CN103442274B - A kind of satellite signal receiving apparatus and method - Google Patents
A kind of satellite signal receiving apparatus and method Download PDFInfo
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- CN103442274B CN103442274B CN201310376318.5A CN201310376318A CN103442274B CN 103442274 B CN103442274 B CN 103442274B CN 201310376318 A CN201310376318 A CN 201310376318A CN 103442274 B CN103442274 B CN 103442274B
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Abstract
The present invention is applied to satellite communication field, more particularly to a kind of satellite signal receiving apparatus and method, and methods described comprises the steps：Played out when the first tuning demodulator receives satellite-signal, when second tune modulator need not carry out satellite of the signal of imprinting or imprinting from the first tuning modulator reception, the satellite signal receiving of second tune modulator is closed, the satellite-signal ring cutting that the first tuning modulator is received to second tune modulator.The present invention is played out and imprinting by only receiving the identical or different program under same satellite using a signal source to program.
Description
Technical field
The invention belongs to satellite communication field, more particularly to a kind of satellite signal receiving apparatus and method.
Background technology
In routine use, user has recording function increasingly to pay attention in DVB utensil, in existing satellite reception
If the program of imprinting and the program of broadcasting be not on a frequency in device, it is necessary to double using the machine of double tunning modulator
One of tuning modulator is used to play out in tuning modulator, and another tuning modulator is used to carry out imprinting.
It is actual in use, DVB is modulated using the tuning modulator of two-way independence mostly, in this case two
Road signal is actually completely self-contained, and equivalent to two tuning modulators are independently operated parallel, if two tunings are adjusted
What device processed was received is different satellite-signals, is also now that two tuning modulators are independently operated parallel, simultaneously because two
It is individual tuning modulator receive be identical satellite-signal, easily receive signal when produce larger interference, to user with
Carry out greatly inconvenience.
The content of the invention
The purpose of the embodiment of the present invention is to provide a kind of satellite signal receiving apparatus and method, tuned for above-mentioned two-way
Modulator easily produces interference when receiving same satellite-signal, it is impossible to effective imprinting program different with same satellite-signal is played
The problem of, by only receiving the signal from same satellite signal source using tuning modulator all the way, and then effectively broadcast
Put and imprinting.
The embodiment of the present invention is achieved in that a kind of satellite signal receiving apparatus, including the first tuning modulator and the
Two tuning modulator two-way tuning modulators, described device also includes tuning the switching circuit that modulator is connected with two-way respectively,
Played out when the first tuning demodulator receives satellite-signal, second tune modulator need not carry out the letter of imprinting or imprinting
During number from the satellite that the first tuning modulator is received, the satellite signal receiving of second tune modulator, switching electricity are closed
The satellite-signal ring cutting that road receives the first tuning modulator is to second tune modulator.
Further, when described device needs imprinting different satellite-signal, second tune modulator reopens satellite
Signal is received, and the signal that second tune modulator is received is switched back into second tune modulator by the switching circuit.
Further, include per tuning modulator all the way：Signal source, power supply circuit, tuner, modulation circuit, wherein
The signal source, tuner, modulation circuit are sequentially connected, and the power supply circuit is connected with signal source, and signal source is powered
Or power-off, by controlling the power supply open signal source satellite signal receiving to signal source, by controlling the power-off control to signal source
Signal source processed closes satellite signal receiving.
Further, the switching circuit is two, respectively the first switching circuit and the second switching circuit, wherein first
Switching circuit is connected between the signal source of the first tuning modulator and tuner, and with first tuning modulator power supply circuit
And the tuner connection of second tune modulator, power supply circuit of first switching circuit in the described first tuning modulator
When being powered off to signal source, the tuner of second tune modulator is switched to；
Second switching circuit is connected between the signal source of second tune modulator and tuner, and is modulated with second tune
The tuner connection of the power supply circuit of device and the first tuning modulator, second switching circuit is modulated in the second tune
When the power supply circuit of device is powered off to signal source, the tuner of the first tuning modulator is switched to.
Further, described device also include central processing unit, the central processing unit by I2C buses respectively with two-way
Tuner, modulator and the power supply circuit connection of modulator are tuned, the central processing unit is not required in second tune modulator
When carrying out satellite of the signal of imprinting or imprinting from the first tuning modulator reception, the confession of second tune modulator is controlled
Circuit is powered off to signal source, and the central processing unit is when second tune modulator needs the different satellite-signal of imprinting, control
The power supply circuit of second tune modulator processed is powered again to signal source.
