CN103546705B - Receiver signal changing method and the receiver of correspondence - Google Patents
Receiver signal changing method and the receiver of correspondence Download PDFInfo
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- CN103546705B CN103546705B CN201310344423.0A CN201310344423A CN103546705B CN 103546705 B CN103546705 B CN 103546705B CN 201310344423 A CN201310344423 A CN 201310344423A CN 103546705 B CN103546705 B CN 103546705B
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Abstract
Present invention is disclosed the receiver of a kind of signal switching method and correspondence, this receiver includes that ground signal receives pattern and satellite signal receiving pattern, includes ground signal receiver module, satellite signal reception module and signal handover module inside it.Wherein, presetting TH T and TH S in signal handover module, wherein TH T is the error threshold that ground signal receives, and TH S is the error threshold of satellite signal receiving；Signal handover module judges the pattern that receiver runs；Ground signal receiver module generates ERR T, satellite signal reception module generates ERR S, the pattern run according to receiver, signal handover module utilizes and relatively judges receiver whether running mode switching between ERR T, TH T, ERR S, TH S, wherein ERR T represents that the accurate prediction of signal error rates that ground signal receives, ERR S represent the accurate prediction of signal error rates of satellite signal receiving.
Description
Technical field
The present invention relates to Digital TV Receiving technology, more particularly, it relates to the terrestrial DTV letter of a kind of receiver
Number with the changing method of satellite digital television signal and corresponding receiver.
Background technology
DTV, is from the collection of TV programme, is fabricated into transmitting, reception all employing digital coding and Digital Transmission
The Generation Tv of technology.DTV, not only has that capacity of resisting disturbance is strong, frequency resource utilization rate high, but also
Television image and the Video service of high-quality can be provided.At present, China's digital television business mainly includes terrestrial DTV, has
Line DTV, satellite digital TV three class.
Terrestrial DTV, is a kind of numeral electricity using the mode of ground-based wireless transmissions to realize digital television signal transmission
Depending on technology.Under ground-based wireless transmissions mode, terminal, by receiving the ground digital television signal of television tower broadcast, carries out program
Viewing.Terrestrial DTV has: high information capacity, the operator scheme of high flexible, the frequency planning of high flexible and district
Territory covers, supports multiple transmission/Internet protocol, supports the advantage such as multiple-working mode, support portable terminal device low-power consumption mode.But
It is that terrestrial DTV also brings along cliff effect and (when receiving signal strength less than a certain setting thresholding, occurs to receive signal
Interrupt phenomenon) etc. shortcoming.
Satellite digital TV, is that the television signal transmission utilizing geostationary satellite to be compressed by digital coding is to user side
A kind of radio and television form directly carrying out large area covering.Satellite digital TV has that area coverage is big, long transmission distance, letter
Capacity is big, signal quality is high, not by advantages such as geographical conditions are limited for breath.Therefore, digital video broadcast-satellite is distributed mainly on limit
The most scattered regions of population such as edge area.But, digital satellite television also has its shortcoming: exist time delay, Bandwidth-Constrained, by sky
Gas environmental effect and limited coverage rate etc..
In view of the respective pluses and minuses of terrestrial DTV and satellite digital TV and wireless good with satellite broadcasting television
Good complementary relationship, terrestrial DTV and satellite digital TV both DTV forms are united and have become as one
The trend of kind.But, when association system should perform between ground digital television signal and satellite digital television signal cut
Change and the most not yet have a criterion.
Summary of the invention
The purpose of the present invention aims to provide the changing method of a kind of ground digital television signal and satellite digital television signal
With the receiver of execution the method, solve ground signal and satellite in terrestrial DTV and satellite digital TV association system
Switching problem between signal.
According to above-mentioned purpose, implementing the receiver signal changing method of the present invention, receiver includes that ground signal receives mould
Formula and satellite signal receiving pattern, described changing method comprises the following steps: preset TH-T and TH-S in receiver, wherein
TH-T is the error threshold that ground signal receives, and TH-S is the error threshold of satellite signal receiving；Judge the mould that receiver runs
Formula；Ground signal receives schema creation ERR-T, satellite signal receiving schema creation ERR-S；The pattern run according to receiver,
Utilizing and relatively judge receiver whether running mode switching between ERR-T, TH-T, ERR-S, TH-S, wherein ERR-T represents
The accurate prediction of signal error rates that ground signal receives, ERR-S represents the accurate prediction of signal error rates of satellite signal receiving.
According to above-mentioned purpose, the receiver implementing correspondence said method of the present invention includes that ground signal receives pattern and satellite
Signal receiving modes, includes ground signal receiver module, satellite signal reception module and signal handover module inside it.Wherein,
Presetting TH-T and TH-S in signal handover module, wherein TH-T is the error threshold that ground signal receives, and TH-S is satellite letter
Number receive error threshold；Signal handover module judges the pattern that receiver runs；Ground signal receiver module generates ERR-T,
Satellite signal reception module generate ERR-S, according to receiver run pattern, signal handover module utilize ERR-T, TH-T,
Relatively judging receiver whether running mode switching between ERR-S, TH-S, wherein ERR-T represents what ground signal received
Accurate prediction of signal error rates, ERR-S represents the accurate prediction of signal error rates of satellite signal receiving.
According to above-mentioned principal character, receiver performs following operation under ground signal reception pattern: ground signal receives
Module generates ERR-T；Signal handover module judges whether ERR-T≤TH-T sets up, if setting up, maintains ground signal to receive mould
Formula；If above formula is false, then satellite signal reception module generates ERR-S；Signal handover module continues to judge ERR-S > TH-S is
No establishment, if setting up, maintains ground signal to receive pattern；If above two formulas are all false, receiver is cut by signal handover module
It is changed to satellite signal receiving pattern.
According to above-mentioned principal character, receiver performs following operation under satellite signal receiving pattern: ground signal receives
Module generates ERR-T, and satellite signal reception module generates ERR-S；Signal handover module judges ERR-S > TH-S or ERR-S >
Whether ERR-T sets up, if it is not, receiver then maintains satellite signal receiving pattern；The most then ground is switched to believe receiver
Number receive pattern.
According to above-mentioned principal character, ERR-T and ERR-S includes the error sign ratio after demapping, bit error rate, ISN or outer
The bit error rate of code decoding or Packet Error Ratio.
Have employed technical scheme, it is possible to make receiver can cut between reception ground signal and satellite-signal
Change such that it is able on to greatest extent, ensure that the digital television signal of terrestrial DTV and satellite digital tv receiver receives
Seriality.
Accompanying drawing explanation
In the present invention, identical reference represents identical feature all the time, wherein:
Fig. 1 is the part-structure schematic diagram of inventive receiver；
Fig. 2 is ground signal of the present invention and satellite-signal switching condition schematic diagram；
Fig. 3 is the concrete switching flow figure of Fig. 2.
Detailed description of the invention
Technical scheme is further illustrated below in conjunction with the accompanying drawings with embodiment.
The signal switching method of the present invention based on receive accurate prediction of signal error rates ERR(Error Rate Return) comparison, its
Middle ERR signal can be regarded as: the bit error rate of error sign ratio, bit error rate, ISN or outer code decoder after demapping or mistake
Bag rate etc..The ERR signal of the present invention includes: the accurate prediction of signal error rates ERR-T(Error Rate Return-that ground signal receives
Terrestrial) and the accurate prediction of signal error rates ERR-S(Error Rate Return-Satellite of satellite signal receiving).
Shown in Fig. 1 is the part-structure schematic diagram that inventive receiver 1 is relevant to signal switching, and receiver 1 has two kinds
Operational mode, i.e. ground signal receive pattern and satellite signal receiving pattern, respectively correspondingly face signal receiving module 2 and satellite
Signal receiving module 4.Additionally, receiver 1 is internal also sets up signal handover module 3, it is possible to call ground signal receiver module 2 He
The signal that receives of satellite signal reception module 4 performs the signal switching method of the present invention.
Specifically, error threshold TH(Threshold that the internal preset signal of signal handover module 3 receives), including ground
Error threshold TH-T(Threshold-Terrestrial that face signal receives) and error threshold TH-S of satellite signal receiving
(Threshold-Satellite).Signal handover module 3 can call ground signal receiver module 2, thus obtains ERR-T, with
And satellite signal reception module 4 can be called, thus obtain ERR-S, then by ERR-T and TH-T, ERR-S and TH-S, ERR-T and
ERR-S makes comparisons and judges that receiver 1 is the need of running mode switching.
With reference to Fig. 2, receiver 1 carries out the general thought of signal switching and is:
Reception pattern given tacit consent to by receiver 1 is that ground signal receives pattern.During the ERR-T better performances that ground signal causes
(i.e. ERR-T≤TH-T), acquiescence runs ground signal receiving modes.The ERR-T performance that the signal received when ground causes is relatively
Difference, and when the ERR-S performance of satellite-signal is the most poor (ERR-T > TH-T, and ERR-S > TH-S), remain in that acquiescence receives
Pattern, i.e. runs ground signal receiving modes.
The ERR-T poor-performing that the signal only received when ground causes, and the ERR-S performance of satellite-signal is higher
Time (ERR-S≤TH-S, and ERR-T > TH-T), receiver 1 is just switched to receive satellite-signal.
Satellite signal receiving pattern connects than the ground signal of acquiescence as the optional operational mode of one, its service condition
Receipts pattern is harsh, if the ERR-S poor-performing that satellite-signal causes, or the ERR-S performance that causes of satellite-signal not as
The ERR-T performance (i.e. ERR-S > TH-S or ERR-S > ERR-T can have at least one to set up) that face signal causes, then receiver 1
Just switch back into ground signal from satellite signal receiving pattern and receive pattern.
In order to ensure that the DTV of terrestrial DTV and satellite digital tv receiver is believed on to greatest extent
Number receive seriality, and keep signal switching be difficult to saltus step at any time, the most built-in first enumerator 5 of receiver 1 of the present invention
With the second enumerator 6, called by signal handover module 3, make the step that signal switches plus time delay.Shown in Fig. 2
The general thought of receiver 1 signal switching, detailed signal switching method is as shown in Figure 3.
Step S01: when receiver 1 is started shooting, receiver 1 enters default mode of operation, i.e. ground signal receives pattern.
Step S02: under ground signal reception pattern, ground signal receiver module 2 generates ERR-T.
Step S03: signal handover module 3 call ground signal receiver module 2 generate ERR-T, and judge ERR-T≤
Whether TH-T sets up.The most then the next state of receiver 1 remains in ground signal and receives pattern.
Step S04: if not (i.e. ERR-T > TH-T), then satellite signal reception module 4 generates ERR-S.
Step S05: signal handover module 3 calls the ERR-S that satellite signal reception module 4 generates, and judges ERR-S > TH-
Whether S sets up.The most then the next state of receiver 1 remains in ground signal and receives pattern.
Step S06: if not (i.e. ERR-S≤TH-S), then judge whether ERR-T > TH-T and ERR-S≤TH-S continuously reaches
Pre-determined number (L time such as continuously).If it is not, then the next state of receiver 1 remains in ground signal reception pattern.
Step S07: the most then receiver 1 is received pattern from ground signal and is switched to satellite-signal by signal handover module 3
Reception pattern.
Step S08: under satellite signal receiving pattern, ground signal receiver module 2 generates ERR-T, satellite signal receiving
Module 4 generates ERR-S.
Step S09: signal handover module 3 calls ground signal receiver module 2 and satellite signal reception module 4, obtains respectively
To ERR-T and ERR-S, and judge ERR-S > whether TH-S or ERR-S > ERR-T set up.If it is not, the then next state of receiver 1
Remain in satellite signal receiving pattern.
Step S10: the most then judge whether ERR-S > TH-S or ERR-S > ERR-T continuously reaches pre-determined number and (such as connect
Continuous M time).If it is not, then the next state of receiver 1 remains in satellite signal receiving pattern, the most then signal handover module 3
Receiver 1 is switched back into ground signal from satellite signal receiving pattern and receives pattern.
The counting of step S06 and step S10 is utilized respectively the first enumerator 5 and the second enumerator 6 realizes.First counting
Device 5 is set to meet ERR-T under ground signal reception pattern for calculating receiver 1 > TH-T and ERR-S≤TH-S condition
Number of times, when described number of times continuously reaches a predetermined value (such as continuously L time), signal handover module 3 by receiver 1 from ground
Signal receiving modes is switched to satellite signal receiving pattern.The set-up mode of the second enumerator 6 is in like manner.
It will be understood to one skilled in the art that, above description is only the one in the numerous embodiment of the present invention
Or several embodiments, and not use limitation of the invention.Any impartial change for embodiment described above, modification with
And it is equal to the technical schemes such as replacement, as long as meeting the spirit of the present invention, all will fall in claims of the present invention
In the range of being protected.
Claims (6)
1. a receiver signal changing method, described receiver includes that ground signal receives pattern and satellite signal receiving mould
Formula, it is characterised in that described changing method comprises the following steps:
Presetting TH-T and TH-S in receiver, wherein TH-T is the error threshold that ground signal receives, and TH-S is satellite-signal
The error threshold received；
Judge the pattern that receiver runs；
Ground signal receives schema creation ERR-T, satellite signal receiving schema creation ERR-S；The pattern run according to receiver,
Utilizing and relatively judge receiver whether running mode switching between ERR-T, TH-T, ERR-S, TH-S, wherein ERR-T represents
The accurate prediction of signal error rates that ground signal receives, ERR-S represents the accurate prediction of signal error rates of satellite signal receiving,
Wherein, the judgement step under described ground signal reception pattern is:
Generate ERR-T；
Judging whether ERR-T≤TH-T sets up, if setting up, maintaining ground signal to receive pattern；
If being false, then generate ERR-S；
Continue to judge ERR-S whether TH-S sets up, if establishment, maintains ground signal to receive pattern；
If being false, then receiver switches to satellite signal receiving pattern.
2. receiver signal changing method as claimed in claim 1, it is characterised in that under described satellite signal receiving pattern
Judge that step is:
Generate ERR-T and ERR-S；
Judge ERR-S > whether TH-S or ERR-S > ERR-T set up；If it is not, then maintain satellite signal receiving pattern；The most then cut
It is changed to ground signal and receives pattern.
3. receiver signal changing method as claimed in claim 1, it is characterised in that described ERR-T and ERR-S includes that solution is reflected
The bit error rate of error sign ratio, bit error rate, ISN or outer code decoder after penetrating or Packet Error Ratio.
4. a receiver, includes ground signal receiver module, satellite signal reception module and signal handover module, institute inside it
State ground signal receiver module corresponding ground signal receiving modes, described satellite signal reception module correspondence satellite signal receiving mould
Formula, it is characterised in that:
Presetting TH-T and TH-S in signal handover module, wherein TH-T is the error threshold that ground signal receives, and TH-S is satellite
The error threshold that signal receives；
Described signal handover module judges the pattern that receiver runs；
Ground signal receiver module generates ERR-T, and satellite signal reception module generates ERR-S；The pattern run according to receiver,
Signal handover module utilizes and relatively judges receiver whether running mode switching between ERR-T, TH-T, ERR-S, TH-S,
Wherein ERR-T represents the accurate prediction of signal error rates that ground signal receives, and ERR-S represents the accurate prediction of signal error rates of satellite signal receiving,
Wherein, described receiver performs to operate as follows under ground signal reception pattern:
Described ground signal receiver module generates ERR-T；
Described signal handover module judges whether ERR-T≤TH-T sets up, if setting up, maintains ground signal to receive pattern；
If being false, then satellite signal reception module generates ERR-S；
Signal handover module continues to judge ERR-S > whether TH-S sets up, if establishment, maintains ground signal to receive pattern；
If being false, receiver is switched to satellite signal receiving pattern by signal handover module.
