data, it may be judged whether obtain channel data information, if, carried out step 7.4, if being carried out step 7.5.
7.4 storage channel data information.
7.5 judge whether to resolve the complete downlink frequency parameter data all stored, if it is tuning EP (end of program); If otherwise carrying out step 7.1.
By above-mentioned steps, complete channel information resolving. Stored downlink frequency parameter data in step before is resolved and obtains channel data information, it is achieved that the quick channel search of digital satellite television machine.
The downlink frequency parameter data read in step 7.1 at least includes Frequency point and symbol rate, and this is identical with the Frequency point in step 2.4 and symbol rate.
In step 7.2, it is depositor corresponding with tuner and modem that downlink frequency parameter data arranges the depositor of parameter. In digital satellite television machine, depositor has a lot, and the object register arranging parameter in this step is only depositor corresponding with tuner and modem. And, the depositor in this step and the depositor in step 2.2 are without direct dependency.
Illustrate as follows for digital satellite television channel search method of the present invention, the TP search condition machine of foundation and channel data search condition machine.
The state description of TP search condition machine:
STATE_BLINDSCAN_INIT---initializes TP and searches for relevant parameter, obtains original frequency point
STATE_BLINDSCAN_DISHSWITCH---, according to tuning menu setting, calculates the relevant parameter of this full frequency band tuning, as: satellite television switching switch, Frequency point and supplying power for tuner voltage etc.
STATE_BLINDSCAN_START---arranges the beginning frequency of this search and terminates frequency
STATE_BLINDSCAN_WAIT_START-OK---confirms modem state OK
STATE_BLINDSCAN_NEXTFREQ---calculates the Frequency point of next one search, and arranges corresponding registers
STATE_BLINDSCAN_WAIT_SCANFREQ_OK---waits the state that modem returns, it is judged that TP search condition
STATE_BLINDSCAN_GETTP---finds the TP data having modulated television signal, and stores
STATE_BLINDSCAN_END---terminates TP search condition machine
TP search condition machine flow chart is as shown in Figure 2.
The state description of channel information search condition machine:
STATE_SCAN_INIT---empties all channel datas, and obtains the TP data of first storage
STATE_SCAN_NEXT_CHANNEL---obtains next TP data
STATE_SCAN_TUNE_TO_RF_CHANNEL---, according to the TP data got, arranges the relevant parameter such as Frequency point, symbol rate
STATE_SCAN_GET_PROGRAMS---channel data resolves, and is confirmed whether to parse effective channel information
STATE_SCAN_SAVE_PROGRAMS---channel information stores
STATE_SCAN_END---terminates channel information search condition machine
Channel information search condition machine flow process such as Fig. 3 is.
Digital satellite television machine of the present invention at least includes search module, parsing module and memory module. Wherein, search module, for downstream frequency parameter being scanned within the scope of full frequency band, obtains comprising the downlink frequency parameter data of TV signal; Parsing module, for the downlink frequency parameter data searched is resolved, obtains channel data information; The memory module channel data information for storing the downlink frequency parameter data that obtains of search and parsing obtains.
Being arranged by said structure, digital satellite television machine of the present invention can use digital satellite television channel search method of the present invention, and the speed of tuning faster, uses convenient.
Preferred embodiment one: one digital satellite television machine is provided with search module, parsing module and memory module, adopts digital satellite television channel search method to carry out tuning. Having been provided with satellite parametric reduction in digital satellite television machine, the relevant parameter according to the current tuning of these parameter acquiring, including local frequency, polarity, satellite television switching switch and supplying power for tuner voltage etc. Arranging above-mentioned parameter, local frequency is 9750/10600MHZ, and satellite television switching switch is set to ON, and supplying power for tuner voltage is set to 13/18V, and polarity is determined according to supplying power for tuner voltage.
Arranging Frequency point is 950MHZ, and local frequency and Frequency point subtract each other and obtain C-band downstream frequency parameter, and local frequency is added with Frequency point and obtains KU band downstream frequency parameter. Tuner and modem related register parameter are set according to downstream frequency parameter.
Read and analyze modem parameter to learn and in this downstream frequency parameter, comprise TV signal, the data that storage current downlink frequency parameter comprises. Judge and be not fully complete full frequency band search, Frequency point being set to 960MHZ, calculates downstream frequency parameter. Tuner and modem related register parameter are set according to downstream frequency parameter. Reading and analyze modem parameter to learn and comprise TV signal in this downstream frequency parameter, the data that storage current downlink frequency parameter comprises, data include Frequency point and symbol rate etc.
