CN101668147A - Cable TV channel searching method and television - Google Patents
Cable TV channel searching method and television Download PDFInfo
- Publication number
- CN101668147A CN101668147A CN200910161992A CN200910161992A CN101668147A CN 101668147 A CN101668147 A CN 101668147A CN 200910161992 A CN200910161992 A CN 200910161992A CN 200910161992 A CN200910161992 A CN 200910161992A CN 101668147 A CN101668147 A CN 101668147A
- Authority
- CN
- China
- Prior art keywords
- frequency values
- synchronizing signal
- described frequency
- detect
- increase
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 claims description 2
- 230000000750 progressive effect Effects 0.000 abstract 1
- 230000000875 corresponding effect Effects 0.000 description 26
- 230000003068 static effect Effects 0.000 description 9
- 239000000969 carrier Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Images
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The embodiment of the invention provides a cable TV channel searching method and a television, relating to the field of television. The invention can perform the characteristic of frequency table fixing and high channel searching speed and does not have the problem of missing channels. The cable TV channel searching method provided by the embodiment of the invention comprises: according to the frequency table, carrying out frequency value progressive increase setting and searching channels; when setting the frequency value corresponding to a certain channel, increasing or reducing the frequency value if no synchronization signal of the frequency value is detected; and detecting whether the increased or reduced frequency value has a synchronization signal or not again. The embodiment of theinvention is applied to searching channels of the cable TV.
Description
Technical field
The present invention relates to field of television, relate in particular to a kind of cable TV channel search method and television set.
Background technology
Prior art mainly contains two kinds of methods for search platform under cable TV network:
A kind of method is to search platform by three frequency meters of standard (standard)/HRC (harmonically related carriers)/IRC (correlated carrier wave at interval), and the Frequency point action only is set, and when not having synchronizing signal on the Frequency point that is provided with, then thinking does not have channel.
In carrying out this process of searching platform, the inventor finds: this way is provided with the frequency action according to frequency meter fully, does not carry out the compatible measure of possible frequency shift (FS), so, if frequency values does not meet the frequency meter requirement, platform then may appear leaking.
Another kind method is that full rate increases progressively and searches platform, searches highest frequency from the low-limit frequency of tuner support always.
In carrying out this process of searching platform, the inventor finds: the full rate search, can solve the leakage platform problem that frequency shift (FS) may exist, but it is slow to search platform speed.At the fixing characteristics of the frequency meter in some market, do not have and to make full use of.
Summary of the invention
Embodiments of the invention provide cable TV channel search method and television set, can bring into play the fixing characteristics of frequency meter, and it is fast to search platform speed, and the platform problem can not occur leaking.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of cable TV channel search method comprises:
Increase progressively setting according to frequency meter and search platform;
After a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then increase or reduce described frequency values, and detect once more increase or reduce after described frequency values whether synchronizing signal is arranged.
It is described after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then increase or reduce described frequency values, and detect to increase once more or reduce after described frequency values whether synchronizing signal is arranged, comprise: after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then increase described frequency values, whether the described frequency values that detects after increasing has synchronizing signal, if still do not have, then reduce described frequency values, and whether the described frequency values that detects after reducing there is synchronizing signal; Perhaps, after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then reduce described frequency values, whether the described frequency values after detection reduces has synchronizing signal, if still do not have, then increase described frequency values, and whether the described frequency values that detects after increasing there is synchronizing signal.
It is described after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then increase or reduce described frequency values, and detect to increase once more or reduce after described frequency values whether synchronizing signal is arranged, comprise: after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then repeatedly increase or reduce described frequency values, and to each increase or the described frequency values after reducing detect, detect whether synchronizing signal is arranged.
Described increase or the deviant that reduces are smaller or equal to default peak excursion value.
If after described channel frequency value corresponding increases or reduces described peak excursion value, still do not detect synchronizing signal, determine that then described channel does not have signal.
A kind of television set comprises:
Search module is used for increasing progressively setting according to frequency meter and searches platform;
The frequency shift (FS) module is used for not detecting the synchronizing signal of described frequency values after a certain channel frequency value corresponding is set, and then increases or reduce described frequency values;
Described search module, also be used for detecting once more increase or reduce after described frequency values whether synchronizing signal is arranged.
