CN1303811C - Searching method for TV programme signal - Google Patents
Searching method for TV programme signal Download PDFInfo
- Publication number
- CN1303811C CN1303811C CNB2004100657522A CN200410065752A CN1303811C CN 1303811 C CN1303811 C CN 1303811C CN B2004100657522 A CNB2004100657522 A CN B2004100657522A CN 200410065752 A CN200410065752 A CN 200410065752A CN 1303811 C CN1303811 C CN 1303811C
- Authority
- CN
- China
- Prior art keywords
- frequency
- platform
- searching
- station
- increased
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The present invention relates to a searching method for TV program signals. Initial frequency is sent to a tuner, an AFT value is detected after the waiting of normal time (A), and whether a station is formed in the position is synchronously judged in auxiliary lines; if true, then preserving the station frequency; at this point, the frequency is increased by 3 to 4MHz, and a period of time (B) is delayed to judge whether a station exists; if false, then frequency is increased by 50KHz, and whether a station exists is judged after a short time delay (C); the steps that frequency is increased by 3 to 4MHz when the station exists and is increased by 50KHz when a station does not exist are repeatedly carried out, and whether signal procedures exist are detected until the frequency reaches the ultimate frequency, and the searching stops. A new method is used for searching TV program signals, and 60 to 70 seconds are generally needed for searching from 44.75MHz to 961MHz without the problem of a frequency list; the present invention can be generally used in areas with different frequency lists.
Description
Technical field
The present invention relates to the searching method of TV programme signal, i.e. the channel search method of television set.
Background technology
The program search of television set is the work that the television set design must be finished, because the characteristics of himself, the scope of its search is from the big frequency bandwidth of 40M-950M, exist several big problems is difficult to solve always: the searching method of existing TV programme signal adopts the frequency interval of the 8M broads such as (according to some differences of frequency meter) that goes forward one by one to search for, because the characteristic of tuner, frequency setting needs the long period, (each every reaction plus signal detection time of tuner will above 1 second).Therefore following weak point is arranged:
1, it is slow to search platform speed, generally searches out MHz more than 960 from MHz more than 40 at present, generally needs more than 3 minutes, and speed is also wanted more than 2 minutes faster.
2, to the tuner of frequency synthesis, also there is the problem of a frequency meter when searching platform, to revise toward contact its program of different frequency meters, can bring great inconvenience in actual use.Also can produce Lou platform problem because of the TV signal of the non-standard frequency of some local transmission.
3, existing method is to search for the frequency interval of broad, often has the problem of searching more or searching less, produces false platform and leaks platform.
Summary of the invention
The objective of the invention is: a kind of searching method of TV programme signal is provided, and it is fast that it searches platform speed; Satisfy any frequency meter, need not to revise at the different frequency list procedure; The object of the invention also is: can not produce leakage platform, also be difficult for producing false platform.
The object of the present invention is achieved like this: the searching method of TV programme signal, and (as 44.75MHz) gives tuner with initial frequency, after the wait through normal time (A), detects AFT value, and is aided with and capablely synchronously judges whether this place has platform; If platform is arranged, preserve this frequency, frequency adds 3～4MHz, and delays time a bit of time (B), has judged whether platform; If no platform, frequency adds 50KHz, behind utmost point short time delay (C), has judged whether platform; Repeat to stop search as if platform being arranged, stopping frequency (as 961MHz) if the program of no platform reaches up to frequency.
The present invention analyzes channel search method and according to the characteristics of tuner, TV signal, creating a kind of channel search method can overcome the above problems very effectively, frequency interval short as 50KHz the time, the tuner reaction speed is exceedingly fast, behind utmost point short time delay (C), judged whether platform again.The actual proving effect that uses is better, does not leak platform, and search time is also shorter.
Description of drawings
When being search, Fig. 1 detects the schematic diagram of AFT value
Embodiment
1, gives tuner with initial frequency (as 44.75MHz), after the wait through normal time (A);
2, detect AFT value, as Fig. 1, suppose that A is a channel place frequency, the AFT value, and is aided with and capablely synchronously judges whether this place has platform to the platform that expressed possibility between the C at B;
3, if platform is arranged, preserve this frequency, frequency adds 3-4MHz, and delays time a bit of time (B), changes 2;
4, as if no platform, frequency adds 50KHz, behind utmost point short time delay (C), changes 2;
5, repetition 2～4 reaches up to frequency and stops frequency (as 961MHz), stops search.
The present invention has some relatively more crucial:
1, the value A of top three kinds of stand-by period the longest (600～800 milliseconds), B lack (about 20 milliseconds), and C extremely lacks (about 1 millisecond);
When 2, machine is debugged, import the signal of a given frequency, simultaneously this frequency is sent into tuner, regulate AFT voltage, write down this AFT value as searching the platform reference value to signal the best;
3, judged whether platform, detected the AFT value earlier, determined according near AFT indicatrix platform is arranged whether this place has platform,, judged by the row synchronous detecting whether this place really has platform again if having platform.
Adopt new method to search platform, search out 961MHz from 44.75MHz, generally need 60～70 seconds (platforms about 40, it is influential to time length how many platforms counts, the time was about 100 seconds most during all no platform), and do not have the problem of frequency meter, and can be general to the area of different frequency table, in the actual problem of searching more or searching less that exists hardly when searching platform.
Claims (1)
1, the searching method of TV programme signal is given tuner with initial frequency, through 600-800ms normal time A wait after, detect AFT value, and be aided with and capablely synchronously judge whether this place has platform; If platform is arranged, preserve this frequency, it is characterized in that this moment frequency being added 3-4MHz, and a bit of time B of time-delay 20ms, judged whether platform; If no platform, frequency adds 50KHz, behind the utmost point short time delay C of 1ms, has judged whether platform; Repeat above-mentioned if frequency adds 3-4MHz when platform is arranged, if frequency adds 50KHz and whether detection has the program of signal to reach the termination frequency up to frequency during no platform, stop search.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100657522A CN1303811C (en) | 2004-11-16 | 2004-11-16 | Searching method for TV programme signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100657522A CN1303811C (en) | 2004-11-16 | 2004-11-16 | Searching method for TV programme signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1610390A CN1610390A (en) | 2005-04-27 |
| CN1303811C true CN1303811C (en) | 2007-03-07 |
Family
ID=34764789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100657522A Expired - Fee Related CN1303811C (en) | 2004-11-16 | 2004-11-16 | Searching method for TV programme signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1303811C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100468971C (en) * | 2005-06-03 | 2009-03-11 | 鸿富锦精密工业（深圳）有限公司 | Method for scanning channels |
| US20070098020A1 (en) * | 2005-10-27 | 2007-05-03 | Yee Ja | Methods and arrangements to model an asynchronous interface |
| CN101753919B (en) * | 2008-12-17 | 2012-09-05 | 康佳集团股份有限公司 | Method for increasing automatic frequency point tracking range of TV |
| CN101668147B (en) * | 2009-09-10 | 2011-05-11 | 青岛海信电器股份有限公司 | Cable TV channel searching method and television |
| CN102510459A (en) * | 2011-10-18 | 2012-06-20 | 深圳Tcl新技术有限公司 | Digital television channel search method and digital television |
| CN102761720A (en) * | 2012-07-30 | 2012-10-31 | 深圳乐投卡尔科技有限公司 | Method for searching program by simulating television of vehicle-mounted Android platform |
| CN107888855A (en) * | 2017-11-14 | 2018-04-06 | 四川长虹电器股份有限公司 | The method of simulated television tuning |
| CN108111788B (en) * | 2017-12-20 | 2021-03-30 | 深圳Tcl新技术有限公司 | Television non-standard signal processing method and device and computer readable storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1340242A (en) * | 1999-12-16 | 2002-03-13 | 皇家菲利浦电子有限公司 | Speed up search tuning in television receivers |
| CN1463142A (en) * | 2003-06-02 | 2003-12-24 | 海信集团有限公司 | Changeable tabulation typed high-speed method for searching TV stations in full range |
| JP2004104592A (en) * | 2002-09-11 | 2004-04-02 | Toshiba Corp | Broadcast receiving apparatus and method therefor |
-
2004
- 2004-11-16 CN CNB2004100657522A patent/CN1303811C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1340242A (en) * | 1999-12-16 | 2002-03-13 | 皇家菲利浦电子有限公司 | Speed up search tuning in television receivers |
| JP2004104592A (en) * | 2002-09-11 | 2004-04-02 | Toshiba Corp | Broadcast receiving apparatus and method therefor |
| CN1463142A (en) * | 2003-06-02 | 2003-12-24 | 海信集团有限公司 | Changeable tabulation typed high-speed method for searching TV stations in full range |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1610390A (en) | 2005-04-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1303811C (en) | Searching method for TV programme signal | |
| CN103197770B (en) | A kind of method and device of TV remote controller analog mouse operation | |
| CN107422223B (en) | A kind of method of distribution small current grounding fault positioning | |
| CN111929553B (en) | Partial discharge positioning method based on phase velocity frequency-varying characteristics | |
| CN109474359A (en) | A kind of frequency sweeping method and terminal device | |
| CN102981954A (en) | Compatibility test method for input method and electronic device | |
| CN111929532A (en) | 10kV distribution cable intermediate joint positioning method | |
| CN105812080A (en) | Radio signal automatic searching device and method and frequency modulation radio | |
| CN106055177B (en) | A kind of scan method and device of infrared touch panel | |
| CN108548578A (en) | A kind of ultrasonic echo signal characteristic peak recognition methods based on adaptive threshold | |
| CN103777821A (en) | Anti-interference method and device for touch system | |
| CN101212607B (en) | Automatic channel search method for TV set | |
| CN101304479A (en) | Method and apparatus for detecting motion in video sequence | |
| CN103747174A (en) | Multi-target free focusing method and application apparatus thereof | |
| CN1036419C (en) | Method and apparatus for automatically measuring distance of fault in power cable | |
| CN108890063A (en) | A kind of control method of crest welder, device, crest welder and storage medium | |
| CN105759250B (en) | A kind of segment processing method suitable for impulse radar CFAR detection | |
| CN109586815B (en) | Signal preset control method and system among multiple receiver devices | |
| CN104459392B (en) | Intelligent scanning measuring method in vector network analyzer | |
| CN100346160C (en) | Method of real time tracking bottom echo for ultrasonic crank detection gate | |
| CN107302714A (en) | A kind of switching method and apparatus of mapped file | |
| CN114113894A (en) | Repetitive fault identification method based on natural frequency characteristics | |
| CN106454520A (en) | An information source switching control method and apparatus | |
| CN105091761A (en) | Sample form monitoring device and method | |
| CN1202617C (en) | Intelligent meter set signal identifying method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070307 Termination date: 20101116 |