Repeat said frequencies point setting up procedure, until Frequency point is set to 2150MHZ. Carry out the search of next data in downstream frequency parameter area again, repeat said process. Until search is complete in full downstream frequency parameter area, proceed to downlink frequency parameter data analyzing step.
TP search work completes once in modem, the downlink frequency parameter data comprising TV signal is stored, during for next step resolution data. Avoid switching between modem and master chip continually, improve the tuning speed of digital satellite television, convenient save time.
Preferred embodiment two: one digital satellite television machine is provided with search module, parsing module and memory module, adopts digital satellite television channel search method to carry out tuning. Having been provided with satellite parametric reduction in digital satellite television machine, the relevant parameter according to the current tuning of these parameter acquiring, including local frequency, polarity, satellite television switching switch and supplying power for tuner voltage etc. Arranging above-mentioned parameter: local frequency is 5150MHZ, satellite television switching switch is set to ON, and supplying power for tuner voltage is set to 14/19V, and polarity is determined according to supplying power for tuner voltage.
Arranging Frequency point is 950MHZ, and local frequency and Frequency point subtract each other and obtain C-band downstream frequency parameter, and local frequency is added with Frequency point and obtains KU band downstream frequency parameter. Tuner and modem related register parameter are set according to downstream frequency parameter.
Read and analyze modem parameter and learn there is no effective TV signal in this downstream frequency parameter, it is judged that learn and be not fully complete full frequency band search, Frequency point is set to 960MHZ, calculate downstream frequency parameter. Tuner and modem related register parameter are set according to downstream frequency parameter. Reading and analyze modem parameter to learn and comprise TV signal in this downstream frequency parameter, the data that storage current downlink frequency parameter comprises, data include Frequency point and symbol rate etc.
Repeat said frequencies point setting up procedure, until Frequency point is set to 2150MHZ. Carry out the search of next data in downstream frequency parameter area again, repeat said process. Until search is complete in full downstream frequency parameter area, proceed to downlink frequency parameter data analyzing step.
TP search work completes once in modem, the downlink frequency parameter data comprising TV signal is stored, during for next step resolution data. Avoid switching between modem and master chip continually, improve the tuning speed of digital satellite television, convenient save time.
Preferred embodiment three: one digital satellite television machine is provided with search module, parsing module and memory module, adopts digital satellite television channel search method to carry out tuning. Having been provided with satellite parametric reduction in digital satellite television machine, the relevant parameter according to the current tuning of these parameter acquiring, including local frequency, polarity, satellite television switching switch and supplying power for tuner voltage etc. Arranging above-mentioned parameter: local frequency is 11300MHZ, satellite television switching switch is set to ON, and supplying power for tuner voltage is set to 13/18V, and polarity is determined according to supplying power for tuner voltage. Complete in full downstream frequency parameter area and proceed to downlink frequency parameter data analyzing step after search.
Read the first downlink frequency parameter data stored, including Frequency point and symbol rate etc. According to these downlink frequency parameter data, the register parameters relevant to tuner and modem is set. Resolve downlink frequency parameter data, the channel data information obtained is stored. Read next line frequency data, including Frequency point and symbol rate etc. According to these downlink frequency parameter data, the register parameters relevant to tuner and modem is set. Resolve downlink frequency parameter data, the channel data information obtained is stored.
Repeat this process until the downlink frequency parameter data stored all resolves complete, tuning EP (end of program).
Downlink frequency parameter data analyzing step completes on master chip, by complete for the disposable whole parsings of downlink frequency parameter data stored. Avoid switching between modem and master chip continually, improve the tuning speed of digital satellite television, convenient save time.
The system of preferred embodiment four: digital satellite television machine adopts digital satellite television channel search method to carry out tuning. Having been provided with satellite parametric reduction in digital satellite television machine, the relevant parameter according to the current tuning of these parameter acquiring, including local frequency, polarity, satellite television switching switch and supplying power for tuner voltage etc. Arranging above-mentioned parameter: local frequency is 9750/10600MHZ, satellite television switching switch is set to ON, and supplying power for tuner voltage is set to 14/19V, and polarity is determined according to supplying power for tuner voltage. Complete in full downstream frequency parameter area and proceed to downlink frequency parameter data analyzing step after search.
Read the first downlink frequency parameter data stored, including Frequency point and symbol rate etc. According to these downlink frequency parameter data, the register parameters relevant to tuner and modem is set. Resolve downlink frequency parameter data, it does not have obtain channel data information. Judge to learn and do not complete all of data analysis.
Read next line frequency data, including Frequency point and symbol rate etc. According to these downlink frequency parameter data, the register parameters relevant to tuner and modem is set. Resolve downlink frequency parameter data, the channel data information obtained is stored. Repeat this process until the downlink frequency parameter data stored all resolves complete, tuning EP (end of program).