Described frequency shift (FS) module also is used for not detecting the synchronizing signal of described frequency values after a certain channel frequency value corresponding is set, and then increases described frequency values;
Described search module, whether the described frequency values that also is used to detect after the increase has synchronizing signal;
Described frequency shift (FS) module if the described frequency values that also is used for still not detecting after the increase has synchronizing signal, then reduces described frequency values;
Described search module, whether the described frequency values that also is used to detect after reducing has synchronizing signal;
Perhaps, described frequency shift (FS) module also is used for not detecting the synchronizing signal of described frequency values after a certain channel frequency value corresponding is set, and then reduces described frequency values;
Described search module, whether the described frequency values that also is used to detect after reducing has synchronizing signal;
Described frequency shift (FS) module if the described frequency values that also is used for still not detecting after reducing has synchronizing signal, then increases described frequency values;
Described search module, whether the described frequency values that also is used to detect after the increase has synchronizing signal.
It is described after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then increase or reduce described frequency values, and detect to increase once more or reduce after described frequency values whether synchronizing signal is arranged, comprise: after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then repeatedly increase or reduce described frequency values, and to each increase or the described frequency values after reducing detect, detect whether synchronizing signal is arranged.
Described increase or the deviant that reduces are smaller or equal to default peak excursion value.
If after described channel frequency value corresponding increases or reduces described peak excursion value, still do not detect synchronizing signal, determine that then described channel does not have signal.
Cable TV channel search method and television set that the embodiment of the invention provides increase progressively setting according to frequency meter and search platform; After a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then increase or reduce described frequency values, and detect once more increase or reduce after this frequency values whether synchronizing signal is arranged.Like this, promptly utilized the characteristics of frequency meter, search speed is fast, has had non-standard signal compatible, for the inclined to one side signal of frequency values, excellent adaptability is arranged, and can avoid the leakage platform that causes because of frequency is non-standard.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The FB(flow block) of the cable TV channel search method that Fig. 1 provides for the embodiment of the invention;
The schematic flow sheet of the cable TV channel search method that Fig. 2 provides for the embodiment of the invention;
The structured flowchart of the television set that Fig. 3 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The cable TV channel search method that the embodiment of the invention provides, as shown in Figure 1, this method step comprises:
S101, increase progressively to be provided with according to frequency meter and search platform.
S102, after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of this frequency values, then increase or reduce this frequency values, and detect once more increase or reduce after this frequency values whether synchronizing signal is arranged.
Concrete, step S102 can for:
After a certain channel value frequency value corresponding is set, do not detect the synchronizing signal of this frequency values, then increase this frequency values, whether the frequency values that detects after increasing has synchronizing signal, if still do not have, then reduce this frequency values again, whether this frequency values that detects after reducing has synchronizing signal.
Perhaps, after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of this frequency values, then reduce this frequency values, whether this frequency values that detects after reducing has synchronizing signal, if still do not have, then increase this frequency values again, whether the frequency values that detects after increasing has synchronizing signal.
Certainly whether, also can repeatedly increase or reduce this frequency values, and each increase or the frequency values that reduces are detected, detecting has synchronizing signal.
In embodiments of the present invention, can suppose the deviant that increases or reduce, if after increasing or reducing this peak excursion value, still not detecting this frequency values has synchronizing signal, can think that then this channel does not have signal smaller or equal to default peak excursion value.The peak excursion value here can be decided according to the frequency shift (FS) concrete condition of various places.
The cable TV channel search method that the embodiment of the invention provides increases progressively setting according to frequency meter and searches platform; After a certain channel frequency value corresponding is set, do not detect the synchronizing signal of this frequency values, then increase or reduce this frequency values, and detect once more increase or reduce after this frequency values whether synchronizing signal is arranged.Like this, promptly utilized the characteristics of frequency meter, search speed is fast, has had non-standard signal compatible, for the inclined to one side signal of frequency values, excellent adaptability is arranged, and can avoid the leakage platform that causes because of frequency is non-standard.
