CN202103682U - Novel intelligent automatic mixer having keynote and complete-mute function - Google Patents

Abstract

The utility model relates to a novel intelligent automatic mixer having a keynote and complete-mute function, which comprises N input amplifiers, N signal comparators, a controller, a maximal-value comparator and an output amplifier, and is characterized in that: the controller is a single-chip controller, the mixer also comprises N electronic switches, a mixing channel electronic switch and an audio signal mixer; the N input amplifiers are respectively connected with the N signal comparators and the N electronic switches, and the N electronic switches are respectively connected with the controller and the audio signal mixer; each signal comparator is respectively connected with the controller and the maximal-value comparator, the maximal-value comparator is connected with the controller and the mixing channel electronic switch, the mixing channel electronic switch is connected with the controller and the audio signal mixer, and the audio signal mixer is connected with the output amplifier; and a keynote microphone is selected, the channel electronic switch of the keynote microphone is turned on by the controller, a keynote function control signal is provided, the mixing channel electronic switch is turned off by the controller, so the keynote function can be realized.

Description

Novel intelligent automatic audio mixing device with speaker and whole dumb sound functions

Technical field

The utility model belongs to the stereo set technical field, particularly is exclusively used in the stereo set of speech reinforcement system.

Background technology

At present, the intelligent automatic audio mixing device often is used in speech reinforcement system, and every intelligent automatic audio mixing device can insert 1～N microphone usually, also can many intelligent automatic audio mixing device links reach hundreds of microphones of access.The intelligent automatic audio mixing device is based on the principle work of Noise gate (Noise Gate); When people's speech made microphone receive the voice signal more than a certain " threshold level ", microphone was opened automatically, then closes automatically when keeping silence; Easy to use, flexible, be the user's favorite.

Referring to accompanying drawing 1; Existing its operation principle of intelligent automatic audio mixing device is: will after input amplifier changes into level signal with audio signal, be sent in the signal comparator from the audio signal of every microphone and compare with this road Noise gate threshold level, when its during greater than the Noise gate threshold level this signal can reach the input of " maximum comparator "; In " maximum comparator ", N signal from inlet carried out the comparison of level magnitude size, have only level magnitude in N signal of inlet maximum a road can be exported to output amplifier, grade public address equipment after after output amplifier amplifies, exporting to again.But existing intelligent automatic audio mixing device does not possess speaker's function, because; Speaker's function is to require when main speaker talks; Other people can not talk, and can only listen attentively to main speaker's speech, and this just requires to have only main speaker's microphone signal can pass through the intelligent automatic audio mixing device and is sent to back level public address equipment; And other people microphone signal all can not pass through the intelligent automatic audio mixing device and is sent to back level public address equipment; It is thus clear that existing intelligent automatic audio mixing device can't be accomplished this point, so, the instructions for use of the Conference Room of also just can not meeting the demands with speaker's function.

The utility model content

The utility model is intended to overcome the prior art defective; On the basis that keeps existing intelligent automatic audio mixing device function; Designed the audio mixing channel electron switch and the sound mixer of N road signalling channel, a N electronic switch and intelligent automatic audio mixing passage, formed a kind of novel intelligent automatic audio mixing device with speaker and whole dumb sound functions.

The purpose of the utility model realizes through following technical proposals: the novel intelligent automatic audio mixing device with speaker and whole dumb sound functions comprises: N input amplifier that receives microphone signal; N signal comparator that compares with threshold level; The controller of comparison value is provided to signal comparator; From N signal comparator output signal, choose the maximum comparator of maximum value signal, backward the output amplifier of level apparatus output signal; It is characterized in that: described controller is a singlechip controller; This have speaker and whole novel intelligent automatic audio mixing devices of dumb sound functions also comprise N control from N input amplifier respectively to the electronic switch of output amplifier transmit audio signals through and off, control is from the audio mixing channel electron switch and the sound mixer of being responsible for reception arrival all audio frequency signal of maximum comparator to the through and off of output amplifier transmit audio signals; Wherein, N input amplifier links to each other with N electronic switch with N signal comparator respectively, and N electronic switch links to each other with sound mixer with controller respectively; Each signal comparator links to each other with the maximum comparator with controller respectively; The maximum comparator links to each other with audio mixing channel electron switch with controller; Audio mixing channel electron switch links to each other with sound mixer with controller, and sound mixer links to each other with output amplifier.

When needs speaker function; At first; From 1 to N microphone, choose speaker's microphone, and offer controller speaker microphone setting signal, by the electronic switch of its passage of controller opens; Its audio signal is sent to sound mixer, again through output amplifier backward the output of level public address equipment realize public address; Then; Offer controller speaker function control signal again; By controller the audio mixing channel electron switch of intelligent automatic audio mixing passage cuts out, make the audio signal of intelligent automatic audio mixing passage can not arrive sound mixer, therefore; Can not realize public address, and then realize speaker's function.

When not needing speaker's function, at first, speaker's microphone that cancellation is chosen from 1 to N microphone; And offer controller speaker microphone cancel message, and close the electronic switch of its passage by controller, its audio signal can not be sent to sound mixer; Therefore, can not realize public address; Then, the device speaker function control signal of removing controls again by the audio mixing channel electron switch opens of controller with the intelligent automatic audio mixing passage, can recover intelligent automatic audio mixing signal output public address function.

Particularly from 1 to N microphone, do not choosing under the situation of speaker's microphone; When offering controller speaker function control signal; Controller cuts out the audio mixing channel electron switch of intelligent automatic audio mixing passage; Its intelligent automatic audio mixing output audio signal conductively-closed can not realize public address, has just realized whole dumb sound functions.

Compared with prior art, the beneficial effect of the utility model is: on the basis that keeps the intelligent automatic audio mixing function, increased speaker and whole dumb sound functions, used more flexible; Particularly, can use whole dumb sound functions, fast effectively, and need not turn off device power supply (DPS) or close Headphone Volume Control taking place urgent or special circumstances when not needing public address; After situation is removed, cancel whole dumb sound functions, can recover normal function of use at once.

Description of drawings

Fig. 1 is the structured flowchart of existing intelligent automatic audio mixing device;

Fig. 2 is the structured flowchart of the utility model.

Embodiment

Referring to accompanying drawing 2; The internal structure of the utility model is: the novel intelligent automatic audio mixing device with speaker and whole dumb sound functions comprises: N input amplifier that receives microphone signal; N signal comparator that compares with threshold level; To signal comparator the controller of comparison value is provided, from N signal comparator output signal, chooses the maximum comparator of maximum value signal, backward the output amplifier of level apparatus output signal; It is characterized in that: described controller is a singlechip controller; This have speaker and whole novel intelligent automatic audio mixing devices of dumb sound functions also comprise N control from N input amplifier respectively to the electronic switch of output amplifier transmit audio signals through and off, control is from the audio mixing channel electron switch and the sound mixer of being responsible for reception arrival all audio frequency signal of maximum comparator to the through and off of output amplifier transmit audio signals; Wherein, N input amplifier links to each other with N electronic switch with N signal comparator respectively, and N electronic switch links to each other with sound mixer with controller respectively; Each signal comparator links to each other with the maximum comparator with controller respectively; The maximum comparator links to each other with audio mixing channel electron switch with controller; Audio mixing channel electron switch links to each other with sound mixer with controller, and sound mixer links to each other with output amplifier.

When needs speaker function; At first; From 1 to N microphone, choose speaker's microphone, and offer controller speaker microphone setting signal, by the electronic switch of its passage of controller opens; Its audio signal is sent to sound mixer, again through output amplifier backward the output of level public address equipment realize public address; Then; Offer controller speaker function control signal again; By controller the audio mixing channel electron switch of intelligent automatic audio mixing passage cuts out, make the audio signal of intelligent automatic audio mixing passage can not arrive sound mixer, therefore; Can not realize public address, and then realize speaker's function.

When not needing speaker's function, at first, speaker's microphone that cancellation is chosen from 1 to N microphone; And offer controller speaker microphone cancel message, and close the electronic switch of its passage by controller, its audio signal can not be sent to sound mixer; Therefore, can not realize public address; Then, the device speaker function control signal of removing controls again by the audio mixing channel electron switch opens of controller with the intelligent automatic audio mixing passage, can recover intelligent automatic audio mixing signal output public address function.

Particularly from 1 to N microphone, do not choosing under the situation of speaker's microphone; When offering controller speaker function control signal; Controller cuts out the audio mixing channel electron switch of intelligent automatic audio mixing passage; Its intelligent automatic audio mixing output audio signal conductively-closed can not realize public address, has just realized whole dumb sound functions.

Described singlechip controller is made up of ATMEGA16.

Described sound mixer is made up of TL082.

A described N electronic switch and audio mixing channel electron switch constitute by 2SJ106.

Claims (1)

1. the novel intelligent automatic audio mixing device that has speaker and whole dumb sound functions comprises: N input amplifier that receives microphone signal; N signal comparator that compares with threshold level; The controller of comparison value is provided to signal comparator; From N signal comparator output signal, choose the maximum comparator of maximum value signal, backward the output amplifier of level apparatus output signal; It is characterized in that: described controller is a singlechip controller; This have speaker and whole novel intelligent automatic audio mixing devices of dumb sound functions also comprise N control from N input amplifier respectively to the electronic switch of output amplifier transmit audio signals through and off, control is from the audio mixing channel electron switch and the sound mixer of being responsible for reception arrival all audio frequency signal of maximum comparator to the through and off of output amplifier transmit audio signals; Wherein, N input amplifier links to each other with N electronic switch with N signal comparator respectively, and N electronic switch links to each other with sound mixer with controller respectively; Each signal comparator links to each other with the maximum comparator with controller respectively; The maximum comparator links to each other with audio mixing channel electron switch with controller; Audio mixing channel electron switch links to each other with sound mixer with controller, and sound mixer links to each other with output amplifier.

Images