Further, the switching circuit is single-pole double-throw switch (SPDT) integrated circuit.
The another object of the embodiment of the present invention is to provide a kind of satellite signal reception method, and the satellite signal receiving is used
First tuning modulator and second tune modulator two-way tuning modulator, methods described comprise the steps：
When the first tuning demodulator receive satellite-signal play out, second tune modulator need not carry out imprinting or
During the satellite that the signal of imprinting is received from the first tuning modulator, the satellite signal receiving of second tune modulator is closed, will
The satellite-signal ring cutting that first tuning modulator is received is to second tune modulator.
Further, also comprise the following steps：When needing the different satellite-signal of imprinting, second tune modulator is again
Satellite-signal is received, the signal that second tune modulator is received switches back into second tune modulator.
Further.First tuning demodulator receive satellite-signal play out including：Receive under same satellite
Different programme signals under same programme signal and same satellite.
Further, methods described is switched in second tune modulator and receives the first satellite-signal step for tuning modulator
Also include after rapid：
First tuning modulator receives the signal input of satellite；
First tuning modulator and second tune modulator are respectively completed the parsing to signal, and the signal after parsing is divided
Do not play out and imprinting.
The present invention is connected by a kind of satellite signal receiving apparatus and method by the signal for changing original DVB
Mode so that when recording programs and broadcasting program come from same satellite signal source, received by tuning device processed all the way come signal,
Broadcasting and imprinting that the identical or different TV programme signal come is distinguished are received to tuning device processed all the way afterwards, double adjust is reduced
The power consumption of humorous modulator so that double tunning modulator is more stablized and reliable in the TV programme under receiving same satellite.
Brief description of the drawings
Fig. 1 is a kind of structure chart for satellite signal receiving apparatus that first embodiment of the invention is provided；
Fig. 2 is a kind of rectification circuit signal for satellite signal receiving apparatus switching circuit that first embodiment of the invention is provided
The structure chart of figure；And
Fig. 3 is a kind of implementation process figure for satellite signal reception method that second embodiment of the invention is provided.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.The satellite signal receiving apparatus, including the first tuning modulator and second tune modulator two-way are adjusted
Humorous modulator, in addition to the switching circuit that modulator is connected is tuned with two-way respectively.The satellite signal receiving apparatus, when the first tune
Humorous demodulator receives satellite-signal and played out, and second tune modulator need not carry out the signal of imprinting or imprinting from the
During the satellite that one tuning modulator is received, the satellite signal receiving of second tune modulator is closed, switching circuit is tuned first
The satellite-signal ring cutting that modulator is received is to second tune modulator.
In addition, when satellite signal receiving apparatus needs the different satellite-signal of imprinting, i.e., second tune modulator needs
When receiving other satellite-signals and carrying out imprinting, second tune modulator reopens satellite signal receiving, and switching circuit is by second
The signal that tuning modulator is received switches back into second tune modulator.
Certainly, the first tuning modulator can be exchanged with second tune modulator, i.e., second tune modulator receives satellite
Signal is played out, and the first tuning modulator imprinting, switching circuit is adjusted according to the situation of the first tuning modulator imprinting by first
Humorous modulator ring cutting is to second tune modulator or switches back into the first tuning modulator.
Implementing for the present invention is described in detail below in conjunction with specific embodiment：
Embodiment one：
Fig. 1 shows a kind of structure chart for satellite signal receiving apparatus that first embodiment of the invention is provided, for the ease of
Illustrate, illustrate only the part related to the embodiment of the present invention.
Satellite signal receiving apparatus includes two-way and tunes modulator respectively, is the first tuning modulator and second tune modulation
Device, each of which road tuning modulator includes signal source, tuner, modulation circuit and power supply circuit.Per tuning modulation all the way
The signal source of device, tuner, modulation circuit are sequentially connected.Power supply circuit is connected with signal source, and signal source is powered or broken
Electricity, by controlling the power supply open signal source satellite signal receiving to signal source, by controlling the power-off to signal source to control to believe
Satellite signal receiving is closed in number source.Specific first tuning modulator includes：Signal source 1, power supply circuit 1, tuner 1, modulation
Circuit 1.Second tune modulator includes：Signal source 2, power supply circuit 2, tuner 2, modulation circuit 2.