The cable TV channel search method that another embodiment of the present invention provides, searching platform with the frequency meter in reference South America is that example describes, the frequency meter in South America very important characteristic is exactly that frequency meter is fixed, each channel frequency value corresponding has all had regulation, and all TV stations all carry out modulation signal according to the frequency meter of South America standard.
Concrete frequency meter such as table 1:
Table 1, South America frequency meter
According to table 1 as can be seen, the frequency values in South America all is relatively-stationary, can calculate by computing formula.Such advantage is: need not the frequency hunting action that there is no need when searching platform, shorten and search the platform time.Can see also that in addition CABLE (cable TV) lower frequency value is divided into three kinds of different situations of Standard/HRC/IRC.
Simultaneously, see according to the actual field in South America is surveyed the result that the Frequency point of the actual channel in South America is not that complete definition according to last table provides, there is the phenomenon of frequency shift (FS) in indivedual channels.The frequency shift (FS) of indivedual channels has reached 1.5MHZ.This has also determined, according to Standard/HRC/IRC the frequency action is set fully, has the risk of leaking platform.
At The above results, in the present embodiment, suppose that the peak excursion value is 1.6MHZ, when the channel frequency value corresponding of a certain setting does not detect synchronizing signal, increase or reduce 800KHZ earlier, detect; If still do not have,,, can assert that then this channel does not have signal if also do not have increasing or reducing 1.6MHZ.
Concrete, as shown in Figure 2, this method step comprises:
S201, when carrying out under the Cable automatic channel search action, 1 channel under the Cable at first, tuner is set to the frequency values of 1 channel under the cable.
S202, detect this frequency values whether synchronizing signal is arranged,, then enter step S203,, then enter step S204 if there is not synchronizing signal if synchronizing signal is arranged.
S203, this frequency values have synchronizing signal to illustrate that this channel has modulation signal, read AFC (AutomaticFrequency Control, automatic frequency control) value, state according to the AFC value, determine the optimum frequency point, and finish the hunting action of this channel, the relevant information of storing this channel.Forward step S208 to.
S204, the standard frequency values of current channel correspondence is reduced 800KHZ, detect whether synchronizing signal is arranged,, then forward step S203 to,, then forward step S205 to if there is not synchronizing signal if synchronizing signal is arranged.
S205, the standard frequency values of current channel correspondence is increased 800KHZ, detect whether synchronizing signal is arranged,, then forward step S203 to,, then forward step S206 to if there is not synchronizing signal if synchronizing signal is arranged.
S206, the standard frequency values of current channel correspondence is reduced 1.6MHZ, detect whether synchronizing signal is arranged,, then forward step S203 to,, then forward step S207 to if there is not synchronizing signal if synchronizing signal is arranged.
S207, the standard frequency values of current channel correspondence is increased 1.6MHZ, detect whether synchronizing signal is arranged,, then forward step S203 to,, then forward step S208 to if there is not synchronizing signal if synchronizing signal is arranged.
S208, judge whether to be highest channel number, if, then finish to search the platform action, if not, then channel is added 1, calculate the frequency values of standard, be written to then in the tuner, forward step S202 to, carry out the platform process of searching of next program.
Increase progressively setting according to frequency meter and search platform; After a certain channel frequency value corresponding is set, do not detect the synchronizing signal of this frequency values, then increase or reduce this frequency values, and detect once more increase or reduce after this frequency values whether synchronizing signal is arranged.Like this, promptly utilized the characteristics of frequency meter, search speed is fast, has had non-standard signal compatible, for the inclined to one side signal of frequency values, excellent adaptability is arranged, and can avoid the leakage platform that causes because of frequency is non-standard.
Above-mentioned steps can utilize computer to carry out automatically, and its partial code can be exemplified below:
void?msAPI_Tuner_TuningProcessor(eAFTSTEP?eState)
{
static?AUTO_SEARCH_TYPE?eAutoSearchType；
static?U8u8VideoStableCount；
static?U8u8ScanOffsetCnt；
static?U8u8StatusTemp；
static?U8u8PreAFT；
static?U8u8StartFrom；
static?U16u16PreviosTunerPLL；
static?BOOLEAN?bFirstDetect；
static?BOOLEAN?bIsSignalExist；
if(eState！＝AFT_EXT_STEP_PERIODIC)
{
if(_eCurrentTuningState＝＝AFT_IDLE&&eState＝＝AFT_EXT_STEP_SEARCHSTOP)
{
return；
}
if(eState＝＝AFT_TUNING_SUSPEND)
{
_IsTuningSuspend＝TRUE；
return；
}
else?if(eState＝＝AFT_TUNING_RESUME)
{
_IsTuningSuspend＝FALSE；
return；
}
_eCurrentTuningState＝eState；
_u16TuningWaitTimer＝WAIT_0ms；
_IsTuningSuspend＝FALSE；
}
if(_eCurrentTuningState！＝AFT_IDLE)
{
if(_IsTunerStable()＝＝FALSE)
return；
}
if(_IsTuningSuspend＝＝TRUE)
return；
switch(_eCurrentTuningState)
{
default:break；
case?AFT_IDLE：
_u16IdleTimer++；
if(_u16IdleTimer＞＝WAIT_MAXms)
_u16IdleTimer＝WAIT_10ms；
if((_u16IdleTimer％WAIT_190ms)＝＝0)
{
if(E_VIDEOSOURCE_ATV！＝msAPI_VD_GetVideoSource()
‖(E_VIDEOSOURCE_ATV＝＝msAPI_VD_GetVideoSource()&&TRUE＝＝
msAPI_VD_IsAutoAVActive(E_AUTOAV_SORUCE_ALL))
‖IS_RT_AFT_ENABLED＝＝FALSE
‖FALSE＝＝_bIsAFTNeeded)
{
return；
}
_msAPI_Tuning_AutoFineTuning(MDrv_IFDM_GetFreqDev())；
}
return；
case?AFT_EXT_STEP_SEARCHALL：
TVAVDelay(DELAY_FOR_ENTERING_MUTE)；
msAPI_AUD_AdjustAudioFactor(E_ADJUST_AUDIOMUTE，E_AUDIO_INTERNAL_2_MUTEON，E_AUDIO
MUTESOURCE_ATV)；
eAutoSearchType＝E_AUTO_SEARCH_TYPE_ALLWAYUP；
msAPI_ATV_InitProgramPLLData()；
u8StartFrom＝msAPI_ATV_GetChannelMin()-l；
msAPI_ATV_SetCurrentProgramNumber(u8StartFrom)；
_SetTunerPLL(msAPI_ATV_MapChanToFreq(u8StartFrom+1))；
_bIsAFTNeeded＝TRUE；
msAPI_VD_TurnOffAutoAV()；
msAPI_AUD_EnableRealtimeAudioDetection(FALSE)；
msAPI_AUD_EnableHiDeviation(msAPI_AUD_GetAudioStandard()，FALSE)；
//jpts
msAPI_AUD_SetAudioStandard((AUDIOSTANDARD_TYPE)E_AUDIOSTANDARD_M_BTSC)；
msAPI_Tuner_SetIF()；
msAPI_VD_SetHsyncDetectionForTuning(TRUE)；
bFirstDetect＝FALSE；
_u8NumberOfChBeGot_WhileAutoScan＝0；
u8StatusTemp＝0；
u8ScanOffsetCnt＝1；
u8VideoStableCount＝0；
_eCurrentTuningState＝AFT_CHECKSYNC；
break；
case?AFT_CHECKSYNC：
bIsSignalExist＝FALSE；
u8VideoStableCount++；
u8StatusTemp＜＜＝1；
u8StatusTemp|＝msAPI_VD_IsSyncDetected()；
if(u8VideoStableCount＞3)
{
if((u8StatusTemp&0x03)＝＝0x03)
{
_eCurrentTuningState＝AFT_TUNING；
u8ScanOffsetCnt＝1；
u8VideoStableCount＝0；
u16PreviosTunerPLL＝_u16TunerPLL；
u8StatusTemp＝0xff；
}
else
{
u8VideoStableCount＝0；
u8StatusTemp＝0x00；
if(u8ScanOffsetCnt＜＝1)
{
u16PreviosTunerPLL＝_u16TunerPLL；
u8ScanOffsetCnt++；
}
#if(HIS_CABLE_TUNE_NO_A17_A45_J28_J56)
else?if(u8ScanOffsetCnt＞＝5)
#else
else?if(u8ScanOffsetCnt＞5)
#endif
{
u8ScanOffsetCnt＝1；
_u16TunerPLL＝u16PreviosTunerPLL；
msAPI_VD_SetVideoStandard(E_VIDEOSTANDARD_PAL_M)；
_eCurrentTuningState＝AFT_MEMORIZEPRDATA；
}
else
{
#if(HIS_CABLE_TUNE_NO_A17_A45_J28_J56)
if(u8ScanOffsetCnt％2)
_SetTunerPLL(u16PreviosTunerPLL-(u8ScanOffsetCnt*8))；
else
_SetTunerPLL(u16PreviosTunerPLL+(u8ScanOffsetCnt*8))；
#else
if(u8ScanOffsetCnt％2)
_SetTunerPLL(u16PreviosTunerPLL-((u8ScanOffsetCnt/2)*8))；
else
_SetTunerPLL(u16PreviosTunerPLL+((u8ScanOffsetCnt/2)*8))；
#endif
u8ScanOffsetCnt++；
_u16TuningWaitTimer＝WAIT_50ms；
}
}
}
break；
Need to prove that above-mentioned code just illustrates, the embodiment of the invention is not limited to this, as long as can finish the code form of the method that the embodiment of the invention provides, is included in protection scope of the present invention.
The television set that the embodiment of the invention provides as shown in Figure 3, comprising:
Frequency shift (FS) module 302 is used for not detecting the synchronizing signal of this frequency values after a certain channel frequency value corresponding is set, and then increases or reduce this frequency values;
The television set that the embodiment of the invention provides can increase progressively to be provided with and search platform according to frequency meter; After a certain channel frequency value corresponding is set, do not detect the synchronizing signal of this frequency values, then increase or reduce this frequency values, and detect once more increase or reduce after this frequency values whether synchronizing signal is arranged.Like this, promptly utilized the characteristics of frequency meter, search speed is fast, has had non-standard signal compatible, for the inclined to one side signal of frequency values, excellent adaptability is arranged, and can avoid the leakage platform that causes because of frequency is non-standard.
Further, frequency shift (FS) module 302 also is used for not detecting the synchronizing signal of this frequency values after a certain channel frequency value corresponding is set, and then increases frequency values;
Whether this frequency values that search module 301 detects after increasing has synchronizing signal;
If this frequency values that does not still detect after the increase has synchronizing signal, 302 of frequency shift (FS) modules reduce this frequency values;
Whether this frequency values that search module 301 detects after reducing once more has synchronizing signal.
Perhaps, frequency shift (FS) module 302 also is used for not detecting the synchronizing signal of this frequency values after a certain channel frequency value corresponding is set, and then reduces this frequency values;
Whether this frequency values that search module 301 detects after reducing has synchronizing signal;
If this frequency values that does not still detect after reducing has synchronizing signal, frequency shift (FS) module 302 then increases this frequency values once more;
Whether this frequency values that search module 301 detects after increasing has synchronizing signal.
In addition, after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of this frequency values, can also repeatedly increase or reduce this frequency values, and to each increase or the frequency values after reducing detect, detect whether synchronizing signal is arranged.
Wherein, increase or the deviant that reduces is less than the peak excursion value that equals to preset.This peak excursion value can specifically be provided with according to different regions.
If after described channel value increases or reduces described peak excursion value, still do not detect synchronizing signal, determine that then this channel does not have signal.
Like this, not only utilized the characteristics of frequency meter, made and search platform and speed up, but also can compatible non-standard signal, for the inclined to one side signal of frequency values, excellent adaptability is arranged, can avoid the leakage platform that causes because of frequency is non-standard.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection range with claim.
Claims (10)
1, a kind of cable TV channel search method is characterized in that, comprising:
Increase progressively setting according to frequency meter and search platform;
After a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then increase or reduce described frequency values, and detect once more increase or reduce after described frequency values whether synchronizing signal is arranged.
2, cable TV channel search method according to claim 1, it is characterized in that, it is described after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then increase or reduce described frequency values, and detect to increase once more or reduce after described frequency values whether synchronizing signal is arranged, comprising:
After a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then increase described frequency values, whether the described frequency values that detects after increasing has synchronizing signal, if still do not have, then reduce described frequency values, and whether the described frequency values that detects after reducing there is synchronizing signal;
Perhaps, after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then reduce described frequency values, whether the described frequency values after detection reduces has synchronizing signal, if still do not have, then increase described frequency values, and whether the described frequency values that detects after increasing there is synchronizing signal.
3, cable TV channel search method according to claim 1 and 2, it is characterized in that, it is described after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then increase or reduce described frequency values, and detect to increase once more or reduce after described frequency values whether synchronizing signal is arranged, comprising:
After a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then repeatedly increase or reduce described frequency values, and to each increase or the described frequency values after reducing detect, detect whether synchronizing signal is arranged.
4, cable TV channel search method according to claim 3 is characterized in that, described increase or the deviant that reduces are smaller or equal to default peak excursion value.
5, cable TV channel search method according to claim 4 is characterized in that, if after described channel frequency value corresponding increases or reduces described peak excursion value, still do not detect synchronizing signal, determines that then described channel does not have signal.
6, a kind of television set is characterized in that, comprising:
Search module is used for increasing progressively setting according to frequency meter and searches platform;
The frequency shift (FS) module is used for not detecting the synchronizing signal of described frequency values after a certain channel frequency value corresponding is set, and then increases or reduce described frequency values;
Described search module, also be used for detecting once more increase or reduce after described frequency values whether synchronizing signal is arranged.
7, television set according to claim 6 is characterized in that, comprising:
Described frequency shift (FS) module also is used for not detecting the synchronizing signal of described frequency values after a certain channel frequency value corresponding is set, and then increases described frequency values;
Described search module, whether the described frequency values that also is used to detect after the increase has synchronizing signal;
Described frequency shift (FS) module if the described frequency values that also is used for still not detecting after the increase has synchronizing signal, then reduces described frequency values;
Described search module, whether the described frequency values that also is used to detect after reducing has synchronizing signal;
Perhaps, described frequency shift (FS) module also is used for not detecting the synchronizing signal of described frequency values after a certain channel frequency value corresponding is set, and then reduces described frequency values;
Described search module, whether the described frequency values that also is used to detect after reducing has synchronizing signal;
Described frequency shift (FS) module if the described frequency values that also is used for still not detecting after reducing has synchronizing signal, then increases described frequency values;
Described search module, whether the described frequency values that also is used to detect after the increase has synchronizing signal.
8, according to claim 6 or 7 described cable TV channel search methods, it is characterized in that, it is described after a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then increase or reduce described frequency values, and detect to increase once more or reduce after described frequency values whether synchronizing signal is arranged, comprising:
After a certain channel frequency value corresponding is set, do not detect the synchronizing signal of described frequency values, then repeatedly increase or reduce described frequency values, and to each increase or the described frequency values after reducing detect, detect whether synchronizing signal is arranged.
9, television set according to claim 8 is characterized in that, described increase or the deviant that reduces are smaller or equal to default peak excursion value.
10, television set according to claim 9 is characterized in that, if after described channel frequency value corresponding increases or reduces described peak excursion value, still do not detect synchronizing signal, determines that then described channel does not have signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101619925A CN101668147B (en) | 2009-09-10 | 2009-09-10 | Cable TV channel searching method and television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101619925A CN101668147B (en) | 2009-09-10 | 2009-09-10 | Cable TV channel searching method and television |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101668147A true CN101668147A (en) | 2010-03-10 |
| CN101668147B CN101668147B (en) | 2011-05-11 |
Family
ID=41804559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101619925A Active CN101668147B (en) | 2009-09-10 | 2009-09-10 | Cable TV channel searching method and television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101668147B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102572340A (en) * | 2012-02-09 | 2012-07-11 | 青岛海信电器股份有限公司 | Digital satellite television and digital satellite television channel searching method |
| 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 |
| CN105812915A (en) * | 2014-12-30 | 2016-07-27 | 深圳Tcl数字技术有限公司 | Television channel searching method and system |
| 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 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1278545C (en) * | 2003-11-04 | 2006-10-04 | 台达电子工业股份有限公司 | TV-set channel searching method |
| CN1303811C (en) * | 2004-11-16 | 2007-03-07 | 熊猫电子集团有限公司 | Searching method for TV programme signal |
| CN100459667C (en) * | 2004-11-23 | 2009-02-04 | 科胜讯宽带通讯（上海）有限公司 | Digit satellite frequency channel blind search method based on automatic gain control value |
| CN101472109A (en) * | 2007-12-24 | 2009-07-01 | 青岛海信电器股份有限公司 | Method for searching channel |
-
2009
- 2009-09-10 CN CN2009101619925A patent/CN101668147B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102572340A (en) * | 2012-02-09 | 2012-07-11 | 青岛海信电器股份有限公司 | Digital satellite television and digital satellite television channel searching method |
| CN102572340B (en) * | 2012-02-09 | 2016-06-01 | 青岛海信电器股份有限公司 | Digital satellite television channel search method and digital satellite television machine |
| 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 |
| CN105812915A (en) * | 2014-12-30 | 2016-07-27 | 深圳Tcl数字技术有限公司 | Television channel searching method and system |
| CN105812915B (en) * | 2014-12-30 | 2019-09-20 | 深圳Tcl数字技术有限公司 | Television channel searching method and system |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101668147B (en) | 2011-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101668147A (en) | Cable TV channel searching method and television | |
| US8547485B2 (en) | Systems and methods for channel scanning | |
| JP4637130B2 (en) | Mobile terminal and management method of digital broadcast service information in mobile terminal | |
| US11158229B2 (en) | Wireless reception device and image display apparatus including the same | |
| CN101461157B (en) | Digital broadcasting receiver | |
| CN101193198A (en) | Device allocation method for STB of personal video tape recorder | |
| WO2009014363A1 (en) | Image display device and method for controlling the same | |
| CN102202197A (en) | A kind of channel program searching method and television set | |
| CN101466009B (en) | Electronic equipment and method for sharing same transmission interface for audio and video signal | |
| CN1625240A (en) | Method of quick searching program by receiving terminal of digital TV system | |
| CN102137307A (en) | Service entry addressing method, related terminal and system | |
| CN103747353A (en) | Programme arrangement method and device | |
| CN102014253B (en) | Channel searching method and device and television set | |
| KR20110051631A (en) | Braodcasting receiving apparatus and control method of the saem | |
| CN101662620A (en) | Method for realizing multi-audio of digital television receiver | |
| CN101753919B (en) | Method for increasing automatic frequency point tracking range of TV | |
| JP5273793B2 (en) | Electronic device and switching method and program thereof | |
| US20090033797A1 (en) | Video display apparatus and noise removal method thereof | |
| CN101267508A (en) | Channel location method and system | |
| KR101708632B1 (en) | Image display apparatus using wireless communication and method for operating the same | |
| CN105898580A (en) | Multipath SCART channel intelligent switching method and television employing same | |
| JP2009060548A (en) | Digital broadcasting receiver and service search method | |
| KR101708631B1 (en) | Image display apparatus using wireless communication and method for operating the same | |
| KR20090064831A (en) | Broadcast receiver setting up auto channel and method thereof | |
| US8892227B2 (en) | In-vehicle device and method for controlling the same |
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 | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee after: Hisense Visual Technology Co., Ltd. Address before: 266555 Qingdao economic and Technological Development Zone, Shandong, Hong Kong Road, No. 218 Patentee before: QINGDAO HISENSE ELECTRONICS Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |