JPS5954369A - System for displaying speaker level in conference telephone system - Google Patents

Abstract

PURPOSE:To reduce click noise leaked to a receiving side of a conference telephone system, by connecting an integrator between a level detector and a light emitting display and making the change in current flowing to the light emitting display gentle with the change in an input current of the integrator. CONSTITUTION:A voice signal inputted to microphones 1<1>-1<n> is amplified at amplifiers 2<1>-2<n>, transmitted to a receiving side via a mixing circut 6, its amplified signal is detected at level detectors 3<1>-3<n> and light emitting diodes 5<1>-5<n> are lighted when the level reaches a prescribed level or over. Further, integrators 4<1>-4<n> are connected between the level detectors 3<1>-3<n> and the light emitting diodes 5<1>-5<n> so as to make the current change flowing at the flickering of the light emitting diodes 5<1>-5<n> gentle.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical field of the invention The present invention relates to a method for displaying whether or not a speaker is speaking at an appropriate level in a speech system. In general, in the so-called conference telephone system, which uses telephones set up in each location to conduct meetings at a distance, people can express their own opinions through telephones and other places. When communicating to someone, the indicator lamp indicates whether the speaker is speaking at the appropriate level of sound R1, and the progress of the meeting is 1-1.
It is being

However, it is at the level of a conventional speaker! Method: As shown in Figure 1, the audio signal inputted through the micropons 1', 2', 21' is amplified by the amplifiers 2', 2', . 6 received through pregnancy 111i1
'\Send out and its width signal 4 Level 4 Detector 3
'g: ('r...When detected by 311 and exceeds a predetermined level, light emitting diode 5+.

5,...5 are lit.

However, the conventional method shown in Figure 1 uses a level calculator 31°3, .
By the output of 3, lI! Light emitting diode 51゜5 in contact with j
, ... 5, an extremely rapid pulse 'a1A1-' flows through each light emitting diode at the time of lighting, and the level indicated by the 'a1A1-' current flowing through this light emitting diode exceeds the microphone power). Much better than the input audio signal.

Third, there is a problem in that the influence of the willpower of the light emitting diode or the shock wave that flows when the light is turned off is output from the receiver's voice circuit Vζ and the receiver's subwoofer circuit as a click shoulder. be.

(3) Object of the invention The object of the invention is to -
1. By slowing down the flow, the meeting ij'9
'I13. 'Click gentleman that leaks into the receiving side of the jammed stem' Suppressing the sound order X? ! ＞The purpose of this project is to promote the smooth progress of the system by selling the audio signal φ1 in the talk system.

(4) According to the present invention, the level of the prestige signal of the speaker manually inputted into the microphone of the speech system is detected by the level detector and is determined to be at an appropriate level at 7. Or'ff- Luminescent display defect vs. weight or slight 9, by displaying! In the display method, the VC between the upper
41'i divider busy tL,, l mountain divider's human power Nf1g flow change, luminous indicator sheath flows>i R change is made gentle 2/here and k 'lshi+' sign Kanazume “01
In the story system Z) i old hell expression J< method is provided.

(5) Other than the embodiments of the invention, the present invention will be explained with reference to the following description.

Figure 2 shows a meeting related to the unexploded 1yJ, and a meeting with Zombie.
・Circuit 4'M for implementing Ruru speaker level expression method
It is an i-composition. Q:L level detectors 3', 31. ...3n and luminescent tie handling JI,
5'...511 Integrator 41.42. ...4
The circuit of f321-1, which was connected in 11 minutes, is the system controller in one conference room, and similar circuits are installed in other conference traps. Ray A11f device 3',
32. -3"4' MIK 4' , 4' , -4
'1 No. 54 Example ilj: This is the trace shown in FIG. The name Bell Sugi 1 output device has a rectifier section consisting of die seed 1]l and L12, and a comparison section consisting of a ratio device C(JM)',
Is it okay in the preparatory v11 section? The input U voice signal is input to the negative terminal of the bell comparator (j tl M P ), and the preset level is set to 1F level "-vI and relative soft-J
3, and each 4Ij<divider is 99 depending on the on/off operation of the switching transistor Tr due to the time constant frozen by the resistor pair and the capacitor CI.
The 1r7 quiode 5' has a n+'r characteristic that makes the change in the equation slow.

Microphone, for example, when the speaker faces the I'
Then, the audio signal is amplified by F21.
Then, the other I"lj:"'♀ is provided in I-)J and is also transmitted to the receiving circuit.

At times 11 and 11, the audio signal with a width of J'i'i is supplied to the level detector 31 and is compared with the reference level -V in the comparator section via the VIL section. Sound (1 if g and bell is smaller than reference level -v, comparator 00MP
The output signal i1.11' is the output signal i1.11, and the output signal is
The transistor Tr+ is in the OFF state, and the light emitting guide 51 is in the OFF state. not light.

1°E J"4F'< level is greater than the reference level - ■, the comparator (,! OM F output signal month is "
The base side of the transistor Tr is at a lower potential than the emitter side.Moreover, due to R8 and CI, the base's peak and 2'L, which change slowly, flow. Therefore, this base Ichihara waveform with gradual changes is amplified by Tr, and its collector 11°Cb1 is increased to resistor R+ o'
, f: Pir, Reru. Retrieved by Rlo? A pressure of 1°C is applied to the base of transistor Tr2, and the emitter is higher than that on the opposite side. l becomes -(fTr.

V-yo on 4 nori voice and disappear Kayuruya Katana 7r1. '[
Jj, vIL of four colors) flow through the c diode 5', and the light emitting diode is Dogetsu-3-7,).

This operation t: J-microphone 11. The same applies to 111.

(6) Effects of the Invention According to the above, according to the present invention, when the light-emitting diode blinks, VIL is generated '11', and flow rate is increased ('11').
Therefore, the receiving side of the system
1) It is possible to suppress the click noise that is introduced, 2) to measure the quality of the audio signal in the pasting system, and to proceed with the process.

[Brief explanation of the drawing]

Figures 1 and 2'82 are circuit diagrams for implementing the speaker level table 2J'= system in the conventional and present conference telephone systems, respectively;
2 is a circuit diagram of an embodiment of FIG. 2; FIG. tlt+2. ...1fl...Microbon,
21.22. ...2n...Preamplifier '1
3'13",...311...Level detector 4Z42...4n...Integrator 5', 5'
, 5... Light emitting diode, 6... Mixing circuit. Patent applicant Juno Hatake + f1 Co., Ltd. Patent application agent Akira Aoki Patent attorney Nishidate No. 11 Patent attorney lJ:I Pregnant male patent attorney Akiyuki Yamaguchi

Claims (1)

[Claims] Detection by a level detector of the speaker's voice signal input to the microphone of the conference telephone system.1. In the method of displaying whether or not the level is at an appropriate level by turning on or off the full light-emitting indicator, the upper rudder level detector and the main light indicator are connected to the V-column integrator, and the integrator's manual power is 41" +,
'Change in current (C7 line display) Change in current (C7 line display)
G '7 (j, speaker level table in the story system) F method.