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CN102625227A - Signal extension system and transmitting end and receiving end thereof - Google Patents

Signal extension system and transmitting end and receiving end thereof Download PDF

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Publication number
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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signal
circuit
interface
left channel
right channel
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Chinese (zh)
Inventor
王宗杰
吴俊义
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Aten International Co Ltd
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Aten International Co Ltd
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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

Signal extension system and transmission end thereof and receiving terminal
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.
Modulation circuit 61b and modulation circuit 61a main difference part are modulation circuit 61b except that modulator 611 and 612, comprise that more differential wave produces circuit 615.Differential wave produces circuit 615 and produces differential wave D1 and D2 according to L channel modulation signal SL5 and R channel modulation signal SR5.Further, differential wave generation circuit 615 comprises adder 613 and the moving circuit 614 of single-ended slip.Adder 613 addition L channel modulation signal SL5 and R channel modulation signal SR5 are with output single-ended signal S9.The moving circuit 614 of single-ended slip converts single-ended signal S9 into differential wave D1 and D2.
Demodulator circuit 71b and demodulator circuit 71a main difference part are that demodulator circuit except that half-wave rectifying circuit 711, low-pass filter circuit 712 and direct current are removed circuit 713, more comprises demultiplexing circuit 717.Demultiplexing circuit 717 is separated into L channel modulation signal SL5 and R channel modulation signal SR5 according to first frequency range and second frequency range with differential wave D1 and D2.Further, demultiplexing circuit 717 comprises differential commentaries on classics single-end circuit 714, L channel filter 715 and R channel filter 716.Differential commentaries on classics single-end circuit 714 converts differential wave D1 and D2 into single-ended signal S9.L channel filter 715 according to first frequency range to single-ended signal S9 filtering with output L channel modulation signal SL5, and R channel filter 716 according to second frequency range to single-ended signal S9 filtering with output R channel modulation signal SR5.The action that follow-up half-wave rectifying circuit 711, low-pass filter circuit 712 and direct current are removed circuit 713 specifies in first embodiment, does not give unnecessary details separately at this.
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)

1.一种信号延伸系统，包括：1. A signal extension system, comprising: 一传送端，包括：A transmitting end, including: 一调制电路，包括：A modulation circuit, comprising: 一第一调制器，用以根据一具有一第一频段的载波信号调制一左声道信号以产生一左声道调制信号；及a first modulator for modulating a left channel signal according to a carrier signal having a first frequency band to generate a left channel modulated signal; and 一第二调制器，用以根据一具有一第二频段的载波信号调制一右声道信号以产生一右声道调制信号；A second modulator, used to modulate a right channel signal according to a carrier signal having a second frequency band to generate a right channel modulation signal; 一第一接口，系耦接该调制电路；A first interface is coupled to the modulation circuit; 一接收端，包括：A receiving end, including: 一第二接口；以及a second interface; and 一解调电路，系耦接该第二接口，该解调电路用以分别解调该左声道调制信号及该右声道调制信号以输出该左声道信号及该右声道信号；A demodulation circuit is coupled to the second interface, and the demodulation circuit is used to respectively demodulate the left channel modulation signal and the right channel modulation signal to output the left channel signal and the right channel signal; 其中，该第一接口及该第二接口系电性连接。Wherein, the first interface and the second interface are electrically connected. 2.如权利要求1所述的信号延伸系统，其特征在于，更包括：2. The signal extension system according to claim 1, further comprising: 一网络线，包括：A network cable, including: 一对对绞线，用以电性连接该第一接口及该第二接口。A pair of twisted wires is used to electrically connect the first interface and the second interface. 3.如权利要求1所述的信号延伸系统，其特征在于，该第一频段与该第二频段不相同。3. The signal extension system of claim 1, wherein the first frequency band is different from the second frequency band. 4.如权利要求1所述的信号延伸系统，其特征在于，该解调电路包括：4. The signal extension system according to claim 1, wherein the demodulation circuit comprises: 一半波整流电路，用以分别对该左声道调制信号及右声道调制信号进行半波整流以输出一第一整流信号及一第二整流信号；A half-wave rectification circuit, used to perform half-wave rectification on the left channel modulation signal and the right channel modulation signal respectively to output a first rectification signal and a second rectification signal; 一低通滤波电路，用以分别对该第一整流信号及该第二整流信号进行低通滤波以输出一第一滤波信号及一第二滤波信号；以及a low-pass filter circuit, which is used to low-pass filter the first rectified signal and the second rectified signal respectively to output a first filtered signal and a second filtered signal; and 一直流去除电路，用以去除该第一滤波信号及该第二滤波信号的直流成分以输出该左声道信号及该右声道信号。A DC removal circuit is used to remove the DC components of the first filtered signal and the second filtered signal to output the left channel signal and the right channel signal. 5.如权利要求1所述的信号延伸系统，其特征在于，该调制电路更包括：5. The signal extension system according to claim 1, wherein the modulation circuit further comprises: 一加法器，用以相加该左声道调制信号及该右声道调制信号以输出一单端信号；以及an adder for adding the left channel modulation signal and the right channel modulation signal to output a single-ended signal; and 一单端转差动电路，用以将该单端信号转换为一差动信号。A single-end to differential circuit is used to convert the single-end signal into a differential signal. 6.如权利要求5所述的信号延伸系统，其特征在于，该解调电路更包括：6. The signal extension system according to claim 5, wherein the demodulation circuit further comprises: 一差动转单端电路，用以将该差动信号转换为该单端信号；A differential-to-single-ended circuit for converting the differential signal into the single-ended signal; 一左声道滤波器，用以根据该第一频段对该单端信号滤波以输出该左声道调制信号；以及a left channel filter, used to filter the single-ended signal according to the first frequency band to output the left channel modulation signal; and 一右声道滤波器，用以根据该第二频段对该单端信号滤波以输出该右声道调制信号。A right channel filter is used for filtering the single-ended signal according to the second frequency band to output the right channel modulation signal. 7.如权利要求6所述的信号延伸系统，其特征在于，该解调电路更包括：7. The signal extension system according to claim 6, wherein the demodulation circuit further comprises: 一半波整流电路，用以分别对该左声道调制信号及右声道调制信号进行半波整流以输出一第一整流信号及一第二整流信号；A half-wave rectification circuit, used to perform half-wave rectification on the left channel modulation signal and the right channel modulation signal respectively to output a first rectification signal and a second rectification signal; 一低通滤波电路，用以分别对该第一整流信号及该第二整流信号进行低通滤波以输出一第一滤波信号及一第二滤波信号；以及a low-pass filter circuit, which is used to low-pass filter the first rectified signal and the second rectified signal respectively to output a first filtered signal and a second filtered signal; and 一直流去除电路，用以去除该第一滤波信号及该第二滤波信号的直流成分以输出该左声道信号及该右声道信号。A DC removal circuit is used to remove the DC components of the first filtered signal and the second filtered signal to output the left channel signal and the right channel signal. 8.如权利要求5所述的信号延伸系统，其特征在于，该对对绞线用以传输该差动信号。8. The signal extension system of claim 5, wherein the pair of twisted wires is used to transmit the differential signal. 9.如权利要求1所述的信号延伸系统，其特征在于，该对对绞线用以传输该左声道调制信号及该右声道调制信号。9. The signal extension system of claim 1, wherein the pair of twisted wires is used to transmit the left channel modulation signal and the right channel modulation signal. 10.如权利要求1所述的信号延伸系统，其特征在于，该调制电路更包括：10. The signal extension system according to claim 1, wherein the modulation circuit further comprises: 一升压电路，用以将一第一直流电压提升为一第二直流电压，并将该第二直流电压输出至该第一接口。A voltage boosting circuit is used to boost a first DC voltage to a second DC voltage and output the second DC voltage to the first interface. 11.