CN105516798A - Channel search method and system for television terminal - Google Patents
Channel search method and system for television terminal Download PDFInfo
- Publication number
- CN105516798A CN105516798A CN201510952919.5A CN201510952919A CN105516798A CN 105516798 A CN105516798 A CN 105516798A CN 201510952919 A CN201510952919 A CN 201510952919A CN 105516798 A CN105516798 A CN 105516798A
- Authority
- CN
- China
- Prior art keywords
- interval
- frequency
- television terminal
- frequency point
- band
- 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
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 MPEG packets from an IP network
- H04N21/4383—Accessing a communication channel
-
- 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 MPEG packets from an IP network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
- H04N5/50—Tuning indicators; Automatic tuning control
Abstract
The invention discloses a channel search method for a television terminal. The method comprises: when a channel search instruction is detected, obtaining a frequency band interval of a radio-frequency signal received by the television terminal; dividing the frequency band interval into continuously distributed sub-frequency band intervals with preset bandwidths; performing spectral analysis on radio-frequency signals of the sub-frequency band intervals one by one to obtain image carrier frequency points in spectrograms of the sub-frequency band intervals; and according to the image carrier frequency points, performing channel search and setting frequency points confirmed through channel search as channel carrier frequency points. The invention furthermore discloses a channel search system for the television terminal. According to the channel search method and system, the sub-frequency band intervals with the preset bandwidths are subjected to spectral analysis in sequence to quickly obtain the image carrier frequency points in the sub-frequency band intervals, and the image carrier frequency points are set as the channel carrier frequency points, so that the analysis and demodulation of each frequency point in the frequency band interval are avoided, the channel search time for the television terminal is shortened, and the channel search efficiency of the television terminal is improved.
Description
Technical field
The present invention relates to TV tuning technical field, particularly relate to a kind of television terminal channel search method and system.
Background technology
Along with the development of science and technology, television terminal (such as LCD TV) obtains extensively universal, and television terminal appears in each family as the household electrical appliance of indispensability gradually.People generally need to control television terminal and carry out tuning and preserve channel, just by television terminal TV reception, but, the tuning principle of television terminal is in the market based on time domain analysis, Frequency point on the radiofrequency signal full frequency band received is analyzed and demodulation one by one, wasting the plenty of time analyzes and demodulation the Frequency point (i.e. non-image carrier frequency point) not being vision carrier frequency, cause television terminal to carry out a full frequency band frequency point tuning to need to take a long time, cause television terminal tuning inefficiency.
Summary of the invention
Main purpose of the present invention is to provide a kind of television terminal channel search method and system, is intended to the technical problem solving existing television terminal tuning inefficiency.
For achieving the above object, a kind of television terminal channel search method provided by the invention, described television terminal channel search method comprises:
When tuning instruction being detected, the frequency range obtaining the radiofrequency signal that television terminal receives is interval;
Described frequency range interval division is pre-set bandwidths and the frequency sub-band of continuous distribution is interval;
One by one spectrum analysis is carried out to the radiofrequency signal in described frequency sub-band interval, obtain the vision carrier frequency point in the spectrogram in frequency sub-band interval described in each;
Carry out tuning according to vision carrier frequency point described in each, the carrier frequency point after confirming through tuning is set to channel carrier frequency point.
Preferably, describedly carry out tuning according to vision carrier frequency point described in each, the step that the carrier frequency point after confirming through tuning is set to channel carrier frequency point comprised:
With default fine setting step-length, all frequencies in fine setting bandwidth range are preset to each described vision carrier frequency point and carries out demodulation;
Each described vision carrier frequency point being preset the frequency point setting that in fine setting bandwidth range, signal strength signal intensity is maximum is channel carrier frequency point.
Preferably, described when tuning instruction being detected, the step obtaining the frequency range interval of the radiofrequency signal that television terminal receives comprises:
When tuning instruction being detected, the national information that the current location of acquisition residing for television terminal is corresponding;
According to the national information obtained, obtain corresponding frequency range interval, using interval for interval for this frequency range frequency range as the radiofrequency signal of the current reception of television terminal.
Preferably, describedly carry out spectrum analysis to the radiofrequency signal in described frequency sub-band interval one by one, the step obtaining the vision carrier frequency point in the spectrogram in frequency sub-band interval described in each comprises:
One by one spectrum analysis is carried out to the radiofrequency signal in described frequency sub-band interval, when the Frequency point in described frequency sub-band interval has signal spectrum, using this Frequency point as potential frequency;
If the Frequency point that this potential frequency of interval presets frequency range interval also has signal spectrum, then described potential frequency is set to vision carrier frequency point, to obtain the vision carrier frequency point in the spectrogram in frequency sub-band interval described in each.
Preferably, describedly by described frequency range interval division be that signal bandwidth is pre-set bandwidths and the step in the frequency sub-band interval of continuous distribution comprises:
By band pass filter, filtering process is carried out to the radiofrequency signal that television terminal receives;
Export the radiofrequency signal of pre-set bandwidths one by one, with by described frequency range interval division for pre-set bandwidths and the frequency sub-band of continuous distribution is interval.
For achieving the above object, the present invention also provides a kind of television terminal channel searching system, and described television terminal channel searching system comprises:
Interval acquisition module, for when tuning instruction being detected, the frequency range obtaining the radiofrequency signal that television terminal receives is interval;
Interval division module, is pre-set bandwidths by described frequency range interval division and the frequency sub-band of continuous distribution is interval;
Spectrum analysis module, carries out spectrum analysis to the radiofrequency signal in described frequency sub-band interval one by one, obtains the vision carrier frequency point in the spectrogram in frequency sub-band interval described in each;
Frequency point setting after confirming through tuning, for carrying out tuning according to vision carrier frequency point described in each, is channel carrier frequency point by channel fix module.
Preferably, described channel fix module comprises:
Fine-adjusting unit, for default fine setting step-length, presets all frequencies in fine setting bandwidth range to each described vision carrier frequency point and carries out demodulation;
Setting unit is channel carrier frequency point for each described vision carrier frequency point being preset the frequency point setting that in fine setting bandwidth range, signal strength signal intensity is maximum.
Preferably, described interval acquisition module comprises:
First acquiring unit, for when tuning instruction being detected, the national information that the current location of acquisition residing for television terminal is corresponding;
Second acquisition unit, for according to the national information obtained, obtains corresponding frequency range interval, using interval for interval for this frequency range frequency range as the radiofrequency signal of the current reception of television terminal.
