CN108259980A - A kind of dynamic signal search method - Google Patents
A kind of dynamic signal search method Download PDFInfo
- Publication number
- CN108259980A CN108259980A CN201711474915.6A CN201711474915A CN108259980A CN 108259980 A CN108259980 A CN 108259980A CN 201711474915 A CN201711474915 A CN 201711474915A CN 108259980 A CN108259980 A CN 108259980A
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- search
- acquisition frequency
- symbol rate
- range
- scanned
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4383—Accessing a communication channel
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
The present invention relates to programme signal search technique field more particularly to a kind of dynamic signal search methods, include the following steps：Determine symbol rate and fundamental acquisition frequency；The adjustment of range is scanned for according to symbol rate and obtains search range；It is scanned for successively with reference to fundamental acquisition frequency, fundamental acquisition frequency left avertence and fundamental acquisition frequency right avertence；If searching for successfully, stop search.The goal of the invention of the present invention is to provide a kind of dynamic signal search method, and technical solution provided by the invention improves the accuracy of Signal Regulation, reduces user and is accidentally locked to other channels or the probability that can not be logged on to a TV channel.
Description
Technical field
The present invention relates to programme signal search technique field more particularly to a kind of dynamic signal search methods.
Background technology
DVB-S2, will also be big while original transmission capacity is promoted as new-generation digital satellite broadcast standard
The big range that branches out, has obtained the extensive concern in the fields such as broadcasting and TV, telecommunications, computer.Service range includes broadcasting service
(BS), the interactive services such as digital news gathering (DSNG), data distribution/relaying and Internet accesses.
DVB-S2 decoders carry out the locking of signal before programme signal is received, need to be on the basis of specific frequency certain
It is adjusted in search range, according to fixed search range, it may appear that error lock to other signals can not lock
The situation of channel.
Invention content
The present invention goal of the invention be to provide a kind of dynamic signal search method, technical solution provided by the invention carries
The high accuracy of Signal Regulation, reduces user and is accidentally locked to other channels or the probability that can not be logged on to a TV channel.
In order to reach foregoing invention purpose, the present invention provides a kind of dynamic signal search method, includes the following steps：
1) symbol rate and fundamental acquisition frequency, are determined；
2) adjustment of range, is scanned for according to symbol rate and obtains search range；
3) it, is scanned for successively with reference to fundamental acquisition frequency, fundamental acquisition frequency left avertence and fundamental acquisition frequency right avertence；
If 4), search for successfully, stop search.
Preferably, the adjustment of range is scanned for symbol rate in step 2, search rate value is not more than symbol rate value.
From the foregoing, it will be observed that following advantageous effect can be obtained using the present invention：The present invention adjusts search range according to symbol rate,
The method for taking stage Search simultaneously, steps up search range, improves the accuracy of Signal Regulation, reduces user's false-lock and determines
To other channels or the probability that can not be logged on to a TV channel.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the present invention will be implemented below
Attached drawing is briefly described needed in the description of example or the prior art.It should be evident that the accompanying drawings in the following description
Only part of the embodiment of the invention, for those of ordinary skill in the art, in not making the creative labor property
Under the premise of, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is flow diagram of the embodiment of the present invention.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes.Obviously, described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
DVB-S2 decoders carry out the locking of signal before programme signal is received, need to be on the basis of specific frequency certain
It is adjusted in search range, according to fixed search range, it may appear that error lock to other signals can not lock
The situation of channel.
In order to solve the above-mentioned technical problem, the present embodiment provides a kind of dynamic signal search method, this method is according to symbol
Number rate adjustment search range, while the method for taking stage Search, step up search range.
Fig. 1 is referred to, specifically, signal search method provided in this embodiment, includes the following steps：
1) symbol rate and fundamental acquisition frequency, are determined；
2) adjustment of range, is scanned for according to symbol rate and obtains search range；
3) it, is scanned for successively with reference to fundamental acquisition frequency, fundamental acquisition frequency left avertence and fundamental acquisition frequency right avertence；
If 4), search for successfully, stop search.
Wherein, in step 1, symbol rate and fundamental acquisition frequency are set by user oneself.
In step 2, the adjustment of range is scanned for symbol rate, the method adjusted at present is obtained according to experimental data
Optimum efficiency value.Specific method of adjustment is that search rate value is not more than symbol rate value, for example, symbol rate is 1Mbps, then
Search range is no more than 1MHz.
The searching method includes searching for three times, carries out first time search with reference to fundamental acquisition frequency for the first time；If success,
It stops search；If search failure, fundamental acquisition frequency scans for the shifting of frequency left avertence, then carries out second and searches for；If into
Work(then stops search；If second of search still fails, fundamental acquisition frequency scans for frequency right avertence, carries out third time and searches
Rope.In frequency shifting process, deviation range can flexibly be set, such as 5MHz.
Searching method provided in this embodiment adjusts search range, while the method for taking stage Search according to symbol rate,
Search range is stepped up, improves the accuracy of Signal Regulation, user is reduced and is accidentally locked to other channels or can not lock
The probability of channel.
Embodiments described above does not form the restriction to the technical solution protection domain.It is any in above-mentioned implementation
Modifications, equivalent substitutions and improvements made within the spirit and principle of mode etc., should be included in the protection model of the technical solution
Within enclosing.
Claims (2)
- A kind of 1. dynamic signal search method, it is characterised in that：Include the following steps：1), user sets symbol rate and fundamental acquisition frequency；2) adjustment of range, is scanned for according to symbol rate and obtains search range；3) it, is scanned for successively with reference to fundamental acquisition frequency, fundamental acquisition frequency left avertence and fundamental acquisition frequency right avertence；If 4), search for successfully, stop search.
- 2. a kind of dynamic signal search method according to claim 1, it is characterised in that：In step 2 to symbol rate The adjustment of range is scanned for, search rate value is not more than symbol rate value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711474915.6A CN108259980A (en) | 2017-12-29 | 2017-12-29 | A kind of dynamic signal search method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711474915.6A CN108259980A (en) | 2017-12-29 | 2017-12-29 | A kind of dynamic signal search method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108259980A true CN108259980A (en) | 2018-07-06 |
Family
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| CN201711474915.6A Pending CN108259980A (en) | 2017-12-29 | 2017-12-29 | A kind of dynamic signal search method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111049603A (en) * | 2018-10-12 | 2020-04-21 | 华讯方舟科技有限公司 | Satellite signal strength detection method and device |
| CN114697590A (en) * | 2022-03-01 | 2022-07-01 | 深圳创维－Rgb电子有限公司 | Channel searching method, system, intelligent terminal and computer readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111049603A (en) * | 2018-10-12 | 2020-04-21 | 华讯方舟科技有限公司 | Satellite signal strength detection method and device |
| CN114697590A (en) * | 2022-03-01 | 2022-07-01 | 深圳创维－Rgb电子有限公司 | Channel searching method, system, intelligent terminal and computer readable storage medium |
| CN114697590B (en) * | 2022-03-01 | 2024-04-30 | 深圳创维－Rgb电子有限公司 | Channel searching method, system, intelligent terminal and computer readable storage medium |
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Application publication date: 20180706 |