CN102625227A - Signal extension system and transmitting end and receiving end thereof - Google Patents
Signal extension system and transmitting end and receiving end thereof Download PDFInfo
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- CN102625227A CN102625227A CN2011102170037A CN201110217003A CN102625227A CN 102625227 A CN102625227 A CN 102625227A CN 2011102170037 A CN2011102170037 A CN 2011102170037A CN 201110217003 A CN201110217003 A CN 201110217003A CN 102625227 A CN102625227 A CN 102625227A
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Abstract
A signal extension system and a transmitting end and a receiving end thereof are provided. The signal extension system comprises a transmitting end and a receiving end. The transmitting end comprises a modulation circuit and a first interface. The modulation circuit includes a first modulator and a second modulator. The first modulator modulates a left channel signal according to a carrier signal having a first frequency band to generate a left channel modulated signal, and the second modulator modulates a right channel signal according to a carrier signal having a second frequency band to generate a right channel modulated signal. The first interface is coupled with the modulation circuit. The receiving end comprises a second interface and a demodulation circuit. The demodulation circuit is coupled to the second interface and demodulates the left channel modulation signal and the right channel modulation signal to output a left channel signal and a right channel signal, respectively. The first interface and the second interface are electrically connected.
Description
Technical field
The invention relates to a kind of signal extension system and transmission end and receiving terminal, and particularly relevant for a kind of transmission stereosonic signal extension system and transmission end and receiving terminal.
Background technology
Please with reference to Fig. 1, Fig. 1 illustrates the sketch map into the classical signals stretch system.Signal extension system 1 comprises transmission end 2, receiving terminal 3 and grid line 4.Transmission end 2 electrically connects through grid line 4 and receiving terminal 3.Transmission end 2 comprises differential drive 21 and interface 22, and receiving terminal 3 comprises differential receiver 31 and interface 32.Grid line 4 comprises twisted pair wire 41 to 48, and twisted pair wire 41 to 48 electrically connects interface 22 and interface 32.Twisted pair wire 41 to 46 is in order to the transmission video signal, and twisted pair wire 47 and 48 is for example in order to transmission differential signal A+ and A-.Further, twisted pair wire 41 and 42 is in order to transmit red video signal data, and twisted pair wire 43 and 44 is in order to transmit green video signal data, and twisted pair wire 45 and 46 is in order to transmit blue video signal data. Twisted pair wire 47 and 48 are in order to transmit differential wave A+ and A-.
Differential drive 21 converts tone signal A into differential wave A+ and A-exports interface 22 to, and differential wave A+ and A-also are passed to interface 32 through twisted pair wire 47 and 48 respectively.Differential receiver 31 receives differential wave A+ and A-from interface 32, and converts differential wave A+ and A-into tone signal output.Therefore yet the classical signals stretch system only can transmit tone signal, and can't transmit stereoly, the user can't be provided preferable sound field effect.
Summary of the invention
The present invention can transmit stereo to improve the shortcoming that the classical signals stretch system can only transmit tone signal relevant for a kind of signal extension system and transmission end and receiving terminal.
According to the present invention, a kind of signal extension system is proposed.The signal extension system comprises transmission end and receiving terminal.The transmission end comprises the modulation circuit and first interface.Modulation circuit comprises first modulator and second modulator.First modulator is modulated left channel signals with generation L channel modulation signal according to the carrier signal with first frequency range, and second modulator is modulated right-channel signals to produce the R channel modulation signal according to the carrier signal with second frequency range.First interface system couples modulation circuit.Receiving terminal comprises second interface and demodulator circuit.Demodulator circuit system couples second interface, and respectively demodulation L channel modulation signal and R channel modulation signal with output left channel signals and right-channel signals.First interface and second interface electrically connect.