Preferably, described spectrum analysis module comprises:
First analytic unit, for carrying out spectrum analysis to the radiofrequency signal in described frequency sub-band interval one by one, when the Frequency point in described frequency sub-band interval has signal spectrum, using this Frequency point as potential frequency;
Second analytic unit, if the Frequency point presetting frequency range interval for this potential frequency of interval also has signal spectrum, is then set to vision carrier frequency point by described potential frequency, to obtain the vision carrier frequency point in the spectrogram in frequency sub-band interval described in each.
Preferably, described interval division module comprises:
Filter unit, for carrying out filtering process by band pass filter to the radiofrequency signal that television terminal receives;
Zoning unit, for exporting the radiofrequency signal of pre-set bandwidths one by one, with by described frequency range interval division for pre-set bandwidths and the frequency sub-band of continuous distribution is interval.
The present invention is by when tuning instruction being detected, and the frequency range obtaining the radiofrequency signal that television terminal receives is interval; Then frequency range interval division is pre-set bandwidths and the frequency sub-band of continuous distribution is interval; And one by one spectrum analysis is carried out to the radiofrequency signal in frequency sub-band interval, obtain the vision carrier frequency point in the spectrogram in each frequency sub-band interval; Finally carry out tuning according to each vision carrier frequency point, be channel carrier frequency point by the frequency point setting after confirming through tuning, thus successively spectrum analysis is carried out to the frequency sub-band interval of pre-set bandwidths, this vision carrier frequency point is also set to channel carrier frequency point by quick obtaining vision carrier frequency point wherein, avoid analyzing and demodulation each frequency in frequency range interval, save the time of television terminal tuning, improve the efficiency of television terminal tuning.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of television terminal channel search method first embodiment of the present invention;
Fig. 2 carries out tuning according to each vision carrier frequency point in television terminal channel search method second embodiment of the present invention, is the refinement schematic flow sheet of the step of channel carrier frequency point by the frequency point setting after confirming through tuning;
Fig. 3 is in television terminal channel search method the 3rd embodiment of the present invention when tuning instruction being detected, obtains the refinement schematic flow sheet of the step in the frequency range interval of the radiofrequency signal that television terminal receives;
Fig. 4 carries out spectrum analysis to the radiofrequency signal in frequency sub-band interval in television terminal channel search method the 4th embodiment of the present invention one by one, obtains the refinement schematic flow sheet of the step of the vision carrier frequency point in the spectrogram in each frequency sub-band interval;
Frequency range interval division is pre-set bandwidths in television terminal channel search method the 5th embodiment of the present invention and the refinement schematic flow sheet of the step in the frequency sub-band interval of continuous distribution by Fig. 5;
Fig. 6 is the high-level schematic functional block diagram of television terminal channel searching system first embodiment of the present invention;
Fig. 7 television terminal channel searching system second of the present invention embodiment mid band arranges the refinement high-level schematic functional block diagram of module;
The refinement high-level schematic functional block diagram of interval acquisition module in Fig. 8 television terminal of the present invention channel searching system the 3rd embodiment;
The refinement high-level schematic functional block diagram of Fig. 9 television terminal channel searching system the 4th of the present invention embodiment intermediate frequency spectrum analysis module;
The refinement high-level schematic functional block diagram of interval division module in Figure 10 television terminal channel searching system the 5th of the present invention embodiment.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of television terminal channel search method, in the first embodiment of television terminal channel search method of the present invention, with reference to Fig. 1, this television terminal channel search method comprises:
Step S10, when tuning instruction being detected, the frequency range obtaining the radiofrequency signal that television terminal receives is interval;
When user performs tuning operation to television terminal, such as user presses the tuning key of remote controller, and television terminal produces tuning instruction.Television terminal channel searching system detects television terminal in real time and whether produces tuning instruction, when tuning instruction being detected, show that user needs television terminal to carry out tuning, the frequency range now obtaining the radiofrequency signal that television terminal receives is interval, namely the frequency range of radiofrequency signal that inputs to television terminal of radio-frequency (RF) signal input end is interval, and the frequency range interval of such as China full frequency band is 43MHz to 866MHz.
Step S20, is pre-set bandwidths by frequency range interval division and the frequency sub-band of continuous distribution is interval;
Segmentation is carried out to the frequency range interval of the radiofrequency signal being input to television terminal, object is convenient to carry out spectrum analysis to this radiofrequency signal, bandwidth definition because of a channel of PAL-D/K standard is 8MHz, can set pre-set bandwidths is here 40MHz, namely be equivalent to have 5 channel bandwidths to analyze in spectrum analysis module, division frequency range interval is for pre-set bandwidths and the frequency sub-band interval of continuous distribution has band pass filter to complete simultaneously.Such as, the frequency range interval of the radiofrequency signal that television terminal receives is 49.75MHz to 209.75MHz, pre-set bandwidths is 40MHz, then this frequency range interval division is four frequency sub-band intervals of continuous distribution, is respectively: 49.75MHz to 89.75MHz, 89.75MHz to 129.75MHz, 129.75MHz to 169.75MHz, 169.75MHz to 209.75MHz.In addition, pre-set bandwidths can be the integral multiple of channel bandwidth.Be understandable that, the division in frequency range interval can change accordingly according to the difference of television system.
Step S30, carries out spectrum analysis to the radiofrequency signal in frequency sub-band interval one by one, obtains the vision carrier frequency point in the spectrogram in each frequency sub-band interval;
One by one spectrum analysis is carried out to the radiofrequency signal in all frequency sub-band intervals, namely carry out Fourier transform to the radiofrequency signal (namely complicated time history waveform) between each sub-channel zone to be decomposed into some single harmonic components and to study, to obtain the frequency structure of signal and each harmonic wave and phase information, and according to the vision carrier frequency point in the spectrogram in each frequency sub-band interval of these acquisition of informations.Such as, first spectrogram will have the Frequency point of spectrum signal as potential frequency, if then the Frequency point of this potential frequency predeterminated frequency interval (frequency interval of sound carrier frequency) of interval also possesses spectrum signal, then using this potential frequency as vision carrier frequency point.In addition, vision carrier frequency point can be concentrated and be kept in frequency list.