5. receiver as claimed in claim 4, it is characterised in that described receiver performs such as under satellite signal receiving pattern
Lower operation:
Ground signal receiver module generates ERR-T, and satellite signal reception module generates ERR-S；
Signal handover module judges ERR-S > whether TH-S or ERR-S > ERR-T set up, if it is not, then maintain satellite to believe receiver
Number receive pattern；Receiver the most then switch to ground signal receive pattern.
6. receiver as claimed in claim 4, it is characterised in that described ERR-T and ERR-S includes the erratum number after demapping
The bit error rate of rate, bit error rate, ISN or outer code decoder or Packet Error Ratio.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310344423.0A CN103546705B (en) | 2013-08-09 | 2013-08-09 | Receiver signal changing method and the receiver of correspondence |
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| CN201310344423.0A CN103546705B (en) | 2013-08-09 | 2013-08-09 | Receiver signal changing method and the receiver of correspondence |
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| CN103546705B true CN103546705B (en) | 2016-12-28 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1697499A (en) * | 2004-05-12 | 2005-11-16 | 三星电子株式会社 | Apparatus and method for receiving digital multimedia broadcasting in a wireless terminal |
| CN1980399A (en) * | 2005-12-05 | 2007-06-13 | 三星电子株式会社 | Apparatus and method for providing digital multimedia breadcasting service in area of weak current |
| CN101521769A (en) * | 2009-04-15 | 2009-09-02 | 四川长虹电器股份有限公司 | System for simultaneously receiving ground wave and satellite digital television |
| EP2400750A1 (en) * | 2009-02-23 | 2011-12-28 | Panasonic Corporation | Television receiver |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3877991B2 (en) * | 2001-10-01 | 2007-02-07 | パイオニア株式会社 | Receiver |
| KR100724980B1 (en) * | 2005-06-28 | 2007-06-04 | 삼성전자주식회사 | Dual mode DMB terminal capable of receiving satellite DMB and terrestrial DMB simultaneously |
-
2013
- 2013-08-09 CN CN201310344423.0A patent/CN103546705B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1697499A (en) * | 2004-05-12 | 2005-11-16 | 三星电子株式会社 | Apparatus and method for receiving digital multimedia broadcasting in a wireless terminal |
| CN1980399A (en) * | 2005-12-05 | 2007-06-13 | 三星电子株式会社 | Apparatus and method for providing digital multimedia breadcasting service in area of weak current |
| EP2400750A1 (en) * | 2009-02-23 | 2011-12-28 | Panasonic Corporation | Television receiver |
| CN101521769A (en) * | 2009-04-15 | 2009-09-02 | 四川长虹电器股份有限公司 | System for simultaneously receiving ground wave and satellite digital television |
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Address after: Room 1018, block B, No. three East Bridge Road, Pudong New Area, Shanghai, 200125, China Applicant after: Shanghai NERC-DTV National Engineering Research Center Co., Ltd. Address before: 200125 Shanghai East Road, Pudong New Area, No. three, No. 1018 Applicant before: Shanghai NERC-DTV National Engineering Research Center Co., Ltd. |
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Inventor after: Xiong Jian Inventor after: Yang Hua Inventor after: Lu Jingkan Inventor after: Gui Lin Inventor after: Liu Bo Inventor before: Xiong Jian Inventor before: Yang Hua Inventor before: Lu Jingkan Inventor before: Gui Lin Inventor before: Liu Bo Inventor before: Ma Wenfeng |
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