The switching circuit of satellite signal receiving apparatus is two, respectively the first switching circuit 1 and the second switching circuit 2.
Specifically, the first switching circuit 1 is connected between the signal source 1 of the first tuning modulator and tuner 1, and adjusted with the first tuning
The power supply circuit 1 of device processed and the tuner 2 of second tune modulator are connected.First switching circuit 1 tunes modulator first
Power supply circuit 1 when being powered off to signal source 1, the tuner 2 of second tune modulator is switched to, by the satellite-signal of tuner 2
Ring cutting is to tuner 1.Second switching circuit 2 is connected between the signal source 2 of second tune modulator and tuner 2, and with
The tuner 1 of the tuning modulator of power supply circuit 2 and first of two tuning modulators is connected.Second switching circuit 2 is adjusted second
When the power supply circuit 2 of humorous modulator is powered off to signal source 2, the tuner 1 of the first tuning modulator is switched to, by tuner 1
Satellite-signal ring cutting is to tuner 2.
Switching circuit is to be automatically selected to cut according to the electric power thus supplied of signal source in the specific implementation process that the present invention is designed
Change switch, the electric power thus supplied of signal source is according to whether imprinting or imprinting which kind of satellite-signal are determined.Wherein to the confession of signal source
The judgement of electric situation is the power supply or power-off to signal source according to power supply circuit.Situation about being powered in power supply circuit to signal source
Under, signal source can directly receive the signal of satellite transmission, and signal source passes signal after the signal of satellite transmission is received
The defeated switching circuit to connection, is then transferred to tuner and modulation circuit again；The feelings powered off in power supply circuit to signal source
Under condition, the signal source of power-off no longer receives satellite-signal, and the switching circuit being connected with the signal source switches to the tuning on another road
On device, the signal that the tuner ring cutting of another road tuning modulator goes out is received.
Satellite-signal is received with the first tuning modulator to play out for example, when the first tuning modulator receives satellite
When signal is played out, the power supply circuit 1 of the first tuning modulator is powered to signal source 1, and signal source 1 receives satellite-signal.The
When two tuning modulators need not carry out satellite of the signal of imprinting or imprinting from the first tuning modulator reception, it is shut off
The satellite signal receiving of second tune modulator, the now receiving of power supply circuit 2 control is powered off to signal source 2, and switching circuit 2 is in letter
When number source 2 is powered off, tuner 1 is switched to, is connected with tuner 1, the satellite-signal ring cutting of tuner 1 to second tune is modulated
The tuner 2 of device, the satellite-signal of a signal source is shared with the first tuning modulator.
When second tune modulator needs the different satellite-signal of imprinting, now need to open second tune modulator
Satellite reception, power supply circuit 2 receives control and restarts power supply to signal source 2, and signal source 2 starts to receive satellite-signal.Switching
Circuit 2 detects signal source 2 when powering again, is connected by being connected to switch back into again with tuner 1 with signal source 2, second tune
Modulator carries out imprinting to different satellite-signals..
Switching circuit in use switching circuit input only be connected with signal source or only with another road tuning
Device is connected, and when the signal source unpowered that switching circuit is connected, switching circuit automatically switches to be connected with switching circuit another
On the tuner of road tuning modulator, signal reception is carried out from another road tuner, and when the signal source of switching circuit connection
When having power supply, where switching circuit is connected in the signal source of tuning modulator, signal reception is carried out from the signal source of connection.
In the specific implementation process that the present invention is designed, the satellite receiver also includes central processing unit, center processing
Tuner, modulator and the power supply circuit that device tunes modulator with two-way respectively by I2C buses are connected.Central processing unit exists
When second tune modulator need not carry out satellite of the signal of imprinting or imprinting from the first tuning modulator reception, control
The power supply circuit of second tune modulator is powered off to signal source.Central processing unit needs imprinting different in second tune modulator
During satellite-signal, the power supply circuit of control second tune modulator is powered again to signal source.
In further embodiment, switching circuit can select radio frequency single-pole double-throw switch (SPDT) integrated circuit (SPDT),
And the logic controlled then needs the 3.3V by the way that the power supply 13V/18V of signal source to be converted into digital logic signal, and need
By 22KHz target signal filters.The rectification circuit of specific switching circuit as shown in Fig. 2 the signal of power supply circuit passes through resistance current limliting,
Capacitor filtering, voltage-stabiliser tube voltage stabilizing, final output galvanic current presses signal to connect switching circuit, is set when by input 1
For the input of signal source, it is achieved in that signal source has signal to automatically switch to signal source end, by even during signal source no signal
Connect tuner and receive electric signal input, power supply circuit can be using Allegro companies during concrete implementation of the present invention
A8292 is as design vector, and this pair of low noise frequency reducing conversion voltage-stablizer is monolithic linear/switching regulator, is exclusively used in by same
Power and interface signal are transmitted to two power supply circuit decompressions and changed by shaft cable.By less outer member, while having collection
Into to the boosted switch and compensation circuit in device.A higher switching frequency is selected, to minimize passive filter element
Size, can further reduce cost.Extremely low noise and pulsation figure are can ensure that by using high level element is integrated.Control
System processed controls the power supply of duplex feeding circuit realiration independence using I2C controlling bus, and A8292 supports inside and outside produce
22KHz modes, for realizing DiSEqC（Digital Satellite Equipment Control）Digital satellite equipment control
DiSEqC is produced using outside in system, the design, and A8292 is intended only as bypass functionality and DiSEqC orders is applied into power supply
On, Software for Design can be so simplified, the flexibility of control is added.In embodiments of the present invention, tuner and modulation electricity
Road uses controlling bus I2C, intermediate-freuqncy signal IQ, automatic growth control AGC signals, and combines different tuner and modulation circuit
Different hardware designs can be carried out.
In specific signal control implementation process of the invention, system control carries out signal control by using I2C, passes through
I2C mode, which carries out signal empty packet, can save extra I/O Interface Controllers switching circuit progress circuit switching, to whole
When system is controlled, if during the signal in play signal source 1, the power supply of signal source 1 is in normal power supply state, as normally defended
Star receiver is the same, and whole satellite receiver also supports DisEqc1.0/1.1/1.2/2.0 etc. to order, if need not be carved
Record, the power supply circuit 2 of signal source 2 closes the power supply to signal source 2, if necessary to carry out imprinting to the program played, supplies
Power supply of the circuit 2 to signal source 2 is also at closed mode, and switching circuit 2 is cut automatically according to the electric power thus supplied of signal source 2
Change to tuner 1 and carry out signal reception up, realize the function of playing imprinting same satellite signal source, and it is same if necessary to imprinting
During the program of another road signal under one satellite, power supply of the power supply circuit 2 to signal source 2 is closed, switching circuit 2
Tuner 1 is switched to according to the signal condition of signal source 2 and carries out signal reception up, realizes and plays imprinting same satellite signal source
Different programs function, be then by power supply circuit 2 to signal source 2 when needing to play the different programs under the different satellite of imprinting
Power supply is opened, and can now realize the function for the different programs for playing the different satellite signal sources of imprinting.
The embodiment of the present invention is by the above-mentioned means, a kind of satellite signal receiving apparatus, is received when the first tuning demodulator
Satellite-signal is played out, and second tune modulator need not carry out the signal of imprinting or imprinting from the first tuning modulator
During the satellite of reception, by only being received using the signal source of the one of tuning modulator of double tunning modulator under same satellite
Signal input, the switching circuit that the tuning modulator of signal source is not used is connected to the tuner of another road tuning modulator
On, signal reception is carried out from the tuner of connection, final two travel permits telegon is respectively completed the parsing to signal, and will parsing
Signal afterwards is played out and imprinting respectively so that is only needed to a signal source and is operated, is operated in a signal source
When receiving the identical or different program from same satellite signal source, will not occur two signal sources while receiving from same
The problem of interference being produced during one satellite-signal, while by a signal source reception from the identical of same satellite signal source or not
The power consumption of double tunning modulator can also be reduced with program, one is then being closed when second tune modulator need not carry out imprinting
Signal source is to realize reduction power consumption.
