CN104105032A - Audio output device for conference system - Google Patents
Audio output device for conference system Download PDFInfo
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- CN104105032A CN104105032A CN201410353368.6A CN201410353368A CN104105032A CN 104105032 A CN104105032 A CN 104105032A CN 201410353368 A CN201410353368 A CN 201410353368A CN 104105032 A CN104105032 A CN 104105032A
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- audio
- amplifier
- audio output
- controller
- conference system
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Abstract
The invention discloses an audio output device for a conference system. The audio output device for the conference system comprises an audio demultiplexing circuit, an audio mixer, an audio output circuit and an automatic volume regulating device, the output end of the audio demultiplexing circuit is connected with the audio output circuit, the audio output circuit is connected with the audio mixer, the audio mixer is connected with the automatic volume regulating device, the automatic volume regulating device comprises a first amplifier, a second amplifier, a loudspeaker, an integrator and a controller, the output end of the first amplifier is connected with the loudspeaker, the output end of the second amplifier is connected with the input end of the controller through the integrator, the first output end of the controller is connected with the gain control end of the first amplifier, and the second output end of the controller is connected with the gain control end of the second amplifier. The audio output device for the conference system is capable of independently modifying the microphone audio characteristic or recording when outputting mixed audio signals, and the automatic volume regulating device uses the second amplifier, integrator and controller to regulate the amplifier gain.
Description
Technical field
Type of the present invention relates to conference system field, more specifically to a kind of audio output device for conference system.
Background technology
In present Conference Room, adopt the conference system of connected mode hand in hand, also claim desktop type conference amplifying system, because its convenience of installing, operating is widely used.
Handing in hand in conference system, there is branched conference microphone to open simultaneously.Advanced conference system adopts multiplexing technique, by a cable, multiplexed audio signal transmission is arrived to Systematic Main Frame of Meeting in the world, carries out audio mixing at Systematic Main Frame of Meeting.This Systematic Main Frame of Meeting has generally also been installed external audio input interface, for wireless microphone or the input of other sound source signals.Meanwhile, current this Systematic Main Frame of Meeting only has audio mixing output, that is: output is by the audio signal of conference microphone and the audio signal of external audio input signal of branched unlatching.This audio output signal is connected to sound console, power amplifier for on-the-spot public address, or is imported into recorder for session recording.
Although it is low that conference speech people's sound varies, tone has height to have, but because current this Systematic Main Frame of Meeting can only be exported the audio signal after the conference microphone audio mixing of all unlatchings, so can not modify separately the acoustic characteristic of the microphone of each unlatching, the function of the conference microphone sparate sound recording to each unlatching also cannot realize.
In addition, also the conference system that has in the world indivedual employings " star-like " mode to connect, in this conference system, the audio signal of multiple conference device microphones by many independently path be transferred to respectively Systematic Main Frame of Meeting in wired or wireless mode or sound console carries out audio mixing, thereby the acoustic characteristic that can realize easily the microphone to each unlatching modifies separately, or sparate sound recording function.But there is some other drawback in this conference system, to install and operate very inconvenient as " star-like " conference system of wired mode, " star-like " conference system reliability of wireless mode is not high, thereby practical application few.
Summary of the invention
The present invention has overcome deficiency of the prior art, and a kind of audio output device for conference system is provided.
Object of the present invention is achieved by following technical proposals.
A kind of audio output device for conference system, comprise a road input, the audio frequency demultiplexing circuit of multichannel output, mixer, audio output circuit and apparatus for automatically regulating sound volume, microprocessor is connected with described audio frequency demultiplexing circuit input end, described audio frequency demultiplexing circuit output end is connected with described audio output circuit, described audio output circuit is connected with described mixer, described mixer is connected with described apparatus for automatically regulating sound volume, described apparatus for automatically regulating sound volume is by the first amplifier, the second amplifier, loud speaker, integrator and controller composition, described the first amplifier out is connected with described loud speaker, described the second amplifier out is connected with described controller input by described integrator, described controller the first output is connected with described the first amplifier gain control end, described controller the second output is connected with described the second amplifier gain control end.
The outlet of described audio output circuit is RCA interface, bnc interface, XLR interface or terminals of connecting wire.
Described audio output device also comprises recording device, storage device and USB interface, and described storage device is connected with described recording device output, and described USB interface is arranged on the outside of Systematic Main Frame of Meeting.
Described apparatus for automatically regulating sound volume is connected with described recording device input.
Described controller is PID controller.
Beneficial effect of the present invention is: the present invention sets up the bypass audio output circuit with audio frequency output at mixer input to each input, make the Systematic Main Frame of Meeting that contains audio output device in using voice-frequency-multichannel multiplex technique, not only can export the audio signal after the conference microphone audio mixing of all unlatchings, can also modify separately or sparate sound recording the acoustic characteristic of the microphone of each unlatching, be applicable to the needs that each spokesman and organizer process emphatically; Simultaneously of the present invention have an apparatus for automatically regulating sound volume, adopts dexterously the second amplifier, integrator and controller to carry out automatic resonance-amplifier gain, makes user obtain best hearing enjoying.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of apparatus for automatically regulating sound volume in the present invention.
In figure: 1, audio frequency demultiplexing circuit, 2, mixer, 3, audio output circuit, 4, apparatus for automatically regulating sound volume, 5, the first amplifier, 6, the second amplifier, 7, loud speaker, 8, integrator, 9, controller.
Embodiment
Below by specific embodiment, the technical scheme of type of the present invention is further described.
