CN106101873A - A kind of building conversational system based on PSTN public telephone network - Google Patents
A kind of building conversational system based on PSTN public telephone network Download PDFInfo
- Publication number
- CN106101873A CN106101873A CN201610744263.2A CN201610744263A CN106101873A CN 106101873 A CN106101873 A CN 106101873A CN 201610744263 A CN201610744263 A CN 201610744263A CN 106101873 A CN106101873 A CN 106101873A
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- telephone network
- public telephone
- voice
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
- H04Q5/24—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange for two-party-line systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
- H04M11/025—Door telephones
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a kind of building conversational system based on PSTN public telephone network, it includes outdoor machine 1 and indoor machine 2, described indoor machine 2 is arranged in user family, described outdoor machine 1 is arranged at building door entrance, described indoor machine 2 includes that telephone set or handheld mobile device, described outdoor machine 1 include button, PSTN public telephone network communication module, display, electron key seat and control circuit.This system utilizes PSTN public telephone network to carry out gate inhibition's signal control, simple, can be by PSTN net full duplex real-time image transmission and sound, realize the face-to-face communication of building talkback and handheld terminal, it is simple to exchange with visitor outdoors to be registered one's residence the when that owner being inconvenient to answer indoor set or stay out.
Description
Technical field
The present invention relates to a kind of building conversational system, a kind of building talkback system based on PSTN public telephone network
System.
Background technology
The raising required due to building safety, current most of building are fitted with building inter-speaking device, prior art
Middle building inter-speaking device is all to use thick cable wiring, and cost is high, and building talkback dress in wiring relative difficulty, and prior art
Put and mostly simply complete single voice answer-back and door opening function, there is no further password safety protection function.Additionally, owner not
The when of conveniently touching indoor answering machine or go out, it is not easy to treat the visitor registered one's residence and carries out response.
Summary of the invention
The present invention solves that above-mentioned technical problem be employed technical scheme comprise that provides a kind of based on PSTN public telephone network
Building conversational system, it includes that outdoor machine 1 and indoor machine 2, described indoor machine 2 are arranged in user family, described open air
Machine 1 is arranged at building door entrance, described indoor machine 2 include telephone set or handheld mobile device, described outdoor machine 1 include by
Key, PSTN public telephone network communication module, display, electron key seat and control circuit, described PSTN public telephone Netcom
News module includes SIM card slot, launches antenna and circuit, described button, PSTN public telephone network communication module, display,
Electron key seat is connected with described control circuit respectively, and described control circuit passes through PSTN public telephone network network 3 and institute
The indoor machine 2 stated connects, and described control circuit is connected with power supply 4, and described control circuit connects door lock control line, described
Door lock control line be connected with door lock 5, described control circuit connects also by wire and indoor switch of unblanking.
Preferably, described power supply 4 includes that a DC source 42, described DC source 42 are connected with accumulator 41,
Described DC source 42 is connected with alternating current power supply also by a transformator 43；Described control circuit is built-in with memorizer
And signal processor, 1000 telephone numbers can be stored, telephone number length reaches 14, and password maximum can store 1000, close
Code length is 6 bit digital；Described electron key seat includes information button reader.
Preferably, described outdoor machine use electron key as entering password, during to the use of password or electron key
Between limit, outdoor machine is additionally provided with flash appeal button and hands-free talkback unit.
A kind of real-time audio video trans-coding system with video call function for described building conversational system, institute
The real-time audio video trans-coding system stated includes that real-time voice image capture module, digital simulation transcoding module, digital simulation turn
Code monitoring module, H.263 dimensionality reduction code module, H.223 dimensionality reduction code module, G.723.1 voice monitoring module, H.263 image rise dimension
Code module, H.223 liter dimension code module, phonetic image rise dimension code data and strengthen module, phonetic image liter dimension code data transmission blocks,
Wherein: digital simulation transcoding monitoring module, for monitoring the data receiver of digital simulation transcoding module, once data receiver arrives,
Just carrying out H.223 code dimensionality reduction, G.723.1 H.263 code dimensionality reduction code stream out include and；G.723.1 code stream is to pass through
Device driver downloads to carry out in corresponding digital signal processor code dimensionality reduction；H.263 code stream exports and H.263 drops
Dimension code module；G.723.1 voice monitoring module, is used for having monitored whether that G.723.1 voice rises dimension code data, if there is voice
If rising dimension code data, just liter dimension code data are read in host memory, simultaneously by the G.723.1 voice dimensionality reduction code in internal memory
Data download in corresponding digital signal processor；H.263 image rises dimension code module, for gathering complete at original image
In the case of carry out code H.263 and rise dimension；H.223 rise dimension code module and voice and image are carried out code liter dimension, pass through phonogram
Carry out data enhancing as rising dimension code data transmission blocks, rise dimension code data transmission blocks by phonetic image and be sent to digital simulation
Transcoding module is used for transmitting.
The present invention utilizes PSTN public telephone network to carry out gate inhibition's signal control, simple, can pass through PSTN net full duplex
Real-time image transmission and sound, it is achieved building talkback and the face-to-face communication of handheld terminal, it is simple to owner is inconvenient to answer indoor set
Or exchange with visitor outdoors to be registered one's residence the when of staying out.
Accompanying drawing explanation
Fig. 1 is the structural representation of a preferred embodiment of the building conversational system of the PSTN public telephone network of the present invention
Fig. 2 is that the building conversational system of the PSTN public telephone network of the present invention is with user's handheld mobile device communicates
System structural representation.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is made with detailed description:
As it is shown in figure 1, the PSTN public telephone network building conversational system of the present invention includes outdoor machine 1 and indoor machine 2, described
Indoor machine 2 be arranged in user family, described outdoor machine 1 is arranged at building door entrance, described indoor machine 2 include telephone set or
Handheld mobile device, described outdoor machine 1 include button, PSTN public telephone network communication module, display, electron key seat and
Control circuit, described PSTN public telephone network communication module includes SIM card slot, launches antenna and circuit, described button,
PSTN public telephone network communication module, display, electron key seat are connected with described control circuit respectively, described control electricity
Road is connected with described indoor machine 2 by PSTN public telephone network network 3, and described control circuit is connected with power supply 4, described
Control circuit connects has door lock control line, described door lock control line to be connected with door lock 5, and described control circuit is also by wire
Unblank with indoor to switch and be connected.
Further, described power supply 4 includes a DC source 42, and described DC source 42 is with accumulator 41 even
Connecing, described DC source 42 is connected with alternating current power supply also by a transformator 43.
Further, described control circuit is built-in with memorizer and signal processor, 1000 phone number can be stored
Code, telephone number length reaches 14, and password maximum can store 1000, and Password Length is 6 bit digital.
Further, described electron key seat includes information button reader.
Additionally, the use time of password or electron key can be limited by described outdoor machine, available electron key is made
For entering password, it is additionally provided with flash appeal button and hands-free talkback unit.The application process of the present embodiment is as described below:
1. visitor calls resident family: visitor only need to input floor number and the room number of resident family, and system meeting automatic poking stops the electricity at family
Words, when resident family connects phone, visitor just can carry out voice dialogue with resident family and image is mutual, after resident family confirms visitor's identity,
Can press " * " on telephone set, " # " key opens the door；Hang up the telephone, then refusal visitor enters.
2. password is pressed by resident family or electron key enters: when resident family oneself enters, have 2 kinds of modes selective.A kind of mode
It is to open resident family gate by " * " at cryptographic interface 6 passwords of input；Another way is to be placed on key holder by electron key,
System identifies back pullout (BPO) automatically.
3. resident family or visitor go out: having a button of going out near gate, click this button, door lock can be beaten automatically
Open, open door and just can go out.
The outdoor machine of PSTN public telephone network building conversational system also includes that the real-time audio video carrying out video call turns
Code system, this real-time audio video trans-coding system passes through PSTN net full duplex real-time image transmission and sound, its interactivity, network
Distributivity is strong, and transcoding is clearly efficient, achieves building talkback with high speed data transfers in real time and the visual of handheld terminal is led to
Letter, it is simple to exchange with visitor outdoors to be registered one's residence the when that owner being inconvenient to answer indoor set or stay out.
In an embodiment, the real-time audio video trans-coding system carrying out video call passes through digital simulation transcoding, with any
It is connected to PSTN and meets the communication terminal of H.324 agreement on the net alternately, real-time Transmission voice, image and data.
H.324 being that the very low bit rate real-time Communication for Power terminal standard that ITU-T finally determined in 1996 is advised, this suggestion is true
Intercommunication process between different terminals, video and audio-frequency signal compressing method, the multiplexing of transmission code stream and a series of control are determined
System suggestion, main standard includes H.263 video code conversion, G.723.1 audio frequency transcoding, H.223 code stream mixing and multiplexing, H.245
System control etc..
Wherein, H.223 the effect of code stream multiplex agreement is by code stream multiplexs such as voice, image, data, controls together,
Form single bit stream, and single bit stream is resolved into media code stream.Additionally, it also carries out error detection, and
For the mistake of view data, error correcting can be realized by re-transmission.Whole H.223 agreement can be divided into two-layer: multiplex layer
(Multiplex Layer, MUX) and adaptation layer (Adaptation Layer, AL).Multiplex layer (MUX) will be from adaptation layer (AL)
The code stream obtained carries out code stream multiplex according to multi-meter, and utilizes physical layer to be sent to far-end.At adaptation layer and its height
Between the user of layer adaptation layer, the information unit of transmission is referred to as Adaptation Layer Service Data unit (AL Service Data
Unit, AL-SDU), adaptation layer carries out adaptation by increasing some extra bytes to AL-SDU, is then sent to multiplexing
Layer, these extra bytes are used to carry out error detection, sequence numbering and re-transmission.The adaptation of a total of three types
Layer, respectively AL1 layer, AL2 layer, AL3 layer, they are respectively intended to transmit data and control stream, speech code stream and image code stream.
As in figure 2 it is shown, the real-time audio video trans-coding system carrying out video call includes such as lower module: real-time voice image
Acquisition module, digital simulation transcoding module, digital simulation transcoding monitoring module, H.263 dimensionality reduction code module, H.223 dimensionality reduction code mould
Block, G.723.1 voice monitoring module, H.263 image rise dimension code module, H.223 liter dimension code module, phonetic image rises dimension code data
Strengthen module, phonetic image rises dimension code data transmission blocks, wherein: digital simulation transcoding monitoring module, is used for monitoring numeral mould
Intending the data receiver of transcoding module, once data receiver arrives, and just carries out H.223 code dimensionality reduction, code dimensionality reduction stream packet out
H.263 and G.723.1 include；G.723.1 code stream is to be downloaded in corresponding digital signal processor by device driver
Carry out code dimensionality reduction；H.263 code stream exports H.263 dimensionality reduction code module；G.723.1 voice monitoring module, for supervision be
No have G.723.1 voice to rise dimension code data, if rising dimension code data if there is voice, just liter dimension code data is read in main frame
In depositing, the G.723.1 voice dimensionality reduction code data in internal memory are downloaded in corresponding digital signal processor simultaneously；H.263
Image rises dimension code module, rises dimension for carrying out code H.263 in the case of original image collection is complete；H.223 dimension code is risen
Module carries out code and rises dimension voice and image, rises dimension code data enhancing module by phonetic image and carries out data enhancing, afterwards
Rise dimension code data transmission blocks by phonetic image and be sent to digital simulation transcoding module for transmitting.
In a preferred embodiment, the communication process of videophone is set up as follows.
Step A: the call setup of voice band channel and primary simulation telephone communication
Calling party connects according to simulation phone procedure request, is once successfully completed call setup, is introduced into simulation phone
Communications status, enters step B by user's manual operations.
Step B: the foundation of digital communication and the training of digital simulation trans-coding system
Digital simulation trans-coding system for radio phone terminal operates with full duplex, synchronous mode.Wherein, modulation /demodulation
Mode is QAM quadrature amplitude modulation keying, QPSK QPSK；It is 4 dimension network codes (16,32,64 shapes that code rises dimension mode
State)；Data rate is 21.6Kbit/s.
Step C: initialize
(1), after establishing digital communication, send minimum 16 HDLC and indicate to keep synchronizing, apply thereafter and H.324 control
Communication between channel initialization system.Because not yet transmission multiplex table entries is to recipient, therefore use multiplex table entries.Send initial control
Information processed；
(2) H.324 terminal by carrying out capabilities exchange, then the principal and subordinate carrying out terminal is determined.If capabilities exchange or master
From determining unsuccessfully, at least should try again twice before terminal is abandoned connecting and entering step F；
(3), after said process completes, terminal should open the logic channel of each message stream according to H.245 code, and carries out multiple
Sending with table clause, sequencing both this is not required, but only opens when a certain logic channel, corresponding multi-meter bar
Could be in channel message after mesh is defined.
Step D: communication
In this step, can follow and H.245 advise logic channel attribute, ability or reception pattern are modified.
L () in this step, digital simulation trans-coding system is being with or without transient data interruption or the situation of loss of data
Under, retraining or change its message transmission rate.If occurring, instantaneous data transfer interrupts, and terminal should not restart step c, and
Step D should be maintained at, and H.223 perform conventional H.324 Error Resiliency code according to suggestion；
(2) lose, eventually if terminal detects that digital simulation trans-coding system communication unexpected, expendable or PSTN connect
End should immediately enter step F, i.e. walks around step E, disconnects or enter simulation telephony mode.
Step E: terminate call
Any terminal all can actively terminate call, first starts the terminal terminating to converse and should follow procedure below.
(1) carry each logic channel of video signal, stop sending video data at the end of complete image, and close
Respective logical channels；
(2) carrying audio frequency or each logic channel of data are closed；
(3) should to far-end send H.245 terminate call message (EndSessionCommand), then interrupt all H.245
Message is transmitted.The pattern being somebody's turn to do be entered after " end call message " should inform far-end end of conversation (disconnects, simulates phone mould
Formula or other pattern)；
(4) the end call message (EndSessionCommand) come to far-end transmission is received, if it is known that after end of conversation
Entrance disconnects, and should be no longer waiting for far-end and terminate call message, and be directly entered step F.
If terminal receives far-end and sends the end call message of coming, and the most actively sends this message, then: if starting
The EndSessionCommand message of the terminal terminating call indicates " disconnecting ", is then optionally fed into said process (3),
Enter back into step F；
Otherwise, enter said process (3), enter back into step F, if may, this reception terminal can enter
New pattern indicated in EndSessionCommand message.
Step F: call clearing
If due to unexpected chain rupture, entering this step, terminal should enter as mentioned above and disconnect or enter simulation phone mould
Formula.
Wish that the terminal terminating call should first start process described in step E.Terminal should be according to terminating call message
(EndSessionCommand) the execution action indicated by.The removing code defined in suggestion V.34 should be started, unless bright
Really inform that disconnecting PSTN the most physically connects and enter simulation telephony mode.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, the change that can readily occur in or replacement,
All should contain within protection scope of the present invention.Therefore, protection scope of the present invention answers the described protection model with claim
Enclose and be as the criterion.
Claims (4)
1. a building conversational system based on PSTN public telephone network, it includes outdoor machine (1) and indoor machine (2), described
Indoor machine (2) is arranged in user family, and described outdoor machine (1) is arranged at building door entrance, and described indoor machine (2) includes phone
Machine or handheld mobile device, described outdoor machine (1) includes button, PSTN public telephone network communication module, display, electronics key
Spoon seat and control circuit, described PSTN public telephone network communication module includes SIM card slot, launches antenna and circuit, described
Button, PSTN public telephone network communication module, display, electron key seat be connected with described control circuit respectively, described
Control circuit be connected with described indoor machine (2) by PSTN public telephone network network (3), described control circuit and power supply
(4) connecting, described control circuit connects has door lock control line, described door lock control line to be connected with door lock (5), described control
Circuit processed is unblanked to switch connect also by wire and indoor.
2. building conversational system as claimed in claim 1, it is characterised in that described power supply (4) includes DC source (42),
Described DC source (42) is connected with accumulator (41), and described DC source (42) is also by a transformator (43) and friendship
Stream power supply connects；Described control circuit is built-in with memorizer and signal processor, 1000 telephone numbers, phone can be stored
Number length reaches 14, and password maximum can store 1000, and Password Length is 6 bit digital；Described electron key seat includes letter
Breath button reader.
3. building conversational system as claimed in claim 2, it is characterised in that described outdoor machine uses electron key as entering
Entering password, limit the use time of password or electron key, outdoor machine is additionally provided with flash appeal button and hands-free right
Say device.
4. for a real-time audio video trans-coding system for the building conversational system described in claim 1, described real-time sound
Frequently video code conversion system include real-time voice image capture module, digital simulation transcoding module, digital simulation transcoding monitoring module,
H.263 dimensionality reduction code module, H.223 dimensionality reduction code module, G.723.1 voice monitoring module, H.263 image rise dimension code module, H.223
Rise dimension code module, phonetic image rises dimension code data enhancing module, phonetic image rises dimension code data transmission blocks, wherein:
Digital simulation transcoding monitoring module, for monitoring the data receiver of digital simulation transcoding module, once data receiver arrives, just
Carrying out H.223 code dimensionality reduction, G.723.1 H.263 code dimensionality reduction code stream out include and；G.723.1 code stream is by setting
Standby driver downloads to carry out in corresponding digital signal processor code dimensionality reduction；H.263 code stream exports H.263 dimensionality reduction
Code module；G.723.1 voice monitoring module, is used for having monitored whether that G.723.1 voice rises dimension code data, if there is voice liter
If dimension code data, just liter dimension code data are read in host memory, simultaneously by the G.723.1 voice dimensionality reduction yardage in internal memory
According to downloading in corresponding digital signal processor；H.263 image rises dimension code module, for gathering complete feelings at original image
Carry out code H.263 under condition and rise dimension；H.223 rise dimension code module and voice and image are carried out code liter dimension, pass through phonetic image
Rise dimension code data enhancing module and carry out data enhancing, then be sent to digital simulation by phonetic image liter dimension code data transmission blocks
Transcoding module is used for transmitting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610744263.2A CN106101873A (en) | 2016-08-26 | 2016-08-26 | A kind of building conversational system based on PSTN public telephone network |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610744263.2A CN106101873A (en) | 2016-08-26 | 2016-08-26 | A kind of building conversational system based on PSTN public telephone network |
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| CN106101873A true CN106101873A (en) | 2016-11-09 |
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| CN201610744263.2A Pending CN106101873A (en) | 2016-08-26 | 2016-08-26 | A kind of building conversational system based on PSTN public telephone network |
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| WO2007045526A1 (en) * | 2005-10-21 | 2007-04-26 | Siemens Aktiengesellschaft | Signalling for establishing an h.324 videotelefony connection between a media gateway and a controller |
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Application publication date: 20161109 |