Step S40, carries out tuning according to each vision carrier frequency point, is channel carrier frequency point by the frequency point setting after confirming through tuning.
Tuning is carried out to the frequency range interval near the vision carrier frequency point in each frequency sub-band interval, that carrier frequency point after tuning confirms is set to channel carrier frequency point, and namely user switches to by controlling television terminal the TV programme that these channel carrier frequency points just can watch correspondence.
In the present embodiment, by when tuning instruction being detected, the frequency range obtaining the radiofrequency signal that television terminal receives is interval; Then frequency range interval division is pre-set bandwidths and the frequency sub-band of continuous distribution is interval; And one by one spectrum analysis is carried out to the radiofrequency signal in frequency sub-band interval, obtain the vision carrier frequency point in the spectrogram in each frequency sub-band interval; Finally carry out tuning according to each vision carrier frequency point, carrier frequency point after confirming through tuning is set to channel carrier frequency point, thus successively spectrum analysis is carried out to the frequency sub-band interval of pre-set bandwidths, this vision carrier frequency point is also set to channel carrier frequency point by quick obtaining vision carrier frequency point wherein, avoid analyzing and demodulation each frequency in frequency range interval, save the time of television terminal tuning, improve the efficiency of television terminal tuning.
Further, on the basis of television terminal channel search method first embodiment of the present invention, propose television terminal channel search method second embodiment, with reference to Fig. 2, in a second embodiment, step S40 comprises:
Step S41, with default fine setting step-length, presets all frequencies in fine setting bandwidth range to each vision carrier frequency point and carries out demodulation;
Step S42, each vision carrier frequency point being preset the frequency point setting that in fine setting bandwidth range, signal strength signal intensity is maximum is channel carrier frequency point.
Due to each channel of tv channel list and corresponding vision carrier frequency be one to one and be changeless (vision carrier frequency of the channel 1 of such as PAL-D/K standard is 49.75MHz), and due to factors such as television terminal hardware difference, spectrum analysis errors, certain deviation may be there is in the vision carrier frequency point obtained by spectrum analysis and real image carrier frequency point, not accurate especially, need to carry out meticulous tuning; If the vision carrier frequency point namely through spectrum analysis gained is direct as channel carrier frequency point, may there is unintelligible, that image has interference snow phenomenon in television terminal TV reception.Meticulous tuning idiographic flow is as follows: first select a vision carrier frequency point, and preset in fine setting bandwidth range at this vision carrier frequency point and carry out demodulation with default fine setting step-length, the maximum frequency of select-out signal intensity is as channel carrier frequency point; Then near in like manner selecting other vision carrier frequency points one by one, the strongest frequency of signal strength signal intensity is as other channel carrier frequency point.
Such as, first the vision carrier frequency point selected, frequency is 50.25MHz, if presetting fine setting bandwidth is 1MHz, presetting fine setting step-length is 0.25MHz, by non-coherent demodulation or coherent demodulation method by step-length 0.25MHz from 49.75MHz to 50.75MHz in bandwidth (in the 1M bandwidth namely centered by 50.25) carry out demodulation one by one, finally determine that the maximum Frequency point of signal strength signal intensity is as channel carrier frequency point according to the signal strength signal intensity demodulated.In addition, connect this section of example, frequency is 50.25MHz, presetting fine setting bandwidth is 1MHz, presetting fine setting step-length is 0.25MHz, according to the frequency distribution of tv channel list intermediate frequency Taoist monastic name, learn that the Frequency point 49.75MHz (for PAL-D/K standard) of 1 channel and vision carrier frequency point 50.25MHz are closest, thus by non-coherent demodulation or coherent demodulation method by step-length 0.25MHz from 49.25MHz to 50.25MHz in bandwidth (in the 1M bandwidth namely centered by 49.75) carry out demodulation one by one, finally determine that the maximum Frequency point of signal strength signal intensity is as channel carrier frequency point according to the signal strength signal intensity demodulated.
In the present embodiment, by after determining vision carrier frequency point, further demodulation is carried out to the frequency that vision carrier frequency point is preset in fine setting bandwidth range, select each vision carrier frequency point and to preset in fine setting bandwidth the maximum frequency of signal strength signal intensity as channel carrier frequency point, further increase the accuracy of channel carrier frequency point, improve the video quality of television terminal according to channel carrier frequency program request placing TV program.
Further, on the basis of television terminal channel search method first embodiment of the present invention, propose television terminal channel search method the 3rd embodiment, with reference to Fig. 3, in the third embodiment, step S10 comprises:
Step S11, when tuning instruction being detected, the national information that the current location of acquisition residing for television terminal is corresponding;
Step S12, according to the national information obtained, obtains corresponding frequency range interval, using interval for interval for this frequency range frequency range as the radiofrequency signal of the current reception of television terminal.
Due in different countries, the frequency range interval for the radiofrequency signal of television terminal is not quite similar, and such as frequency range interval of China is 43MHz to 866MHz, and Japanese frequency range interval is 88MHz to 770MHz; So when tuning instruction being detected, first can obtain the current location residing for television terminal, and obtain national information (such as national code) corresponding to television terminal present position according to current location; According to the national information obtained, obtain corresponding frequency range interval, and using interval for interval for this frequency range frequency range as the radiofrequency signal of the current reception of television terminal.
In the present embodiment, by when tuning instruction being detected, first obtain television terminal current location to the national information of correspondence, then corresponding frequency range is obtained according to national information interval, thus avoid the frequency range interval of frequency range interval and the television terminal the country one belongs to obtained inconsistent, and then the leakage platform phenomenon avoided frequency range interval inconsistent and cause.
Further, on the basis of television terminal channel search method first embodiment of the present invention, propose television terminal channel search method the 4th embodiment, with reference to Fig. 4, in the fourth embodiment, step S30 comprises:
Step S31, carries out spectrum analysis to the radiofrequency signal in frequency sub-band interval one by one, when the Frequency point in frequency sub-band interval has signal spectrum, using this Frequency point as potential frequency;
Step S32, if the Frequency point that this potential frequency of interval presets frequency range interval also has signal spectrum, is then set to vision carrier frequency point by potential frequency, to obtain the vision carrier frequency point in the spectrogram in each frequency sub-band interval.