Downlink frequency parameter data analyzing step completes on master chip, by complete for the disposable whole parsings of downlink frequency parameter data stored. Avoid switching between modem and master chip continually, improve the tuning speed of digital satellite television, convenient save time.
Above; being only presently preferred embodiments of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; the change that can readily occur in or replacement, all should be encompassed within protection scope of the present invention. Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim defines.
Claims (10)
1. a digital satellite television channel search method, it is characterised in that described method comprises the steps:
1.1 pairs of full-band downlink frequency parameters scan for, and store the downlink frequency parameter data comprising TV signal;
1.2 resolve stored downlink frequency parameter data, and store obtained channel data information.
2. digital satellite television channel search method according to claim 1, it is characterised in that described step 1.1 includes following sub-step:
2.1 arrange tuning parameter according to satellite parametric reduction, calculate downstream frequency parameter;
2.2 arrange tuner and modem related register parameter according to downstream frequency parameter;
2.3 read and analyze modem parameter, if comprising TV signal, perform step 2.4, if not comprising TV signal, perform step 2.5;
The data that 2.4 storage current downlink frequency parameters comprise;
2.5 judge whether to complete full frequency band search, if completed, carrying out step 2.6, without completing, carrying out step 2.2;
2.6 have judged whether that full downstream frequency parameter area is searched for, if be not fully complete, carry out step 2.1, if completed, proceed to downstream frequency Parameter analysis of electrochemical step.
3. digital satellite television channel search method according to claim 2, it is characterised in that described tuning parameter includes local frequency, polarity, satellite television switching switch and supplying power for tuner voltage.
4. the digital satellite television channel search method according to Claims 2 or 3, it is characterised in that the step calculating downstream frequency parameter includes:
Frequency point is set;
Local frequency and Frequency point subtract each other and obtain C-band downstream frequency parameter, and local frequency is added with Frequency point and obtains KU band downstream frequency parameter.
5. digital satellite television channel search method according to claim 2, it is characterised in that the data of downstream frequency parameter described in step 2.4 at least include Frequency point and symbol rate.
6. digital satellite television channel search method according to claim 2, it is characterised in that the satellite parametric reduction for arranging tuning parameter comes from satellite digital television receiver.
7. digital satellite television channel search method according to claim 1, it is characterised in that described step 1.2 includes following sub-step:
Stored downlink frequency parameter data in 7.1 read step 2.4;
7.2 arrange related register parameter according to described downlink frequency parameter data;
7.3 resolve downlink frequency parameter data, it may be judged whether obtain channel data information, if, carried out step 7.4, if being carried out step 7.5;
7.4 storage channel data information;
7.5 judge whether to resolve the complete downlink frequency parameter data all stored, if it is tuning EP (end of program); If otherwise carrying out step 7.1.
8. digital satellite television channel search method according to claim 7, it is characterised in that it is depositor corresponding with tuner and modem that described downlink frequency parameter data arranges the depositor of parameter.
9. digital satellite television channel search method according to claim 7, it is characterised in that the downlink frequency parameter data read in step 7.1 at least includes Frequency point and symbol rate.
10. a digital satellite television machine, it is characterised in that described television set at least includes search module, parsing module and memory module;
Search module, for downstream frequency parameter being scanned within the scope of full frequency band, obtains comprising the downlink frequency parameter data of TV signal;
Parsing module, for the downlink frequency parameter data searched is resolved, obtains channel data information;
Memory module, for the channel data information storing the downlink frequency parameter data that obtains of search and parsing obtains.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105812689B (en) * | 2014-12-29 | 2019-06-21 | 深圳Tcl数字技术有限公司 | The method and apparatus of satellite television tuning |
| CN107820121A (en) * | 2017-11-06 | 2018-03-20 | 深圳创维－Rgb电子有限公司 | Searching method, TV and the storage device of C-band satellite digital broadcasting channel |
| CN107911635B (en) * | 2017-11-21 | 2020-02-07 | 深圳创维－Rgb电子有限公司 | Satellite network scanning method based on digital television, digital television and storage device |
| CN109873965A (en) * | 2019-02-15 | 2019-06-11 | 广州视源电子科技股份有限公司 | Channel search method, device and the storage medium of satellite television |
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Address after: 266100 Zhuzhou Road, Laoshan District, Shandong, No. 151, No. Patentee after: Hisense Video Technology Co.,Ltd. Address before: 266100, 151 Zhuzhou Road, Laoshan District, Shandong, Shandong, Qingdao, Qingdao Patentee before: HISENSE ELECTRIC Co.,Ltd. |