CN102905115A - Vehicular multimedia system and monitoring system - Google Patents
Vehicular multimedia system and monitoring system Download PDFInfo
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- CN102905115A CN102905115A CN2012104020950A CN201210402095A CN102905115A CN 102905115 A CN102905115 A CN 102905115A CN 2012104020950 A CN2012104020950 A CN 2012104020950A CN 201210402095 A CN201210402095 A CN 201210402095A CN 102905115 A CN102905115 A CN 102905115A
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Abstract
The invention discloses a vehicular multimedia system and a monitoring system. The vehicular multimedia system comprises video/audio capturing equipment, a transmission line and a video/audio playing device, wherein the video/audio capturing equipment comprises a video capturing element, a first radio-frequency (RF) module and a first connection circuit; the video/audio playing device comprises a second connection circuit, a second RF module and a display; both the first connection circuit and the second connection circuit are provided with inductors and capacitors; and the video/audio capturing equipment transmits RF video signals and power signals to the video/audio playing device through the transmission line, so that the display can display videos captured by the video capturing element.
Description
Technical field
The present invention relates to a kind of motor multimedia system and surveillance, particularly a kind of motor multimedia system and surveillance of using power line communication.
Background technology
Along with the pay attention to day by day of society to traffic safety, camera monitoring is provided in becomes a kind of effective means that improves security protection in the driving safety system.This technology be in vehicle, install camera come to arround environment photograph, can reduce visual dead angle to assist to be driven in when driving, and then reduce the generation of traffic accident.Particularly, when the driver in reversing, when stopping, if can use radar for backing car collocation reversing photography auxiliary system, just can make the driver in reversing, when stopping, differentiate exactly car rear space, position and direction, the fail safe that lifting stops/moves backward.
Yet, existing wired reversing camera will send the picture of photographing to the display in the car, must transmit signal of video signal by the transmission lines that increase between reversing camera and display, not only installation is difficult for, and also can produce considerable inconvenience and restriction more.For instance, if the driver wishes that diverse location is installed video camera in vehicle, then each video camera all must directly carry out wiring with display respectively, complicated, the expansion difficulty that causes connecting up, and have inaesthetic problem.
The technology of transmitting wirelessly between another kind of video camera and the display then must be considered the impact that the signal stabilization degree brings.If two contiguous vehicles all carry out wireless transmission with same frequency, then may have the problem that interferes with each other.
Summary of the invention
In view of this, the invention provides a kind of motor multimedia system and surveillance, utilize that power line communication reaches that wiring is simple, signal stabilization and attractive in appearance on requirement.
The present invention proposes a kind of motor multimedia system, is disposed at car body.The motor multimedia system comprises one or more audio-visual capture device, transmission line and one or more video-audio playing device.Wherein, each audio-visual capture device comprises the first image capture element, the first radio-frequency module and the first connecting circuit.The first image capture element is in order to pick-up image and produce signal of video signal.The first radio-frequency module is electrically connected the first image capture element, is the high frequency signal of video signal in order to modulate signal of video signal.The first connecting circuit is electrically connected the first radio-frequency module, and the first connecting circuit has electric capacity and inductance, in order to export the high frequency signal of video signal to transmission line.Transmission line is in order to receiving the high frequency signal of video signal from the first connecting circuit, and high frequency signal of video signal and electric power signal are sent to one or more video-audio playing device in the lump.Video-audio playing device comprises the second connecting circuit, the second radio-frequency module and display.The second connecting circuit has electric capacity and inductance, in order to receive the high frequency signal of video signal from transmission line.The second radio-frequency module is electrically connected the second connecting circuit, in order to the high frequency signal of video signal is demodulated into the low frequency signal of video signal.Display is in order to receive the image of low frequency signal of video signal to show that audio-visual capture device is captured.
In one embodiment of this invention, described transmission line is electrically connected to the storage battery of car body.