如权利要求10所述的信号延伸系统，其特征在于，该解调电路更包括：11. The signal extension system according to claim 10, wherein the demodulation circuit further comprises: 一降压电路，用以将该第二直流电压降低为一第三直流电压。A step-down circuit is used for reducing the second DC voltage to a third DC voltage. 12.一种信号延伸系统，包括：12. A signal extension system comprising: 一传送端，包括：A transmitting end, including: 一调制电路，包括：A modulation circuit, comprising: 一第一调制器，用以根据一具有一第一频段的载波信号调制一左声道信号以产生一左声道调制信号；A first modulator, used for modulating a left channel signal according to a carrier signal having a first frequency band to generate a left channel modulation signal; 一第二调制器，用以根据一具有一第二频段的载波信号调制一右声道信号以产生一右声道调制信号；及a second modulator, used to modulate a right channel signal according to a carrier signal having a second frequency band to generate a right channel modulation signal; and 一差动信号产生电路，用以根据该左声道调制信号及该右声道调制信号产生一差动信号；A differential signal generation circuit, used to generate a differential signal according to the left channel modulation signal and the right channel modulation signal; 一第一接口，用以输出该差动信号；以及a first interface for outputting the differential signal; and 一接收端，包括：A receiver, including: 一第二接口，用以接收该差动信号；a second interface for receiving the differential signal; 一解调电路，包括：A demodulation circuit, comprising: 一信号分离电路，用以根据该第一频段及该第二频段将该差动信号分离为该左声道调制信号及该右声道调制信号；a signal separation circuit for separating the differential signal into the left channel modulation signal and the right channel modulation signal according to the first frequency band and the second frequency band; 一解调模块，分别解调该左声道调制信号及该右声道调制信号以输出该左声道信号及该右声道信号。A demodulation module demodulates the left channel modulation signal and the right channel modulation signal to output the left channel signal and the right channel signal. 13.如权利要求1所述的信号延伸系统，其特征在于，更包括：一网络线，包括：13. The signal extension system according to claim 1, further comprising: a network cable, comprising: 一对对绞线，用以传输该差动信号。A pair of twisted wires is used to transmit the differential signal. 14.如权利要求12所述的信号延伸系统，其特征在于，该第一频段与该第二频段不相同。14. The signal extension system of claim 12, wherein the first frequency band is different from the second frequency band. 15.如权利要求12所述的信号延伸系统，其特征在于，该解调模块包括：15. The signal extension system according to claim 12, wherein the demodulation module comprises: 一半波整流电路，用以分别对该左声道调制信号及右声道调制信号进行半波整流以输出一第一整流信号及一第二整流信号；A half-wave rectification circuit, used to perform half-wave rectification on the left channel modulation signal and the right channel modulation signal respectively to output a first rectification signal and a second rectification signal; 一低通滤波电路，用以分别对该第一整流信号及该第二整流信号进行低通滤波以输出一第一滤波信号及一第二滤波信号；以及a low-pass filter circuit, which is used to low-pass filter the first rectified signal and the second rectified signal respectively to output a first filtered signal and a second filtered signal; and 一直流去除电路，用以去除该第一滤波信号及该第二滤波信号的直流成分以输出该左声道信号及该右声道信号。A DC removal circuit is used to remove the DC components of the first filtered signal and the second filtered signal to output the left channel signal and the right channel signal. 16.如权利要求12所述的信号延伸系统，其特征在于，该差动信号产生电路包括：16. The signal extension system according to claim 12, wherein the differential signal generating circuit comprises: 一加法器，用以相加该左声道调制信号及该右声道调制信号以输出一单端信号；以及an adder for adding the left channel modulation signal and the right channel modulation signal to output a single-ended signal; and 一单端转差动电路，用以将该单端信号转换为该差动信号。A single-end to differential circuit is used to convert the single-end signal into the differential signal. 17.如权利要求12所述的信号延伸系统，其特征在于，该信号分离电路更包括：17. The signal extension system according to claim 12, wherein the signal separation circuit further comprises: 一差动转单端电路，用以将该差动信号转换为该单端信号；A differential-to-single-ended circuit for converting the differential signal into the single-ended signal; 一左声道滤波器，用以根据该第一频段对该单端信号滤波以输出该左声道调制信号；以及a left channel filter, used to filter the single-ended signal according to the first frequency band to output the left channel modulation signal; and 一右声道滤波器，用以根据该第二频段对该单端信号滤波以输出该右声道调制信号。A right channel filter is used for filtering the single-ended signal according to the second frequency band to output the right channel modulation signal. 18.如权利要求12所述的信号延伸系统，其特征在于，该调制电路更包括：18. The signal extension system according to claim 12, wherein the modulation circuit further comprises: 一升压电路，用以将一第一直流电压提升为一第二直流电压，并将该第二直流电压输出至该第一接口。A voltage boosting circuit is used to boost a first DC voltage to a second DC voltage and output the second DC voltage to the first interface. 19.如权利要求18所述的信号延伸系统，其特征在于，该解调电路更包括：19. The signal extension system according to claim 18, wherein the demodulation circuit further comprises: 一降压电路，用以将该第二直流电压降低为一第三直流电压。A step-down circuit is used for reducing the second DC voltage to a third DC voltage. 20.一种信号延伸系统的传送端，包括：20. A transmission end of a signal extension system, comprising: 一调制电路，包括：A modulation circuit, comprising: 一第一调制器，用以根据一具有一第一频段的载波信号调制一左声道信号以产生一左声道调制信号；A first modulator, used for modulating a left channel signal according to a carrier signal having a first frequency band to generate a left channel modulation signal; 一第二调制器，用以根据一具有一第二频段的载波信号调制一右声道信号以产生一右声道调制信号；以及a second modulator for modulating a right channel signal according to a carrier signal having a second frequency band to generate a right channel modulation signal; and 一第一接口，系耦接该调制电路。A first interface is coupled to the modulation circuit. 21.如权利要求20所述的传送端，其特征在于，该第一接口经一网络线连接至一接收端。21. The transmitting end of claim 20, wherein the first interface is connected to a receiving end via a network cable. 22.如权利要求21所述的传送端，其特征在于，该接收端，包括：22. The transmitting terminal according to claim 21, wherein the receiving terminal comprises: 一第二接口，连接该网络线；以及a second interface, connected to the network cable; and 一解调电路，耦接该第二接口，该解调电路用以分别解调该左声道调制信号及该右声道调制信号以输出该左声道信号及该右声道信号；A demodulation circuit, coupled to the second interface, the demodulation circuit is used to respectively demodulate the left channel modulation signal and the right channel modulation signal to output the left channel signal and the right channel signal; 其中，该第一接口及该第二接口电性连接。Wherein, the first interface and the second interface are electrically connected. 23.一种信号延伸系统的接收端，包括：23. A receiving end of a signal extension system, comprising: 一第一接口，用以接收一差动信号或/及一电力信号；以及a first interface for receiving a differential signal or/and a power signal; and 一解调电路，包括：A demodulation circuit, comprising: 一信号分离电路，用以根据一第一频段及一第二频段将该差动信号分离为一左声道调制信号及一右声道调制信号；及a signal separation circuit for separating the differential signal into a left channel modulation signal and a right channel modulation signal according to a first frequency band and a second frequency band; and 一解调模块，分别解调该左声道调制信号及该右声道调制信号以输出一左声道信号及一右声道信号。A demodulation module demodulates the left channel modulation signal and the right channel modulation signal to output a left channel signal and a right channel signal. 24.如权利要求23所述的接收端，其特征在于，该第一接口经一网络线连接至一传送端。24. The receiving end as claimed in claim 23, wherein the first interface is connected to a transmitting end via a network cable. 25.如权利要求23所述的接收端，其特征在于，该传送端包括：25. The receiving terminal according to claim 23, wherein the transmitting terminal comprises: 一调制电路，包括：A modulation circuit, comprising: 一第一调制器，用以根据一具有该第一频段的载波信号调制该左声道信号以产生该左声道调制信号；a first modulator, configured to modulate the left channel signal according to a carrier signal having the first frequency band to generate the left channel modulated signal; 一第二调制器，用以根据一具有该第二频段的载波信号调制该右声道信号以产生该右声道调制信号；及a second modulator, used to modulate the right channel signal according to a carrier signal having the second frequency band to generate the right channel modulated signal; and 一差动信号产生电路，用以根据该左声道调制信号及该右声道调制信号产生该差动信号；A differential signal generating circuit, used to generate the differential signal according to the left channel modulation signal and the right channel modulation signal; 一第二接口，用以输出该差动信号或/及一电力信号。A second interface is used for outputting the differential signal or/and a power signal.
CN2011102170037A 2011-01-26 2011-07-21 Signal extension system and transmitting end and receiving end thereof Pending CN102625227A (en)

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