According to the present invention, a kind of signal extension system is proposed.The signal extension system comprises transmission end and receiving terminal.The transmission end comprises the modulation circuit and first interface.Modulation circuit comprises that first modulator, second modulator and differential wave produce circuit.First modulator is modulated left channel signals with generation L channel modulation signal according to the carrier signal with first frequency range, and second modulator is modulated right-channel signals to produce the R channel modulation signal according to the carrier signal with one second frequency range.Differential wave produces circuit and produces differential wave according to L channel modulation signal and R channel modulation signal.First interface is in order to the output differential wave.Receiving terminal comprises second interface and demodulator circuit.Second interface is in order to receive differential wave.Demodulator circuit comprises demultiplexing circuit and demodulation module.Demultiplexing circuit is separated into L channel modulation signal and R channel modulation signal according to first frequency range and second frequency range with differential wave.Demodulation module difference demodulation L channel modulation signal and R channel modulation signal are with output left channel signals and right-channel signals.
According to the present invention, the transmission end of a kind of signal extension system is proposed.The transmission end of signal extension system comprises a modulation circuit and an interface.Modulation circuit comprises first modulator and second modulator.First modulator is modulated left channel signals with generation L channel modulation signal according to the carrier signal with first frequency range, and second modulator is modulated right-channel signals to produce the R channel modulation signal according to the carrier signal with second frequency range.This interface couples modulation circuit.
According to the present invention, the receiving terminal of a kind of signal extension system is proposed.The receiving terminal of signal extension system comprises an interface and demodulator circuit.This interface receives differential wave.Demodulator circuit comprises demultiplexing circuit and demodulation module.Demultiplexing circuit is separated into L channel modulation signal and R channel modulation signal according to first frequency range and second frequency range with differential wave.Demodulation module difference demodulation L channel modulation signal and R channel modulation signal are with output left channel signals and right-channel signals.
For there is better understanding above-mentioned and other aspects of the present invention, hereinafter is special lifts preferred embodiment, and cooperates appended graphicly, elaborates as follows:
Description of drawings
Fig. 1 illustrates the sketch map into the classical signals stretch system.
Fig. 2 illustrates and is the sketch map according to a kind of signal extension of the present invention system.
Fig. 3 illustrates the sketch map into the signal extension system that accordings to first embodiment of the invention.
It is the sketch map of first kind of modulation circuit that Fig. 4 illustrates.
Fig. 5 illustrates the waveform sketch map into left channel signals, carrier signal and L channel modulation signal.
Fig. 6 illustrates the waveform sketch map into right-channel signals, carrier signal and R channel modulation signal.
It is the sketch map of first kind of demodulator circuit that Fig. 7 illustrates.
Fig. 8 illustrates the waveform sketch map into rectified signal SL6 and filtering signal SL3.
Fig. 9 illustrates the waveform sketch map into rectified signal SR6 and filtering signal SR3.
Figure 10 illustrates the sketch map into the signal extension system that accordings to second embodiment of the invention.
Figure 11 illustrates the sketch map into the signal extension system that accordings to third embodiment of the invention.
It is the sketch map of second kind of modulation circuit that Figure 12 illustrates.
It is the sketch map of second kind of demodulator circuit that Figure 13 illustrates.
Figure 14 illustrates the sketch map into the signal extension system that accordings to fourth embodiment of the invention.
[main element symbol description]
1: the classical signals stretch system
2,6,6a, 6b, 6c, 6d: transmission end
3,7,7a, 7b, 7c, 7d: receiving terminal
4: grid line
5,5a, 5b, 5c, 5d: according to the signal extension system of the embodiment of the invention
21: differential drive
22,32,62,72: interface
31: differential receiver
41～48: twisted pair wire
61a, 61b: modulation circuit
63: booster circuit
71a, 71b: demodulator circuit
73: reduction voltage circuit
611,612: modulator
613: adder
614: circuit is moved in single-ended slip
615: differential wave produces circuit
711: half-wave rectifying circuit
712: low-pass filter circuit
713: direct current is removed circuit
714: differential commentaries on classics single-end circuit
715: the L channel filter
716: the R channel filter
717: demultiplexing circuit
6111,6121: adder
6112,6122: mixer
A: tone signal
A+, A-, D1, D2: differential wave
SL1: left channel signals
SR1: right-channel signals
SL2, SR2: the direct current position is accurate
SL3, SR3: filtering signal
SL4: carrier signal with first frequency range
SR4: carrier signal with second frequency range
SL5: L channel modulation signal
SR5: R channel modulation signal
SL6, SR6: rectified signal
SL7, SR7, D11, D21: signal
S9: single-ended signal
V1, V2, V3: direct voltage
Embodiment
Please with reference to Fig. 2, Fig. 2 illustrates and is the sketch map according to a kind of signal extension of the present invention system.Signal extension system 5 comprises transmission end 6, receiving terminal 7 and grid line 4.Transmission end 6 electrically connects through grid line 4 and receiving terminal 7, and transmission end 6 for example is to transmit video signal, audio signals, differential wave or electric power signal to receiving terminal 7.
First embodiment
Please with reference to Fig. 3, Fig. 3 illustrates the sketch map into the signal extension system that accordings to first embodiment of the invention.Aforementioned signal extension system 5, transmission end 6 and receiving terminal 7 are represented with the 5a of signal extension system, transmission end 6a and receiving terminal 7a respectively in first embodiment.The 5a of signal extension system comprises transmission end 6a, receiving terminal 7a and grid line 4.Grid line for example is that a twisted-pair feeder (Category 5 cable, CAT-5 line) transmission end 6a comprises modulation circuit 61a and interface 62, and interface 62 is to couple modulation circuit 61a.Modulation circuit 61a produces L channel modulation signal SL5 according to left channel signals SL1, and produces R channel modulation signal SR5 according to right-channel signals SR1.
Receiving terminal 7a comprises demodulator circuit 71a and interface 72, and interface 72 electrically connects through grid line 4 and interface 62.Interface 62 and interface 72 for example are network interface.Grid line 4 comprises twisted pair wire 41 to 48, and twisted pair wire 41 to 48 electrically connects interface 62 and interface 72.Twisted pair wire 41 to 46 is for example in order to the transmission video signal, and twisted pair wire 47 and 48 for example adds electric power signal in order to transmitting audio signal, differential wave or audio signal.For instance, twisted pair wire 41 and 42 is in order to transmit red video signal data, and twisted pair wire 43 and 44 is in order to transmit green video signal data, and twisted pair wire 45 and 46 is in order to transmit blue video signal data.Twisted pair wire 47 and 48 add electric power signal in order to transmit audio signals, differential wave or audio signal.With first embodiment, audio signal is L channel modulation signal SL5 and R channel modulation signal SR5, and L channel modulation signal SL5 and R channel modulation signal SR5 are transmitted by twisted pair wire 47 and 48 respectively.Demodulator circuit 71a couples interface 72.Demodulator circuit 71a with output left channel signals SL1 and right-channel signals SR1, and then produces stereosonic effect in order to respectively demodulation L channel modulation signal SL5 and R channel modulation signal SR5.
The 5a of signal extension system can improve the problem that the classical signals stretch system can only transmit single-tone.In addition, the 5a of signal extension system does not need extra increase micro-control unit (Micro Controller Unit MCU) can reach and transmits stereosonic function, therefore can reduce production costs and increases product competitiveness.
Please be simultaneously with reference to Fig. 4, Fig. 5 and Fig. 6; It is the sketch map of first kind of modulation circuit that Fig. 4 illustrates; Fig. 5 illustrates the waveform sketch map into left channel signals SL4, carrier signal SL1 and L channel modulation signal, and Fig. 6 illustrates the waveform sketch map into right-channel signals SR4, carrier signal SR1 and R channel modulation signal SR5.The modulation system of aforementioned modulation circuit 61a is for example for amplitude modulation, frequency modulation or phase modulation, for following embodiment for the purpose of the convenient explanation is the example explanation with amplitude modulation.Modulation circuit 61a comprises modulator 611 and modulator 612.Modulator 611 is modulated left channel signals SL1 with generation L channel modulation signal SL5 according to the carrier signal SL4 with first frequency range, and modulator 612 is modulated right-channel signals SR1 to produce R channel modulation signal SR5 according to the carrier signal SR4 with second frequency range.First frequency range can be different frequency ranges with second frequency range.For instance, first frequency range for example is 1MHz, and second frequency range for example is 2MHz.
Further, modulator 611 further comprises adder 6111 and mixer 6112, and modulator 612 further comprises adder 6121 and mixer 6122.Adder 6111 produces the left channel signals SL3 of tool flip-flop according to left channel signals SL1 and the accurate SL2 in direct current position.Mixer 6112 is modulated the left channel signals SL3 of tool flip-flop to produce L channel modulation signal SL5 according to the carrier signal SL4 with first frequency range.Similarly, adder 6121 produces the right-channel signals SR3 of tool flip-flop according to right-channel signals SR1 and the accurate SR2 in direct current position.Mixer 6122 is modulated the right-channel signals SR3 of tool flip-flop to produce R channel modulation signal SR5 according to the carrier signal SR4 with second frequency range.
Please be simultaneously with reference to Fig. 7, Fig. 8 and Fig. 9; It is the sketch map of first kind of demodulator circuit that Fig. 7 illustrates; Fig. 8 illustrate into L channel modulation signal SL5 through the rectified signal SL6 of half-wave rectifying circuit 711 back output and through the waveform sketch map of the filtering signal SL3 of low-pass filter circuit 712 back outputs, it is that R channel modulation signal SR5 is through the rectified signal SR6 of half-wave rectifying circuit 711 back outputs and the waveform sketch map of filtering signal SR3 that Fig. 9 illustrates.Demodulator circuit 71a comprises half-wave rectifying circuit 711, low-pass filter circuit 712 and direct current removal circuit 713.Half-wave rectifying circuit 711 is carried out halfwave rectifier with output rectified signal SL6 and rectified signal SR6 to L channel modulation signal SL5 and R channel modulation signal SR5 respectively.Low-pass filter circuit 712 carries out LPF with output filtering signal SL3 and filtering signal SR3 to rectified signal SL6 and rectified signal SR6 respectively.The flip-flop that direct current removal circuit 713 is removed filtering signal SL3 and filtering signal SR3 respectively is with output left channel signals SL1 and right-channel signals SR1.
Second embodiment
Please with reference to Figure 10, Figure 10 illustrates the sketch map into the signal extension system that accordings to second embodiment of the invention.5b of signal extension system and the 5a of signal extension system main difference part are that transmission end 6b more comprises booster circuit 63, and receiving terminal 7b more comprises reduction voltage circuit 73.Booster circuit 63 is direct voltage V2 (for example 20V) in order to direct voltage V1 (for example 5V) is boosted, and exports direct voltage V2 to interface 62.Direct voltage V2 can follow R channel modulation signal SR5 to be passed to interface 72 through interface 62, and direct voltage V2 follows the form of R channel modulation signal SR5 to represent with signal SR7 in Figure 10.Direct voltage V3 for example is an earthed voltage.Another embodiment is if direct voltage V3 is 20V, and direct voltage V2 then is earthed voltage (not being plotted in the diagram).Direct voltage V3 can follow L channel modulation signal SL5 to be passed to interface 72 through interface 62, and direct voltage V3 follows the form of L channel modulation signal SL5 to represent with signal SL7 in Figure 10 system.Aforementioned reduction voltage circuit 73 is in order to be reduced to direct voltage V1 (for example 5V) with direct voltage V2 (for example 20V), and direct voltage V1 can become the power supply of receiving terminal 7b.Hence one can see that, and transmission end 6b can further add that with audio signal electric power signal exports receiving terminal 7b to so that receiving terminal 7b to be provided required power supply supply, reaches cost-effective effect.
The 3rd embodiment
Please be simultaneously with reference to Figure 11, Figure 12 and Figure 13, Figure 11 illustrates the sketch map into the signal extension system that accordings to third embodiment of the invention, and it is the sketch map of second kind of modulation circuit that Figure 12 illustrates, and it is the sketch map of second kind of demodulator circuit that Figure 13 illustrates.5c of signal extension system and the 5a of signal extension system main difference part are that transmission end 6c is different from transmission end 6a; And receiving terminal 7c is different from receiving terminal 7a; Transmission end 6c and transmission end 6a main difference part are that modulation circuit 61b is different from modulation circuit 61a, and receiving terminal 7c and receiving terminal 7a main difference part are that demodulator circuit 71b is different from demodulator circuit 71a.
The 4th embodiment
Please with reference to Figure 14, Figure 14 illustrates the sketch map into the signal extension system that accordings to fourth embodiment of the invention.5d of signal extension system and the 5c of signal extension system main difference part are that transmission end 6d more comprises booster circuit 63, and receiving terminal 7d more comprises reduction voltage circuit 73.Booster circuit 63 is direct voltage V2 (for example 20V) in order to direct voltage V1 (for example 5V) is boosted, and exports direct voltage V2 to interface 62.Direct voltage V2 can follow differential wave D2 to be passed to interface 72 through interface 62, and direct voltage V2 follows the form of differential wave D2 to represent with signal D21 in Figure 14.Direct voltage V3 for example is an earthed voltage.Direct voltage V3 can follow differential wave D1 to be passed to interface 72 through interface 62, and direct voltage V3 follows the form of differential wave D1 to represent with signal D11 in Figure 14.Aforementioned reduction voltage circuit 73 is in order to be reduced to direct voltage V1 with direct voltage V2, and direct voltage V1 can become the power supply of receiving terminal 7d.Hence one can see that, and transmission end 6d can further add that with differential wave electric power signal exports receiving terminal 7d to, so that receiving terminal 7d to be provided required power supply supply, reaches cost-effective effect.
Aforementioned signal extension system can improve the problem that the classical signals stretch system can only transmit single-tone, and (Micro Controller Unit can reach under situation MCU) and transmit stereosonic function not needing extra increase micro-control unit.Thus, can not only reduce production costs, more can increase product competitiveness.Moreover the transmission end of aforementioned signal extension system can further provide receiving terminal required power supply supply, reaches cost-effective effect.
In sum, though the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.Have common knowledge the knowledgeable in the technical field under the present invention, do not breaking away from the spirit and scope of the present invention, when doing various changes and retouching.Therefore, protection scope of the present invention is when being as the criterion with what claim defined.
Claims (25)
1. signal extension system comprises:
One transmission end comprises:
One modulation circuit comprises:
One first modulator, in order to according to one have one first frequency range carrier signal modulate a left channel signals to produce a L channel modulation signal; And
One second modulator, in order to according to one have one second frequency range carrier signal modulate a right-channel signals to produce a R channel modulation signal;
One first interface is to couple this modulation circuit;
One receiving terminal comprises:
One second interface; And
One demodulator circuit is to couple this second interface, this demodulator circuit in order to this L channel modulation signal of demodulation and this R channel modulation signal respectively to export this left channel signals and this right-channel signals;
Wherein, this first interface and this second interface system electrically connects.
2. signal extension as claimed in claim 1 system is characterized in that, more comprises:
One grid line comprises:
A pair of twisted pair wire is in order to electrically connect this first interface and this second interface.
3. signal extension as claimed in claim 1 system is characterized in that this first frequency range and this second frequency range are inequality.
4. signal extension as claimed in claim 1 system is characterized in that this demodulator circuit comprises:
One half-wave rectification circuit is in order to carry out halfwave rectifier to export one first rectified signal and one second rectified signal to this L channel modulation signal and R channel modulation signal respectively;
One low-pass filter circuit is in order to carry out LPF to export one first filtering signal and one second filtering signal to this first rectified signal and this second rectified signal respectively; And
Diffluence dividing circuit always, in order to the flip-flop of removing this first filtering signal and this second filtering signal to export this left channel signals and this right-channel signals.
5. signal extension as claimed in claim 1 system is characterized in that this modulation circuit more comprises:
One adder, in order to this L channel modulation signal of addition and this R channel modulation signal to export a single-ended signal; And
Circuit is moved in one single-ended slip, in order to convert this single-ended signal into a differential wave.
6. signal extension as claimed in claim 5 system is characterized in that this demodulator circuit more comprises:
One differential commentaries on classics single-end circuit is in order to convert this differential wave into this single-ended signal;
One L channel filter, in order to according to this first frequency range to this single-ended signal filtering to export this L channel modulation signal; And
One R channel filter, in order to according to this second frequency range to this single-ended signal filtering to export this R channel modulation signal.
7. signal extension as claimed in claim 6 system is characterized in that this demodulator circuit more comprises:
One half-wave rectification circuit is in order to carry out halfwave rectifier to export one first rectified signal and one second rectified signal to this L channel modulation signal and R channel modulation signal respectively;
One low-pass filter circuit is in order to carry out LPF to export one first filtering signal and one second filtering signal to this first rectified signal and this second rectified signal respectively; And
Diffluence dividing circuit always, in order to the flip-flop of removing this first filtering signal and this second filtering signal to export this left channel signals and this right-channel signals.
8. signal extension as claimed in claim 5 system is characterized in that, this to twisted pair wire in order to transmit this differential wave.
9. signal extension as claimed in claim 1 system is characterized in that, this to twisted pair wire in order to transmit this L channel modulation signal and this R channel modulation signal.
10. signal extension as claimed in claim 1 system is characterized in that this modulation circuit more comprises:
One booster circuit is one second direct voltage in order to one first direct voltage is promoted, and exports this second direct voltage to this first interface.
11. signal extension as claimed in claim 10 system is characterized in that this demodulator circuit more comprises:
One reduction voltage circuit is one the 3rd direct voltage in order to this second direct voltage is reduced.
12. a signal extension system comprises:
One transmission end comprises:
One modulation circuit comprises:
One first modulator, in order to according to one have one first frequency range carrier signal modulate a left channel signals to produce a L channel modulation signal;
One second modulator, in order to according to one have one second frequency range carrier signal modulate a right-channel signals to produce a R channel modulation signal; And
One differential wave produces circuit, in order to produce a differential wave according to this L channel modulation signal and this R channel modulation signal;
One first interface is in order to export this differential wave; And
One receiving terminal comprises:
One second interface is in order to receive this differential wave;
One demodulator circuit comprises:
One demultiplexing circuit is in order to be separated into this L channel modulation signal and this R channel modulation signal according to this first frequency range and this second frequency range with this differential wave;
One demodulation module, this L channel modulation signal of demodulation and this R channel modulation signal are to export this left channel signals and this right-channel signals respectively.
13. signal extension as claimed in claim 1 system is characterized in that more comprise: a grid line comprises:
A pair of twisted pair wire is in order to transmit this differential wave.
14. signal extension as claimed in claim 12 system is characterized in that this first frequency range and this second frequency range are inequality.
15. signal extension as claimed in claim 12 system is characterized in that this demodulation module comprises:
One half-wave rectification circuit is in order to carry out halfwave rectifier to export one first rectified signal and one second rectified signal to this L channel modulation signal and R channel modulation signal respectively;
One low-pass filter circuit is in order to carry out LPF to export one first filtering signal and one second filtering signal to this first rectified signal and this second rectified signal respectively; And
Diffluence dividing circuit always, in order to the flip-flop of removing this first filtering signal and this second filtering signal to export this left channel signals and this right-channel signals.
16. signal extension as claimed in claim 12 system is characterized in that, this differential wave produces circuit and comprises:
One adder, in order to this L channel modulation signal of addition and this R channel modulation signal to export a single-ended signal; And
Circuit is moved in one single-ended slip, in order to convert this single-ended signal into this differential wave.
17. signal extension as claimed in claim 12 system is characterized in that this demultiplexing circuit more comprises:
One differential commentaries on classics single-end circuit is in order to convert this differential wave into this single-ended signal;
One L channel filter, in order to according to this first frequency range to this single-ended signal filtering to export this L channel modulation signal; And
One R channel filter, in order to according to this second frequency range to this single-ended signal filtering to export this R channel modulation signal.
18. signal extension as claimed in claim 12 system is characterized in that this modulation circuit more comprises:
One booster circuit is one second direct voltage in order to one first direct voltage is promoted, and exports this second direct voltage to this first interface.
19. signal extension as claimed in claim 18 system is characterized in that this demodulator circuit more comprises:
One reduction voltage circuit is one the 3rd direct voltage in order to this second direct voltage is reduced.
20. the transmission end of a signal extension system comprises:
One modulation circuit comprises:
One first modulator, in order to according to one have one first frequency range carrier signal modulate a left channel signals to produce a L channel modulation signal;
One second modulator, in order to according to one have one second frequency range carrier signal modulate a right-channel signals to produce a R channel modulation signal; And
One first interface is to couple this modulation circuit.
21. transmission end as claimed in claim 20 is characterized in that, this first interface is connected to a receiving terminal through a grid line.
22. transmission end as claimed in claim 21 is characterized in that, this receiving terminal comprises:
One second interface connects this grid line; And
One demodulator circuit couples this second interface, this demodulator circuit in order to this L channel modulation signal of demodulation and this R channel modulation signal respectively to export this left channel signals and this right-channel signals;
Wherein, this first interface and this second interface electrically connect.
23. the receiving terminal of a signal extension system comprises:
One first interface is in order to receive a differential wave or an electric power signal; And
One demodulator circuit comprises:
One demultiplexing circuit is in order to be separated into a L channel modulation signal and a R channel modulation signal according to one first frequency range and one second frequency range with this differential wave; And
One demodulation module, this L channel modulation signal of demodulation and this R channel modulation signal are to export a left channel signals and a right-channel signals respectively.
24. receiving terminal as claimed in claim 23 is characterized in that, this first interface is connected to a transmission end through a grid line.
25. receiving terminal as claimed in claim 23 is characterized in that, this transmission end comprises:
One modulation circuit comprises:
One first modulator, in order to according to one have this first frequency range this left channel signals of carrier signal modulation to produce this L channel modulation signal;
One second modulator, in order to according to one have this second frequency range this right-channel signals of carrier signal modulation to produce this R channel modulation signal; And
One differential wave produces circuit, in order to produce this differential wave according to this L channel modulation signal and this R channel modulation signal;
One second interface is in order to export this differential wave or an electric power signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100102921A TWI440368B (en) | 2011-01-26 | 2011-01-26 | Signal extending system, and transmitter and receiver thereof |
| TW100102921 | 2011-01-26 |
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| Publication Number | Publication Date |
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| CN102625227A true CN102625227A (en) | 2012-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102170037A Pending CN102625227A (en) | 2011-01-26 | 2011-07-21 | Signal extension system and transmitting end and receiving end thereof |
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| CN (1) | CN102625227A (en) |
| TW (1) | TWI440368B (en) |
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| CN1484389A (en) * | 2002-09-16 | 2004-03-24 | 上海市虹口区兴荣五金电料商店 | High-pesolution stereo phonic signal wireless receiver |
| CN101080061A (en) * | 2006-05-24 | 2007-11-28 | 株式会社日立制作所 | Wireless communication apparatus and wireless communication system |
| CN101106435A (en) * | 2006-07-10 | 2008-01-16 | 华为技术有限公司 | A method for common transfer of multiple pairs and transmission terminal and receiving terminal |
| CN201063858Y (en) * | 2007-04-29 | 2008-05-21 | 普诚科技股份有限公司 | Wireless surrounding system |
| CN101489075A (en) * | 2008-01-15 | 2009-07-22 | 宏正自动科技股份有限公司 | Display signal extending apparatus and method for transmitting display signal therefor |
| CN101630496A (en) * | 2009-03-13 | 2010-01-20 | 深圳市优特普科技有限公司 | Twisted-pair visual frequency or audio frequency signal transmission system with automatic regulation |
| CN201467349U (en) * | 2009-07-06 | 2010-05-12 | 湖州佳视电子设备有限公司 | Common-frequency inter cut frequency modulation device in CATV common cable transmission |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201233200A (en) | 2012-08-01 |
| TWI440368B (en) | 2014-06-01 |
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