After determining the frequency range interval of the radiofrequency signal that television terminal receives, from interval first frequency sub-band of this frequency range is interval, carry out spectrum analysis one by one to the radiofrequency signal in each frequency sub-band interval, in the Frequency point in analysis frequency sub-band interval, which has signal spectrum; When the Frequency point in frequency sub-band interval has signal spectrum, using this Frequency point as potential frequency; Then judge whether the Frequency point that the potential frequency in interval presets frequency range interval also has signal spectrum further; If the Frequency point that this potential frequency of interval presets frequency range interval also has signal spectrum, then potential frequency is set to vision carrier frequency point, cycle analysis like this judges, obtains the vision carrier frequency point in the spectrogram in each frequency sub-band interval.Such as frequency sub-band is interval when 49.75MHz to 89.75MHz is interval, because the frequency interval of vision carrier frequency and sound carrier frequency is fixed as 6.5MHz, so establish default frequency range to be spaced apart 6.5MHz, if 49.75MHz Frequency point has signal spectrum in frequency sub-band interval, using this 49.75MHz Frequency point as potential frequency, then the 56.25MHz Frequency point of this Frequency point of judging distance 6.5MHz also has signal spectrum further, then can judge that 49.75MHz Frequency point is as vision carrier frequency point, the rest may be inferred, determines all vision carrier frequency points in all frequency sub-band intervals.
In the present embodiment, by carrying out spectrum analysis to the radiofrequency signal in all frequency sub-band intervals one by one, first analyze and select in frequency sub-band interval the potential frequency with signal spectrum, then judge whether the Frequency point outside the default frequency range interval of potential frequency also has signal spectrum, be vision carrier frequency point by the potential frequency point setting meeting Rule of judgment, thus achieve radio frequency signal Spectrum Analysis by a kind of simple, feasible mode and select vision carrier frequency point quickly and accurately.
Further, on the basis of television terminal channel search method first embodiment of the present invention, propose television terminal channel search method the 5th embodiment, with reference to Fig. 5, in the 5th embodiment, step S20 comprises:
Step S21, carries out filtering process by band pass filter to the radiofrequency signal that television terminal receives;
Step S22, exports the radiofrequency signal of pre-set bandwidths one by one, with by frequency range interval division for pre-set bandwidths and the frequency sub-band of continuous distribution is interval.
Band pass filter is one and allows the ripple of special frequency channel by shielding the equipment of other frequency ranges simultaneously, television terminal inside is provided with band pass filter, after determining the frequency range interval of the radiofrequency signal that television terminal receives, control cincture bandpass filter carries out filtering process to the radiofrequency signal that television terminal receives, export the radiofrequency signal of pre-set bandwidths one by one, to be divided into as pre-set bandwidths and the frequency sub-band of continuous distribution is interval in frequency range interval.One execution mode of concrete processing procedure is as follows: by the left side dividing value in frequency range interval, (such as frequency range interval is 43MHz to 866MHz, then the left side dividing value in frequency range interval is 43MHz) be set to the initial frequency of band pass filter, make the radiofrequency signal through band pass filter be limited in pre-set bandwidths (such as 40MHz), namely export the radiofrequency signal of first frequency sub-band interval (43MHz to 83MHz); Then the left side dividing value (i.e. 83MHz) resetting the second frequency sub-band interval (83MHz to 123MHz) is the new initial frequency of band pass filter, the radiofrequency signal through band pass filter is made to be limited in pre-set bandwidths (such as 40MHz), namely the radiofrequency signal of second frequency sub-band interval (83MHz to 123MHz) is exported, circulation like this, until it is interval to have searched for the whole frequency range of television terminal, thus frequency range interval division is pre-set bandwidths and the frequency sub-band of continuous distribution is interval.
In the present embodiment, by adopting band pass filter, filtering process is carried out to the radiofrequency signal that television terminal receives, continuous change band pass filter allow by signal frequency range, and export the radiofrequency signal of pre-set bandwidths one by one, the radiofrequency signal frequency range interval division that television terminal receives is pre-set bandwidths and the frequency sub-band of continuous distribution is interval, thus with a kind of simple, subregion that mode that is that be easy to realize achieves frequency range interval, thus be conducive to carrying out spectrum analysis to the signal in each frequency sub-band interval.
In addition, on the basis of television terminal channel search method of the present invention second, third or the 4th embodiment,
Step S20 comprises:
Step S21, carries out filtering process by band pass filter to the radiofrequency signal that television terminal receives;
Step S22, exports the radiofrequency signal of pre-set bandwidths one by one, with by frequency range interval division for pre-set bandwidths and the frequency sub-band of continuous distribution is interval.
The present invention also provides a kind of television terminal channel searching system, and in the first embodiment of television terminal channel searching system, with reference to Fig. 6, this television terminal channel searching system comprises:
Interval acquisition module 10, for when tuning instruction being detected, the frequency range obtaining the radiofrequency signal that television terminal receives is interval;
When user performs tuning operation to television terminal, such as user presses the tuning key of remote controller, and television terminal produces tuning instruction.Television terminal channel searching system detects television terminal in real time and whether produces tuning instruction, when tuning instruction being detected, show that user needs television terminal to carry out tuning, now interval acquisition module 10 obtains the frequency range interval of the radiofrequency signal that television terminal receives, namely the frequency range of radiofrequency signal that inputs to television terminal of radio-frequency (RF) signal input end is interval, and the frequency range interval of such as China full frequency band is 43MHz to 866MHz.
Interval division module 20, is pre-set bandwidths by frequency range interval division and the frequency sub-band of continuous distribution is interval;
Segmentation is carried out in the frequency range interval of interval division module 20 to the radiofrequency signal being input to television terminal, object is convenient to carry out spectrum analysis to this radiofrequency signal, bandwidth definition because of a channel of PAL-D/K standard is 8MHz, can set pre-set bandwidths is here 40MHz, namely be equivalent to have 5 channel bandwidths to analyze in spectrum analysis module, division frequency range interval is for pre-set bandwidths and the frequency sub-band interval of continuous distribution has band pass filter to complete simultaneously.Such as, the frequency range interval of the radiofrequency signal that television terminal receives is 49.75MHz to 209.75MHz, pre-set bandwidths is 40MHz, then this frequency range interval division is four frequency sub-band intervals of continuous distribution, is respectively: 49.75MHz to 89.75MHz, 89.75MHz to 129.75MHz, 129.75MHz to 169.75MHz, 169.75MHz to 209.75MHz.In addition, pre-set bandwidths can be the integral multiple of channel bandwidth.Be understandable that, the division in frequency range interval can change accordingly according to the difference of television system.
