CN102857754B - Signal transmission device and transmitter and receiver thereof - Google Patents
Signal transmission device and transmitter and receiver thereof Download PDFInfo
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Abstract
A signal transmission device and a transmitter and a receiver thereof, wherein the transmitter filters a pair of digital differential signals received from an image source according to a first passing frequency band to output a pair of filtered digital differential signals, converts a single-end sound signal into a pair of differential sound signals, and filters the pair of differential sound signals according to a second passing frequency band to output a pair of filtered differential sound signals. The pair of filtered digital differential signals and the pair of filtered differential sound signals are synthesized into a pair of synthesized differential signals. The receiver receives the pair of synthetic differential signals through a pair of differential transmission lines, filters the pair of synthetic differential signals according to a first passing frequency band and a second passing frequency band respectively to restore the pair of digital differential signals and the pair of differential sound signals respectively, and then converts the pair of differential sound signals back into single-end sound signals.
Description
Technical field
The present invention is relevant with Signal transmissions, particularly about a kind of signal transmitting apparatus and conveyer thereof and receiver, without the need to extra set handling or decode element, namely by there is the filter synthetic video of different frequency and signal of video signal and can't be interfering with each other between the two.
Background technology
In recent years, multimedia video technical development obtains quite rapid.For example, high-resolution multimedia interface (the High-Definition Multimedia Interface that sound and image transmit together can be integrated, or digital video interface (Digital Visual Interface HDMI), DVI), due to its by same cable transmission without compression audio signal and there is high-resolution vision signal, do not need to carry out analog signal and convert the program that digital signal (A/D) or digital signal convert analog signal (D/A) to, therefore the target of undistorted output can be reached.
For the video-audio signal of HDMI, suppose that the cable that the signal extender of high-resolution multimedia interface adopts is CAT-5 or CAT-6 twisted-pair feeder (category 5 or category 6cable), if with the transition minimized differential signaling of 1080P (Transition Minimized Differential Signaling, TMDS) be example, vertical direction due to 1080P representative picture has 1080 horizontal scanning lines, its picture resolution is quite high 1920 × 1080, therefore frequency range required during its transmission is comparatively large, is about 1.65Gbps.Therefore, when the transition minimized differential signaling of frequency 1650MHz is by CAT-5 Double-strand transmission, only can transmit about 40 meters far away, transmission range between the audio-visual input and audio-visual output of high-resolution multimedia interface is longer, and the signal extender be arranged between audio-visual input and audio-visual output needs the design of duplicator (repeater) usually.
Because HDMI characteristics of signals also cannot transmit longer distance under the image output of high image quality, and it is quite expensive in the holding wire price that HDMI is special, therefore, how to use price wire rod inexpensively to carry out growing the HDMI Signal transmissions of distance, just become the difficult problem urgently overcome.Traditionally, because a CAT-5 or CAT-6 grid line only includes four pairs of differential transmission lines, but namely the signal of video signal of DVI or HDMI (TMDS) itself needs to be transmitted by four pairs of differential transmission lines, and digital audio signal (such as SPDIF) and/or analoging sound signal also need to be carried on these four pairs of differential transmission lines, therefore, in order to realize the target only arranging a CAT-5 grid line between the conveyer and receiver of signal extender, the extra signalization process of general most need or decode element, such as DSP, MCU, FPGA or coder/decoder etc., in order to TMDS signal of video signal, digital audio signal and/or analoging sound signal carry out the program of signal transacting, so that digital audio signal and/or analoging sound signal are loaded on TMDS signal of video signal.
But the above-mentioned practice not only easily causes between TMDS signal of video signal and voice signal interfering with each other, and need to expend more hardware cost and longer signal processing time, seriously weaken the market competitiveness of signal extender.
Summary of the invention
Therefore, the present invention proposes a kind of signal transmitting apparatus and conveyer thereof and receiver, to solve the above-mentioned variety of problems that prior art suffers from.
A category of the present invention is to propose a kind of signal transmitting apparatus.In a specific embodiment, signal transmitting apparatus comprises conveyer, pair of differential transmission line and receiver.Conveyer includes single-ended/differential wave modular converter and has different the first filtration module by frequency range and the second filtration module.The input of the second filtration module couples single-ended/differential wave modular converter and the output of the second filtration module couples the output of the first filtration module.First filtration module carries out filtering to export a pair filtering figure differential wave by frequency range to a pair digital differential signal receiving self imaging source according to first.Single-ended voice signal is converted to pair of differential voice signal by single-ended/differential wave modular converter, then carries out filtering to export a pair filtering differential voice signal to this to differential voice signal by frequency range according to second by the second filtration module.This synthesizes a pair synthesis differential wave to filtering figure differential wave and this to the differential voice signal of filtering.This couples conveyer to differential transmission line, in order to transmit this to synthesis differential wave.
Receiver receives this to synthesis differential wave from this to differential transmission line, and receiver comprises the 3rd filtration module, the 4th filtration module and differential/single-ended signal modular converter.The input of the 3rd filtration module couples the input of the 4th filtration module, and differential/single-ended signal modular converter couples the output of the 4th filtration module.3rd filtration module carries out filtering to export this to digital differential wave to this to synthesis differential wave by frequency range according to first.4th filtration module carries out filtering to export this to differential voice signal to this to synthesis differential wave by frequency range according to second, and by differential/single-ended signal modular converter, this is converted to single-ended voice signal to differential voice signal.
In another specific embodiment, signal transmitting apparatus comprises conveyer, multipair differential transmission line and receiver.Conveyer comprises the first filtration module, single-ended/differential wave modular converter and the second filtration module.First filtration module comprises multiple high pass filter unit, in order to carry out high-pass filtering to export multipair high-pass filtering digital differential signal to the multipair digital differential signal receiving self imaging source respectively.Single-ended/differential wave modular converter is in order to be converted at least one pair of differential voice signal by least one single-ended voice signal.Second filtration module comprises at least one low-pass filter unit, and its input couples single-ended/differential wave modular converter and its output couples the output of the first filtration module.To this, at least one pair of differential voice signal carries out low-pass filtering to export the differential voice signal of at least one pair of low-pass filtering to this at least one low-pass filter unit, the differential voice signal of this at least one pair of low-pass filtering is caused to be blended at least one pair of high-pass filtering digital differential signal of this multipair high-pass filtering digital differential signal, to form multipair synthesis differential wave.Multipair differential transmission line couples conveyer, in order to transmit this multipair synthesis differential wave.
Receiver comprises the 3rd filtration module, the 4th filtration module and differential/single-ended signal modular converter.3rd filtration module comprises the plurality of high pass filter unit, in order to carry out high-pass filtering to restore this multipair digital differential signal to this multipair synthesis differential wave respectively, and exports image display to.4th filtration module comprises this at least one low-pass filter unit, and its input couples the input of the 3rd filtration module.This at least one low-pass filter unit carries out low-pass filtering to restore this at least one pair of differential voice signal to this multipair synthesis differential wave.Differential/single-ended signal modular converter couples the output of the 4th filtration module, in order to by this, at least one pair of differential voice signal is converted to this at least one single-ended voice signal.
Another category of the present invention is to propose a kind of conveyer.In a specific embodiment, transmitter applications is in signal transmitting apparatus.Conveyer includes single-ended/differential wave modular converter and has different the first filtration module by frequency range and the second filtration module.The input of the second filtration module couples single-ended/differential wave modular converter and the output of the second filtration module couples the output of the first filtration module.First filtration module carries out filtering to export a pair filtering figure differential wave by frequency range to a pair digital differential signal receiving self imaging source according to first.Single-ended voice signal is converted to pair of differential voice signal by single-ended/differential wave modular converter, then carries out filtering to export a pair filtering differential voice signal to this to differential voice signal by frequency range according to second by the second filtration module.This synthesizes a pair synthesis differential wave to filtering figure differential wave and this to the differential voice signal of filtering.
In another specific embodiment, conveyer comprises the first filtration module, single-ended/differential wave modular converter and the second filtration module.First filtration module comprises multiple high pass filter unit, in order to carry out high-pass filtering to export multipair high-pass filtering digital differential signal to the multipair digital differential signal receiving self imaging source respectively.Single-ended/differential wave modular converter is in order to be converted at least one pair of differential voice signal by least one single-ended voice signal.Second filtration module comprises at least one low-pass filter unit, and its input couples single-ended/differential wave modular converter and its output couples the output of the first filtration module.To this, at least one pair of differential voice signal carries out low-pass filtering to export the differential voice signal of at least one pair of low-pass filtering to this at least one low-pass filter unit, the differential voice signal of this at least one pair of low-pass filtering is caused to be blended at least one pair of high-pass filtering digital differential signal of this multipair high-pass filtering digital differential signal, to form multipair synthesis differential wave.
Another category of the present invention is to propose a kind of receiver.In a specific embodiment, receiver is applied to signal transmitting apparatus.Receiver is in order to receive a pair synthesis differential wave, and this is synthesized by a pair digital differential signal and pair of differential voice signal synthesis differential wave.Receiver comprises the first filtration module, the second filtration module and differential/single-ended signal modular converter.The input of the first filtration module couples the input of the second filtration module, and differential/single-ended signal modular converter couples the output of the second filtration module.First filtration module carries out filtering to export this to digital differential wave to this to synthesis differential wave by frequency range according to first.Second filtration module carries out filtering to export this to differential voice signal to this to synthesis differential wave by frequency range according to second, and by differential/single-ended signal modular converter, this is converted to single-ended voice signal to differential voice signal.
In another specific embodiment, receiver comprises the first filtration module, the second filtration module and differential/single-ended signal modular converter.First filtration module comprises multiple high pass filter unit, in order to carry out high-pass filtering to restore this multipair digital differential signal to this multipair synthesis differential wave respectively, and exports image display to.Second filtration module comprises at least one low-pass filter unit, and its input couples the input of the first filtration module.At least one low-pass filter unit carries out low-pass filtering to restore this at least one pair of differential voice signal to this multipair synthesis differential wave.Differential/single-ended signal modular converter couples the output of the second filtration module, in order to by this, at least one pair of differential voice signal is converted at least one single-ended voice signal.
Can be further understood by the following detailed description and accompanying drawings about the advantages and spirit of the present invention.
Accompanying drawing explanation
Fig. 1 illustrates the schematic diagram of the signal transmitting apparatus according to one embodiment of the invention.
Fig. 2 illustrates the schematic diagram of the signal transmitting apparatus of another embodiment of the present invention.
Fig. 3 A and 3B is the schematic diagram of synthesis differential wave.
Fig. 4 is the schematic diagram of the conveyer of signal transmitting apparatus of the present invention.
[main element symbol description]
1: the first electronic installation 2, STA: signal transmitting apparatus
3: second electronic device 20,4,4a: conveyer
21: transmission line 22,6: receiver
201,42: the first filtration module 202,43: the second filtration modules
221,62: the three filtration module 222,63: the four filtration modules
DD ±: a pair digital differential signal FDD ±: a pair filtering figure differential wave
SA: single-ended voice signal DA ±: pair of differential voice signal
SD ±: a pair synthesis differential wave FDA ±: the differential voice signal of a pair filtering
203,41: single-ended/differential wave modular converter
223: differential/single-ended signal modular converter
70: digitized video source 71: digital tone source
72: simulation source of sound 80: digitized video output device
81: digital audio output device 82: simulated sound output device
L1 ~ L4: the first pair of differential transmission line ~ four pair differential transmission line
40: buffer 44: differential wave conveyer
L: inductance element G: earth terminal
421 ~ 424,621 ~ 624: high pass filter unit
431 ~ 433,631 ~ 633: low-pass filter unit
DC ±: a pair digital clock pulse differential wave
FDC ±: a pair high-pass filtering numeral clock pulse differential wave
DD1 ±, DD2 ±, DD3 ±: three differential waves to digital data
FDD1 ±, FDD2 ±, FDD3 ±: three pairs of high-pass filtering numerical data differential waves
SDA: single ended digital voice signal DDA ±: pair of differential digital audio signal
FDDA ±: a pair low-pass filtering differential digital voice signal
SAA1, SAA2: single-ended analog voice signal
DAA1 ±, DAA2 ±: two pairs of differential analog voice signals
FDAA1 ±, FDAA2 ±: two pairs of low-pass filtering differential analog voice signals
SD1 ± ~ SD4 ±: first to synthesizing differential wave ~ four to synthesis differential wave
5: grid line 48: switch
60: compensator 61: differential/single-ended signal modular converter
64: differential signal receiver
S
tMDS (data): TMDS data-signal DD2 ±/DD3 ±
S
audio: differential analog voice signal DAA1 ±/DAA2 ±
S
mix: the high-pass filtering numerical data differential wave FDD2 ±/FDD3 of mixing ±
S
tMDS (CLK): TMDS clock signal DC ±
S
sPDIF: SPDIF signal
S
mix (FDC): the high-pass filtering numeral clock pulse differential wave FDC of mixing ±
Embodiment
A preferred embodiment according to the present invention is a kind of signal transmitting apparatus.In fact, signal transmitting apparatus can be video-audio signal stretcher or audio-visual switch, and be applied to and can integrate the high-resolution multimedia interface or transmission keyboard-mouse-display switch (KVM switch) that sound and image transmit together, but not as limit.Due to high-resolution multimedia interface by the transmission of consolidated network line without compression audio signal and there is high-resolution vision signal, do not need to carry out analog signal and convert the program that digital signal (A/D) or digital signal convert analog signal (D/A) to, therefore the target of undistorted output can be reached.
Please refer to Fig. 1, Fig. 1 illustrates the schematic diagram of the signal transmitting apparatus in this embodiment.As shown in Figure 1, signal transmitting apparatus 2 is coupled between the first electronic installation 1 and second electronic device 3.Wherein, the first electronic installation 1 for having the video and audio output device of high-resolution multimedia interface, such as blue-ray DVD player or there is the computer or server etc. that digitized video HDMI or DVI export, but not as limit; Second electronic device 3 for including the audio-visual display unit of high-resolution multimedia interface, such as, has the Digital Television of high image quality, family's theater audio-visual equipment or projection display equipment, but also not as limit.
In addition, digital image signal received by signal transmitting apparatus 2 and voice signal can from same first electronic installations 1, or from the first different electronic installations 1, that is image source can be same first electronic installation 1 or the first different electronic installations 1 from sound source, there is no specific restriction.In like manner, digital image signal and voice signal also can be exported to same second electronic device 3 or different second electronic devices 3 by signal transmitting apparatus 2.
In the embodiment of Fig. 1, signal transmitting apparatus 2 comprises conveyer 20, transmission line 21 and receiver 22.Wherein, conveyer 20 couples the first electronic installation 1; Receiver 22 couples second electronic device 3; Transmission line 21 is coupled between conveyer 20 and receiver 22.In this embodiment, transmission line 21 has at least one pair of above twisted-pair feeder, can also be made up of CAT-5 or CAT-6 twisted-pair feeder (category 5or category 6cable), such as: Cat-5e, Cat-6, Cat-6e etc., it has four pairs of differential transmission lines, but not as limit.In fact, between conveyer 20 and the first electronic installation 1 and carry out the transmission of signal between receiver 22 and second electronic device 3 by high-definition multimedia interface (HDMI), digital video interface (DVI) or digital-to-analog message interface, there is no specific restriction.The present embodiment is described from same first electronic installation 1 for digital image signal and voice signal.
As shown in Figure 1, conveyer 20 at least includes and has different the first filtration module 201 by frequency range and the second filtration module 202 and single-ended/differential wave modular converter 203.The input of the second filtration module 202 couples single-ended/differential wave modular converter 203 and the output of the second filtration module 202 couples the output of the first filtration module 201.In this embodiment, the first filtration module 201 according to first by frequency range to be received from a pair digital differential signal DD of the first electronic installation 1 ± carry out filtering with export a pair filtering figure differential wave FDD ±.Single-ended/differential wave modular converter 203 single-ended voice signal SA is converted to pair of differential voice signal DA ±, then by the second filtration module 202 according to second by frequency range to this to differential voice signal DA ± carry out filtering with export the differential voice signal FDA of a pair filtering ±.This to filtering figure differential wave FDD ± with this to the differential voice signal FDA of filtering ± synthesize a pair synthesis differential wave SD ±, and by the pair of differential transmission line in transmission line 21 by this to synthesis differential wave SD ± transfer to receiver 22.
As shown in Figure 3A, this figure is synthesis differential wave schematic diagram.In figure 3 a, only illustrate with just differential, this is to filtering differential voice signal FDA ± be the differential voice signal of a simulation, and this to filtering figure differential wave FDD ± carry in this to the differential voice signal FDA of filtering ± on; Coordinate the signal S in Fig. 2, Fig. 3 A
tMDS (data)for the second high-pass filtering data unit 423/ the 3rd high-pass filtering data unit 424 in Fig. 2 TMDS data-signal DD2 ±/DD3 ±, and signal S
audiofor through the first simulated sound low-pass filter unit 432/ second simulated sound low-pass filter unit 433 differential analog voice signal DAA1 ±/DAA2 ±, and signal S
mixthen for mixing high-pass filtering numerical data differential wave FDD2 ±/FDD3 ±.As shown in Figure 3 B, illustrate with just differential, this is to the differential voice signal FDA of filtering ± be a digital differential voice signal, and this to filtering figure differential wave FDD ± carry in this to the differential voice signal FDA of filtering ± on; Coordinate the signal S in Fig. 2, Fig. 3 B
tMDS (CLK)for through clock pulse high pass filter unit 421 TMDS clock signal DC ±, signal S
sPDIFfor the SPDIF signal through digital audio low-pass filter unit 431, and signal S
mix (FDC)the digital clock pulse differential wave FDC of high-pass filtering for mixing ±.In fact, single-ended/differential wave modular converter 203 can include operational amplifier (Operational Amplifier), in order to single-ended voice signal SA is converted to pair of differential voice signal DA ±, to increase distance that signal transmits and the interference of noise can be avoided.
Receiver 22 at least includes the 3rd filtration module 221, the 4th filtration module 222 and differential/single-ended signal modular converter 223.The input of the 3rd filtration module 221 couples the input of the 4th filtration module 222, and differential/single-ended signal modular converter 223 couples the output of the 4th filtration module 222.When this in receiver 22 automatic network line 21 differential transmission line received this to synthesis differential wave SD ± after, the 3rd filtration module 221 according to first by frequency range to this to synthesis differential wave SD ± carry out filtering to export this to digital differential wave DD ± to second electronic device 3.4th filtration module 222 according to second by frequency range to this to synthesis differential wave SD ± carry out filtering with export this to differential voice signal DA ±, and by differential/single-ended signal modular converter 223 by this to differential voice signal DA ± be converted to single-ended voice signal SA, and export second electronic device 3 to.In fact, differential/single-ended signal modular converter 223 can include operational amplifier (Operational Amplifier).It is noted that in one embodiment, if single-ended voice signal SA is analog stereo signal, the amplitude of the single-ended voice signal SA after its reduction can be identical with the amplitude size of the single-ended voice signal SA originally inputing to conveyer 20; If single-ended voice signal SA is the SPDIF signal of numeral, then its amplitude size need meet the receptible amplitude specification of optical fiber (Toslink) coffret.
It should be noted that, the first filtration module 201 and the 3rd filtration module 221 of receiver 22 of conveyer 20 all adopt first by frequency range respectively to this to digital differential wave DD ± and this is to synthesizing differential wave SD ± carry out high-pass filtering.In practical application, if this is to digital differential wave DD ± be a pair digital clock pulse differential wave (such as TMDS clock signal), because the frequency range of general digital clock pulse differential wave is about between 20MHz to 225MHz, therefore, of the present invention first is set as the frequency range of more than 11MHz by frequency range, makes this can by this high-pass filtering program institute filtering to the noise outside digital clock pulse differential wave; If this is to digital differential wave DD ± be differential wave (such as TMDS data-signal) to digital data, because the frequency range of general numerical data differential wave is about between 10MHz to 1.125GHz, therefore, of the present invention first is set as the frequency range of more than 1.5MHz by frequency range, makes this noise to digital data outside differential wave can by this high-pass filtering program institute filtering.
The second filtration module 202 and the 4th filtration module 222 of receiver 22 as conveyer 20 all adopt second by frequency range respectively to this to differential voice signal DA ± and this is to synthesizing differential wave SD ± carry out low-pass filtering.In practical application, if this is to differential voice signal DA ± be a pair digital audio differential wave (such as SPDIF signal), because the frequency range of general digital audio differential wave is about less than 8MHz, therefore, of the present invention second is set as the frequency range of more than 9MHz by frequency range, makes this can by this low-pass filtering program institute filtering to the noise outside digital audio differential wave; If this is to differential voice signal DA ± be a pair simulated sound differential wave (such as stereophonic signal, monophony or left and right dual track), the frequency range of the simulated sound differential wave can heard due to common people's ear is about less than 22KHz, therefore, of the present invention second is set as the frequency range of more than 530KHz by frequency range, makes this can by this low-pass filtering program institute filtering to the noise outside simulated sound differential wave.
Then, please refer to Fig. 2, Fig. 2 illustrates the schematic diagram of another embodiment of signal transmitting apparatus of the present invention.As shown in Figure 2, signal transmitting apparatus STA comprises conveyer 4, grid line 5 and receiver 6.Wherein, conveyer 4 couples digitized video source 70, digital tone source 71 and simulation source of sound 72; Receiver 6 couples digitized video output device 80, digital audio output device 81 and simulated sound output device 82.Grid line 5 comprises four couples of differential transmission line L1 ~ L4, is coupled between conveyer 4 and receiver 6.Digitized video source 70 for having the video and audio output device of high-resolution multimedia interface, such as blue-ray DVD player or there is the computer or server etc. that digitized video HDMI or DVI export, but not as limit; Digital tone source 71 transmits SPDIF (Sony Philips Digital Interconnect Format) signal to conveyer 4 by optical fiber (Toslink); Simulation source of sound 72 is stereo generator, and in order to produce the dual track message with analog format, L channel stereophonic signal and right channel stereo signals are to conveyer 4.Digitized video output device 80 for having the audio-visual display unit of high-resolution multimedia interface, such as, has Digital Television or the projection display equipment of high image quality, but also not as limit.Although be noted that in the present embodiment, simulation source of sound 72 with digital tone source 71 for exist simultaneously, actually, not with the embodiment shown in Fig. 2 for limiting.Such as, digital tone source 71 also only can be had to exist, or only have simulation source of sound 72 to exist.
First, be first described in detail with regard to conveyer 4.Conveyer 4 includes buffer (buffer) 40, single-ended/differential wave modular converter 41, first filtration module 42, second filtration module 43, differential wave conveyer 44 and inductance component L.Wherein, inductance component L also can adopt magnetic bead (bead) element to replace it, and differential wave conveyer 44 can be RJ-45 signal transmitter, and the present embodiment is the connector of RJ-45.First filtration module 42 includes four high pass (high-pass) filter units 421 ~ 424 and the second filtration module comprises three low pass (low-pass) filter units 431 ~ 433.These four high pass filter unit 421 ~ 424 are clock pulse high pass filter unit 421, first high-pass filtering data unit 422, second high-pass filtering data unit 423 and the 3rd high-pass filtering data unit 424 respectively.These three low-pass filter units 431 ~ 433 are digital audio low-pass filter unit 431, first simulated sound low-pass filter unit 432 and the second simulated sound low-pass filter unit 433 respectively.
As shown in Figure 2, the input of clock pulse high pass filter unit 421, first high-pass filtering data unit 422, second high-pass filtering data unit 423 and the 3rd high-pass filtering data unit 424 all couples buffer 40; The input of digital audio low-pass filter unit 431, first simulated sound low-pass filter unit 432 and the second simulated sound low-pass filter unit 433 all couples single-ended/differential wave modular converter 41; The output of clock pulse high pass filter unit 421, first high-pass filtering data unit 422, second high-pass filtering data unit 423 and the 3rd high-pass filtering data unit 424 all couples differential wave conveyer 44; The output of digital audio low-pass filter unit 431 is coupled between the output of clock pulse high pass filter unit 421 and differential wave conveyer 44; Between the output that the output of the first simulated sound low-pass filter unit 432 is coupled to the second high-pass filtering data unit 423 and differential wave conveyer 44; Between the output that the output of the second simulated sound low-pass filter unit 433 is coupled to the 3rd high-pass filtering data unit 424 and differential wave conveyer 44; One end of inductance element (or magnetic bead element) L is coupled to earth terminal G, between the output that the other end is coupled to the first high-pass filtering data unit 422 and differential wave conveyer 44.Be noted that hold the object of G to be in order to conveyer can mutually be mated with the voltage quasi position of receiver with being coupled to, cause wherein one end to damage to avoid the abnormal voltage difference between conveyer and receiver; And the mode of ground connection not with inductance or magnetic bead element for restriction.
It should be noted that, between the output that the output of the first simulated sound low-pass filter unit 432 not must be coupled to the second high-pass filtering data unit 423 and differential wave conveyer 44, between the output that the output of the second simulated sound low-pass filter unit 433 also not necessarily have to be coupled to the 3rd high-pass filtering data unit 424 and differential wave conveyer 44.In fact, between the output of the first simulated sound low-pass filter unit 432 and the second simulated sound low-pass filter unit 433 output that can be coupled to the first high-pass filtering data unit 422 and differential wave conveyer 44, between the output of the second high-pass filtering data unit 423 and differential wave conveyer 44 and between the output of the 3rd high-pass filtering data unit 424 and differential wave conveyer 44, appoint both.Then earth terminal G is coupled to by inductance element (or magnetic bead element) L as the another one in three.The present embodiment holds G with being coupled to the output of the first high-pass filtering data unit 422.
When buffer 40 to receive from digitized video source 70 four to digital differential wave (comprise a pair digital clock pulse differential wave DC ± and three differential wave DD1 to digital data ±, DD2 ± with DD3 ±) time, buffer 40 will strengthen the digital differential wave DC of this four couple ±, DD1 ±, DD2 ± and DD3 ± intensity, to increase its transmission range.Then, buffer 40 by the digital differential wave DC of this four couple after strengthening ±, DD1 ±, clock pulse high pass filter unit 421, first high-pass filtering data unit 422, second high-pass filtering data unit 423 and the 3rd high-pass filtering data unit 424 of DD2 ± and DD3 ± export to respectively the first filtration module 42.Be noted that buffer 40 of the present invention and non-essential element, it can determine whether will use depending on transmission range, if transmission range length can use buffer 40, if transmission range in short-term, might not use.
Clock pulse high pass filter unit 421 according to clock pulse by frequency range to this to digital clock pulse differential wave DC ± carry out high-pass filtering, with export a pair high-pass filtering numeral clock pulse differential wave FDC ±; First high-pass filtering data unit 422, second high-pass filtering data unit 423 and the 3rd high-pass filtering data unit 424 respectively data-driven by frequency range to this three to digital data differential wave DD1 ±, DD2 ± with DD3 ± carry out high-pass filtering, with export respectively three couples of high-pass filtering numerical data differential wave FDD1 ±, FDD2 ± with FDD3 ±.In fact, because the frequency range of general digital clock pulse differential wave (such as TMDS clock signal) is about between 20MHz to 225MHz, therefore, clock pulse of the present invention is set as the frequency range of more than 11MHz by frequency range, make this to digital clock pulse differential wave DC ± outside noise can by this high-pass filtering program institute filtering.In addition, because the frequency range of general numerical data differential wave (such as TMDS data-signal) is about between 10MHz to 1.125GHz, therefore, data of the present invention are set as the frequency range of more than 1.5MHz by frequency range, make this noise to digital data outside differential wave can by this high-pass filtering program institute filtering.
On the other hand, when single-ended/differential wave modular converter 41 receives single ended digital voice signal SDA and two single-ended analog voice signal SAA1 from digital tone source 71 and simulation source of sound 72 respectively, during SAA2, single-ended/differential wave modular converter 41 will respectively single ended digital voice signal SDA and two single-ended analog voice signal SAA1, SAA2 be converted to pair of differential digital audio signal DDA ± and two couple of differential analog voice signal DAA1 ±, DAA2 ±, and by this to differential digital voice signal DDA ± export digital audio low-pass filter unit 431 to, and by these two couples of differential analog voice signal DAA1 ±, DAA2 ± export the first simulated sound low-pass filter unit 432 and the second simulated sound low-pass filter unit 433 to.
When digital audio low-pass filter unit 431 receive this to differential digital voice signal DDA ± time, digital audio low-pass filter unit 431 according to digital audio by frequency range to this to differential digital voice signal DDA ± carry out low-pass filtering, to export a pair low-pass filtering differential digital voice signal FDDA ± between clock pulse high pass filter unit 421 and differential wave conveyer 44, make this to low-pass filtering differential digital voice signal FDDA ± can export with clock pulse high pass filter unit 421 this to high-pass filtering numeral clock pulse differential wave FDC ± synthesize first to synthesize differential wave SD1 ±, and the first couple of differential transmission line L1 exported to by differential wave conveyer 44 in grid line 5.
When the first simulated sound low-pass filter unit 432 receive the first pair of differential analog voice signal DAA1 ± time, first simulated sound low-pass filter unit 432 according to simulated sound by frequency range to first couple of differential analog voice signal DAA1 ± carry out low-pass filtering, to export first couple of low-pass filtering differential analog voice signal FDAA1 ± between the second high-pass filtering data unit 423 and differential wave conveyer 44, make second couple of high-pass filtering numerical data differential wave FDD2 of first couple of low-pass filtering differential analog voice signal FDAA1 ± can export with the second high-pass filtering data unit 423 ± synthesize the 3rd to synthesize differential wave SD3 ±, and the 3rd couple of differential transmission line L3 exported to by differential wave conveyer 44 in grid line 5.
In like manner, when the second simulated sound low-pass filter unit 433 receive the second pair of differential analog voice signal DAA2 ± time, second simulated sound low-pass filter unit 433 according to simulated sound by frequency range to second couple of differential analog voice signal DAA2 ± carry out low-pass filtering, to export second couple of low-pass filtering differential analog voice signal FDAA2 ± between the 3rd high-pass filtering data unit 424 and differential wave conveyer 44, make the 3rd couple of high-pass filtering numerical data differential wave FDD3 of second couple of low-pass filtering differential analog voice signal FDAA2 ± can export with the 3rd high-pass filtering data unit 424 ± synthesize the 4th to synthesize differential wave SD4 ±, and the 4th couple of differential transmission line L4 exported to by differential wave conveyer 44 in grid line 5.The first couple of high-pass filtering numerical data differential wave FDD1 exported as the first high-pass filtering data unit 422 ± by differential wave conveyer 44 exports second couple of differential transmission line L2 in grid line 5 to, this to high-pass filtering numerical data differential wave with SD2 ± represent.
In fact, because the frequency range of general digital audio differential wave (such as SPDIF signal) is about less than 8MHz, therefore, digital audio of the present invention is set as the frequency range of more than 9MHz by frequency range, make this to digital audio differential wave DDA ± outside noise can by this low-pass filtering program institute filtering.In addition, the frequency range of the simulated sound differential wave (such as stereophonic signal) can heard due to common people's ear is about less than 22KHz, therefore, simulated sound of the present invention is set as the frequency range of more than 530KHz by frequency range, make this two couples of simulated sound differential wave DAA1 ± and DAA2 ± outside noise can by this low-pass filtering program institute filtering.Combined by the screening of high pass and low pass band, when signal of video signal and voice signal can be allowed to combine, mutually can not disturb and image and voice signal can be transmitted on twisted-pair feeder same simultaneously.In addition, as the configuration of Fig. 2 embodiment, can enable voice (simulation, numeral or simulation and several combinatorics on words) and image (as DVI or HDMI) transmit on single bar Cat 5. transmission line.
Next, will be described in detail with regard to receiver 6.As shown in Figure 2, receiver 6 includes compensator 60, differential/single-ended signal modular converter 61, the 3rd filtration module 62, the 4th filtration module 63, differential signal receiver 64 and inductance component L.Wherein, inductance component L also can adopt magnetic bead element to replace it, and differential signal receiver 64 can be RJ-45 signal receiver.It should be noted that the 3rd filtration module 62 includes four high pass filter unit 621 ~ 624 and the 4th filtration module comprises three low-pass filter units 631 ~ 633.These four high pass filter unit 621 ~ 624 are clock pulse high pass filter unit 621, first high-pass filtering data unit 622, second high-pass filtering data unit 623 and the 3rd high-pass filtering data unit 624 respectively.These three low-pass filter units 631 ~ 633 are digital audio low-pass filter unit 631, first simulated sound low-pass filter unit 632 and the second simulated sound low-pass filter unit 633 respectively.
As shown in Figure 2, the output of clock pulse high pass filter unit 621, first high-pass filtering data unit 622, second high-pass filtering data unit 623 and the 3rd high-pass filtering data unit 624 all couples compensator 60; The output of digital audio low-pass filter unit 631, first simulated sound low-pass filter unit 632 and the second simulated sound low-pass filter unit 633 all couples differential/single-ended signal modular converter 61; The input of clock pulse high pass filter unit 621, first high-pass filtering data unit 622, second high-pass filtering data unit 623 and the 3rd high-pass filtering data unit 624 all couples differential signal receiver 64; The input of the input of digital audio low-pass filter unit 631, the input of the first simulated sound low-pass filter unit 632 and the second simulated sound low-pass filter unit 633 is also coupled on three pairs of twisted-pair feeders that differential signal receiver 64 has.
Both are appointed between the input that the input of the first simulated sound low-pass filter unit 632 and the second simulated sound low-pass filter unit 633 can be coupled to the first high-pass filtering data unit 622 and differential signal receiver 64, between the input of the second high-pass filtering data unit 623 and differential signal receiver 64 and between the input of the 3rd high-pass filtering data unit 624 and differential signal receiver 64.In the present embodiment, digital audio low-pass filter unit 631 is coupled between the input of clock pulse high pass filter unit 621 and differential signal receiver 64; Between the input that the input of the first simulated sound low-pass filter unit 632 is coupled to the second high-pass filtering data unit 623 and differential signal receiver 64; And second the input of simulated sound low-pass filter unit 633 be also coupled between the input of the 3rd high-pass filtering data unit 624 and differential signal receiver 64 and synthesize differential wave to receive.Then earth terminal G is coupled to by inductance component L as the another one in three.In the present embodiment, one end of inductance element (or magnetic bead element) L is utilized to be coupled to earth terminal G, between the input that the other end is coupled to the first high-pass filtering data unit 622 and differential signal receiver 64; The mode coupling ground connection is not limited with inductance element and magnetic bead element.In the present embodiment, what the relation that couples of the input of above-mentioned first simulated sound low-pass filter unit 632 and the second simulated sound low-pass filter unit 633 corresponded to the input of the first simulated sound low-pass filter unit 432 and the second simulated sound low-pass filter unit 433 couples relation, but not as limit.
First couple of differential transmission line L1 in differential signal receiver 64 respectively automatic network line 5, second couple of differential transmission line L2, 3rd couple of differential transmission line L3 and the 4th couple differential transmission line L4 receive first to synthesis differential wave SD1 ±, high-pass filtering numerical data differential wave SD2 ±, 3rd to synthesis differential wave SD3 ± and the 4th to synthesis differential wave SD4 ± time, differential signal receiver 64 respectively by first to synthesis differential wave SD1 ±, high-pass filtering numerical data differential wave SD2 ±, 3rd to synthesis differential wave SD3 ± and the 4th to synthesis differential wave SD4 ± be sent to clock pulse high pass filter unit 621, first high-pass filtering data unit 622, second high-pass filtering data unit 623 and the 3rd high-pass filtering data unit 624.
Clock pulse high pass filter unit 621 according to clock pulse by frequency range to first to synthesis differential wave SD1 ± carry out high-pass filtering, to export this to digital clock pulse differential wave DC ± to compensator 60; First high-pass filtering data unit 622, second high-pass filtering data unit 623 and the 3rd high-pass filtering data unit 624 respectively data-driven by frequency range to high-pass filtering numerical data differential wave SD2 ±, the 3rd to synthesis differential wave SD3 ± and the 4th to synthesis differential wave SD4 ± carry out high-pass filtering, with export respectively this three to digital data differential wave DD1 ±, DD2 ± with DD3 ± to compensator 60.In fact, because the frequency range of general digital clock pulse differential wave (such as TMDS clock signal) is about between 20MHz to 225MHz, therefore, clock pulse of the present invention is set as the frequency range of more than 11MHz by frequency range, make first to synthesis differential wave SD1 ± by only remain after this high-pass filtering program this to digital clock pulse differential wave DC ±.In addition, because the frequency range of general numerical data differential wave (such as TMDS data-signal) is about between 10MHz to 1.125GHz, therefore, data of the present invention are set as the frequency range of more than 1.5MHz by frequency range, make high-pass filtering numerical data differential wave SD2 ±, the 3rd to synthesis differential wave SD3 ± and the 4th to synthesis differential wave SD4 ± by only remain respectively after high-pass filtering program this three to digital data differential wave DD1 ±, DD2 ± with DD3 ±.
Input due to digital audio low-pass filter unit 631 is coupled between the input of clock pulse high pass filter unit 621 and differential signal receiver 64, therefore, digital audio low-pass filter unit 631 will receive first to synthesis differential wave SD1 ± and according to digital audio by frequency range to first to synthesis differential wave SD1 ± carry out low-pass filtering, to export this to differential digital voice signal DDA ± to differential/single-ended signal modular converter 61.Between the input being coupled to the second high-pass filtering data unit 623 due to the input of the first simulated sound low-pass filter unit 632 and differential signal receiver 64, therefore, first simulated sound low-pass filter unit 632 will receive the 3rd to synthesis differential wave SD3 ± and according to simulated sound by frequency range to the 3rd to synthesis differential wave SD3 ± carry out low-pass filtering, to export first couple of differential analog voice signal DAA1 ± to differential/single-ended signal modular converter 61.In like manner, between the input being coupled to the 3rd high-pass filtering data unit 624 due to the input of the second simulated sound low-pass filter unit 633 and differential signal receiver 64, therefore, second simulated sound low-pass filter unit 633 will receive the 4th to synthesis differential wave SD4 ± and according to simulated sound by frequency range to the 4th to synthesis differential wave SD4 ± carry out low-pass filtering, to export second couple of differential analog voice signal DAA2 ± to differential/single-ended signal modular converter 61.
In fact, because the frequency range of general digital audio differential wave (such as SPDIF signal) is about less than 8MHz, therefore, digital audio of the present invention is set as the frequency range of more than 9MHz by frequency range, make first to synthesis differential wave SD1 ± by only remain after this low-pass filtering program this to digital audio differential wave DDA ±.In addition, the frequency range of the simulated sound differential wave (such as stereophonic signal) can heard due to common people's ear is about less than 22KHz, therefore, simulated sound of the present invention is set as the frequency range of more than 530KHz by frequency range, make the 3rd to synthesis differential wave SD3 ± and the 4th to synthesis differential wave SD4 ± by only remain after low-pass filtering program this two couples of simulated sound differential wave DAA1 ± and DAA2 ±.
When compensator 60 receive this to digital clock pulse differential wave DC ± and this three to digital data differential wave DD1 ±, DD2 ± with DD3 ± time, due to this to digital clock pulse differential wave DC ± and this three to digital data differential wave DD1 ±, DD2 ± with DD3 ± after the transmission of long-distance, the decay of easy generation signal strength signal intensity, therefore, compensator 60 will compensate this to digital clock pulse differential wave DC ± and this three to digital data differential wave DD1 ±, DD2 ± with DD3 ± intensity, and by compensate after this to digital clock pulse differential wave DC ± and this three to digital data differential wave DD1 ±, DD2 ± with DD3 ± export digitized video output device 80 to.
When differential/single-ended signal modular converter 61 receive this to differential digital voice signal DDA ±, first pair of differential analog voice signal DAA1 ± and the second pair of differential analog voice signal DAA2 ± time, differential/single-ended signal modular converter 61 will respectively by this to differential digital voice signal DDA ±, first couple of differential analog voice signal DAA1 ± and the second couple of differential analog voice signal DAA2 ± be converted to this to single ended digital voice signal SDA, first couple of single-ended analog voice signal SAA1 and second couple of single-ended analog voice signal SAA2, and single ended digital voice signal SDA is exported this to digital audio output device 81, and export first couple of single-ended analog voice signal SAA1 and second couple of single-ended analog voice signal SAA2 to simulated sound output device 82.
Please refer to Fig. 4, Fig. 4 illustrates the schematic diagram of the conveyer of signal transmitting apparatus of the present invention.In the present embodiment, can be coupled by a switch 48 and organize AV signal source more.In fact, the visual actual demand of switch 48 is integrated in conveyer 4 or is arranged at outside conveyer 4 and couples with conveyer 4, there is no specific restriction.Such as: in the diagram, there are two groups of audio-visual sources 70,71,72, be coupled to switch 48 respectively with 70a, 71a, 72a.Different audio-visual sources 70,71,72 can be selected by the control of switch 48, or 70a, 71a, 72a.After selection, audio-visual source 70,71,72, or the processing mode of the image that provides of 70a, 71a, 72a and voice signal is then same as shown in Figure 2, and therefore not to repeat here.In addition, audio/video combination technology of the present invention can also be applied in KVM switcher (KVM switch) or KVM stretcher (KVM extender), that is, in KVM switcher or KVM stretcher, arrange framework as Fig. 1 or Fig. 2 receive with KVM switcher or stretcher the computer that couples the sound that provides and image.Utilize and signal of video signal and voice signal are synthesized, and transmit on the transmission line with four pairs of twisted-pair feeders.
Compared to prior art, signal transmitting apparatus according to the present invention carries out high-pass filtering and low-pass filtering to TMDS signal of video signal and numeral and/or analoging sound signal respectively by having the different filter by frequency range, makes only to need between conveyer and receiver can be smoothly through high-frequency frequency range in hybrid differential signal and low frequency frequency range by single bar grid line and transmits TMDS signal of video signal with digital and/or analoging sound signal simultaneously and can not produce any interference each other.Therefore, signal transmitting apparatus according to the present invention is interfered when grid line transmits except effectively avoiding TMDS signal of video signal, and then outside the signal transmitting quality of promotion signal transmitting device, do not need additionally to arrange other signal transacting due to signal transmitting apparatus or decode element can transmit TMDS signal of video signal and numeral and/or analoging sound signal simultaneously, therefore can effectively save hardware cost and signal processing time, the significantly market competitiveness of promotion signal transmitting device.
By the above detailed description of preferred embodiments, it is desirable to clearly to describe feature of the present invention and spirit, and not with above-mentioned disclosed preferred embodiment, category of the present invention is limited.On the contrary, its objective is wish to contain various change and tool equality be arranged in the present invention institute in the category of claim applied for.
Claims (28)
1. a signal transmitting apparatus, at least comprises:
One conveyer, it receives a pair digital differential signal and single-ended voice signal, this conveyer includes one single-ended/differential wave modular converter and has different one first filtration module by frequency range and one second filtration module, the input of this second filtration module couples this single-ended/differential wave modular converter and the output of this second filtration module couples the output of this first filtration module, this first filtration module carries out filtering to export a pair filtering figure differential wave to this to digital differential wave by frequency range according to one first, this single-ended voice signal is converted to pair of differential voice signal by this single-ended/differential wave modular converter, by frequency range, filtering is carried out to export the differential voice signal of a pair filtering to differential voice signal to this according to one second by this second filtration module again, this to filtering figure differential wave carry in this on the differential voice signal of filtering to synthesize a pair synthesis differential wave,
Pair of differential transmission line, couples this conveyer, in order to transmit this to synthesis differential wave; And
One receiver, in order to receive this to synthesis differential wave from this to differential transmission line, this receiver comprises one the 3rd filtration module, one the 4th filtration module and one differential/single-ended signal modular converter, this differential/single-ended signal modular converter couples the output of the 4th filtration module, 3rd filtration module according to this first by frequency range to this to synthesis differential wave carry out filtering to export this to digital differential wave, 4th filtration module according to this second by frequency range to this to synthesis differential wave carry out filtering to export this to differential voice signal, and by this differential/single-ended signal modular converter, this is converted to this single-ended voice signal to differential voice signal.
2. a conveyer, at least comprises:
One first filtration module, in order to carry out filtering to export a pair filtering figure differential wave by frequency range to a pair digital differential signal that an image source exports according to one first;
One single-ended/differential wave modular converter, in order to be converted to pair of differential voice signal by a digital SPDIF signal or single-ended analog voice signal; And
One second filtration module, its input couples this single-ended/differential wave modular converter and its output couples the output of this first filtration module, this second filtration module carries out filtering to export a pair filtering differential voice signal to this to differential voice signal by frequency range according to one second, this to filtering figure differential wave carry in this on the differential voice signal of filtering to synthesize a pair synthesis differential wave.
3. a receiver, comprises:
One receiving terminal, in order to receive a pair synthesis differential wave, this to synthesis differential wave synthesized by a pair digital differential signal and pair of differential voice signal, this to digital differential wave carry in this on differential voice signal;
One first filtration module, in order to carry out filtering to restore this to digital differential wave to this to synthesis differential wave by frequency range according to one first;
One second filtration module, in order to carry out filtering to restore this to differential voice signal to this to synthesis differential wave by frequency range according to one second; And
One differential/single-ended signal modular converter, couples the output of this second filtration module, in order to this is converted to digital SPDIF signal or a single-ended analog voice signal to differential voice signal.
4. a signal transmitting apparatus, at least comprises:
One conveyer, comprises:
One first filtration module, comprises multiple high pass filter unit, in order to carry out high-pass filtering to export multipair high-pass filtering digital differential signal to multipair digital differential signal respectively;
One single-ended/differential wave modular converter, in order to be converted at least one pair of differential voice signal by least one single-ended voice signal; And
One second filtration module, comprise at least one low-pass filter unit, its input couples this single-ended/differential wave modular converter and its output couples the output of this first filtration module, to this, at least one pair of differential voice signal carries out low-pass filtering to export the differential voice signal of at least one pair of low-pass filtering to this at least one low-pass filter unit, cause at least one pair of high-pass filtering digital differential signal carry of this multipair high-pass filtering digital differential signal on the differential voice signal of this at least one pair of low-pass filtering, to form at least one pair of synthesis differential wave;
Multipair differential transmission line, couples this conveyer, in order to the high-pass filtering digital differential signal transmitting this at least one pair of synthesis differential wave and do not synthesize with the differential voice signal of this at least one pair of low-pass filtering; And
One receiver, comprises:
One the 3rd filtration module, comprise the plurality of high pass filter unit, in order to carry out high-pass filtering to restore this multipair digital differential signal to this this at least one pair of synthesis differential wave and the high-pass filtering digital differential signal that do not synthesize with the differential voice signal of this at least one pair of low-pass filtering respectively;
One the 4th filtration module, comprises this at least one low-pass filter unit, this at least one low-pass filter unit to this at least one pair of synthesis differential wave carry out low-pass filtering to restore this at least one pair of differential voice signal; And
One differential/single-ended signal modular converter, couples the output of the 4th filtration module, in order at least one pair of differential voice signal is converted to this at least one single-ended voice signal by this.
5. signal transmitting apparatus as claimed in claim 4, it is characterized in that, in this conveyer, this multipair digital differential signal includes a pair digital clock pulse differential wave and multipair numerical data differential wave, the plurality of high pass filter unit includes a clock pulse high pass filter unit and multiple high-pass filtering data unit, this clock pulse high pass filter unit is crossed frequency range according to Maitong in a period of time and is carried out high-pass filtering to export a pair high-pass filtering numeral clock pulse differential wave to this to digital clock pulse differential wave, the plurality of high-pass filtering data unit carries out high-pass filtering to export multipair high-pass filtering numerical data differential wave by frequency range to this multipair numerical data differential wave according to data respectively, this at least one single-ended voice signal includes a single ended digital voice signal, and be converted to pair of differential digital audio signal via this single-ended/differential wave modular converter, this at least one low-pass filter unit includes a digital audio low-pass filter unit, this digital audio low-pass filter unit carries out low-pass filtering to this to differential digital voice signal by frequency range according to a digital audio, to export a pair low-pass filtering differential digital voice signal, make this to high-pass filtering numeral clock pulse differential wave carry in this on low-pass filtering differential digital voice signal, to synthesize one first to synthesis differential wave.
6. signal transmitting apparatus as claimed in claim 4, it is characterized in that, in this conveyer, this multipair digital differential signal includes a pair digital clock pulse differential wave and multipair numerical data differential wave, the plurality of high pass filter unit includes a clock pulse high pass filter unit and multiple high-pass filtering data unit, this clock pulse high pass filter unit is crossed frequency range according to Maitong in a period of time and is carried out high-pass filtering to export a pair high-pass filtering numeral clock pulse differential wave to this to digital clock pulse differential wave, the plurality of high-pass filtering data unit carries out high-pass filtering to export multipair high-pass filtering numerical data differential wave by frequency range to this multipair numerical data differential wave according to data respectively, this at least one single-ended voice signal includes two single-ended analog voice signals, and be converted to two pairs of differential analog voice signals via this single-ended/differential wave modular converter, this at least one low-pass filter unit includes two simulated sound low-pass filter units, this two simulated sounds low-pass filter unit carries out low-pass filtering by frequency range to these two pairs of differential analog voice signals according to a simulated sound respectively, to export two pairs of low-pass filtering differential analog voice signals respectively, the wantonly two pairs of high-pass filtering numerical data differential waves in this multipair high-pass filtering numerical data differential wave are made to distinguish carry on these two pairs of low-pass filtering differential analog voice signals, to synthesize one second to synthesis differential wave and the 3rd to synthesis differential wave.
7. signal transmitting apparatus as claimed in claim 4, it is characterized in that, this conveyer comprises further:
One buffer, is coupled to this first filtration module, in order to strengthen the intensity of this multipair digital differential signal, then exports this first filtration module to.
8. signal transmitting apparatus as claimed in claim 5, it is characterized in that, in this receiver, the plurality of high pass filter unit includes a clock pulse high pass filter unit and multiple high-pass filtering data unit, this clock pulse high pass filter unit is crossed frequency range according to Maitong in a period of time and is carried out high-pass filtering to export this to digital clock pulse differential wave to this first couple synthesis differential wave, the plurality of high-pass filtering data unit carries out high-pass filtering to export this numerical data differential wave by frequency range to the high-pass filtering digital differential signal do not synthesized with the differential voice signal of this at least one pair of low-pass filtering according to data respectively, this at least one low-pass filter unit includes a digital audio low-pass filter unit, this digital audio low-pass filter unit carries out low-pass filtering by frequency range to this first couple synthesis differential wave according to a digital audio, to export this to differential digital voice signal.
9. signal transmitting apparatus as claimed in claim 6, it is characterized in that, in this receiver, the plurality of high pass filter unit includes multiple high-pass filtering data unit, with respectively to this second and the 3rd to synthesizing differential wave and the high-pass filtering digital differential signal that do not synthesize with the differential voice signal of this at least one pair of low-pass filtering carries out high-pass filtering to export this multipair numerical data differential wave, this at least one low-pass filter unit includes two simulated sound low-pass filter units, this two simulated sounds low-pass filter unit carries out low-pass filtering to this second couple synthesis differential wave and the 3rd to synthesis differential wave by frequency range according to a simulated sound respectively, to export this two pairs of differential analog voice signals respectively.
10. signal transmitting apparatus as claimed in claim 4, it is characterized in that, in this conveyer, this high pass filter unit corresponding to the high-pass filtering digital differential signal do not synthesized with the differential voice signal of this at least one pair of low-pass filtering is coupled to earth terminal, in receiver, correspond to this high pass filter unit receiving the high-pass filtering digital differential signal do not synthesized with the differential voice signal of this at least one pair of low-pass filtering and be coupled to earth terminal.
11. signal transmitting apparatus as described in claim 5 or 8, it is characterized in that, this clock pulse comprises the frequency range being greater than 11MHz by frequency range, and these data comprise the frequency range being greater than 1.5MHz by frequency range, and this digital audio comprises the frequency range being less than 9MHz by frequency range.
12. signal transmitting apparatus as described in claim 6 or 9, it is characterized in that, this clock pulse comprises the frequency range being greater than 11MHz by frequency range, and these data comprise the frequency range being greater than 1.5MHz by frequency range, and this simulated sound comprises the frequency range being less than 530KHz by frequency range.
13. signal transmitting apparatus as claimed in claim 12, it is characterized in that, this receiver comprises further:
One compensator, is coupled to the 3rd filtration module, in order to compensate the intensity by this multipair digital differential signal of the 3rd filtration module.
14. 1 kinds of conveyers, at least comprise:
One first filtration module, comprises multiple high pass filter unit, in order to carry out high-pass filtering to export multipair high-pass filtering digital differential signal to multipair digital differential signal respectively;
One single-ended/differential wave modular converter, in order to be converted at least one pair of differential voice signal by least one digital SPDIF signal or single-ended analog voice signal; And
One second filtration module, comprise at least one low-pass filter unit, its input couples this single-ended/differential wave modular converter and its output couples the output of this first filtration module, to this, at least one pair of differential voice signal carries out low-pass filtering to export the differential voice signal of at least one pair of low-pass filtering to this at least one low-pass filter unit, cause at least one pair of high-pass filtering digital differential signal carry of this multipair high-pass filtering digital differential signal on the differential voice signal of this at least one pair of low-pass filtering, to form at least one pair of synthesis differential wave.
15. conveyers as claimed in claim 14, it is characterized in that, this multipair digital differential signal includes a pair digital clock pulse differential wave and multipair numerical data differential wave, the plurality of high pass filter unit includes a clock pulse high pass filter unit and multiple high-pass filtering data unit, this clock pulse high pass filter unit is crossed frequency range according to Maitong in a period of time and is carried out high-pass filtering to export a pair high-pass filtering numeral clock pulse differential wave to this to digital clock pulse differential wave, the plurality of high-pass filtering data unit carries out high-pass filtering to export multipair high-pass filtering numerical data differential wave by frequency range to this multipair numerical data differential wave according to data respectively, at least one single ended digital voice signal is converted to pair of differential digital audio signal via this single-ended/differential wave modular converter, this at least one low-pass filter unit includes a digital audio low-pass filter unit, this digital audio low-pass filter unit carries out low-pass filtering to this to differential digital voice signal by frequency range according to a digital audio, to export a pair low-pass filtering differential digital voice signal, this to high-pass filtering numeral clock pulse differential wave carry in this on low-pass filtering differential digital voice signal, to synthesize one first to synthesis differential wave.
16. conveyers as claimed in claim 15, it is characterized in that, in this conveyer, this multipair digital differential signal includes a pair digital clock pulse differential wave and multipair numerical data differential wave, the plurality of high pass filter unit includes a clock pulse high pass filter unit and multiple high-pass filtering data unit, this clock pulse high pass filter unit is crossed frequency range according to Maitong in a period of time and is carried out high-pass filtering to export a pair high-pass filtering numeral clock pulse differential wave to this to digital clock pulse differential wave, the plurality of high-pass filtering data unit carries out high-pass filtering to export multipair high-pass filtering numerical data differential wave by frequency range to this multipair numerical data differential wave according to data respectively, two single-ended analog voice signals are converted to two pairs of differential analog voice signals via this single-ended/differential wave modular converter, this at least one low-pass filter unit includes two simulated sound low-pass filter units, this two simulated sounds low-pass filter unit carries out low-pass filtering by frequency range to these two pairs of differential analog voice signals according to a simulated sound respectively, to export two pairs of low-pass filtering differential analog voice signals respectively, wantonly two pairs of high-pass filtering numerical data differential waves difference carry in this multipair high-pass filtering numerical data differential wave is on these two pairs of low-pass filtering differential analog voice signals, to synthesize one second to synthesis differential wave and the 3rd to synthesis differential wave.
17. conveyers as claimed in claim 15, is characterized in that, this high pass filter unit corresponding to the high-pass filtering digital differential signal do not synthesized with the differential voice signal of this at least one pair of low-pass filtering is coupled to earth terminal.
18. conveyers as claimed in claim 15, it is characterized in that, this clock pulse comprises the frequency range being greater than 11MHz by frequency range, and these data comprise the frequency range being greater than 1.5MHz by frequency range, and this digital audio comprises the frequency range being less than 9MHz by frequency range.
19. conveyers as claimed in claim 16, it is characterized in that, this clock pulse comprises the frequency range being greater than 11MHz by frequency range, and these data comprise the frequency range being greater than 1.5MHz by frequency range, and this simulated sound comprises the frequency range being less than 530KHz by frequency range.
20. conveyers as claimed in claim 14, is characterized in that, comprise further:
One buffer, is coupled to this first filtration module, in order to strengthen the intensity of this multipair digital differential signal, then exports this first filtration module to.
21. conveyers as claimed in claim 14, it is characterized in that, it more includes a switch, it couples mutually with this first filtration module and this single-ended/differential wave modular converter, this switch more with organize AV signal source more and couple mutually, each group AV signal source provides this multipair digital differential signal and this at least one pair of differential voice signal, this switch by switching controls to choose wherein one group of AV signal source by organizing in AV signal source more, this is selected this multipair digital differential signal and this at least one pair of differential transmission of sound signals that AV signal source provides to this first filtration module and this single-ended/differential wave modular converter.
22. 1 kinds of receivers, comprise:
One receiving terminal, in order to receive at least one pair of synthesis differential wave and at least one pair of high-pass filtering digital differential signal, each to synthesis differential wave by pair of differential voice signal and a pair digital differential signal syntheses, wherein this to digital differential wave carry in this on differential voice signal;
One first filtration module, comprises multiple high pass filter unit, in order to this, at least one pair of synthesis differential wave and this at least one pair of high-pass filtering digital differential signal carry out high-pass filtering to restore multipair digital differential signal respectively;
One second filtration module, comprises at least one low-pass filter unit, in order to this at least one pair of synthesis differential wave carry out low-pass filtering to restore this at least one pair of differential voice signal; And
One differential/single-ended signal modular converter, couples the output of this second filtration module, in order at least one pair of differential voice signal is converted at least one digital SPDIF signal or single-ended analog voice signal by this.
23. receivers as claimed in claim 22, it is characterized in that, this at least one pair of synthesis differential wave comprises one first to synthesis differential wave, this the first couple synthesis differential wave is synthesized by pair of differential digital audio signal and a pair digital clock pulse differential wave, the plurality of high pass filter unit includes a clock pulse high pass filter unit and at least one high-pass filtering data unit, this clock pulse high pass filter unit is crossed frequency range according to Maitong in a period of time and is carried out high-pass filtering to export this to digital clock pulse differential wave to this first couple synthesis differential wave, this at least one high-pass filtering data unit carries out high-pass filtering to export this numerical data differential wave by frequency range to this at least one high-pass filtering digital differential signal according to data respectively, this at least one low-pass filter unit includes a digital audio low-pass filter unit, this digital audio low-pass filter unit carries out low-pass filtering by frequency range to this first couple synthesis differential wave according to a digital audio, to export this to differential digital voice signal.
24. receivers as claimed in claim 22, it is characterized in that, this at least one pair of synthesis differential wave comprises one second to synthesis differential wave and the 3rd to synthesis differential wave, this the second couple synthesis differential wave and the 3rd to synthesis differential wave respectively by pair of differential analoging sound signal and to digital data synthesized by differential wave, this at least one high pass filter unit includes multiple high-pass filtering data unit, the plurality of high-pass filtering data unit respectively according to data by frequency range to second to synthesis differential wave, 3rd carries out high-pass filtering to export multipair numerical data differential wave to synthesis differential wave and this at least one pair of high-pass filtering digital differential signal, this at least one low-pass filter unit includes two simulated sound low-pass filter units, this two simulated sounds low-pass filter unit carries out low-pass filtering to this second couple synthesis differential wave and the 3rd to synthesis differential wave by frequency range according to a simulated sound respectively, to export this two pairs of differential analog voice signals respectively.
25. receivers as claimed in claim 22, is characterized in that, this high pass filter unit corresponding to the high-pass filtering digital differential signal do not synthesized with the differential voice signal of this at least one pair of low-pass filtering is coupled to earth terminal.
26. receivers as claimed in claim 23, it is characterized in that, this clock pulse comprises the frequency range being greater than 11MHz by frequency range, and these data comprise the frequency range being greater than 1.5MHz by frequency range, and this digital audio comprises the frequency range being less than 9MHz by frequency range.
27. receivers as claimed in claim 24, it is characterized in that, this clock pulse comprises the frequency range being greater than 11MHz by frequency range, and these data comprise the frequency range being greater than 1.5MHz by frequency range, and this simulated sound comprises the frequency range being less than 530KHz by frequency range.
28. receivers as claimed in claim 22, is characterized in that, comprise further:
One compensator, is coupled to this second filtration module, in order to compensate the intensity by this multipair digital differential signal of this second filtration module.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW100122483 | 2011-06-27 | ||
| TW100122483A TWI499302B (en) | 2011-06-27 | 2011-06-27 | Signal transmitting apparatus and transmitter and receiver thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102857754A CN102857754A (en) | 2013-01-02 |
| CN102857754B true CN102857754B (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110253958.8A Active CN102857754B (en) | 2011-06-27 | 2011-08-24 | Signal transmission device and transmitter and receiver thereof |
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| CN (1) | CN102857754B (en) |
| TW (1) | TWI499302B (en) |
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| WO2017008196A1 (en) * | 2015-07-10 | 2017-01-19 | 海能达通信股份有限公司 | Circuit for inhibiting single-ended analogue signal noise, and terminal attachment |
| TWI561073B (en) * | 2015-09-10 | 2016-12-01 | Aten Int Co Ltd | Multimedia signal transmission device and transmission method thereof |
| TWI578126B (en) * | 2015-10-13 | 2017-04-11 | 大量科技股份有限公司 | Signal transmission apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101170658A (en) * | 2006-10-25 | 2008-04-30 | 晨星半导体股份有限公司 | Television tuner |
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| CN1238837C (en) * | 1996-10-15 | 2006-01-25 | 松下电器产业株式会社 | Image coding method and device |
| US20070252659A1 (en) * | 2004-10-14 | 2007-11-01 | Hiroshi Suenaga | Filter Circuit, Differential Transmission System Having Same, and Power Supply |
| CN103428003B (en) * | 2008-12-11 | 2017-03-01 | 美国莱迪思半导体公司 | Video and the electrical power transmission system of digital audio interaction interface |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101170658A (en) * | 2006-10-25 | 2008-04-30 | 晨星半导体股份有限公司 | Television tuner |
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|---|---|
| TW201301890A (en) | 2013-01-01 |
| TWI499302B (en) | 2015-09-01 |
| CN102857754A (en) | 2013-01-02 |
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