Embodiment two：
Fig. 3 shows a kind of implementation process for satellite signal reception method that second embodiment of the invention is provided, and is described in detail such as
Under：
S301, is played out, second tune modulator need not be carved when the first tuning demodulator receives satellite-signal
During the satellite that the signal of record or imprinting is received from the first tuning modulator, the satellite-signal for closing second tune modulator connects
Receive.
Whether the program that detection is wanted the program of imprinting and played is the signal or second tune sent by same satellite
Modulator need not carry out imprinting, be played out when detecting the first tuning demodulator reception satellite-signal, second tune modulation
During the satellite that the signal that device need not carry out imprinting or imprinting is received from the first tuning modulator, i.e. recording programs and broadcasting
Program closes power supply of the second tune modulator to secondary signal source, wherein it should be noted that two-way in same signal source
Numbering between tuning modulator can be exchanged, it is preferred that close side of the second tune modulator to the power supply in secondary signal source
Formula is to control power supply circuit to close power supply of the power supply circuit of second tune modulator to secondary signal source by central processing unit,
In the satellite reception machine equipment of double tunning modulator, each tuning modulator has a single power supply circuit, is adjusting
During humorous modulator normal work, single power supply circuit is powered to the signal source of tuning modulator, and when signal source is not supplied
When electric, signal source is that can not receive signal, and now signal source is no signal condition.
S302, the satellite-signal ring cutting that the first tuning modulator is received to second tune modulator.
The switching circuit of second tune modulator is automatically switched to be connected with the tuner of the first tuning modulator, and now the
Two tune being inputted by switching circuit from reception signal at the tuner of the first tuning modulator for modulators.
S303, the first tuning modulator receives the signal input of satellite；First tuning modulator and second tune modulator
The parsing to signal is respectively completed, and the signal after parsing is played out and imprinting respectively.
The signal that first tuning modulator is received by the first signal source under same satellite is inputted；Wherein optional first adjusts
Signal input under the same satellite that device processed is received includes：Receive the input of same programme signal and the same satellite under same satellite
Under different programme signals input.Signal is respectively allocated to the first tuner by the first tuner afterwards and second tune device is carried out
Different input signals can be separately dispensed into modulator by central processing unit and carried out by processing, the mode of distribution, Huo Zhezhong
Identical signal is assigned to different modulators and played out and imprinting by central processor, can also be carried out according to information such as frequencies
The tuner and demodulator circuit of automatic distribution, the first tuning modulator and second tune modulator are respectively completed the solution to signal
Analysis, and the signal after parsing is played out and imprinting respectively, realize and the phase under same satellite is only received by a signal source
Same or different programme signals, the broadcasting synchronized to identical or different programme signal and recording function.
The embodiment of the present invention by the above-mentioned means, a kind of satellite signal reception method there is provided a kind of satellite signal receiving side
Method, is played out, second tune modulator need not carry out imprinting or imprinting when the first tuning demodulator receives satellite-signal
Signal received from the first tuning modulator satellite when, by only being received using signal source under same satellite
Identical or different program, the broadcasting and imprinting to program are completed in the case where only one of which signal source carries out normal work, is made
Must be that only one of which signal source can be achieved to synchronize the program under same satellite by way of the double coordinations of mixing
Imprinting and broadcasting.
Can be with one of ordinary skill in the art will appreciate that realizing that all or part of step in above-described embodiment method is
The hardware of correlation is instructed to complete by program, described program can be stored in computer read/write memory medium, institute
The storage medium stated, such as ROM/RAM, disk, CD.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (8)
1. a kind of satellite signal receiving apparatus, including the first tuning modulator and second tune modulator two-way tuning modulator,
Characterized in that, described device also includes tuning the switching circuit that modulator is connected with two-way respectively, when the first tuning demodulator
Receive satellite-signal to play out, second tune modulator need not carry out imprinting or the signal of imprinting is adjusted from the first tuning
During the satellite that device processed is received, the satellite signal receiving of second tune modulator is closed, the switching circuit modulates the first tuning
The satellite-signal ring cutting that device is received is to second tune modulator；
Wherein, include per tuning modulator all the way：Signal source, power supply circuit, tuner, modulation circuit, wherein the signal
Source, tuner, modulation circuit are sequentially connected, and the power supply circuit is connected with signal source, and signal source is powered or powered off, and are led to
Power supply open signal source satellite signal receiving of the control to signal source is crossed, by controlling the power down control signal source to signal source to close
Close satellite signal receiving；
Described device also includes central processing unit, and the central processing unit tunes modulator with two-way respectively by I2C buses
Tuner, modulator and power supply circuit connection, the central processing unit second tune modulator need not carry out imprinting or
During the satellite that the signal of person's imprinting is received from the first tuning modulator, the power supply circuit of second tune modulator is controlled to signal
Source is powered off, and the central processing unit is when second tune modulator needs the different satellite-signal of imprinting, and control second tune is adjusted
The power supply circuit of device processed is powered again to signal source.
2. satellite signal receiving apparatus as claimed in claim 1, it is characterised in that described device needs the different satellite of imprinting
During signal, second tune modulator reopens satellite signal receiving, and the switching circuit receives second tune modulator
Signal switches back into second tune modulator.
3. satellite signal receiving apparatus as claimed in claim 2, it is characterised in that the switching circuit is two, is respectively
First switching circuit and the second switching circuit, wherein the first switching circuit is connected to signal source and the tuning of the first tuning modulator
Between device, and it is connected with the tuner of the first power supply circuit for tuning modulator and second tune modulator, described first cuts
Circuit is changed when the power supply circuit of the described first tuning modulator is powered off to signal source, the tuning of second tune modulator is switched to
Device；
Second switching circuit is connected between the signal source of second tune modulator and tuner, and with second tune modulator
The tuner connection of power supply circuit and the first tuning modulator, second switching circuit is in the second tune modulator
When power supply circuit is powered off to signal source, the tuner of the first tuning modulator is switched to.
4. the device as described in claims 1 to 3 is any, it is characterised in that the switching circuit is that single-pole double-throw switch (SPDT) is integrated
Circuit.
5. a kind of satellite signal reception method, the satellite signal receiving is using the first tuning modulator and second tune modulator two
Road tunes modulator, it is characterised in that methods described comprises the steps：
Played out when the first tuning demodulator receives satellite-signal, second tune modulator need not carry out imprinting or imprinting
Signal from first tuning modulator receive satellite when, close second tune modulator satellite signal receiving, by first
Satellite-signal ring cutting that modulator receives is tuned to second tune modulator；
Wherein, power supply circuit is powered or powered off to signal source, by controlling the power supply open signal source satellite to signal source
Signal is received, by controlling the power down control signal source to signal source to close satellite signal receiving；
Central processing unit need not carry out the signal of imprinting or imprinting from the first tuning modulator in second tune modulator
During the satellite of reception, the power supply circuit of second tune modulator is controlled to power off signal source, the central processing unit is adjusted second
When humorous modulator needs imprinting different satellite-signal, the power supply circuit of control second tune modulator is supplied signal source again
Electricity.
6. satellite signal reception method as claimed in claim 5, it is characterised in that also comprise the following steps：When needing imprinting
During different satellite-signal, second tune modulator receives satellite-signal again, the signal switching that second tune modulator is received
Return second tune modulator.
7. method as claimed in claim 5, it is characterised in that first tuning demodulator receives satellite-signal and played out
Including：Receive the different programme signals under the same programme signal and same satellite under same satellite.
8. method as claimed in claim 5, it is characterised in that methods described is switched to reception first in second tune modulator
Also include after the satellite-signal step for tuning modulator：
First tuning modulator receives the signal input of satellite；
First tuning modulator and second tune modulator are respectively completed the parsing to signal, and the signal after parsing is entered respectively
Row is played and imprinting.
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| CN201310376318.5A CN103442274B (en) | 2013-08-26 | 2013-08-26 | A kind of satellite signal receiving apparatus and method |
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| CN201310376318.5A CN103442274B (en) | 2013-08-26 | 2013-08-26 | A kind of satellite signal receiving apparatus and method |
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| CN103442274B true CN103442274B (en) | 2017-11-07 |
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| CN114025223B (en) * | 2021-11-15 | 2023-10-13 | 海信电子科技（深圳）有限公司 | Channel switching method under video recording state and display equipment |
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| CN1845588A (en) * | 2005-04-08 | 2006-10-11 | 现代奥途纳特株式会社 | Device and method for automatically changing broadcast channel of vehicle television with diversity antenna |
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