Spectrum analysis module 30, carries out spectrum analysis to the radiofrequency signal in frequency sub-band interval one by one, obtains the vision carrier frequency point in the spectrogram in each frequency sub-band interval;
Spectrum analysis module 30 carries out spectrum analysis to the radiofrequency signal in all frequency sub-band intervals one by one, namely carry out Fourier transform to the radiofrequency signal (namely complicated time history waveform) between each sub-channel zone to be decomposed into some single harmonic components and to study, to obtain the frequency structure of signal and each harmonic wave and phase information, and according to the vision carrier frequency point in the spectrogram in each frequency sub-band interval of these acquisition of informations.Such as, first spectrogram will have the Frequency point of spectrum signal as potential frequency, if then the Frequency point of this potential frequency predeterminated frequency interval (frequency interval of sound carrier frequency) of interval also possesses spectrum signal, then using this potential frequency as vision carrier frequency point.In addition, vision carrier frequency point can be concentrated and be kept in frequency list.
Frequency point setting after confirming through tuning, for carrying out tuning according to each vision carrier frequency point, is channel carrier frequency point by channel fix module 40.
Channel fix module 40 carries out tuning to the frequency range interval near the vision carrier frequency point in each frequency sub-band interval, just like that carrier frequency point after tuning confirms is set to channel carrier frequency point, namely user switches to by controlling television terminal the TV programme that these channel carrier frequency points just can watch correspondence.
In the present embodiment, by when tuning instruction being detected, the frequency range that interval acquisition module 10 obtains the radiofrequency signal that television terminal receives is interval; Then frequency range interval division is pre-set bandwidths and the frequency sub-band of continuous distribution is interval by interval division module 20; Spectrum analysis module 30 carries out spectrum analysis to the radiofrequency signal in frequency sub-band interval one by one, obtains the vision carrier frequency point in the spectrogram in each frequency sub-band interval; Final channel arranges module 40 and carries out tuning according to each vision carrier frequency point, carrier frequency point after confirming through tuning is set to channel carrier frequency point, thus successively spectrum analysis is carried out to the frequency sub-band interval of pre-set bandwidths, this vision carrier frequency point is also set to channel carrier frequency point by quick obtaining vision carrier frequency point wherein, avoid analyzing and demodulation each frequency in frequency range interval, save the time of television terminal tuning, improve the efficiency of television terminal tuning.
Further, on the basis of television terminal channel searching system first embodiment of the present invention, propose television terminal channel searching system second embodiment, with reference to Fig. 7, in a second embodiment, channel fix module 40 comprises:
Fine-adjusting unit 41, for default fine setting step-length, presets all frequencies in fine setting bandwidth range to each vision carrier frequency point and carries out demodulation;
Setting unit 42 is channel carrier frequency point for each vision carrier frequency point being preset the frequency point setting that in fine setting bandwidth range, signal strength signal intensity is maximum.
Due to each channel of tv channel list and corresponding vision carrier frequency be one to one and be changeless (vision carrier frequency of the channel 1 of such as PAL-D/K standard is 49.75MHz), and due to factors such as television terminal hardware difference, spectrum analysis errors, certain deviation may be there is in the vision carrier frequency point obtained by spectrum analysis and real image carrier frequency point, not accurate especially, need to carry out meticulous tuning; If the vision carrier frequency point namely through spectrum analysis gained is direct as channel carrier frequency point, may there is unintelligible, that image has interference snow phenomenon in television terminal TV reception.Meticulous tuning idiographic flow is as follows: first select a vision carrier frequency point, and fine-adjusting unit 41 is preset in fine setting bandwidth range at this vision carrier frequency point and carried out demodulation with default fine setting step-length, and the maximum frequency of setting unit 42 select-out signal intensity is as channel carrier frequency point; Then near in like manner selecting other vision carrier frequency points one by one, the strongest frequency of signal strength signal intensity is as other channel carrier frequency point.
Such as, first the vision carrier frequency point selected, frequency is 50.25MHz, if presetting fine setting bandwidth is 1MHz, presetting fine setting step-length is 0.25MHz, by non-coherent demodulation or coherent demodulation method by step-length 0.25MHz from 49.75MHz to 50.75MHz in bandwidth (in the 1M bandwidth namely centered by 50.25) carry out demodulation one by one, finally determine that the maximum Frequency point of signal strength signal intensity is as channel carrier frequency point according to the signal strength signal intensity demodulated.In addition, connect this section of example, frequency is 50.25MHz, presetting fine setting bandwidth is 1MHz, presetting fine setting step-length is 0.25MHz, according to the frequency distribution of tv channel list intermediate frequency Taoist monastic name, learn that the Frequency point 49.75MHz (for PAL-D/K standard) of a channel and vision carrier frequency point 50.25MHz are closest, thus by non-coherent demodulation or coherent demodulation method by step-length 0.25MHz from 49.25MHz to 50.25MHz in bandwidth (in the 1M bandwidth namely centered by 49.75) carry out demodulation one by one, finally determine that the maximum Frequency point of signal strength signal intensity is as channel carrier frequency point according to the signal strength signal intensity demodulated.
In the present embodiment, by after determining vision carrier frequency point, fine-adjusting unit 41 carries out demodulation to the frequency that vision carrier frequency point is preset in fine setting bandwidth range further, setting unit 42 is selected each vision carrier frequency point and to be preset in fine setting bandwidth the maximum frequency of signal strength signal intensity as channel carrier frequency point, further increase the accuracy of channel carrier frequency point, improve the video quality of television terminal according to channel carrier frequency program request placing TV program.
Further, on the basis of television terminal channel searching system first embodiment of the present invention, propose television terminal channel searching system the 3rd embodiment, with reference to Fig. 8, in the third embodiment, interval acquisition module 10 comprises:
First acquiring unit 11, for when tuning instruction being detected, the national information that the current location of acquisition residing for television terminal is corresponding;
Second acquisition unit 12, for according to the national information obtained, obtains corresponding frequency range interval, using interval for interval for this frequency range frequency range as the radiofrequency signal of the current reception of television terminal.
Due in different countries, the frequency range interval for the radiofrequency signal of television terminal is not quite similar, and such as frequency range interval of China is 43MHz to 866MHz, and Japanese frequency range interval is 88MHz to 770MHz; So when tuning instruction being detected, first can obtain the current location residing for television terminal by the first acquiring unit 11, and obtain national information (such as national code) corresponding to television terminal present position according to current location; Second acquisition unit 12, according to the national information obtained, obtains corresponding frequency range interval, and using interval for interval for this frequency range frequency range as the radiofrequency signal of the current reception of television terminal.
In the present embodiment, by when tuning instruction being detected, first acquiring unit 11 first obtains television terminal current location to the national information of correspondence, then second acquisition unit 12 obtains corresponding frequency range interval according to national information, thus avoid the frequency range interval of frequency range interval and the television terminal the country one belongs to obtained inconsistent, and then the leakage platform phenomenon avoided frequency range interval inconsistent and cause.
Further, on the basis of television terminal channel searching system first embodiment of the present invention, propose television terminal channel searching system the 4th embodiment, with reference to Fig. 9, in the fourth embodiment, spectrum analysis module 30 comprises:
First analytic unit 31, for carrying out spectrum analysis to the radiofrequency signal in frequency sub-band interval one by one, when the Frequency point in frequency sub-band interval has signal spectrum, using this Frequency point as potential frequency;
Second analytic unit 32, if the Frequency point presetting frequency range interval for this potential frequency of interval also has signal spectrum, is then set to vision carrier frequency point by potential frequency, to obtain the vision carrier frequency point in the spectrogram in each frequency sub-band interval.
After determining the frequency range interval of the radiofrequency signal that television terminal receives, first analytic unit 31 carries out spectrum analysis to the radiofrequency signal in each frequency sub-band interval one by one from interval first frequency sub-band of this frequency range is interval, and in the Frequency point in analysis frequency sub-band interval, which has signal spectrum; When the Frequency point in frequency sub-band interval has signal spectrum, using this Frequency point as potential frequency; Then the second analytic unit 32 judges further whether the Frequency point that the potential frequency in interval presets frequency range interval also has signal spectrum; If the Frequency point that this potential frequency of interval presets frequency range interval also has signal spectrum, then potential frequency is set to vision carrier frequency point, cycle analysis like this judges, obtains the vision carrier frequency point in the spectrogram in each frequency sub-band interval.Such as frequency sub-band is interval when 49.75MHz to 89.75MHz is interval, because the frequency interval of vision carrier frequency and sound carrier frequency is fixed as 6.5MHz, so establish default frequency range to be spaced apart 6.5MHz, if 49.75MHz Frequency point has signal spectrum in frequency sub-band interval, using this 49.75MHz Frequency point as potential frequency, then the 56.25MHz Frequency point of this Frequency point of judging distance 6.5MHz also has signal spectrum further, then can judge that 49.75MHz Frequency point is as vision carrier frequency point, the rest may be inferred, determines all vision carrier frequency points in all frequency sub-band intervals.
In the present embodiment, one by one spectrum analysis is carried out to the radiofrequency signal in all frequency sub-band intervals by the first analytic unit 31, first analyze and select in frequency sub-band interval the potential frequency with signal spectrum, then the second analytic unit 32 judges whether the Frequency point outside the default frequency range interval of potential frequency also has signal spectrum, be vision carrier frequency point by the potential frequency point setting meeting Rule of judgment, thus achieve radio frequency signal Spectrum Analysis by a kind of simple, feasible mode and select vision carrier frequency point quickly and accurately.
Further, on the basis of television terminal channel searching system first embodiment of the present invention, propose television terminal channel searching system the 5th embodiment, with reference to Figure 10, in the 5th embodiment, interval division module 20 comprises:
Filter unit 21, for carrying out filtering process by band pass filter to the radiofrequency signal that television terminal receives;
Zoning unit 22, for exporting the radiofrequency signal of pre-set bandwidths one by one, with by frequency range interval division for pre-set bandwidths and the frequency sub-band of continuous distribution is interval.
Band pass filter is one and allows the ripple of special frequency channel by shielding the equipment of other frequency ranges simultaneously, television terminal inside is provided with band pass filter, after determining the frequency range interval of the radiofrequency signal that television terminal receives, filter unit 21 control cincture bandpass filter carries out filtering process to the radiofrequency signal that television terminal receives, zoning unit 22 exports the radiofrequency signal of pre-set bandwidths one by one, to be divided into as pre-set bandwidths and the frequency sub-band of continuous distribution is interval in frequency range interval.One execution mode of concrete processing procedure is as follows: by the left side dividing value in frequency range interval, (such as frequency range interval is 43MHz to 866MHz, then the left side dividing value in frequency range interval is 43MHz) be set to the initial frequency of band pass filter, make the radiofrequency signal through band pass filter be limited in pre-set bandwidths (such as 40MHz), namely export the radiofrequency signal of first frequency sub-band interval (43MHz to 83MHz); Then the left side dividing value (i.e. 83MHz) resetting the second frequency sub-band interval (83MHz to 123MHz) is the new initial frequency of band pass filter, the radiofrequency signal through band pass filter is made to be limited in pre-set bandwidths (such as 40MHz), namely the radiofrequency signal of second frequency sub-band interval (83MHz to 123MHz) is exported, circulation like this, until it is interval to have searched for the whole frequency range of television terminal, thus frequency range interval division is pre-set bandwidths and the frequency sub-band of continuous distribution is interval.
In the present embodiment, by adopting band pass filter, filtering process is carried out to the radiofrequency signal that television terminal receives, continuous change band pass filter allow by signal frequency range, and export the radiofrequency signal of pre-set bandwidths one by one, the radiofrequency signal frequency range interval division that television terminal receives is pre-set bandwidths and the frequency sub-band of continuous distribution is interval, thus with a kind of simple, subregion that mode that is that be easy to realize achieves frequency range interval, thus be conducive to carrying out spectrum analysis to the signal in each frequency sub-band interval.