In one embodiment of this invention, described the first connecting circuit is electrically connected to the first socket of car body and is electrically connected to storage battery via transmission line.Described the second connecting circuit is electrically connected to the second socket of car body and is electrically connected to storage battery via transmission line.
In one embodiment of this invention, described the first socket is cigarette lighter socket, and described the second socket is the bulb power line.
In one embodiment of this invention, described storage battery has positive terminal and negative electricity end, and first and second connecting circuit is electrically connected to respectively positive terminal and the negative electricity end of storage battery via transmission line.
In one embodiment of this invention, described storage battery has positive terminal and earth terminal, and first and second connecting circuit is electrically connected to respectively the positive terminal of storage battery via transmission line.Wherein the earth terminal of storage battery is electrically connected to the shell of car body.
In one embodiment of this invention, the electric capacity in described the first connecting circuit and inductance are electrically connected, and the electric capacity in described the second connecting circuit and inductance are electrically connected.
In one embodiment of this invention, wherein the number when audio-visual capture device is N, the display of video-audio playing device also is divided into a display frame N block, and wherein N block correspondence shows N the image that N audio-visual capture device captures, and N is the positive integer greater than 1.
The present invention proposes a kind of motor multimedia system in addition, is disposed at a car body.The motor multimedia system comprises one or more image capture element, one or more display and transmission line.Wherein, each image capture element is in order to pick-up image and generation signal of video signal.Display is in order to show image.Transmission line has at least two ends, and an end of transmission line has the first radio-frequency module and the first connecting circuit, and the other end of transmission line has the second radio-frequency module and the second connecting circuit.Wherein, the first radio-frequency module is electrically connected the image capture element, and the second radio-frequency module is electrically connected display.Signal of video signal and electric power signal are sent to display via transmission line simultaneously.
The present invention proposes again a kind of surveillance, and it comprises one or more audio-visual capture device, power line and one or more video-audio playing device.Wherein, each audio-visual capture device comprises image capture element, the first radio-frequency module and the first connecting circuit.The image capture element is in order to pick-up image and produce signal of video signal.The first radio-frequency module is electrically connected the image capture element, is the high frequency signal of video signal in order to modulate signal of video signal.The first connecting circuit is electrically connected the first radio-frequency module.The first connecting circuit has electric capacity and inductance, in order to export the high frequency signal of video signal to power line.Power line is electrically connected the first connecting circuit, in order to receive the high frequency signal of video signal and the high frequency signal of video signal is sent to video-audio playing device.Each video-audio playing device comprises the second connecting circuit, the second radio-frequency module and display.The second connecting circuit has electric capacity and inductance, in order to be electrically connected power line, to receive the high frequency signal of video signal from power line.The second radio-frequency module is electrically connected the second connecting circuit, in order to the high frequency signal of video signal is demodulated into the low frequency signal of video signal.Display receives the low frequency signal of video signal with show image.
Based on above-mentioned, motor multimedia system provided by the present invention and surveillance are utilized power line simultaneously the transmission of data (radio frequency signal of video signal) and electric power, reach that wiring is simple, the signal stabilization degree and attractive in appearance on requirement.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate appended graphic being described in detail below.
Description of drawings
Fig. 1 is the circuit diagram of a kind of motor multimedia system that illustrates according to one embodiment of the invention;
Fig. 2 is the circuit diagram of a kind of motor multimedia system that illustrates according to another embodiment of the present invention;
Fig. 3 is the circuit diagram of a kind of motor multimedia system that illustrates according to further embodiment of this invention;
Fig. 4 is the circuit diagram of a kind of surveillance of illustrating according to yet another embodiment of the invention.
[main element symbol description]
100,200,300: the motor multimedia system
110,120-1,120-2,120-N: audio-visual capture device
112,432: the image capture element
114: the first radio-frequency modules
116: the first connecting circuits
118,138: power-supply unit
120,420: transmission line
130: video-audio playing device
132,412: display
134: the second radio-frequency modules
136: the second connecting circuits
310,320: signal processing unit
400: surveillance
410: the first AV devices
430: the second AV devices
C: electric capacity
L: inductance
A, B, C1, C2, CN, D, E: end points
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in further detail.
Fig. 1 is the circuit diagram of a kind of motor multimedia system that illustrates according to one embodiment of the invention.Please refer to Fig. 1, in the present embodiment, motor multimedia system 100 comprises audio-visual capture device 110, transmission line 120 and video-audio playing device 130.Below respectively each member is explained orally in detail:
Audio-visual capture device 110 for example is the device of video camera or other capable of capturing images and/or sound.Audio-visual capture device 110 comprises image capture element 112, the first radio-frequency module 114, the first connecting circuit 116 and power-supply unit 118.Image capture element 112 can adopt charge coupled cell (Charge Coupled Device Camera, CCD) or the phtographic lens such as CMOS (Complementary Metal Oxide Semiconductor) (Complementary Metal-Oxide Semiconductor, CMOS) realize.Image capture element 112 is in order to being signal of video signal with captured video conversion, and sends this signal of video signal to first radio-frequency module 114.What must illustrate is that the number of image capture element 112 is not limited to one.In another embodiment, audio-visual capture device 110 for example can have the first image capture element and the second image capture element simultaneously, and the first image capture element is in order to capture the first image, and the second image capture element is in order to capture the second image.The first image and the second image all are sent to the first radio-frequency module 114.That is to say that audio-visual capture device 110 has two phtographic lenses, so that motor multimedia system 100 can be used as the usefulness of drive recorder.
The first radio-frequency module (Radio frequency module, RF module) 114 is electrically connected to image capture element 112, in order to signal of video signal is modulated to the high frequency signal of video signal.Wherein, the technology of modulation is that this area tool general knowledge person all knows, does not encyclopaedize at this.The frequency of high frequency signal of video signal for example is 2.4G, 5G, 8G etc., and the setting of its frequency can be done setting according to the actual application environment demand by this area tool general knowledge person, is not limited at this.
The first connecting circuit 116 is electrically connected to the first radio-frequency module 114, the first connecting circuits 116 and has capacitor C and the inductance L of electric connection, in order to export the high frequency signal of video signal to transmission line 120.The high frequency signal of video signal of present embodiment is not to transmit wirelessly by antenna transmission, but transmits in the mode of power line communication.In detail, the high frequency signal of video signal is the medium by the first connecting circuit 116, and can transmit in wired mode on transmission line 120.Capacitor C has the effect of the direct current of obstruct; Inductance L has the obstruct alternating current function, is back to power-supply unit 118 in order to avoid the high frequency signal of video signal, and can smoothly the high frequency signal of video signal be sent to video-audio playing device 134 by transmission line 120.In addition, the first connecting circuit 116 is corresponding to the frequency of high frequency signal of video signal, and adjustable capacitance C and inductance L produce corresponding capacitance and inductance value.
Video-audio playing device 130 comprises the second connecting circuit 136, the second radio-frequency module 134, display 132 and power-supply unit 138.The second connecting circuit has capacitor C and inductance L, in order to receive the high frequency signal of video signal from transmission line 120.The second radio-frequency module 134 is electrically connected the second connecting circuit 136, in order to this high frequency signal of video signal is carried out demodulation, to be converted to the low frequency signal of video signal.Via after the demodulation the low frequency signal of video signal then can play at display 132.Display 132 for example is liquid crystal display (Liquid Crystal Display, LCD), light-emitting diode (Light-Emitting Diode, LED) display etc., is not limited to above-mentioned.
Based on above-mentioned, the motor multimedia system 100 of present embodiment transmits signal of video signal and electric power signal in the lump by transmission line 120, so that use existing power line can transmit signal of video signal between audio-visual capture device 110 and the video-audio playing device 130, must additionally not connect up again, therefore can reduce the trouble that motor multimedia system 100 installs in vehicle.
Fig. 2 is the circuit diagram of a kind of motor multimedia system that illustrates according to another embodiment of the present invention.Please refer to Fig. 2, in the present embodiment, motor multimedia system 200 comprise N image capturing device 210-1,210-2 ..., 210-N, transmission line 120 and an image player 130.Wherein N is the positive integer greater than 1.Each image capturing device 210-1,210-2 ..., 210-N has identical structure with image capturing device 110 shown in Figure 1, do not repeat them here.Transmission line 120 directly/indirectly be electrically connected to storage battery and can receive the power line of storage battery supply capability.
Audio-visual capture device can be installed by the diverse location in car body by the motor multimedia system 200 of present embodiment.For convenient follow-up explanation, suppose that the motor multimedia system 200 of present embodiment has 3 image capturing devices, namely N equals 3.
For instance, audio-visual capture device 210-1 for example can be installed in the car body rear.In one embodiment, the connection end point C1 between audio-visual capture device 210-1 and the transmission line 120 for example is the power line of car light after directly being electrically connected by audio-visual capture device 210-1; In another embodiment, the connection end point C1 between audio-visual capture device 210-1 and the transmission line 120 for example is the power line that directly is electrically connected radar for backing car by audio-visual capture device 210-1.
Wherein, the power line of rear car light or radar for backing car is from storage battery, therefore, if storage battery has positive terminal and negative electricity end, 116 positive terminal and negative electricity ends that indirectly are electrically connected to storage battery via the power line of rear car light or radar for backing car of the first connecting circuit of audio-visual capture device 210-1 then.If storage battery has positive terminal and earth terminal, 116 positive terminal that indirectly are electrically connected to storage battery via the power line of rear car light or radar for backing car of the first connecting circuit of audio-visual capture device 210-1 then.The earth terminal of storage battery then is electrically connected to the shell of car body.
Again for example, the audio-visual capture device 210-2 of motor multimedia system 200 for example can be installed in the left back of car body and looks in the mirror.If left back the looking in the mirror of car body has blinker, then the connection end point C2 between audio-visual capture device 210-2 and the transmission line 120 for example is the power line that directly is electrically connected blinker by audio-visual capture device 210-2.Similarly, the audio-visual capture device 210-3 of motor multimedia system 200 for example can be installed in the right back of car body and looks in the mirror.If right back the looking in the mirror of car body has blinker, then the connection end point C3 between audio-visual capture device 210-3 and the transmission line 120 for example is the power line that directly is electrically connected blinker by audio-visual capture device 210-3.Thus, audio-visual capture device 210-1,210-2 and 210-3 all can be connected to transmission line 120 via the power line of contiguous electrical installation respectively.
And audio-visual capture device 210-1,210-2 and 210-3 to arround the image that captures taken of environment be to watch in order to offer the driver, can reduce visual dead angle to assist to be driven in when driving.Therefore, video-audio playing device 130 is installed on the position that the driver watches easily usually.And the connection end point B between video-audio playing device 130 and the transmission line 120 for example is cigarette lighter socket.That is to say that the second connecting circuit 136 of video-audio playing device 130 is directly to be electrically connected to cigarette lighter socket, accepts the electric power that storage battery provides by cigarette lighter socket.
Simultaneously, the second connecting circuit 136 of video-audio playing device 130 also receives the high frequency signal of video signal that transmits from audio-visual capture device 210-1,210-2 and 210-3 by cigarette lighter socket.The high frequency signal of video signal carries out via the second radio-frequency module 134 can being sent to display 132 and playing after the demodulation.Must explanation be that display 132 can be divided into display frame N block, wherein N block image of capturing of the individual audio-visual capture device of corresponding demonstration N respectively.For instance, in the present embodiment, display 132 for example can be divided into display frame 3 blocks, and the 1st block shows the image frame that audio-visual capture device 210-1 captures; The 2nd block shows the image frame that audio-visual capture device 210-2 captures; And the 3rd block shows the image frame that audio-visual capture device 210-3 captures.Thus, the driver just can watch the context picture from different visual angles easily rapidly, can make the driver in reversing, when stopping, and differentiates exactly car rear space, position and direction, promotes the fail safe that stops/move backward.
It is noted that although the motor multimedia system 200 of present embodiment only has 1 video-audio playing device, the present invention is not as limit, the motor multimedia system can comprise most video-audio playing devices.In other words, the collocation of audio-visual capture device and video-audio playing device can have multiple pattern.For example, video-audio playing device of an audio-visual capture device collocation; Video-audio playing device of a plurality of audio-visual capture device collocation; Perhaps, a plurality of audio-visual capture devices a plurality of video-audio playing devices of arranging in pairs or groups.No matter which kind of pattern it is, transmission line between audio-visual capture device and the video-audio playing device uses power line communication, and the user is not limited at this when visual actual needs arrange in pairs or groups voluntarily number and the installation position thereof of audio-visual capture device and video-audio playing device.
Illustrate as example for an embodiment again with next.
Fig. 3 is the circuit diagram of a kind of motor multimedia system that illustrates according to further embodiment of this invention.Please refer to Fig. 3, motor multimedia system 300 comprises image capture element 112, first signal processing unit 310, transmission line 120, secondary signal processing unit 320 and display 132.Wherein, first signal processing unit 3 10 comprises the first radio-frequency module 114, the first connecting circuit 116 and power-supply unit 118.Secondary signal processing unit 320 comprises the second radio-frequency module 134, the second connecting circuit 136 and power-supply unit 138.
Present embodiment is continued to use Reference numeral and the partial content of the element of previous embodiment, wherein adopts identical Reference numeral to represent identical or approximate element, and omits the explanation of constructed content, can be with reference to previous embodiment about the explanation of clipped.
The camera monitoring that the various embodiments described above are applied to vehicle is equipped with, yet in other Application Example, the audio-visual capture device of above-described embodiment and video-audio playing device also can be arranged at such as the outfit of the camera monitoring in the home environment or as the usefulness of intercom.In home environment, audio-visual capture device and video-audio playing device can be connected to power line by supply socket respectively, transmit simultaneously signal of video signal and electric power signal by power line.
Fig. 4 is the circuit diagram of a kind of surveillance of illustrating according to yet another embodiment of the invention.Please refer to Fig. 4, surveillance 400 comprises the first AV device 410, transmission line 420 and the second AV device 430.The first AV device 410 also comprises display 412 except comprising image capture element 112, the first radio-frequency module 114, the first connecting circuit 116 and power-supply unit 118.The second AV device 430 has identical with the first AV device 410 or similarly constructs and function.That is to say that the first AV device 410 and the second AV device 430 all have the function of image capture and image broadcast.
The transmission line 420 of present embodiment for example is homeplug powerline, and can carry out transmitted in both directions between the first AV device 410 and the second AV device 430.If the image capture element 112 of the first AV device 410 in order to pick-up image, then can be play by the display 132 of transmission line 420 transmission high frequency signal of video signal to the second AV devices 430.If the image capture element 432 of the second AV device 430 in order to pick-up image, then can be play by the display 412 of transmission line 420 transmission high frequency signal of video signal to the first AV devices 410.Therefore, the surveillance 400 of present embodiment for example can be used as the usefulness of Bidirectional interphone.
In one embodiment, two ends D, the E of transmission line 420 for example can be connected to the first AV device 410 and the second AV device 430 by household outlet respectively after suitable voltage is processed.In another embodiment, the first AV device 410 and the second AV device 430 also optionally are electrically connected to charging device, receive high frequency signal of video signal and the electric power signal that transmission line 420 transmits via charging device.
In sum, the present invention utilizes power line simultaneously the transmission of data (radiofrequency signal) and electric power, do not transmit separately data so that must additionally not increase transmission line between audio-visual capture device and the video-audio playing device, reduce trouble that audio-visual capture device installs and numerous and diverse wires design.In addition, may be subject to the problem that context disturbs compared to wireless transmission, the present invention is transmitted in wired mode, can effectively guarantee signal stabilization degree and the quality of image.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; be understood that; the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (24)
1. a motor multimedia system is disposed at a car body, comprising:
At least one audio-visual capture device comprises:
One first image capture element is used for acquisition one image and produces a signal of video signal;
One first radio-frequency module is electrically connected this first image capture element, and being used for this signal of video signal of modulation is a high frequency signal of video signal; And
One first connecting circuit is electrically connected this first radio-frequency module, has an electric capacity and an inductance, is used for exporting this high frequency signal of video signal to a transmission line;
One transmission line is used for receiving this high frequency signal of video signal from this first connecting circuit, and this high frequency signal of video signal and an electric power signal is sent at least one video-audio playing device in the lump; And
At least one video-audio playing device comprises:
One second connecting circuit has an electric capacity and an inductance, is used for receiving this high frequency signal of video signal from this transmission line;
One second radio-frequency module is electrically connected this second connecting circuit, and being used for this high frequency signal of video signal of modulation is a low frequency signal of video signal; And
One display is used for receiving this low frequency signal of video signal to show this image.
2. motor multimedia as claimed in claim 1 system, wherein this transmission line is electrically connected to a storage battery of this car body.
3. motor multimedia as claimed in claim 2 system, wherein this first connecting circuit also comprises one first socket that is electrically connected to this car body and is electrically connected to this storage battery via this transmission line, and this second connecting circuit also comprises one second socket that is electrically connected to this car body and is electrically connected to this storage battery via this transmission line.
4. motor multimedia as claimed in claim 3 system, wherein this first socket is cigarette lighter socket, wherein this second socket is a bulb power line.
5. motor multimedia as claimed in claim 2 system, wherein this storage battery has a positive terminal and a negative electricity end, this first, this second connecting circuit is electrically connected to respectively this positive terminal and this negative electricity end of this storage battery via this transmission line.
6. motor multimedia as claimed in claim 2 system, wherein this storage battery has a positive terminal and an earth terminal, this first, this second connecting circuit is electrically connected to respectively this positive terminal of this storage battery via this transmission line, wherein this earth terminal of this storage battery is electrically connected to the shell of this car body.
7. motor multimedia as claimed in claim 1 system, wherein this electric capacity in this first connecting circuit and this inductance are electrically connected, this electric capacity in this second connecting circuit and the electric connection of this inductance.
8. motor multimedia as claimed in claim 1 system, wherein:
When the number of this audio-visual capture device is N, this display of this video-audio playing device also is divided into a display frame N block, N N image that the individual audio-visual capture device of the corresponding demonstration of block N captures wherein, and N is the positive integer greater than 1.
9. motor multimedia as claimed in claim 1 system, wherein this at least one audio-visual capture device also comprises:
One second image capture element is electrically connected this first radio-frequency module, captures one second image and produces one second signal of video signal to this first radio-frequency module.
10. a motor multimedia system is disposed at a car body, comprising:
At least one image capture element is used for acquisition one image and produces a signal of video signal;
At least one display is used for showing this image; And
One transmission line, one end of this transmission line has one first radio-frequency module and one first connecting circuit, the other end of this transmission line has one second radio-frequency module and one second connecting circuit, wherein this first radio-frequency module is electrically connected this image capture element, this second radio-frequency module is electrically connected this display
Wherein this signal of video signal and an electric power signal are sent to this display via this transmission line.
11. motor multimedia as claimed in claim 10 system, wherein this first connecting circuit and this second connecting circuit comprise respectively an electric capacity and an inductance.
12. motor multimedia as claimed in claim 11 system, wherein this electric capacity in this first connecting circuit and this inductance are electrically connected, this electric capacity in this second connecting circuit and the electric connection of this inductance.
13. motor multimedia as claimed in claim 10 system, wherein this transmission line is electrically connected to a storage battery of this car body.
14. motor multimedia as claimed in claim 13 system, wherein this first connecting circuit also comprises one first socket that is electrically connected to this car body, to be electrically connected to this storage battery, this second connecting circuit also comprises one second socket that is electrically connected to this car body, to be electrically connected to this storage battery.
15. motor multimedia as claimed in claim 14 system, wherein this first socket is cigarette lighter socket, and wherein this second socket is a bulb power line.
16. motor multimedia as claimed in claim 13 system, wherein this storage battery has a positive terminal and a negative electricity end, and this image capture element and this display are electrically connected to respectively this positive terminal and this negative electricity end of this storage battery via this transmission line.
17. motor multimedia as claimed in claim 13 system, wherein this storage battery has a positive terminal and an earth terminal, this image capture element and this display are electrically connected to respectively this positive terminal of this storage battery via this transmission line, wherein this earth terminal of this storage battery is electrically connected to the shell of this car body.
18. motor multimedia as claimed in claim 10 system, wherein:
When the number of this image capture element is N, this display also is divided into a display frame N block, N N image that the image capture element captures of N block correspondence demonstration wherein, and N is the positive integer greater than 1.
19. a surveillance comprises:
At least one audio-visual capture device comprises:
One image capture element is used for acquisition one image and produces a signal of video signal;
One first radio-frequency module is electrically connected this image capture element, and being used for this signal of video signal of modulation is a high frequency signal of video signal; And
One first connecting circuit is electrically connected this first radio-frequency module, has an electric capacity and an inductance, is used for exporting this high frequency signal of video signal to a power line;
One power line is electrically connected this first connecting circuit, is used for receiving this high frequency signal of video signal and this high frequency signal of video signal being sent to a video-audio playing device; And
At least one video-audio playing device comprises:
One second connecting circuit has an electric capacity and an inductance, is electrically connected this power line to receive this high frequency signal of video signal from this power line;
One second radio-frequency module is electrically connected this second connecting circuit, and being used for this high frequency signal of video signal of modulation is a low frequency signal of video signal; And
One display is used for receiving this low frequency signal of video signal to show this image.
20. surveillance as claimed in claim 19 wherein transmits this high frequency signal of video signal and an electric power signal via this power line between this audio-visual capture device and this video-audio playing device.
21. surveillance as claimed in claim 19, wherein this electric capacity in this first connecting circuit and this inductance are electrically connected, and this electric capacity in this second connecting circuit and this inductance are electrically connected.
22. surveillance as claimed in claim 19, wherein:
This video-audio playing device also comprises and is electrically connected to a charging device, receives this high frequency signal of video signal and this electric power signal that this power line transmits via this charging device.
23. surveillance as claimed in claim 19, wherein:
When the number of this audio-visual capture device is N, this display of this video-audio playing device also is divided into a display frame N block, N N image that the individual audio-visual capture device of the corresponding demonstration of block N captures wherein, and wherein N is the positive integer greater than 1.
24. surveillance as claimed in claim 19, wherein this audio-visual capture device also comprises a display, and this video-audio playing device also comprises an image capture element, wherein passes through this high frequency signal of video signal of this power line transmitted in both directions between this audio-visual capture device and this video-audio playing device.
Priority Applications (1)
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|---|---|---|---|
| CN2012104020950A CN102905115A (en) | 2012-10-22 | 2012-10-22 | Vehicular multimedia system and monitoring system |
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| CN2012104020950A CN102905115A (en) | 2012-10-22 | 2012-10-22 | Vehicular multimedia system and monitoring system |
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| CN102905115A true CN102905115A (en) | 2013-01-30 |
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Application publication date: 20130130 |