CN102857754A - Signal transmission device and transmitter and receiver thereof - Google Patents

Signal transmission device and transmitter and receiver thereof Download PDF

Info

Publication number
CN102857754A
CN102857754A CN2011102539588A CN201110253958A CN102857754A CN 102857754 A CN102857754 A CN 102857754A CN 2011102539588 A CN2011102539588 A CN 2011102539588A CN 201110253958 A CN201110253958 A CN 201110253958A CN 102857754 A CN102857754 A CN 102857754A
Authority
CN
China
Prior art keywords
differential
pair
digital
filter unit
pass filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2011102539588A
Other languages
Chinese (zh)
Other versions
CN102857754B (en
Inventor
沈福进
黄和村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aten International Co Ltd
Original Assignee
Aten International Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aten International Co Ltd filed Critical Aten International Co Ltd
Publication of CN102857754A publication Critical patent/CN102857754A/en
Application granted granted Critical
Publication of CN102857754B publication Critical patent/CN102857754B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Amplifiers (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

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

Signal transmitting apparatus and conveyer thereof and receiver
Technical field
The present invention is relevant with the signal transmission, particularly about a kind of signal transmitting apparatus and conveyer and receiver, need not extra set handling or decode element, filter synthetic video that can be by having different frequency and signal of video signal and can't be interfering with each other between the two.
Background technology
In recent years, the multimedia video technical development gets quite rapid.For example, can integrate high-resolution multimedia interface (the High-Definition Multimedia Interface that sound and image transmit together, HDMI) or digital video interface (Digital Visual Interface, DVI), since its by same cable transmission without the compression audio signal and have high-resolution vision signal, need not carry out analog signal conversion and become digital signal (A/D) or digital signal to convert the program of analog signal (D/A) to, so can reach the target of undistorted output.
Take the video-audio signal of HDMI as example, 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 transition minimized differential signaling (the Transition Minimized Differential Signaling with 1080P, TMDS) be example, because the vertical direction of 1080P representative picture has 1080 horizontal scanning lines, its picture resolution is quite high by 1920 * 1080, so frequency range required during its transmission is larger, is about 1.65Gbps.Therefore, when the transition minimized differential signaling of frequency 1650MHz passes through the CAT-5 Double-strand transmission, only can transmit about 40 meters far away, in case when the audio-visual input of high-resolution multimedia interface and the transmission range between the audio-visual output are longer, be arranged at the design that signal extender between audio-visual input and the audio-visual output needs duplicator (repeater) usually.
Because the HDMI characteristics of signals is under the image output of high image quality and can't transmit long distance, and quite expensive on the holding wire price of HDMI special use, therefore, how to use the comparatively cheap wire rod of price to grow the HDMI signal transmission of distance, just become a difficult problem of demanding urgently overcoming.Traditionally, because CAT-5 or CAT-6 grid line only include four pairs of differential transmission lines, but the signal of video signal of DVI or HDMI (TMDS) itself namely needs to transmit by four pairs of differential transmission lines, and digital audio signal (for example SPDIF) and/or analoging sound signal also need be carried on these four pairs of differential transmission lines, therefore, in order only to realize between the conveyer of signal extender and receiver, arranging the target of a CAT-5 grid line, the extra signalization of general most need is processed or decode element, DSP for example, MCU, FPGA or coder/decoder etc., in order to the TMDS signal of video signal, digital audio signal and/or analoging sound signal carry out the program that signal is processed, so that digital audio signal and/or analoging sound signal are stated from the TMDS signal of video signal.
Yet the above-mentioned practice not only causes between TMDS signal of video signal and the voice signal interfering with each other easily, and need to expend more hardware cost and long signal processing time, has seriously weakened the market competitiveness of signal extender.
Summary of the invention
Therefore, the present invention proposes a kind of signal transmitting apparatus and conveyer and receiver, to solve the above-mentioned variety of problems that prior art was suffered 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 have different the first filtration module and the second filtration modules by frequency range.The output of the input of the second filtration module couples single-ended/differential wave modular converter and the second filtration module couples the output of the first filtration module.The first filtration module carries out filtering to export a pair of filtering figure differential wave by frequency range to a pair of digital differential signal that receives the self imaging source according to first.Single-ended/differential wave modular converter is converted to the pair of differential voice signal with single-ended voice signal, by frequency range this is carried out filtering to export the differential voice signal of a pair of filtering to differential voice signal according to second by the second filtration module again.This synthesizes a pair of synthetic differential wave to filtering figure differential wave and this to the differential voice signal of filtering.This couples conveyer to differential transmission line, should be to synthetic differential wave in order to transmission.
Receiver receives differential transmission line from this should be to synthetic differential wave, 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.The 3rd filtration module carries out filtering to export this to digital differential wave to this to synthetic differential wave by frequency range according to first.The 4th filtration module carries out filtering to this to synthetic differential wave by frequency range according to second and is somebody's turn to do differential voice signal with output, and should be converted to single-ended voice signal to differential voice signal by differential/single-ended signal modular converter.
In another specific embodiment, signal transmitting apparatus comprises conveyer, many to differential transmission line and receiver.Conveyer comprises the first filtration module, single-ended/differential wave modular converter and the second filtration module.The first filtration module comprises a plurality of high pass filter unit, in order to respectively to receive the self imaging source many that digital differential wave is carried out high-pass filtering is many to high-pass filtering digital differential signal to export.Single-ended/differential wave modular converter is in order to be converted at least one pair of differential voice signal with at least one single-ended voice signal.The 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.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 to this, cause the differential voice signal of this at least one pair of low-pass filtering to be blended into this many at least one pair of high-pass filtering digital differential signals to high-pass filtering digital differential signal, many to synthetic differential wave to form.Many differential transmission line is coupled conveyer, should be many to synthesizing differential wave in order to transmission.
Receiver comprises the 3rd filtration module, the 4th filtration module and differential/single-ended signal modular converter.The 3rd filtration module comprises this a plurality of high pass filter unit, in order to many that synthetic differential wave is carried out high-pass filtering is many to digital differential wave to restore this to this respectively, and exports image display to.The 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 manyly carries out low-pass filtering to restore this at least one pair of differential voice signal to synthetic differential wave to this.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 with this.
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 have different the first filtration module and the second filtration modules by frequency range.The output of the input of the second filtration module couples single-ended/differential wave modular converter and the second filtration module couples the output of the first filtration module.The first filtration module carries out filtering to export a pair of filtering figure differential wave by frequency range to a pair of digital differential signal that receives the self imaging source according to first.Single-ended/differential wave modular converter is converted to the pair of differential voice signal with single-ended voice signal, by frequency range this is carried out filtering to export the differential voice signal of a pair of filtering to differential voice signal according to second by the second filtration module again.This synthesizes a pair of synthetic 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.The first filtration module comprises a plurality of high pass filter unit, in order to respectively to receive the self imaging source many that digital differential wave is carried out high-pass filtering is many to high-pass filtering digital differential signal to export.Single-ended/differential wave modular converter is in order to be converted at least one pair of differential voice signal with at least one single-ended voice signal.The 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.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 to this, cause the differential voice signal of this at least one pair of low-pass filtering to be blended into this many at least one pair of high-pass filtering digital differential signals to high-pass filtering digital differential signal, many to synthetic differential wave to form.
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 of synthetic differential wave, and this is synthetic by a pair of digital differential signal and pair of differential voice signal to synthetic 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.The first filtration module carries out filtering to export this to digital differential wave to this to synthetic differential wave by frequency range according to first.The second filtration module carries out filtering to this to synthetic differential wave by frequency range according to second and is somebody's turn to do differential voice signal with output, and should be converted to single-ended voice signal to differential voice signal by differential/single-ended signal modular converter.
In another specific embodiment, receiver comprises the first filtration module, the second filtration module and differential/single-ended signal modular converter.The first filtration module comprises a plurality of high pass filter unit, in order to many that synthetic differential wave is carried out high-pass filtering is many to digital differential wave to restore this to this respectively, and exports image display to.The 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 manyly carries out low-pass filtering to restore this at least one pair of differential voice signal to synthetic differential wave to this.Differential/single-ended signal modular converter couples the output of the second filtration module, in order at least one pair of differential voice signal is converted at least one single-ended voice signal with this.
Can be further understood by the following detailed description and accompanying drawings about the advantages and spirit of the present invention.
Description of drawings
Fig. 1 illustrates the schematic diagram according to the signal transmitting apparatus of 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 are the schematic diagram of synthetic 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 modules 202,43: the second filtration modules
221,62: the three filtration modules 222,63: the four filtration modules
DD ±: a pair of digital differential signal FDD ±: a pair of filtering figure differential wave
SA: single-ended voice signal DA ±: the pair of differential voice signal
SD ±: a pair of synthetic differential wave FDA ±: the differential voice signal of a pair of filtering
203,41: single-ended/the differential wave modular converter
223: differential/the 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: the simulated sound output device
L1～L4: first pair of differential transmission line～4th pair differential transmission line
40: buffer 44: the 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 of digital clock pulse differential wave
FDC ±: a pair of 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 audio signal DDA ±: the pair of differential digital audio signal
FDDA ±: a pair of low-pass filtering differential digital voice signal
SAA1, SAA2: single-ended analoging sound signal
DAA1 ±, DAA2 ±: two pairs of differential analoging sound signals
FDAA1 ±, FDAA2 ±: two pairs of differential analoging sound signals of low-pass filtering
SD1 ±～SD4 ±: first pair of synthetic differential wave～4th pair synthetic differential wave
5: grid line 48: switch
60: compensator 61: differential/the single-ended signal modular converter
64: differential signal receiver
S TMDS (data): TMDS data-signal DD2 ±/DD3 ±
S Audio: differential analoging sound signal DAA1 ±/DAA2 ±
S Mix: the high-pass filtering numerical data differential wave FDD2 of mixing ±/FDD3 ±
S TMDS (CLK): TMDS clock signal DC ±
S SPDIF: the 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 integrate high-resolution multimedia interface or the transmission keyboard-mouse-display switch (KVM switch) that sound and image transmit together, but not as limit.Since the high-resolution multimedia interface by the transmission of consolidated network line without the compression audio signal and have high-resolution vision signal, need not carry out analog signal conversion and become digital signal (A/D) or digital signal to convert the program of analog signal (D/A) to, so can reach the target of undistorted output.
Please refer to Fig. 1, Fig. 1 illustrates the schematic diagram of the signal transmitting apparatus among this embodiment.As shown in Figure 1, signal transmitting apparatus 2 is coupled between the first electronic installation 1 and the second electronic device 3.Wherein, the first electronic installation 1 is for having the video and audio output device of high-resolution multimedia interface, such as blue-ray DVD player or have digitized video HDMI or the computer of DVI output or server etc., but not as limit; Second electronic device 3 is the audio-visual display unit that includes the high-resolution multimedia interface, the Digital Television, family's theater audio-visual equipment or the projection display equipment that for example have high image quality, but also not as limit.
In addition, signal transmitting apparatus 2 received digital image signal and voice signals can be from same the first electronic installation 1, or from the first different electronic installations 1, that is image source and sound source can be same the first electronic installation 1 or the first different electronic installations 1, there is no specific restriction.In like manner, signal transmitting apparatus 2 also can export digital image signal and voice signal to same second electronic device 3 or different second electronic devices 3.
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 the receiver 22.In this embodiment, transmission line 21 has at least one pair of above twisted-pair feeder, can also be made of CAT-5 or CAT-6 twisted-pair feeder (category 5or category 6cable), for example: Cat-5e, Cat-6, Cat-6e etc., it has four pairs of differential transmission lines, but not as limit.In fact, can carry out the transmission of signal by high-definition multimedia interface (HDMI), digital video interface (DVI) or digital-to-analog message interface between conveyer 20 and the first electronic installation 1 and between receiver 22 and the second electronic device 3, there is no specific restriction.Present embodiment describes as example from same the first electronic installation 1 take digital image signal and voice signal.
As shown in Figure 1, conveyer 20 includes at least and has different the first filtration module 201 and the second filtration module 202 and single-ended/differential wave modular converters 203 by frequency range.The output of the input of the second filtration module 202 couples single-ended/differential wave modular converter 203 and 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 a pair of digital differential signal DD that is received from the first electronic installation 1 ± carry out filtering with export a pair of filtering figure differential wave FDD ±.Single-ended/differential wave modular converter 203 with single-ended voice signal SA be converted to pair of differential voice signal DA ±, again 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 of filtering ±.This to filtering figure differential wave FDD ± with this to a pair of synthetic differential wave SD of the differential voice signal FDA of filtering ± synthesize ±, and should be to synthetic differential wave SD ± transfer to receiver 22 by the pair of differential transmission line in the transmission line 21.
As shown in Figure 3A, this figure is synthetic differential wave schematic diagram.In Fig. 3 A, only with differential explanation the just, this is to the differential voice signal FDA of filtering ± be the differential voice signal of a simulation, and this to filtering figure differential wave FDD ± carry in this to filtering differential voice signal FDA ± on; Cooperate Fig. 2, the signal S among Fig. 3 A TMDS (data)For through the TMDS data-signal DD2 of the second data high pass filter unit 423/ the 3rd data high pass filter unit 424 among Fig. 2 ±/DD3 ±, and signal S AudioFor through the differential analoging sound signal DAA1 of the first simulated sound low-pass filter unit 432/ second simulated sound low-pass filter unit 433 ±/DAA2 ±, and signal S MixThen for the high-pass filtering numerical data differential wave FDD2 that mixes ±/FDD3 ±.Shown in Fig. 3 B, with differential explanation the just, 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 filtering differential voice signal FDA ± on; Cooperate Fig. 2, the signal S among Fig. 3 B TMDS (CLK)For through the TMDS clock signal DC of clock pulse high pass filter unit 421 ±, signal S SPDIFBe the SPDIF signal through digital audio low-pass filter unit 431, and signal S Mix (FDC)For the high-pass filtering numeral clock pulse differential wave FDC that mixes ±.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 the distance that signal transmits and the interference that can avoid noise.
Receiver 22 includes the 3rd filtration module 221, the 4th filtration module 222 and differential/single-ended signal modular converter 223 at least.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 in the receiver 22 automatic network lines 21 this differential transmission line is received this to synthetic differential wave SD ± after, the 3rd filtration module 221 according to first by frequency range to this to synthetic differential wave SD ± carry out filtering to export this to digital differential wave DD ± to second electronic device 3.The 4th filtration module 222 according to second by frequency range to this to synthetic differential wave SD ± carry out filtering with output should to differential voice signal DA ±, and should be to differential voice signal DA ± be converted to single-ended voice signal SA by differential/single-ended signal modular converter 223, and export second electronic device 3 to.In fact, differential/single-ended signal modular converter 223 can include operational amplifier (Operational Amplifier).Should be 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 that originally inputed 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 of conveyer 20 and the 3rd filtration module 221 of receiver 22 all adopt first by frequency range respectively to this to digital differential wave DD ± and should be to synthetic differential wave SD ± carry out high-pass filtering.In practical application, if this is to digital differential wave DD ± be a pair of digital clock pulse differential wave (for example TMDS clock signal), because the frequency range of general digital clock pulse differential wave is approximately between between the 20MHz to 225MHz, therefore, of the present invention first is set as frequency range more than the 11MHz by frequency range, so that this can be by this high-pass filtering program institute filtering to the noise outside the digital clock pulse differential wave; If this is to digital differential wave DD ± be a differential wave (for example TMDS data-signal) to digital data, because the frequency range of general numerical data differential wave is approximately between between the 10MHz to 1.125GHz, therefore, of the present invention first is set as frequency range more than the 1.5MHz by frequency range so that this noise outside differential wave can be by this high-pass filtering program institute filtering to digital data.
As for the 4th filtration module 222 of the second filtration module 202 of conveyer 20 and receiver 22 all adopt second by frequency range respectively to this to differential voice signal DA ± and should be to synthetic differential wave SD ± carry out low-pass filtering.In practical application, if should be to differential voice signal DA ± be a pair of digital audio differential wave (for example SPDIF signal), because the frequency range of general digital audio differential wave is approximately less than 8MHz, therefore, of the present invention second is set as frequency range more than the 9MHz by frequency range, so that this can be by this low-pass filtering program institute filtering to the noise outside the digital audio differential wave; If should be to a pair of simulated sound differential wave of differential voice signal DA ± be (stereophonic signal for example, monophony or left and right sides dual track), because the frequency range of the simulated sound differential wave that common people's ear can be heard is approximately less than 22KHz, therefore, of the present invention second is set as frequency range more than the 530KHz by frequency range, so that this can be by this low-pass filtering program institute filtering to the noise outside the 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 the receiver 6.Digitized video source 70 is for having the video and audio output device of high-resolution multimedia interface, such as blue-ray DVD player or have digitized video HDMI or the computer of DVI output or server etc., 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, has the dual track message of analog format in order to generation, and L channel stereophonic signal and R channel stereophonic signal are to conveyer 4.Digitized video output device 80 for example has Digital Television or the projection display equipment of high image quality for to have the audio-visual display unit of high-resolution multimedia interface, but also not as limit.Although be noted that in the present embodiment, simulation source of sound 72 is simultaneously existence with digital tone source 71, actually, and not take embodiment shown in Figure 2 as restriction.For example, also can only there be digital tone source 71 to exist, or only has simulation source of sound 72 to exist.
Be described in detail with regard to conveyer 4 at first, first.Conveyer 4 includes buffer (buffer) 40, single-ended/differential wave modular converter 41, the first filtration module 42, the 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 the RJ-45 signal transmitter, and present embodiment is the connector of RJ-45.The first filtration module 42 includes four high passes (high-pass) filter unit 421～424 and the second filtration module comprises three low passes (low-pass) filter unit 431～433.These four high pass filter unit 421～424 are respectively clock pulse high pass filter unit 421, the first data high pass filter unit 422, the second data high pass filter unit 423 and the 3rd data high pass filter unit 424.These three low-pass filter units 431～433 are respectively digital audio low-pass filter unit 431, the first simulated sound low-pass filter unit 432 and the second simulated sound low-pass filter unit 433.
As shown in Figure 2, the input of clock pulse high pass filter unit 421, the first data high pass filter unit 422, the second data high pass filter unit 423 and the 3rd data high pass filter unit 424 all couples buffer 40; The input of digital audio low-pass filter unit 431, the 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, the first data high pass filter unit 422, the second data high pass filter unit 423 and the 3rd data high pass filter unit 424 all couples differential wave conveyer 44; The output of digital audio low-pass filter unit 431 is coupled between the output and differential wave conveyer 44 of clock pulse high pass filter unit 421; The output of the first simulated sound low-pass filter unit 432 is coupled between the output and differential wave conveyer 44 of the second data high pass filter unit 423; The output of the second simulated sound low-pass filter unit 433 is coupled between the output and differential wave conveyer 44 of the 3rd data high pass filter unit 424; The end of inductance element (or magnetic bead element) L is coupled to earth terminal G, and the other end is coupled between the output and differential wave conveyer 44 of the first data high pass filter unit 422.The purpose that is noted that end G is for the voltage quasi position of conveyer and receiver can mutually be mated with being coupled to, causes to avoid abnormal electrical pressure reduction between conveyer and receiver that wherein a damaged on end is bad; And the mode of ground connection is not take inductance or magnetic bead element as restriction.
It should be noted that, the output of the first simulated sound low-pass filter unit 432 is not must be coupled between the output and differential wave conveyer 44 of the second data high pass filter unit 423, and the output of the second simulated sound low-pass filter unit 433 is also not necessarily leaveed no choice but be coupled between the output and differential wave conveyer 44 of the 3rd data high pass filter unit 424.In fact, the output of the first simulated sound low-pass filter unit 432 and the second simulated sound low-pass filter unit 433 can be coupled between the output and differential wave conveyer 44 of the first data high pass filter unit 422, appoint both between the output of the second data high pass filter unit 423 and the differential wave conveyer 44 and between the output of the 3rd data high pass filter unit 424 and the differential wave conveyer 44.Then be coupled to earth terminal G by inductance element (or magnetic bead element) L as for the another one among the three.Present embodiment is brought in end G with the output of the first data high pass filter unit 422 with being coupled to.
When buffer 40 receive from digitized video source 70 four pairs of digital differential waves (comprise a pair of digital clock pulse differential wave DC ± and three to digital data differential wave DD1 ±, 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, the digital differential wave DC of this four couple after buffer 40 will strengthen ±, DD1 ±, DD2 ± and DD3 ± export to respectively clock pulse high pass filter unit 421, the first data high pass filter unit 422, the second data high pass filter unit 423 and the 3rd data high pass filter unit 424 of the first filtration module 42.Be noted that buffer 40 of the present invention and non-essential element, it can be looked transmission range and determine whether will use, if transmission range length can be used 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 of high-pass filtering numeral clock pulse differential wave FDC ±; The first data high pass filter unit 422, the second data high pass filter unit 423 and the 3rd data high pass filter unit 424 respectively data-drivens 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 (for example TMDS clock signal) is approximately between between the 20MHz to 225MHz, therefore, clock pulse of the present invention is set as frequency range more than the 11MHz by frequency range so that this to digital clock pulse differential wave DC ± outside noise can be by this high-pass filtering program institute filtering.In addition, because the frequency range of general numerical data differential wave (for example TMDS data-signal) is approximately between between the 10MHz to 1.125GHz, therefore, data communication device of the present invention is crossed frequency range and is set as the above frequency range of 1.5MHz so that this noise outside differential wave can be by this high-pass filtering program institute filtering to digital data.
On the other hand, when single-ended/differential wave modular converter 41 receives single-ended digital audio signal SDA and two single-ended analoging sound signal SAA1 from digital tone source 71 and simulation source of sound 72 respectively, during SAA2, single-ended/differential wave modular converter 41 will be respectively single-ended digital audio signal SDA and two single-ended analoging sound signal SAA1, SAA2 be converted to pair of differential digital audio signal DDA ± and the two couples of differential analoging sound signal DAA1 ±, DAA2 ±, and with this to differential digital voice signal DDA ± export to digital audio low-pass filter unit 431, and with the differential analoging sound signal DAA1 of this two couple ±, DAA2 ± export to the first simulated sound low-pass filter unit 432 and the second simulated sound low-pass filter unit 433.
When digital audio low-pass filter unit 431 receives 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 of low-pass filtering differential digital voice signal FDDA ± between clock pulse high pass filter unit 421 and the differential wave conveyer 44, so that this to low-pass filtering differential digital voice signal FDDA ± can export with clock pulse high pass filter unit 421 this to first couple of synthetic differential wave SD1 of high-pass filtering numeral clock pulse differential wave FDC ± synthesize ±, and export first couple of differential transmission line L1 in the grid line 5 to by differential wave conveyer 44.
When the first simulated sound low-pass filter unit 432 receives first pair of differential analoging sound signal DAA1 ± time, the first simulated sound low-pass filter unit 432 according to simulated sound by frequency range to first couple of differential analoging sound signal DAA1 ± carry out low-pass filtering, to export first couple of differential analoging sound signal FDAA1 of low-pass filtering ± between the second data high pass filter unit 423 and the differential wave conveyer 44, so that the first couple of differential analoging sound signal FDAA1 of low-pass filtering ± the 3rd couple of synthetic differential wave SD3 of second couple of high-pass filtering numerical data differential wave FDD2 that can export with the second data high pass filter unit 423 ± synthesize ±, and export the 3rd couple of differential transmission line L3 in the grid line 5 to by differential wave conveyer 44.
In like manner, when the second simulated sound low-pass filter unit 433 receives second pair of differential analoging sound signal DAA2 ± time, the second simulated sound low-pass filter unit 433 according to simulated sound by frequency range to second couple of differential analoging sound signal DAA2 ± carry out low-pass filtering, to export second couple of differential analoging sound signal FDAA2 of low-pass filtering ± between the 3rd data high pass filter unit 424 and the differential wave conveyer 44, so that the second couple of differential analoging sound signal FDAA2 of low-pass filtering ± the 4th couple of synthetic differential wave SD4 of the 3rd couple of high-pass filtering numerical data differential wave FDD3 that can export with the 3rd data high pass filter unit 424 ± synthesize ±, and export the 4th couple of differential transmission line L4 in the grid line 5 to by differential wave conveyer 44.The first couple of high-pass filtering numerical data differential wave FDD1 that exports as for the first data high pass filter unit 422 ± export second couple of differential transmission line L2 in the grid line 5 to by differential wave conveyer 44, this to high-pass filtering numerical data differential wave with SD2 ± expression.
In fact, because the frequency range of general digital audio differential wave (for example SPDIF signal) is approximately less than 8MHz, therefore, digital audio of the present invention is set as frequency range more than the 9MHz by frequency range so that this to digital audio differential wave DDA ± outside noise can be by this low-pass filtering program institute filtering.In addition, because the frequency range of the simulated sound differential wave (for example stereophonic signal) that common people's ear can be heard is approximately less than 22KHz, therefore, simulated sound of the present invention is set as frequency range more than the 530KHz by frequency range so that these two couples of simulated sound differential wave DAA1 ± and DAA2 ± outside noise can be by this low-pass filtering program institute filtering.Screening combination by high pass and low pass frequency range, in the time of can allowing the combination of signal of video signal and voice signal, can the phase mutual interference and image and voice signal can transmitted twisted-pair feeder same simultaneously.In addition, such as the configuration of Fig. 2 embodiment, can enable voice (simulation, numeral or simulation with digital combination) and image (such as DVI or HDMI) transmit at single Cat 5. transmission lines.
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 the magnetic bead element to replace it, and differential signal receiver 64 can be the 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 respectively clock pulse high pass filter unit 621, the first data high pass filter unit 622, the second data high pass filter unit 623 and the 3rd data high pass filter unit 624.These three low-pass filter units 631～633 are respectively digital audio low-pass filter unit 631, the first simulated sound low-pass filter unit 632 and the second simulated sound low-pass filter unit 633.
As shown in Figure 2, the output of clock pulse high pass filter unit 621, the first data high pass filter unit 622, the second data high pass filter unit 623 and the 3rd data high pass filter unit 624 all couples compensator 60; The output of digital audio low-pass filter unit 631, the 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, the first data high pass filter unit 622, the second data high pass filter unit 623 and the 3rd data high pass filter unit 624 all couples differential signal receiver 64; The input of the input of the input of digital audio low-pass filter unit 631, the first simulated sound low-pass filter unit 632 and the second simulated sound low-pass filter unit 633 also is coupled on three pairs of twisted-pair feeders that differential signal receiver 64 has.
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 between the input and differential signal receiver 64 of the first data high pass filter unit 622, appoint both between the input of the second data high pass filter unit 623 and the differential signal receiver 64 and between the input of the 3rd data high pass filter unit 624 and the differential signal receiver 64.In the present embodiment, digital audio low-pass filter unit 631 is coupled between the input and differential signal receiver 64 of clock pulse high pass filter unit 621; The input of the first simulated sound low-pass filter unit 632 is coupled between the input and differential signal receiver 64 of the second data high pass filter unit 623; And the input of the second simulated sound low-pass filter unit 633 also is coupled between the input of the 3rd data high pass filter unit 624 and the differential signal receiver 64 to receive synthetic differential wave.Then be coupled to earth terminal G by inductance component L as for the another one among the three.In the present embodiment, utilize the end of inductance element (or magnetic bead element) L to be coupled to earth terminal G, the other end is coupled between the input and differential signal receiver 64 of the first data high pass filter unit 622; The mode that couples ground connection is not limited with inductance element and magnetic bead element.In the present embodiment, the input of above-mentioned the first simulated sound low-pass filter unit 632 and the second simulated sound low-pass filter unit 633 couple the relation that couples of input that relation corresponds to the first simulated sound low-pass filter unit 432 and the second simulated sound low-pass filter unit 433, but not as limit.
First couple of differential transmission line L1 in differential signal receiver 64 difference automatic network lines 5, second couple of differential transmission line L2, the 3rd couple of differential transmission line L3 and the 4th couple of differential transmission line L4 receive first couple of synthetic differential wave SD1 ±, high-pass filtering numerical data differential wave SD2 ±, the 3rd couple of synthetic differential wave SD3 ± and the 4th couple of synthetic differential wave SD4 ± time, differential signal receiver 64 respectively with first couple of synthetic differential wave SD1 ±, high-pass filtering numerical data differential wave SD2 ±, the 3rd couple of synthetic differential wave SD3 ± and the 4th couple of synthetic differential wave SD4 ± be sent to clock pulse high pass filter unit 621, the first data high pass filter unit 622, the second data high pass filter unit 623 and the 3rd data high pass filter unit 624.
Clock pulse high pass filter unit 621 according to clock pulse by frequency range to first couple of synthetic differential wave SD1 ± carry out high-pass filtering, to export this to digital clock pulse differential wave DC ± to compensator 60; The first data high pass filter unit 622, the second data high pass filter unit 623 and the 3rd data high pass filter unit 624 respectively data-drivens by frequency range to high-pass filtering numerical data differential wave SD2 ±, the 3rd couple of synthetic differential wave SD3 ± and the 4th couple of synthetic 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 (for example TMDS clock signal) is approximately between between the 20MHz to 225MHz, therefore, clock pulse of the present invention is set as frequency range more than the 11MHz by frequency range so that the first couple of synthetic 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 (for example TMDS data-signal) is approximately between between the 10MHz to 1.125GHz, therefore, data communication device of the present invention is crossed frequency range and is set as the above frequency range of 1.5MHz so that high-pass filtering numerical data differential wave SD2 ±, the 3rd couple of synthetic differential wave SD3 ± and the 4th couple of synthetic differential wave SD4 ± by only remain respectively after the high-pass filtering program this three to digital data differential wave DD1 ±, DD2 ± with DD3 ±.
Because the input of digital audio low-pass filter unit 631 is coupled between the input and differential signal receiver 64 of clock pulse high pass filter unit 621, therefore, digital audio low-pass filter unit 631 will receive first couple of synthetic differential wave SD1 ± and according to digital audio by frequency range to first couple of synthetic 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.Because the input of the first simulated sound low-pass filter unit 632 is coupled between the input and differential signal receiver 64 of the second data high pass filter unit 623, therefore, the first simulated sound low-pass filter unit 632 will receive the 3rd couple of synthetic differential wave SD3 ± and according to simulated sound by frequency range to the 3rd couple of synthetic differential wave SD3 ± carry out low-pass filtering, to export first couple of differential analoging sound signal DAA1 ± to differential/single-ended signal modular converter 61.In like manner, because the input of the second simulated sound low-pass filter unit 633 is coupled between the input and differential signal receiver 64 of the 3rd data high pass filter unit 624, therefore, the second simulated sound low-pass filter unit 633 will receive the 4th couple of synthetic differential wave SD4 ± and according to simulated sound by frequency range to the 4th couple of synthetic differential wave SD4 ± carry out low-pass filtering, to export second couple of differential analoging sound signal DAA2 ± to differential/single-ended signal modular converter 61.
In fact, because the frequency range of general digital audio differential wave (for example SPDIF signal) is approximately less than 8MHz, therefore, digital audio of the present invention is set as frequency range more than the 9MHz by frequency range so that the first couple of synthetic differential wave SD1 ± by only remain after this low-pass filtering program this to digital audio differential wave DDA ±.In addition, because the frequency range of the simulated sound differential wave (for example stereophonic signal) that common people's ear can be heard is approximately less than 22KHz, therefore, simulated sound of the present invention is set as frequency range more than the 530KHz by frequency range so that the 3rd couple of synthetic differential wave SD3 ± and the 4th couple of synthetic differential wave SD4 ± by only remain after the 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, since 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, produce easily the decay of 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 after will compensating this to digital clock pulse differential wave DC ± and this three to digital data differential wave DD1 ±, DD2 ± with DD3 ± export to digitized video output device 80.
When differential/single-ended signal modular converter 61 receive this to differential digital voice signal DDA ±, the first couple of differential analoging sound signal DAA1 ± and second pair of differential analoging sound signal DAA2 ± time, differential/single-ended signal modular converter 61 will be respectively with this to differential digital voice signal DDA ±, the first couple of differential analoging sound signal DAA1 ± and the second couple of differential analoging sound signal DAA2 ± be converted to this to single-ended digital audio signal SDA, first couple of single-ended analoging sound signal SAA1 and second couple of single-ended analoging sound signal SAA2, and should export digital audio output device 81 to single-ended digital audio signal SDA, and export first couple of single-ended analoging sound signal SAA1 and second couple of single-ended analoging sound 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 couple many group AV signal sources by a switch 48.In fact, switch 48 visual actual demands are integrated in the conveyer 4 or are arranged at conveyer 4 and couple with conveyer 4 outward, there is no specific restriction.For example: in Fig. 4, have two groups of audio-visual sources 70,71,72, with 70a, 71a, 72a is coupled to respectively switch 48.Can select different audio-visual sources 70,71,72 by the control of switch 48, or 70a, 71a, 72a.After the selection, audio-visual source 70,71,72, or 70a, the image that 71a, 72a provide and the processing mode of voice signal are 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 switch (KVM switch) or the KVM stretcher (KVM extender), that is, in KVM switch or KVM stretcher, framework such as Fig. 1 or Fig. 2 is set receives sound and the image that the computer that couples with KVM switch or stretcher provides.Utilization is synthetic with signal of video signal and voice signal, and transmits at 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 different filters by frequency range so that between conveyer and the receiver only need transmit simultaneously TMDS signal of video signal and numeral and/or analoging sound signal and can not produce any interference each other by high-frequency frequency range and low frequency frequency range that single grid line can waltz through in the hybrid differential signal.Therefore, signal transmitting apparatus according to the present invention is except can effectively avoiding the TMDS signal of video signal to be interfered when grid line transmits, and then promote outside the signal transmitting quality of signal transmitting apparatus, other signals are processed or decode element can be transmitted TMDS signal of video signal and numeral and/or analoging sound signal simultaneously because signal transmitting apparatus does not need additionally to arrange, so can effectively save hardware cost and signal processing time, significantly promote the market competitiveness of signal transmitting apparatus.
By the above detailed description of preferred embodiments, hope can be known description feature of the present invention and spirit more, and is not to come category of the present invention is limited with above-mentioned disclosed preferred embodiment.On the contrary, its objective is that hope can contain in the category of claim of being arranged in of various changes and tool equality institute of the present invention wish application.

Claims (28)

1. signal transmitting apparatus comprises at least:
One conveyer, it receives a pair of digital differential signal and single-ended voice signal, this conveyer includes a single-ended/differential wave modular converter and has different one first filtration module and one second filtration modules by frequency range, the output that the input of this second filtration module couples this single-ended/differential wave modular converter and this second filtration module couples the output of this first filtration module, this first filtration module carries out filtering to export a pair of filtering figure differential wave to this to digital differential wave by frequency range according to one first, this single-ended/differential wave modular converter should be converted to the pair of differential voice signal by single-ended voice signal, by frequency range this is carried out filtering exporting the differential voice signal of a pair of filtering to differential voice signal according to one second by this second filtration module again, this to filtering figure differential wave carry in this to filtering on the differential voice signal to synthesize a pair of synthetic differential wave;
The pair of differential transmission line couples this conveyer, should be to synthetic differential wave in order to transmission; And
One receiver, in order to this should be to synthetic differential wave to the differential transmission line reception certainly, this receiver comprises one the 3rd filtration module, one the 4th filtration module and a differential/single-ended signal modular converter, this differential/single-ended signal modular converter couples the output of the 4th filtration module, the 3rd filtration module first carries out filtering to export this to digital differential wave to this to synthetic differential wave by frequency range according to this, the 4th filtration module according to this second by frequency range this is carried out filtering to synthetic differential wave should be to differential voice signal with output, and should be converted to this single-ended voice signal to differential voice signal by this differential/single-ended signal modular converter.
2. conveyer comprises at least:
One first filtration module is in order to carry out filtering to export a pair of filtering figure differential wave according to the one first a pair of digital differential signal of one image source being exported by frequency range;
One single-ended/differential wave modular converter is in order to be converted to the pair of differential voice signal with a single-ended voice signal; And
One second filtration module, its input couples the output that this single-ended/differential wave modular converter and its output couple this first filtration module, this second filtration module carries out filtering to export a pair of 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 to filtering on the differential voice signal to synthesize a pair of synthetic differential wave.
3. receiver comprises:
One receiving terminal, in order to receiving a pair of synthetic differential wave, this is synthesized by a pair of digital differential signal and pair of differential voice signal synthetic differential wave, this to digital differential wave carry in this to differential voice signal on;
One first filtration module is in order to carry out filtering to restore this to digital differential wave to this to synthetic differential wave by frequency range according to one first;
One second filtration module is in order to carry out filtering to restore this to differential voice signal to this to synthetic 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 should differential voice signal being converted to a single-ended voice signal.
4. signal transmitting apparatus comprises at least:
One conveyer comprises:
One first filtration module comprises a plurality of high pass filter unit, in order to that digital differential wave is carried out high-pass filtering is many to high-pass filtering digital differential signal to export to many respectively;
One single-ended/differential wave modular converter is in order to be converted at least one pair of differential voice signal with at least one single-ended voice signal; And
One second filtration module, comprise at least one low-pass filter unit, its input couples the output that this single-ended/differential wave modular converter and its output couple this first filtration module, 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 to this, cause these many at least one pair of high-pass filtering digital differential signal carries to 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 synthetic differential wave;
Many to differential transmission line, couple this conveyer, in order to transmit this at least one pair of synthetic differential wave and not synthetic with the differential voice signal of this at least one pair of low-pass filtering high-pass filtering digital differential signal; And
One receiver comprises:
One the 3rd filtration module, comprise this a plurality of high pass filter unit, in order to respectively to this this at least one pair of synthetic differential wave and to carry out high-pass filtering not many to digital differential wave to restore this with the synthetic high-pass filtering digital differential signal of the differential voice signal of this at least one pair of low-pass filtering;
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 synthetic 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 with this.
5. signal transmitting apparatus as claimed in claim 4, it is characterized in that, in this conveyer, these are many to include a pair of digital clock pulse differential wave and many to digital data differential waves to digital differential wave, these a plurality of high pass filter unit include a clock pulse high pass filter unit and a plurality of data high pass filter unit, this clock pulse high pass filter unit according to a period of time Maitong cross frequency range this carried out high-pass filtering to export a pair of high-pass filtering numeral clock pulse differential wave to digital clock pulse differential wave, these a plurality of data high pass filter unit are crossed frequency range according to a data communication device respectively, and that these many to digital data differential waves are carried out high-pass filtering is many to high-pass filtering numerical data differential wave to export, this at least one single-ended voice signal includes a single-ended digital audio signal, and be converted to the 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 the differential digital voice signal by frequency range according to a digital audio, to export a pair of low-pass filtering differential digital voice signal, so that this to high-pass filtering numeral clock pulse differential wave carry in this to low-pass filtering differential digital voice signal on, to synthesize one first pair of synthetic differential wave.
6. signal transmitting apparatus as claimed in claim 4, it is characterized in that, in this conveyer, these are many to include a pair of digital clock pulse differential wave and many to digital data differential waves to digital differential wave, these a plurality of high pass filter unit include a clock pulse high pass filter unit and a plurality of data high pass filter unit, this clock pulse high pass filter unit according to a period of time Maitong cross frequency range this carried out high-pass filtering to export a pair of high-pass filtering numeral clock pulse differential wave to digital clock pulse differential wave, these a plurality of data high pass filter unit are crossed frequency range according to a data communication device respectively, and that these many to digital data differential waves are carried out high-pass filtering is many to high-pass filtering numerical data differential wave to export, this at least one single-ended voice signal includes two single-ended analoging sound signals, and be converted to two pairs of differential analoging sound 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 the differential analoging sound signal of this two couple according to a simulated sound respectively, to export respectively two pairs of differential analoging sound signals of low-pass filtering, so that this many to the wantonly two pairs of high-pass filtering numerical data differential waves in the high-pass filtering numerical data differential wave respectively carry on these two pairs of differential analoging sound signals of low-pass filtering, to synthesize one second pair of synthetic differential wave and one the 3rd pair of synthetic differential wave.
7. signal transmitting apparatus as claimed in claim 4 is characterized in that, this conveyer further comprises:
One buffer is coupled to this first filtration module, in order to strengthen this many intensity to digital differential wave, exports this first filtration module to again.
8. signal transmitting apparatus as claimed in claim 5, it is characterized in that, in this receiver, these a plurality of high pass filter unit include a clock pulse high pass filter unit and a plurality of data high pass filter unit, this clock pulse high pass filter unit according to a period of time Maitong cross frequency range the synthetic differential wave of this first couple carried out high-pass filtering to export this to digital clock pulse differential wave, these a plurality of data high pass filter unit are crossed frequency range to not carrying out high-pass filtering to export this numerical data differential wave with the synthetic high-pass filtering digital differential signal of the differential voice signal of this at least one pair of low-pass filtering according to a data communication device 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 the synthetic differential wave of this first couple according to a digital audio, to export this to the differential digital voice signal.
9. signal transmitting apparatus as claimed in claim 6, it is characterized in that, in this receiver, these a plurality of high pass filter unit include a plurality of data high pass filter unit, with respectively to this second and the 3rd pair of synthetic differential wave and do not carry out high-pass filtering with the synthetic high-pass filtering digital differential signal of the differential voice signal of this at least one pair of low-pass filtering should many to digital data differential waves with output, 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 the synthetic differential wave of this second couple and the 3rd pair of synthetic differential wave according to a simulated sound respectively, to export respectively the differential analoging sound signal of this two couple.
10. signal transmitting apparatus as claimed in claim 4, it is characterized in that, in this conveyer, corresponding to not being coupled to earth terminal with this high pass filter unit of the synthetic high-pass filtering digital differential signal of the differential voice signal of this at least one pair of low-pass filtering, in receiver, be coupled to earth terminal corresponding to this high pass filter unit that receives not with the synthetic high-pass filtering digital differential signal of the differential voice signal of this at least one pair of low-pass filtering.
11., it is characterized in that this clock pulse comprises frequency range greater than 11MHz by frequency range such as claim 5 or 8 described signal transmitting apparatus, this data communication device is crossed frequency range and comprised frequency range greater than 1.5MHz, this digital audio comprises frequency range less than 9MHz by frequency range.
12., it is characterized in that this clock pulse comprises frequency range greater than 11MHz by frequency range such as claim 6 or 9 described signal transmitting apparatus, this data communication device is crossed frequency range and comprised frequency range greater than 1.5MHz, this simulated sound comprises frequency range less than 530KHz by frequency range.
13. signal transmitting apparatus as claimed in claim 12 is characterized in that, this receiver further comprises:
One compensator is coupled to the 3rd filtration module, in order to compensation these many intensity to digital differential wave by the 3rd filtration module.
14. a conveyer comprises at least:
One first filtration module comprises a plurality of high pass filter unit, in order to that digital differential wave is carried out high-pass filtering is many to high-pass filtering digital differential signal to export to many respectively;
One single-ended/differential wave modular converter is in order to be converted at least one pair of differential voice signal with at least one single-ended voice signal; And
One second filtration module, comprise at least one low-pass filter unit, its input couples the output that this single-ended/differential wave modular converter and its output couple this first filtration module, 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 to this, cause these many at least one pair of high-pass filtering digital differential signal carries to 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 synthetic differential wave.
15. conveyer as claimed in claim 14, it is characterized in that, these are many to include a pair of digital clock pulse differential wave and many to digital data differential waves to digital differential wave, these a plurality of high pass filter unit include a clock pulse high pass filter unit and a plurality of data high pass filter unit, this clock pulse high pass filter unit according to a period of time Maitong cross frequency range this carried out high-pass filtering to export a pair of high-pass filtering numeral clock pulse differential wave to digital clock pulse differential wave, these a plurality of data high pass filter unit are crossed frequency range according to a data communication device respectively, and that these many to digital data differential waves are carried out high-pass filtering is many to high-pass filtering numerical data differential wave to export, this at least one single-ended voice signal includes a single-ended digital audio signal, and be converted to the 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 the differential digital voice signal by frequency range according to a digital audio, to export a pair of low-pass filtering differential digital voice signal, this to high-pass filtering numeral clock pulse differential wave carry in this to low-pass filtering differential digital voice signal on, to synthesize one first pair of synthetic differential wave.
16. conveyer as claimed in claim 15, it is characterized in that, in this conveyer, these are many to include a pair of digital clock pulse differential wave and many to digital data differential waves to digital differential wave, these a plurality of high pass filter unit include a clock pulse high pass filter unit and a plurality of data high pass filter unit, this clock pulse high pass filter unit according to a period of time Maitong cross frequency range this carried out high-pass filtering to export a pair of high-pass filtering numeral clock pulse differential wave to digital clock pulse differential wave, these a plurality of data high pass filter unit are crossed frequency range according to a data communication device respectively, and that these many to digital data differential waves are carried out high-pass filtering is many to high-pass filtering numerical data differential wave to export, this at least one single-ended voice signal includes two single-ended analoging sound signals, and be converted to two pairs of differential analoging sound 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 the differential analoging sound signal of this two couple according to a simulated sound respectively, to export respectively two pairs of differential analoging sound signals of low-pass filtering, this many to the wantonly two pairs of high-pass filtering numerical data differential waves in the high-pass filtering numerical data differential wave respectively carry on these two pairs of differential analoging sound signals of low-pass filtering, to synthesize one second pair of synthetic differential wave and one the 3rd pair of synthetic differential wave.
17. conveyer as claimed in claim 15 is characterized in that, corresponding to not being coupled to earth terminal with this high pass filter unit of the synthetic high-pass filtering digital differential signal of the differential voice signal of this at least one pair of low-pass filtering.
18. conveyer as claimed in claim 15 is characterized in that, this clock pulse comprises frequency range greater than 11MHz by frequency range, and this data communication device is crossed frequency range and comprised frequency range greater than 1.5MHz, and this digital audio comprises frequency range less than 9MHz by frequency range.
19. conveyer as claimed in claim 16 is characterized in that, this clock pulse comprises frequency range greater than 11MHz by frequency range, and this data communication device is crossed frequency range and comprised frequency range greater than 1.5MHz, and this simulated sound comprises frequency range less than 530KHz by frequency range.
20. conveyer as claimed in claim 14 is characterized in that, further comprises:
One buffer is coupled to this first filtration module, in order to strengthen this many intensity to digital differential wave, exports this first filtration module to again.
21. conveyer as claimed in claim 14, it is characterized in that, it more includes a switch, its with this first filtration module and this single-ended/the differential wave modular converter couples mutually, this switch more couples mutually with many groups AV signal source, each group AV signal source provides these many to digital differential wave and this at least one pair of differential voice signal, this switch by switching controls with by choosing wherein one group of AV signal source in many groups AV signal source, with this is selected AV signal source provided this many to digital differential wave and this at least one pair of differential transmission of sound signals to this first filtration module and this single-ended/the differential wave modular converter.
22. a receiver comprises:
One receiving terminal, in order to receive at least one pair of synthetic differential wave and at least one pair of high-pass filtering digital differential signal, each is synthesized by pair of differential voice signal and a pair of digital differential signal synthetic differential wave, wherein this to digital differential wave carry in this to differential voice signal on;
One first filtration module comprises a plurality of high pass filter unit, in order to respectively to this at least one pair of synthetic differential wave and this at least one pair of high-pass filtering digital differential signal to carry out high-pass filtering many to digital differential wave to restore;
One second filtration module comprises at least one low-pass filter unit, in order to this at least one pair of synthetic 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 single-ended voice signal with this.
23. receiver as claimed in claim 22, it is characterized in that, this at least one pair of synthetic differential wave comprises one first pair of synthetic differential wave, the synthetic differential wave of this first couple is synthesized by pair of differential digital audio signal and a pair of digital clock pulse differential wave, these a plurality of high pass filter unit include a clock pulse high pass filter unit and at least one data high pass filter unit, this clock pulse high pass filter unit according to a period of time Maitong cross frequency range the synthetic differential wave of this first couple carried out high-pass filtering to export this to digital clock pulse differential wave, this at least one data high pass filter unit is crossed frequency range according to a data communication device respectively this at least one high-pass filtering digital differential signal is carried out high-pass filtering to export this numerical data differential wave, 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 the synthetic differential wave of this first couple according to a digital audio, to export this to the differential digital voice signal.
24. receiver as claimed in claim 22, it is characterized in that, this at least one pair of synthetic differential wave comprises one second pair of synthetic differential wave and one the 3rd pair of synthetic differential wave, the synthetic differential wave of this second couple and the 3rd pair of synthetic differential wave respectively by pair of differential analoging sound signal and to digital data differential wave synthesized, this at least one high pass filter unit includes a plurality of data high pass filter unit, these a plurality of data high pass filter unit are crossed frequency range to second pair of synthetic differential wave according to a data communication device respectively, the 3rd pair of synthetic differential wave and this at least one pair of high-pass filtering digital differential signal carry out high-pass filtering to export many to digital data differential waves, 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 the synthetic differential wave of this second couple and the 3rd pair of synthetic differential wave according to a simulated sound respectively, to export respectively the differential analoging sound signal of this two couple.
25. receiver as claimed in claim 22 is characterized in that, corresponding to not being coupled to earth terminal with this high pass filter unit of the synthetic high-pass filtering digital differential signal of the differential voice signal of this at least one pair of low-pass filtering.
26. receiver as claimed in claim 23 is characterized in that, this clock pulse comprises frequency range greater than 11MHz by frequency range, and this data communication device is crossed frequency range and comprised frequency range greater than 1.5MHz, and this digital audio comprises frequency range less than 9MHz by frequency range.
27. receiver as claimed in claim 24 is characterized in that, this clock pulse comprises frequency range greater than 11MHz by frequency range, and this data communication device is crossed frequency range and comprised frequency range greater than 1.5MHz, and this simulated sound comprises frequency range less than 530KHz by frequency range.
28. receiver as claimed in claim 22 is characterized in that, further comprises:
One compensator is coupled to this second filtration module, in order to compensation these many intensity to digital differential wave by this second filtration module.
CN201110253958.8A 2011-06-27 2011-08-24 Signal transmission device and transmitter and receiver thereof Active CN102857754B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW100122483A TWI499302B (en) 2011-06-27 2011-06-27 Signal transmitting apparatus and transmitter and receiver thereof
TW100122483 2011-06-27

Publications (2)

Publication Number Publication Date
CN102857754A true CN102857754A (en) 2013-01-02
CN102857754B CN102857754B (en) 2015-09-09

Family

ID=47403897

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201110253958.8A Active CN102857754B (en) 2011-06-27 2011-08-24 Signal transmission device and transmitter and receiver thereof

Country Status (2)

Country Link
CN (1) CN102857754B (en)
TW (1) TWI499302B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN106534813A (en) * 2015-09-10 2017-03-22 宏正自动科技股份有限公司 Multimedia signal transmission device and method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI578126B (en) * 2015-10-13 2017-04-11 大量科技股份有限公司 Signal transmission apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020071662A1 (en) * 1996-10-15 2002-06-13 Matsushita Electric Industrial Co., Ltd. Video and audio coding method, coding apparatus, and coding program recording medium
CN101170658A (en) * 2006-10-25 2008-04-30 晨星半导体股份有限公司 Television tuner

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2006040869A1 (en) * 2004-10-14 2008-05-15 松下電器産業株式会社 Filter circuit, and differential transmission system and power supply device including the same
WO2010068915A2 (en) * 2008-12-11 2010-06-17 Synerchip Co., Ltd. Power delivery over digital interaction interface for video and audio (diiva)

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020071662A1 (en) * 1996-10-15 2002-06-13 Matsushita Electric Industrial Co., Ltd. Video and audio coding method, coding apparatus, and coding program recording medium
CN101170658A (en) * 2006-10-25 2008-04-30 晨星半导体股份有限公司 Television tuner

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US10452591B2 (en) 2015-07-10 2019-10-22 Hytera Communications Corporation Limited Circuit for inhibiting single-ended analogue signal noise, and terminal attachment
CN106534813A (en) * 2015-09-10 2017-03-22 宏正自动科技股份有限公司 Multimedia signal transmission device and method
CN106534813B (en) * 2015-09-10 2019-12-20 宏正自动科技股份有限公司 Multimedia signal transmission device and method

Also Published As

Publication number Publication date
TWI499302B (en) 2015-09-01
CN102857754B (en) 2015-09-09
TW201301890A (en) 2013-01-01

Similar Documents

Publication Publication Date Title
CN101426120B (en) Method for expanding HDMI and/or DVI interface by single Ethernet cable for long distance connection
CN201608820U (en) Audio/video control system for large-scale LED display screen
CN102684724B (en) Signal transmission device and transmitter and receiver thereof
CN104125434A (en) Long-distance high-definition transmission system
WO2014205992A1 (en) Multi-terminal synchronous display method, display apparatus, and display apparatus cascading system
CN104135643B (en) A kind of method and apparatus of long range high definition transmission
CN101102487A (en) Video transmission system and method based on VGA and HDMI display mode
CN101729790B (en) Matrix multi-computer switch system and signal extender system
CN102857754B (en) Signal transmission device and transmitter and receiver thereof
TWI419545B (en) Transmitter, receiver and extender system
CN101489075B (en) Display signal extending apparatus and method for transmitting display signal therefor
CN111163344A (en) Long-distance double-screen interactive entertainment information processing system
CN100342715C (en) High-definition multimedia interface branch apparatus
CN101572823A (en) Video signal self-adaptive input interface and monitor and multi-picture display device using the same
CN2859953Y (en) Multifunctional digital TV with intellectual interface
CN101710259A (en) Computer bidirectional simulated audio transmission method based on KVM
CN101212583A (en) Decoding circuit in integrated analog/digital TV receiver
CN202872962U (en) Video-audio signal transmission system and transmission device thereof
CN210629677U (en) Ultra-high definition HDMI audio/video network cable extender
CN202364224U (en) Four-core optical fiber HDMI optical transceiver
CN203313333U (en) Digital television receiver compatible with multiple data connection interfaces
CN202652410U (en) Video signal long-distance transmission apparatus
US20110051818A1 (en) Power line transmission apparatus without public power system noise interference and method thereof
CN201332483Y (en) System capable of achieving connection between computer and television through TV box and PC box
CN102035572B (en) Power line transmission method and device as well as household network system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant