CN103051816B - A kind of digital audio matrix and TeleConference Bridge - Google Patents

A kind of digital audio matrix and TeleConference Bridge Download PDF

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CN103051816B
CN103051816B CN201210525660.2A CN201210525660A CN103051816B CN 103051816 B CN103051816 B CN 103051816B CN 201210525660 A CN201210525660 A CN 201210525660A CN 103051816 B CN103051816 B CN 103051816B
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phone
fxs
digital audio
matrix
module
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CN103051816A (en
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袁永平
熊悦
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Shenzhen East micro smart Polytron Technologies Inc
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SHENZHEN TENDZONE INTELLIGENT TECHNOLOGY Co Ltd
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Abstract

The invention provides a kind of digital audio matrix and TeleConference Bridge.Digital audio matrix comprises DSP unit and phone module, and this phone module is connected with DSP unit; Phone module comprises FXS, Foreign Exchange Office, FXS and outside MCU control interface, and FXS is used for connecting analog telephone set, and Foreign Exchange Office is used for connecting local telephone; Outside MCU control interface comprises spi bus and pcm bus; DSP unit, for being received the audio signal of the telephone set that remote phone is connected with FXS by pcm bus, is exported after its audio mixing; Remote phone is transferred to by pcm bus after the audio signal mixing of phone analog input signal or digital signal are connected with FXS.The present invention is built-in telephony module in digital audio matrix, and all conference call functions all pass through software simulating in DSP processing unit, greatly reduce hardware cost like this, simplify system wiring.

Description

A kind of digital audio matrix and TeleConference Bridge
Technical field
The present invention relates to videoconference technical field, particularly relate to a kind of digital audio matrix and TeleConference Bridge.
Background technology
Along with the development of the integration in the whole world, the trans-corporation that increasing distribution on global is managed or enterprise are there is, these your company or enterprises or more and more higher to the requirement of modern communication system each other, the application of TeleConference Bridge in enterprise phone system gets more and more, it can greatly improve enterprise work efficiency, improve the management of enterprise, the competitiveness of enterprise.
At present, market there is the solution of two kinds of TeleConference Bridges.
A solution as shown in Figure 1, realizes speech communication by telephone line, and each terminal comprises: the wire telephone be connected and digital audio matrix, and digital audio matrix connects local public address set and microphone; Transmission of audio signal is carried out by telephone wire between multiple terminal.For reducing the impact of echo, between wire telephone and digital audio matrix, be also connected with echo canceller.
As shown in Figure 2, realize speech communication by telephone wire, each terminal comprises another kind of solution: the VOIP phone be connected and digital audio matrix, and digital audio matrix connects local public address set and microphone; Transmission of audio signal is carried out by Ethernet between multiple terminal.
All there is following defect in above-mentioned two kinds of solutions: each terminal all needs adapted wire telephone/VOIP phone and digital audio matrix, the price of exclusive telephone is higher on the one hand, add cost, the holding wire that telephone set is more with being connected needs between digital audio matrix on the other hand, brings inconvenience during use.Thus the solution proposing a kind of simple low cost is necessary.
Summary of the invention
The object of the present invention is to provide a kind of digital audio matrix and TeleConference Bridge, that reduces teleconferencing terminal realizes cost, reduces the complexity of system wiring.
The object of the invention is to be achieved through the following technical solutions:
A kind of digital audio matrix, comprise DSP unit, also comprise built-in phone module, this phone module is connected with DSP unit;
Described phone module, comprises FXS, Foreign Exchange Office, outside MCU control interface; FXS is used for connecting analog telephone set; Foreign Exchange Office is used for connecting local telephone; Outside MCU control interface comprises one group of spi bus for transmitting control data and one group of pcm bus for transmission of audio data;
Described DSP unit, for being received the audio signal of the telephone set that remote phone is connected with FXS by pcm bus, is exported after its audio mixing; Remote phone is transferred to by pcm bus after matrix norm being intended the audio signal mixing of the phone that digital signal that input signal or other device transmission come is connected with FXS;
Described DSP unit comprises central processing unit, peripheral interface and controller;
Described central processing unit comprises further:
Dialing control unit: for issuing Dial Number command to phone module by spi bus; Described DSP unit issues Dial Number command to phone module by spi bus, and the TONE sound generation module of phone module produces corresponding dialing tone according to the telephone number in order, and dialing end enters talking state;
Telephone state detecting unit: for detecting the talking state of phone module; Specifically comprise: when phone be in do not converse in time need to detect S mouth phone whether off-hook or with or without bell signal; The whether on-hook of S mouth phone to be detected when phone has been in call, simultaneously will by detecting whether conversation voice is whether howler tone monitor far-end on-hook, if the on-hook of S mouth phone, configuration state is idle, operate the on-hook of O mouth simultaneously, if detect that the same configuration state of howler tone is idle condition, and hang up O mouth phone.
Wherein, described central processing unit also comprises:
Echo cancellation unit, for sending to the audio signal of remote phone to carry out echo cancellor.
Wherein, described central processing unit also comprises:
Audio signal processing unit, for carrying out various audio frequency processing capacity to audio signal, comprises equilibrium, automatic gain, pressure limit, frequency division, time delay, noise reduction.
A kind of TeleConference Bridge, comprise multiple teleconferencing terminal, described teleconferencing terminal comprises digital audio matrix as above, and the local public address system be connected respectively with digital audio matrix and local microphone.
Compared with prior art, the embodiment of the present invention has following beneficial effect:
1) embodiment of the present invention built-in telephony module in digital audio matrix, all conference call functions all pass through software simulating in DSP processing unit, greatly reduce hardware cost like this, simplify system wiring.
2) in the embodiment of the present invention, digital audio matrix also has echo cancellation function, in order to carry out echo cancellation algorithm process, compared with external echo sounder, also greatly reduces hardware cost, simplifies system wiring.
Accompanying drawing explanation
Fig. 1 is traditional telephone conference system Organization Chart.
Fig. 2 is existing VOIP TeleConference Bridge Organization Chart.
Fig. 3 is the TeleConference Bridge Organization Chart that the embodiment of the present invention provides.
Embodiment
Core concept of the present invention is: be built in digital audio matrix by the phone module with telephony feature, and realizes various conference call functions by DSP unit, saves like this thus saves hardware cost, simplified wiring.
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In the present embodiment, TeleConference Bridge comprises two or more teleconferencing terminals, and each teleconferencing terminal as shown in Figure 3, comprising: digital audio matrix, and the local public address system be connected with digital audio matrix and local microphone.Digital audio matrix comprises: DSP unit and phone module.
Phone module comprises three parts: FXS (Foreign eXchange Station is called for short S mouth), Foreign Exchange Office (Foreign eXchange Office is called for short O mouth), outside MCU control interface.S mouth is used for connecing analog telephone, and O mouth is used for connecing local telephone.Outside MCU control interface, comprises one group of spi bus and one group of pcm bus, and spi bus is used for transmitting control data, and pcm bus is used for transmission of audio data.
DSP unit is that a processing capacity is powerful, the audio process of rich interface.Its central processing unit master clock is 300MHz, 6 grades of stream treatment, 32 floating-point disposal abilities.The peripheral interface that it comprises and controller have serial ports, spi bus, I2C bus, EMAC (RMII/MII) and MDIO network interface, uPP parallel bus, McASP bus, McBSP bus, lcd controller, EDMA3 controller, USB controller, MMC/SD, HPI bus, DDR2 controller, SATA and EMIF controller etc.
For realizing concrete conference call functions, DSP unit specifically comprises following functions unit:
1. control unit: the DSP that dials issues Dial Number command to phone module by spi bus, and the TONE sound generation module of phone module produces corresponding dialing tone according to the telephone number in order, and dialing end enters talking state.
2. telephone state detecting unit: no matter whether phone module is in talking state, and DSP unit all must detect phone module.Phone module is provided with free time, ring, call and dialing four kinds of states.When phone be in do not converse in time need to detect S mouth phone whether off-hook or with or without bell signal, as S mouth phone off-hook needs the state of telephone set to be set to call dialing status, need configuration state to be ringing condition if any bell signal.The whether on-hook of S mouth phone to be detected when phone has been in call, simultaneously will by detecting whether conversation voice is whether howler tone monitor far-end on-hook, if the on-hook of S mouth phone, configuration state is idle, operate the on-hook of O mouth simultaneously, if detect that the same configuration state of howler tone is idle condition, and hang up O mouth phone.
3. echo cancellation unit: by sending into local voice and far-end speech two signals to echo cancellation unit, obtaining the local voice signal of filtering far-end speech through process, then giving far-end.Local voice inputs voice by S mouth phone and Input matrix signal audio mixing obtains.And Input matrix signal is also likely the audio signal of multi-path voice signal.
Under the environment of matrix, microphone, power amplifier, audio amplifier and phone all exact connect ion, videoconference control procedure following steps:
(1) the input first passage arranging digital audio matrix is phone input.
(2) other all input audio mixings except the first input channel are exported to the second tunnel, and the second tunnel output is set for phone output.
(3) by all input channel audio mixings of digital audio matrix to the output first via, to amplify output as this locality.
(4) when needs auto-pickup and automatic hand-up, the auto-pickup and automatic hand-up two buttons of selecting phone control section is clicked.
(5) now with the PC software of matrix or can dial remote phone with the extension set of S mouth, if called with PC software, the phone of S mouth also can be used as extension set.
(6) during end of conversation, can the on-hook of PC software being passed through, also can carry out on-hook by hanging up S mouth phone.
(7) if the other side throws phone into, can be answered by PC software and also can pluck S mouth telephone receiving, the operating procedure of on-hook is the same with the step of on-hook of making a phone call.
Attention: above-mentioned phone module also can use when not connecing S mouth phone.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (4)

1. a digital audio matrix, comprises DSP unit, it is characterized in that, also comprises built-in phone module, and this phone module is connected with DSP unit;
Described phone module, comprises FXS, Foreign Exchange Office, outside MCU control interface; FXS is used for connecting analog telephone set; Foreign Exchange Office is used for connecting local telephone; Outside MCU control interface comprises one group of spi bus for transmitting control data and one group of pcm bus for transmission of audio data;
Described DSP unit, for being received the audio signal of the telephone set that remote phone is connected with FXS by pcm bus, is exported after its audio mixing; Remote phone is transferred to by pcm bus after matrix norm being intended the audio signal mixing of the phone that digital signal that input signal or other device transmission come is connected with FXS;
Described DSP unit comprises central processing unit, peripheral interface and controller;
Described central processing unit comprises further:
Dialing control unit: for issuing Dial Number command to phone module by spi bus; Described DSP unit issues Dial Number command to phone module by spi bus, and the TONE sound generation module of phone module produces corresponding dialing tone according to the telephone number in order, and dialing end enters talking state;
Telephone state detecting unit: for detecting the talking state of phone module; Specifically comprise: when phone be in do not converse in time need to detect S mouth phone whether off-hook or with or without bell signal; The whether on-hook of S mouth phone to be detected when phone has been in call, simultaneously will by detecting whether conversation voice is whether howler tone monitor far-end on-hook, if the on-hook of S mouth phone, configuration state is idle, operate the on-hook of O mouth simultaneously, if detect that the same configuration state of howler tone is idle condition, and hang up O mouth phone.
2. digital audio matrix as claimed in claim 1, it is characterized in that, described central processing unit also comprises:
Echo cancellation unit, for sending to the audio signal of remote phone to carry out echo cancellor.
3. digital audio matrix as claimed in claim 1, it is characterized in that, described central processing unit also comprises:
Audio signal processing unit, for carrying out various audio frequency processing capacity to audio signal, comprises equilibrium, automatic gain, pressure limit, frequency division, time delay, noise reduction.
4. a TeleConference Bridge, comprise multiple teleconferencing terminal, it is characterized in that, described teleconferencing terminal comprise as arbitrary in claims 1 to 3 as described in digital audio matrix, and the local public address system be connected respectively with digital audio matrix and local microphone.
CN201210525660.2A 2012-12-10 2012-12-10 A kind of digital audio matrix and TeleConference Bridge Active CN103051816B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2862539Y (en) * 2005-12-15 2007-01-24 西安大唐电信有限公司 Multipath switch-in apparatus
CN202077182U (en) * 2011-05-20 2011-12-14 深圳市东微智能科技有限公司 Double-source audio matrix

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101518041A (en) * 2006-09-20 2009-08-26 阿尔卡特朗讯 Systems and methods for implementing generalized conferencing

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2862539Y (en) * 2005-12-15 2007-01-24 西安大唐电信有限公司 Multipath switch-in apparatus
CN202077182U (en) * 2011-05-20 2011-12-14 深圳市东微智能科技有限公司 Double-source audio matrix

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