CN101686369B - Novel wireless video doorphone system - Google Patents
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Abstract
The invention relates to a novel wireless video doorphone system comprising an indoor unit and an outdoor unit, wherein the indoor unit comprises a first control key, a first singlechip for processing control signals, a first microphone, a first loudspeaker, a first voice chip, a first complex programmable logic device (CPLD) and a first wireless digital transmission module; the outdoor unit comprises a second control key, a second singlechip for processing control signals, a second microphone, a second loudspeaker, a second voice chip, a second complex programmable logic device (CPLD) and a second wireless digital transmission module; the outdoor unit also comprises a camera for acquiring video signals and a radiofrequency emitting module for emitting video signals, wherein the camera is connected with the video input end of the radiofrequency emitting module; the indoor unit also comprises a radiofrequency receiving module and a display screen, wherein the radiofrequency receiving module is matched with the radiofrequency emitting module, and the video output end of the radiofrequency receiving module is connected with the display screen. The invention adopts a hybrid analog-digital technology and has video function and good instantaneity.
Description
Technical field
The present invention relates to the radio multimedium technology, especially a kind of wireless visible intercom system.
Background technology
In recent years, along with the development of fast wireless network communication, simultaneously also because the intrinsic advantage of radio communication (as set up flexible, be suitable for moving etc.), the application of the wireless multimedia communication of integrated voice, data, video traffic was also more and more general.Wireless multimedia communication is multimedia and these two cross one another products of art of radio communication, it provides multimedia service to people on the one hand, also represent a wide technical field on the other hand, become a focus of communication circle and even information industry circle.At present, no matter be in video telephone, gate inhibition's surveillance, the management of intelligent building, still in every field such as video conference, the service of hotel's network, long-distance educations, wireless multimedia communication all has broad application prospects, and will become the main flow of following multimedia application.
Mainly there are two class intercom systems in existing market.One class be with the analog signal be object look audio frequency wire transmission, as the Flexwatch series of Korea S Seyeon Technology, the visible dialogue system of German TCS company, the intelligent intercom system of DH-1000A of Jia Le Electrical Appliances Co., Ltd etc.Their common ground is the real-time Transmission problem that has solved multi-medium data, but all is based on wired system, must carry out the wiring in early stage.And there is line products when the reconstruction of renewal of the equipment, floor, also unavoidably can run into difficulty aspect the wiring.Another kind of as the wide magnificent electronics HC-3012W type wireless remote control doorbell in Taiwan, the GP2000 of Motorola wireless interspeaker etc. all are present more typical wireless remote control transmission products.Though these products have been realized combining of wireless and audio frequency, because the amount of information after the multimedia digitalization is very big, carries out the real-time radio transmission and have suitable difficulty, do not realize video capability.Popular compress technique is MPEG2, MPEG4 and H.263 waits agreement both at home and abroad at present, and the data transfer rate after the MPEG2 compression is 2Mbps, and transmission is obviously inadvisable on wireless channel; MPEG4 and H.263 the data transfer rate after the compression but generally all adopt the method for software to realize the compression and decompression function less than 100kbps, realize having sizable difficulty with hardware fully.
Summary of the invention
For contain much information after the digitlization that overcomes existing wireless intercom system, real-time is poor, do not have the deficiency of video capability, the invention provides the analog-and digital-hybrid technology of a kind of employing, realize compression, coding, transmission and the reception of video, audio frequency and control signal, the wireless visible intercom system that real-time is good.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of wireless visible intercom system, comprise indoor set and off-premises station, described indoor set comprises the first control button, first single-chip microcomputer that is used for processing control signals, first microphone and first loud speaker, first speech chip, first programmable logic device (CPLD) and the first wireless digital transport module, described off-premises station comprises the second control button, the second singlechip that is used for processing control signals, second microphone and second loud speaker, second speech chip, second programmable logic device (CPLD) and the second wireless digital transport module, described first wireless data transfer module cooperates with the second wireless digital transport module, described off-premises station also comprises the camera that is used to gather vision signal, be used for the radio frequency sending module that to launch via the radio frequency sending module through the analog video signal of camera collection and processing, described camera connects the video inputs of radiofrequency emitting module, described camera, radiofrequency emitting module connects second singlechip, described indoor set also comprises Receiver Module, display screen, described Receiver Module cooperates with described radio frequency sending module, receive analog video signal, export liquid crystal display screen to, display image, this picture signal is one-way transmission, the video output terminals of described Receiver Module connects display screen, described Receiver Module, display screen connects first single-chip microcomputer.
As preferred a kind of scheme: in described indoor set, the described first control button comprises supervision button, dislodging machine button and the button of unblanking, the described first control button connects first single-chip microcomputer, described first single-chip microcomputer connects first speech chip and first programmable logic device (CPLD), described first microphone is connected first speech chip with first loud speaker, described first speech chip connects first programmable logic device (CPLD), and described first programmable logic device (CPLD) connects the first wireless digital transport module.
Further, in described off-premises station, the described second control button comprises call button, the described second control button connects second singlechip, described second singlechip connects second speech chip and second programmable logic device (CPLD), described second microphone is connected second speech chip with second loud speaker, and described second speech chip connects second programmable logic device (CPLD), and described second programmable logic device (CPLD) connects the second wireless digital transport module.
Further, described off-premises station also comprises electric lock, and described electric lock connects second singlechip.
Technical conceive of the present invention is: the present invention mainly is made up of two parts, is respectively the indoor section and the outdoor section of wireless visible intercom system.Analog-to-digital conversion and digital-to-analogue conversion, CPLD (CPLD) flush bonding module and up-conversion down conversion module are installed on two parts.The core CPLD flush bonding module of whole system is embedded into algorithm in the CPLD chip to be realized, the key technology that its system realizes all concentrates in this module.Indoor set mainly is made up of first speech chip, a CPLD, first single-chip microcomputer, display screen, Receiver Module and the first wireless digital transport module etc.Off-premises station mainly is made up of second speech chip, the 2nd CPLD, second singlechip, camera, electric lock, radiofrequency emitting module and the second wireless digital transport module etc.
Except organizing by module, for the ease of the realization of system, we also with system by video, audio frequency, channel, radio frequency and control five parts and finish.Video section comprises analogue transmission, liquid crystal display; Audio-frequency unit comprises A/D and D/A, compressing and decompressing audio file; Channel strip comprises multiplexing and demultiplexing, error correction coding, encrypting and decrypting, digital modulation and demodulation; The radio frequency part emphasis solves the emission and the reception of 2.4GHz frequency range; Control section has comprised the Collaboration of whole system, will adopt single-chip microcomputer to realize.
Hardware components such as A/D, D/A, liquid crystal display, radio frequency processing etc. consider to adopt ripe chip to realize at emphasis, and software section considers that with emphasis the method that adopts the CPU+FPGA chip to combine realizes, on algorithm, do outside the optimization process, also must consider the cost of chip, make every effort to make cost to drop to minimum.
In order to make system have storage video reproduction function, also must consider to adopt suitable SDRAM technology.
Apparatus of the present invention are actually the mixed control device of a modulus.Vision signal is a wireless analogue retransmission; Audio signal and control signal are the wireless digital transmission.So its operation principle also will be set forth from analog-and digital-two-way respectively.
It at first is this road of analogue transmission.What transmitted on this road is video analog signal, is one-way transmission.Outdoor, vision signal passes to the video inputs of radiofrequency emitting module through the collection and the processing of camera, is launched by radiofrequency emitting module.Indoor, receive this road video analog signal by corresponding Receiver Module, deliver to liquid crystal display screen from the video output terminals of Receiver Module then, display image.
Another road is exactly a road of a Digital Transmission.The signal of this way word transmission comprises audio signal and control signal, is transmitted in both directions.Indoor, analog voice signal is a digital signal through the treatment conversion of first speech chip, pass to a CPLD, simultaneously, control operation is control signal corresponding (supervision, dislodging machine and a unlocking signal) through the treatment conversion of first single-chip microcomputer, also passes to a CPLD, through processing and the packing of a CPLD, pass to the first wireless digital transport module again, launch by the antenna of module.Outdoor, receive this way word signal by the second wireless digital transport module, passing to the 2nd CPLD then unpacks and handles, respectively audio signal and control signal are passed in second speech chip and the second singlechip then, audio signal is delivered to loud speaker after handling through second speech chip, and control signal goes to control the each several part co-ordination through the processing of second singlechip.The audio signal of another direction (from outdoor to indoor) and control signal (call signal) also are to send and receive by similar mode.
Beneficial effect of the present invention mainly shows: 1, have video capability; 2, real-time is good.
Description of drawings
Fig. 1 is an indoor machine structure block diagram of the present invention.
Fig. 2 is an off-premises station structured flowchart of the present invention.
Fig. 3 is an indoor set circuit diagram of the present invention.
Fig. 4 is an off-premises station circuit diagram of the present invention.
Fig. 5 is an indoor set control flow block diagram of the present invention.
Fig. 6 is an off-premises station control flow block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
With reference to Fig. 1～Fig. 6, a kind of wireless visible intercom system, comprise indoor set and off-premises station, described indoor set comprises the first control button, first single-chip microcomputer that is used for processing control signals, first microphone and first loud speaker, first speech chip, first programmable logic device (CPLD) and the first wireless digital transport module, described off-premises station comprises the second control button, the second singlechip that is used for processing control signals, second microphone and second loud speaker, second speech chip, second programmable logic device (CPLD) and the second wireless digital transport module, described first wireless data transfer module cooperates with the first wireless digital transport module, described off-premises station also comprises the camera that is used to gather vision signal, be used for the radio frequency sending module that to launch via the radio frequency sending module through the analog video signal of camera collection and processing, described camera connects the video inputs of radiofrequency emitting module, described camera, radiofrequency emitting module connects second singlechip, described indoor set also comprises Receiver Module, display screen, described Receiver Module cooperates with described radio frequency sending module, receive analog video signal, export liquid crystal display screen to, display image, this picture signal is one-way transmission, the video output terminals of described Receiver Module connects display screen, described Receiver Module, display screen connects first single-chip microcomputer.
In described indoor set, the described first control button comprises supervision button, dislodging machine button and the button of unblanking, the described first control button connects first single-chip microcomputer, described first single-chip microcomputer connects first speech chip and first programmable logic device (CPLD), described first microphone is connected first speech chip with first loud speaker, described first speech chip connects first programmable logic device (CPLD), and described first programmable logic device (CPLD) connects the first wireless digital transport module.In described off-premises station, the described second control button comprises call button, the described second control button connects second singlechip, described second singlechip connects second speech chip and second programmable logic device (CPLD), described second microphone is connected second speech chip with second loud speaker, described second speech chip connects second programmable logic device (CPLD), and described second programmable logic device (CPLD) connects the second wireless digital transport module.Described off-premises station also comprises electric lock, and described electric lock connects second singlechip.
Fig. 3 is the indoor set circuit diagram (excessive because of circuit diagram, as to resolve into two figure) of present embodiment, and it comprises :+12V power interface (J1); + 5V power interface (J2); Display screen interface (J3); 2.4G receiver module interface (J4) is used for receiving analog voice and analog video signal; Loud speaker (J5); Volume is regulated interface (J6); Keypad interface (J7); R903 interface (J8) is used to send digital speech, sends and receive control signal; Microphone and speaker interface (J9); Bi-colour light interface (J10).
The power supply that the indoor set mainboard is mainly used has :+12V, + 5V, + 3.3V and+3V, wherein+12V and+the 5V power supply is to be produced by the outside by J1 and J2 interface respectively, + 3.3V is+5V process three-terminal regulator block AS1117 (U1) generation, + 3V only is used in the power supply of ding-dong chip ring (U2), and the voltage-stabiliser tube D1 that be usefulness+5V power supply here by a 3V produces.
The control device of present embodiment video intercom is as follows to the voice signal processing procedure:
(1) receive audio digital signals: off-premises station transmits with digital form to the voice signal of indoor set, nRF903 (J9) receives from the next voice signal of off-premises station, handle through CPLD chip EPM3128ATC100 (U5) earlier, as unpack, frame synchronization or the like, the chip output frame synchronously, bit synchronization signal and 16Kbps voice signal be to pronounciation processing chip W9320 (U6), decompress and the D/A conversion through voice, the output analog voice signal is to loud speaker.
(2) send audio digital signals: indoor set transmits with digital form to the voice signal of off-premises station, be input to pronounciation processing chip W9320 (U6) from the analog voice signal of microphone (J8-1 and J8-2) output, handle through A/D and compression, obtain the audio digital signals of 16Kbps, be input to CPLD chip EPM3128ATC100 (U5), carry out as packing, frame synchronization process or the like, and then send to off-premises station through nRF903 (J9).
The control device of present embodiment video intercom is as follows to the control signal processing procedure:
(1) receive control signal: after 21 pin of single chip computer AT 89S51 (U4) detect call signal from off-premises station, carry out following three operations:
A. trigger the ding-dong chip, the triggering signal that produces by the U4-3 mouth is input to ding-dong chip U2-1, at first be input to volume adjusting module interface J6-1 from the ding-dong sound of U2-6 output, be passed to the loud speaker J2-1 of ding-dong sound from the voice signal of J6-2 output after through double operational KA2209B.
B. open display power supply, single-chip microcomputer one detects call signal, just at pulse signal of U4-24 pin output, opens display ground+12V power supply by two triode Q1 and Q2.
C. produce the red light that a high level signal is lighted bi-colour light on the keypad from U4-16, expression ring up state.
(2) transmitting monitoring signal: on pressing the indoor set keypad during monitoring key, single-chip microcomputer U4-38 just receives a pulse signal from keypad interface J7-2.After detecting this signal, just, launch this supervisory signal, be used for initiatively monitoring outdoor situations to off-premises station at pulse signal of U4-24 pin output.
(3) send unlocking signal: during unlock key on pressing the indoor set keypad, single-chip microcomputer U4-37 just receives a pulse signal from keypad interface J7-3.After detecting this signal, just, launch this unlocking signal, be used for opening electric lock to off-premises station at pulse signal of U4-23 pin output.
(4) dislodging machine signal: when indoor when people's off-hook is arranged, at once by S1 cut off ding-dong chip U2-2+the 3V power supply, single-chip microcomputer U4-1 detects off hook signal simultaneously, the U4-22 pin produces a high level signal and opens microphone, can carry out voice transfer.Also have, U4-16 becomes the low level while and produces a pulse signal at U4-17 and light green light on the indoor set keypad, expression talking state.
When people's on-hook was arranged, indoor set returned holding state at once when indoor, and produced a pulse signal at U4-22 simultaneously, was input to the off-premises station that sends by nRF903 behind the CPLD.
(5) nRF903 control signal: by the external switch of single-chip microcomputer U4-28, produce " 1 " or " 0 " signal, carry out the selection of two channels by U4-32.Because nRF903 is semiduplex, so reiving/transmitting state is controlled by single-chip microcomputer, " 1 " expression is sent out, and " 0 " expression is received.
(6) channel selection of 2.4G module: produce by U4-34 power on/standby between the switching of signal.By single-chip microcomputer U4-27 and external two switches of U4-26 mouth, produce four kinds of different composite signals and carry out the selection of four channels by U4-33.
(7) configuration signal: the U4-4-8 mouth on the single-chip microcomputer is used for configured voice chips W 9320.
Fig. 4 is the off-premises station circuit diagram (excessive because of circuit diagram, as to resolve into two figure) of present embodiment, and it comprises :+12V power interface (J1); + 5V power interface (J2); Utilizing camera interface (J3); 2.4G receiver module interface (J4) is used for launching simulation voice and analog video signal; The interface (J5) of unblanking; Keypad interface (J6); R903 interface (J8) is used to send digital speech, sends and receive control signal; Microphone and speaker interface (J7).
The power supply that the off-premises station mainboard is mainly used has :+12V ,+5V and+3.3V.Wherein+12V and+the 5V power supply is to be produced by the outside by J2 and J1 interface respectively ,+3.3V is+5V produces through three-terminal regulator block AS1117 (U1).
The control device of video intercom of the present invention is as follows to the voice signal processing procedure:
(1) send audio digital signals: off-premises station transmits with digital form to the voice signal of indoor set, be input to pronounciation processing chip W9320 (U5) from the analog voice signal of microphone (J5-1 and J5-2) output, handle through A/D and compression, obtain the audio digital signals of 16Kbps, be input to CPLD chip EPM3128ATC100 (U4), carry out as packing, frame synchronization process or the like, and then send to indoor set through nRF903 (J8).
(2) receive audio digital signals: indoor set transmits with digital form to the voice signal of off-premises station, nRF903 (J8) receives from the next voice signal of indoor set, handle through CPLD chip EPM3128ATC100 (U4) earlier, as unpack, frame synchronization or the like, the U4 output frame synchronously, bit synchronization signal and 16Kbps voice signal be to pronounciation processing chip W9320 (U5), decompress and the D/A conversion through voice, the output analog voice signal is to loud speaker (J5-3 and J5-4).
The control device of video intercom of the present invention is as follows to the control signal processing procedure:
(1) send call signal: during assignment key on pressing the off-premises station keypad, call signal just is input to 38 pin of single chip computer AT 89S51 (U3) from interface J6-1, after single-chip microcomputer detects push button signalling, carry out following two operations:
A. output to CPLD through the U3-32 mouth, send call signal to indoor set by the nRF903 transmitter module.
B. open the camera power supply
(2) receive supervisory signal: when single-chip microcomputer U3-35 detected supervisory signal from indoor set, the U3-37 pin produced supervisory signal, utilizes two triode Q2 and Q1 to open the camera power supply.
(3) receive unlocking signal: after single-chip microcomputer U3-34 detected supervisory signal from indoor set, the U3-21 pin produced unlocking signal, utilizes triode Q3 and Q4 to control electric lock by the J7 interface.
(4) receive on-hook signal: when single-chip microcomputer U3-33 detected on-hook signal, off-premises station was in holding state.
(5) nRF903 control:, carry out the selection of two channels by U3-26 by producing " 1 " or " 0 " signal by the external switch of single-chip microcomputer U3-25.Because nRF903 is semiduplex, so reiving/transmitting state is controlled by single-chip microcomputer, " 1 " expression is sent out, and " 0 " expression is received.Produce with U3-28 power on/standby between the switching of signal.
(6) channel selection of 2.4G module:, carry out the selection of four channels by U3-27 by producing four kinds of different composite signals by single-chip microcomputer U3-24 and external two switches of U3-23 mouth.
Claims (4)
1. wireless visible intercom system, comprise indoor set and off-premises station, described indoor set comprises the first control button, first single-chip microcomputer that is used for processing control signals, first microphone and first loud speaker, first speech chip, first programmable logic device (CPLD) and being used for is launched digitized audio signal and control signal by the antenna of module the first wireless digital transport module, described off-premises station comprises the second control button, the second singlechip that is used for processing control signals, second microphone and second loud speaker, second speech chip, second programmable logic device (CPLD) and be used for cooperating with the described first wireless digital transport module, receiving digital signals and the second wireless digital transport module of handling, described audio signal and control signal are two-way transmission, it is characterized in that: described off-premises station also comprises the camera that is used to gather vision signal, be used for the radio frequency sending module that to launch via the radio frequency sending module through the analog video signal of camera collection and processing, described camera connects the video inputs of radiofrequency emitting module, described camera, radiofrequency emitting module connects second singlechip, described indoor set also comprises Receiver Module, display screen, described Receiver Module cooperates with described radio frequency sending module, receive analog video signal, export liquid crystal display screen to, display image, this picture signal is one-way transmission, the video output terminals of described Receiver Module connects display screen, described Receiver Module, display screen connects first single-chip microcomputer.
2. wireless visible intercom system as claimed in claim 1, it is characterized in that: in described indoor set, the described first control button comprises supervision button, dislodging machine button and the button of unblanking, the described first control button connects first single-chip microcomputer, described first single-chip microcomputer connects first speech chip and first programmable logic device (CPLD), described first microphone is connected first speech chip with first loud speaker, described first speech chip connects first programmable logic device (CPLD), and described first programmable logic device (CPLD) connects the first wireless digital transport module.
3. wireless visible intercom system as claimed in claim 2, it is characterized in that: in described off-premises station, the described second control button comprises call button, the described second control button connects second singlechip, described second singlechip connects second speech chip and second programmable logic device (CPLD), described second microphone is connected second speech chip with second loud speaker, described second speech chip connects second programmable logic device (CPLD), and described second programmable logic device (CPLD) connects the second wireless digital transport module.
4. wireless visible intercom system as claimed in claim 3 is characterized in that: described off-premises station also comprises electric lock, and described electric lock connects second singlechip.
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| CN2007100709287A CN101686369B (en) | 2007-08-21 | 2007-08-21 | Novel wireless video doorphone system |
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| CN2007100709287A CN101686369B (en) | 2007-08-21 | 2007-08-21 | Novel wireless video doorphone system |
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| CN101686369A CN101686369A (en) | 2010-03-31 |
| CN101686369B true CN101686369B (en) | 2011-06-29 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102148956A (en) * | 2011-03-30 | 2011-08-10 | 游振德 | Dual-band digital visible talkback doorbell |
| CN102769805B (en) * | 2011-05-05 | 2016-05-04 | 康佳集团股份有限公司 | A kind of visual intercommunication device, system and video intercom method for transmitting signals |
| CN102879702A (en) * | 2012-09-18 | 2013-01-16 | 四川省电力公司绵阳电业局 | Full-automatic voice cable alignment instrument |
| CN104980700A (en) * | 2015-06-23 | 2015-10-14 | 中山市安领星电子科技有限公司 | Wireless network indoor machine |
| CN107786831A (en) * | 2016-08-29 | 2018-03-09 | 罗杰 | The integrated circuit of video speech electric bell |
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| CN2153187Y (en) * | 1993-03-12 | 1994-01-12 | 陈义高 | Signal transmitter for video neibourhood telephone |
| CN2407532Y (en) * | 1999-11-22 | 2000-11-22 | 福建永春华迪通讯设备有限公司 | Multifunctional cordless telephone |
| US6476858B1 (en) * | 1999-08-12 | 2002-11-05 | Innovation Institute | Video monitoring and security system |
| WO2003028375A1 (en) * | 2001-09-27 | 2003-04-03 | Mobiletalk Co., Ltd. | Remote-control entrance door system and method |
| CN1870741A (en) * | 2005-05-26 | 2006-11-29 | 陈建定 | Visual doorbell intercommunication system with wireless telephone function |
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2007
- 2007-08-21 CN CN2007100709287A patent/CN101686369B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2153187Y (en) * | 1993-03-12 | 1994-01-12 | 陈义高 | Signal transmitter for video neibourhood telephone |
| US6476858B1 (en) * | 1999-08-12 | 2002-11-05 | Innovation Institute | Video monitoring and security system |
| CN2407532Y (en) * | 1999-11-22 | 2000-11-22 | 福建永春华迪通讯设备有限公司 | Multifunctional cordless telephone |
| WO2003028375A1 (en) * | 2001-09-27 | 2003-04-03 | Mobiletalk Co., Ltd. | Remote-control entrance door system and method |
| CN1870741A (en) * | 2005-05-26 | 2006-11-29 | 陈建定 | Visual doorbell intercommunication system with wireless telephone function |
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