A kind of audio output device for conference system, be arranged in Systematic Main Frame of Meeting, comprise a road input, the audio frequency demultiplexing circuit 1 of multichannel output, mixer 2, audio output circuit 3 and apparatus for automatically regulating sound volume 4, microprocessor is connected with audio frequency demultiplexing circuit 1 input, audio frequency demultiplexing circuit 1 output is connected with audio output circuit 3, audio output circuit 3 is connected with mixer 2, mixer 2 is connected with apparatus for automatically regulating sound volume 4, apparatus for automatically regulating sound volume 4 is by the first amplifier 5, the second amplifier 6, loud speaker 7, integrator 8 and controller 9 form, the first amplifier 5 outputs are connected with loud speaker 7, the second amplifier 6 outputs are connected with controller 9 inputs by integrator 8, controller 9 first outputs are connected with the first amplifier 5 gain control ends, controller 9 second outputs are connected with the second amplifier 6 gain control ends.
The outlet of audio output circuit 3 is RCA interface, bnc interface, XLR interface or terminals of connecting wire.
Audio output device also comprises recording device, storage device and USB interface, and storage device is connected with recording device output, and USB interface is arranged on the outside of Systematic Main Frame of Meeting.
Apparatus for automatically regulating sound volume 4 is connected with recording device input.
Controller 9 is PID controller.
The working method of the present embodiment is: conference microphone audio signal is before entering mixer, be bypassed in the input of multiple audio output circuits, produce single microphone audio frequency output, all lists prop up the output of microphone audio frequency and also can one of mixed device audio mixing generation only comprise unlatching conference microphone audio signal and not comprise that the outside elm of Systematic Main Frame of Meeting enters the audio signal of audio signal, this audio output device not only can be exported the audio signal after the conference microphone audio mixing of all unlatchings like this, can also modify separately or sparate sound recording the acoustic characteristic of the microphone of each unlatching, integrator is to reset once every 10 seconds or one minute, gain signal is also to upgrade once every 10 seconds or one minute, integrator adopts digital integrator, by the integrator accumulated value in known upper 10 seconds or a minute, again according to aggregate-value and preset value comparison, calculate down 10 seconds or one minute yield values by controller and be how many, again yield value is sent to amplifier, volume after controller control, finally be maintained to a rational value, avoid causing output signal otherness large because of the reason of playing audio signal itself, also effectively protect ear to be subject to irritating of loud noise, or avoid can not hear clearly because volume is too small.
Above the present invention is done to exemplary description; should be noted that; in the situation that not departing from core of the present invention, the replacement that is equal to that any simple distortion, amendment or other those skilled in the art can not spend creative work all falls into protection scope of the present invention.
Claims (5)
1. the audio output device for conference system, it is characterized in that: comprise a road input, the audio frequency demultiplexing circuit (1) of multichannel output, mixer (2), audio output circuit (3) and apparatus for automatically regulating sound volume (4), microprocessor is connected with described audio frequency demultiplexing circuit (1) input, described audio frequency demultiplexing circuit (1) output is connected with described audio output circuit (3), described audio output circuit (3) is connected with described mixer (2), described mixer (2) is connected with described apparatus for automatically regulating sound volume (4), described apparatus for automatically regulating sound volume (4) is by the first amplifier (5), the second amplifier (6), loud speaker (7), integrator (8) and controller (9) composition, described the first amplifier (5) output is connected with described loud speaker (7), described the second amplifier (6) output is connected with described controller (9) input by described integrator (8), described controller (9) first outputs are connected with described the first amplifier (5) gain control end, described controller (9) second outputs are connected with described the second amplifier (6) gain control end.
2. the audio output device for conference system according to claim 1, is characterized in that: the outlet of described audio output circuit (3) is RCA interface, bnc interface, XLR interface or terminals of connecting wire.
3. the audio output device for conference system according to claim 1, it is characterized in that: described audio output device also comprises recording device, storage device and USB interface, described storage device is connected with described recording device output, and described USB interface is arranged on the outside of Systematic Main Frame of Meeting.
4. the audio output device for conference system according to claim 4, is characterized in that: described apparatus for automatically regulating sound volume (4) is connected with described recording device input.
5. the audio output device for conference system according to claim 1, is characterized in that: described controller (9) is PID controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410353368.6A CN104105032A (en) | 2014-07-23 | 2014-07-23 | Audio output device for conference system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410353368.6A CN104105032A (en) | 2014-07-23 | 2014-07-23 | Audio output device for conference system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104105032A true CN104105032A (en) | 2014-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410353368.6A Pending CN104105032A (en) | 2014-07-23 | 2014-07-23 | Audio output device for conference system |
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| CN (1) | CN104105032A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104768095A (en) * | 2015-03-17 | 2015-07-08 | 刘银明 | Intelligent loudspeaker in meeting room |
| CN109302575A (en) * | 2018-08-21 | 2019-02-01 | 广州市保伦电子有限公司 | A kind of wifi conference system based on IOT module |
| CN109691136A (en) * | 2016-09-08 | 2019-04-26 | 株式会社索思未来 | Audio signal processor |
-
2014
- 2014-07-23 CN CN201410353368.6A patent/CN104105032A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104768095A (en) * | 2015-03-17 | 2015-07-08 | 刘银明 | Intelligent loudspeaker in meeting room |
| CN109691136A (en) * | 2016-09-08 | 2019-04-26 | 株式会社索思未来 | Audio signal processor |
| CN109691136B (en) * | 2016-09-08 | 2020-09-08 | 株式会社索思未来 | Audio signal processing apparatus |
| CN109302575A (en) * | 2018-08-21 | 2019-02-01 | 广州市保伦电子有限公司 | A kind of wifi conference system based on IOT module |
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| C06 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
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Application publication date: 20141015 |