In addition, on the basis of television terminal channel searching system of the present invention second, third or the 4th embodiment,
Interval division module 20 comprises:
Filter unit 21, for carrying out filtering process by band pass filter to the radiofrequency signal that television terminal receives;
Zoning unit 22, for exporting the radiofrequency signal of pre-set bandwidths one by one, with by frequency range interval division for pre-set bandwidths and the frequency sub-band of continuous distribution is interval.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that above-described embodiment method can add required general hardware platform by software and realize, hardware can certainly be passed through, but in a lot of situation, the former is better execution mode.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product is stored in a storage medium (as ROM/RAM, magnetic disc, CD), comprising some instructions in order to make a station terminal equipment (can be mobile phone, computer, server, air conditioner, or the network equipment etc.) perform the method for each embodiment of the present invention.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a television terminal channel search method, is characterized in that, described television terminal channel search method comprises:
When tuning instruction being detected, the frequency range obtaining the radiofrequency signal that television terminal receives is interval;
Described frequency range interval division is pre-set bandwidths and the frequency sub-band of continuous distribution is interval;
One by one spectrum analysis is carried out to the radiofrequency signal in described frequency sub-band interval, obtain the vision carrier frequency point in the spectrogram in frequency sub-band interval described in each;
Carrying out tuning according to vision carrier frequency point described in each, is channel carrier frequency point by the frequency point setting after confirming through tuning.
2. television terminal channel search method as claimed in claim 1, is characterized in that, describedly carries out tuning according to vision carrier frequency point described in each, the step that the carrier frequency point after confirming is set to channel carrier frequency point is comprised through tuning:
With default fine setting step-length, all frequencies in fine setting bandwidth range are preset to each described vision carrier frequency point and carries out demodulation;
Each described vision carrier frequency point being preset the frequency point setting that in fine setting bandwidth range, signal strength signal intensity is maximum is channel carrier frequency point.
3. television terminal channel search method as claimed in claim 1, is characterized in that, described when tuning instruction being detected, and the step obtaining the frequency range interval of the radiofrequency signal that television terminal receives comprises:
When tuning instruction being detected, the national information that the current location of acquisition residing for television terminal is corresponding;
According to the described national information obtained, obtain corresponding frequency range interval, using interval for interval for this frequency range frequency range as the radiofrequency signal of the current reception of television terminal.
4. television terminal channel search method as claimed in claim 1, is characterized in that, describedly carries out spectrum analysis to the radiofrequency signal in described frequency sub-band interval one by one, and the step obtaining the vision carrier frequency point in the spectrogram in frequency sub-band interval described in each comprises:
One by one spectrum analysis is carried out to the radiofrequency signal in described frequency sub-band interval, when the Frequency point in described frequency sub-band interval has signal spectrum, using this Frequency point as potential frequency;
If the Frequency point that this potential frequency of interval presets frequency range interval also has signal spectrum, then described potential frequency is set to vision carrier frequency point, to obtain the vision carrier frequency point in the spectrogram in frequency sub-band interval described in each.
5. the television terminal channel search method as described in Claims 1-4 any one, is characterized in that, describedly by described frequency range interval division is that signal bandwidth is pre-set bandwidths and the step in the frequency sub-band interval of continuous distribution comprises:
By band pass filter, filtering process is carried out to the radiofrequency signal that television terminal receives;
Export the radiofrequency signal of pre-set bandwidths one by one, with by described frequency range interval division for pre-set bandwidths and the frequency sub-band of continuous distribution is interval.
6. a television terminal channel searching system, is characterized in that, described television terminal channel searching system comprises:
Interval acquisition module, for when tuning instruction being detected, the frequency range obtaining the radiofrequency signal that television terminal receives is interval;
Interval division module, is pre-set bandwidths by described frequency range interval division and the frequency sub-band of continuous distribution is interval;
Spectrum analysis module, carries out spectrum analysis to the radiofrequency signal in described frequency sub-band interval one by one, obtains the vision carrier frequency point in the spectrogram in frequency sub-band interval described in each;
Frequency point setting after confirming through tuning, for carrying out tuning according to vision carrier frequency point described in each, is channel carrier frequency point by channel fix module.
7. television terminal channel searching system as claimed in claim 6, it is characterized in that, described channel fix module comprises:
Fine-adjusting unit, for default fine setting step-length, presets all frequencies in fine setting bandwidth range to each described vision carrier frequency point and carries out demodulation;
Setting unit is channel carrier frequency point for each described vision carrier frequency point being preset the frequency point setting that in fine setting bandwidth range, signal strength signal intensity is maximum.
8. television terminal channel searching system as claimed in claim 6, it is characterized in that, described interval acquisition module comprises:
First acquiring unit, for when tuning instruction being detected, the national information that the current location of acquisition residing for television terminal is corresponding;
Second acquisition unit, for according to described national information, obtains corresponding frequency range interval, using interval for interval for this frequency range frequency range as the radiofrequency signal of the current reception of television terminal.
9. television terminal channel searching system as claimed in claim 6, it is characterized in that, described spectrum analysis module comprises:
First analytic unit, for carrying out spectrum analysis to the radiofrequency signal in described frequency sub-band interval one by one, when the Frequency point in described frequency sub-band interval has signal spectrum, using this Frequency point as potential frequency;
Second analytic unit, if the Frequency point presetting frequency range interval for this potential frequency of interval also has signal spectrum, is then set to vision carrier frequency point by described potential frequency, to obtain the vision carrier frequency point in the spectrogram in frequency sub-band interval described in each.
10. the television terminal channel searching system as described in claim 6 to 9 any one, is characterized in that, described interval division module comprises:
Filter unit, for carrying out filtering process by band pass filter to the radiofrequency signal that television terminal receives;
Zoning unit, for exporting the radiofrequency signal of pre-set bandwidths one by one, with by described frequency range interval division for pre-set bandwidths and the frequency sub-band of continuous distribution is interval.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510952919.5A CN105516798B (en) | 2015-12-17 | 2015-12-17 | Television terminal channel search method and system |
| PCT/CN2016/084490 WO2017101264A1 (en) | 2015-12-17 | 2016-06-02 | Channel searching method and system for television terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510952919.5A CN105516798B (en) | 2015-12-17 | 2015-12-17 | Television terminal channel search method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105516798A true CN105516798A (en) | 2016-04-20 |
| CN105516798B CN105516798B (en) | 2019-03-01 |
Family
ID=55724383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510952919.5A Active CN105516798B (en) | 2015-12-17 | 2015-12-17 | Television terminal channel search method and system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105516798B (en) |
| WO (1) | WO2017101264A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106658165A (en) * | 2016-12-09 | 2017-05-10 | 广州视源电子科技股份有限公司 | Television channel search method and device |
| WO2017101264A1 (en) * | 2015-12-17 | 2017-06-22 | 深圳Tcl数字技术有限公司 | Channel searching method and system for television terminal |
| CN108880720A (en) * | 2017-04-01 | 2018-11-23 | 建荣半导体（深圳）有限公司 | Radio equipment automatic channel search method, device and radio equipment |
| CN108989719A (en) * | 2018-06-29 | 2018-12-11 | 广州视源电子科技股份有限公司 | Channel search method, system, readable storage medium storing program for executing and smart television |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211861B (en) * | 2020-01-19 | 2023-03-28 | 成都立鑫新技术科技有限公司 | Signal interference method of mobile terminal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1615004A (en) * | 2004-09-03 | 2005-05-11 | 杭州国芯科技有限公司 | Automatic channel searching method in digital Tv-set |
| CN1615005A (en) * | 2003-11-04 | 2005-05-11 | 台达电子工业股份有限公司 | Tv-set channel searching method |
| EP1926309A1 (en) * | 2006-11-27 | 2008-05-28 | Benq Corporation | Method and apparatus of locating programs in a frequency band |
| CN102186040A (en) * | 2011-05-13 | 2011-09-14 | 四川长虹电器股份有限公司 | Quick channel searching method for digital analog television integrated machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10331294B3 (en) * | 2003-07-10 | 2005-02-17 | Infineon Technologies Ag | Method and arrangement for fast frequency search in broadband mobile radio receivers |
| CN101674440B (en) * | 2008-09-12 | 2012-03-21 | 深圳Tcl新技术有限公司 | Method for processing digital television signal offset |
| WO2010082911A1 (en) * | 2009-01-15 | 2010-07-22 | Thomson Licensing | Method and apparatus for managing a frequency spectrum |
| US9380251B2 (en) * | 2009-06-04 | 2016-06-28 | Mediatek Inc. | Method for performing channel scan within a multi-channel broadcasting program receiver, and associated multi-channel broadcasting program receiver |
| CN102164259A (en) * | 2011-02-01 | 2011-08-24 | 华为终端有限公司 | Television program searching method, receiving method as well as related equipment and system |
| CN105516798B (en) * | 2015-12-17 | 2019-03-01 | 深圳Tcl数字技术有限公司 | Television terminal channel search method and system |
-
2015
- 2015-12-17 CN CN201510952919.5A patent/CN105516798B/en active Active
-
2016
- 2016-06-02 WO PCT/CN2016/084490 patent/WO2017101264A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1615005A (en) * | 2003-11-04 | 2005-05-11 | 台达电子工业股份有限公司 | Tv-set channel searching method |
| CN1615004A (en) * | 2004-09-03 | 2005-05-11 | 杭州国芯科技有限公司 | Automatic channel searching method in digital Tv-set |
| EP1926309A1 (en) * | 2006-11-27 | 2008-05-28 | Benq Corporation | Method and apparatus of locating programs in a frequency band |
| CN102186040A (en) * | 2011-05-13 | 2011-09-14 | 四川长虹电器股份有限公司 | Quick channel searching method for digital analog television integrated machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017101264A1 (en) * | 2015-12-17 | 2017-06-22 | 深圳Tcl数字技术有限公司 | Channel searching method and system for television terminal |
| CN106658165A (en) * | 2016-12-09 | 2017-05-10 | 广州视源电子科技股份有限公司 | Television channel search method and device |
| CN108880720A (en) * | 2017-04-01 | 2018-11-23 | 建荣半导体（深圳）有限公司 | Radio equipment automatic channel search method, device and radio equipment |
| CN108989719A (en) * | 2018-06-29 | 2018-12-11 | 广州视源电子科技股份有限公司 | Channel search method, system, readable storage medium storing program for executing and smart television |
| CN108989719B (en) * | 2018-06-29 | 2021-06-25 | 广州视源电子科技股份有限公司 | Channel searching method and system, readable storage medium and smart television |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105516798B (en) | 2019-03-01 |
| WO2017101264A1 (en) | 2017-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105516798A (en) | Channel search method and system for television terminal | |
| CN111585671B (en) | Electric power LTE wireless private network electromagnetic interference monitoring and identifying method | |
| US6434186B2 (en) | Priority channel search based on spectral analysis and signal recognition | |
| CN101478656B (en) | Co-channel interference filtering method and apparatus therefor | |
| CN109981186B (en) | Ultrashort wave full-frequency band signal sorting method | |
| CN103338048B (en) | Reception method and unit of radio frequency front end of cognitive spectrum sensing receiver | |
| US20110122831A1 (en) | Apparatus and method for providing bandwidth of cognitive radio system | |
| CN103929260A (en) | Analysis method for abnormal radio frequency points | |
| CN103634881A (en) | Frequency point searching method and apparatus, and terminal | |
| CN106788506A (en) | A kind of broadband integration reconnaissance receiver and its method of work | |
| CN104833854A (en) | Sweep frequency type spectrum analyzer and frequency sweep method thereof | |
| WO2023011288A1 (en) | Signal processing system and method | |
| TWI575976B (en) | Wireless device and search method of multi mobile communication networks using the same | |
| CN106353594B (en) | A kind of fast multiresolution frequency spectrum analysis system and method | |
| CN106912056B (en) | 230MHz micro base station and networking method thereof | |
| CN103051759B (en) | Circuit structure capable of realizing multi-standard mobile phone signal identification function | |
| Yagoub et al. | Low cost sdr receiver implementation using rtl-sdr dongle | |
| CN203326988U (en) | Radio frequency front-end unit of cognitive spectrum sensing receiver | |
| EP3240271A1 (en) | Grounding adjustment method and device | |
| US8606189B2 (en) | System and method for wideband wireless system scanning | |
| US20220321160A1 (en) | Wave limiting circuit, and pre-calibration method, dynamic correction method, and apparatuses therefor | |
| US9900035B2 (en) | Detection apparatus, receiving apparatus, and detection method | |
| CN114158101A (en) | 5G and WiFi frequency band switching method, device, equipment and storage medium | |
| CN103731904A (en) | Method and device for controlling frequency point search and network side device and terminal | |
| CN109639376B (en) | Frequency spectrum scanning method of electric power wireless private network system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |