KR101248952B1 - Multi function audio/video system - Google Patents

Abstract

PURPOSE: An audio system for controlling a voice level is provided to solve the inconvenience in the system which is produced and managed corresponding to each producer and model due to a difference in the voice level corresponding to each producer and model. CONSTITUTION: An attenuation unit(4) attenuates and controls audio signals of a transmitting unit and a receiving unit in order to be a proper level. A first OP AMP(Operational Amplifying) unit(2) amplifies the audio signals from the receiving unit which are attenuated through the attenuation unit. A second OP AMP unit(3) amplifies the audio signals from the transmitting unit. The attenuation unit is an IC(Integrated Circuit) which attenuates levels of a transmitting sound and a receiving sound. The attenuation unit performs communication with MCU and I2C data. [Reference numerals] (2,3) OP AMP unit; (20) PSTN line combination unit; (4) Attenuation unit; (60) AUDIO AMP unit; (70) AUDIO PROCESSOR unit; (80) SPEAKER PHONE unit; (AA) Connection; (BB) Call path;

Description

Audio system capable of adjusting the audio level {MULTI FUNCTION AUDIO / VIDEO SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an audio system capable of adjusting a voice level, and more particularly, to an audio system capable of adjusting a voice level of a voice communication with a home automation device and a home network device, So that the voice level is different according to the maker and the model making voice call, so that the voice level control that eliminates the inconvenience of the system for producing and post-managing each maker and model Lt; / RTI >

According to a conventional multifunctional audio system (registered as Utility Model Registration No. 20-0191662 issued Feb. 29, 2000) registered by the applicant of the present invention, a technology having an audio function capable of recording a message of the other party immediately during a telephone conversation is disclosed And a multifunctional audio / video system having a multi-function audio / video device and a mobile computer (Patent Registration No. 10-0464262, registered on December 21, 2004) has been disclosed.

However, in such a home automation system, the audio signal varies from 20 mV to 2.3 V, and there is no standard signal. Therefore, there is a problem that the voice is large or small, or that the voice is cut off and the call is impossible.

Also, in the speakerphone circuit diagram, if the value is set by setting all the values such as RS and TS values, it takes time to adjust the voice level since the values are different for each company.

In order to make a visitor call, the MC34118 speakerphone IC, which is commonly used, is used. This IC makes a voice call with half duplex, compares the volume of the receiver with the receiver, Allows you to make calls. To control the proper volume, you must change the values of the circuitry around the MC34118. Since the element value is closely related to the transmission volume and the hydration volume, when the volume of the transmission is raised, the volume of the hydration is decreased or cut off. When the hydration volume is increased, the volume of the transmission is influenced, Howling occurs.

Therefore, although the devices of the peripheral circuits are always adjusted to the appropriate values in accordance with the home automation equipment and the home network equipment connected to the product, there is a great variation in the volume for each maker and model, so that one basic model must change the device value for each manufacturer Production and post-management.

An object of the present invention is to provide a method and apparatus for controlling a voice level by adjusting the level of a voice signal, And it is an object of the present invention to provide an audio system capable of adjusting the audio level so as to eliminate the inconvenience of the system.

According to a preferred embodiment of the present invention,

Audio system with adjustable voice level

A ring detector unit for detecting a ring signal of the PSTN, a PSTN line coupling unit constituted by a call current coupling unit and an AC input coupling unit in a DC LOOP unit of the PSTN, an audio amplifier unit, an audio processor unit, In the system,

An attenuation unit for attenuating the audio signal of the transmitter unit and the receiver unit to adjust the audio signal to an appropriate level;

A first operational amplifier unit for amplifying an audio signal of a transmission unit attenuated through the attenuation unit; And

And a second operational amplifier unit for amplifying an audio signal of the receiver unit to be attenuated through the attenuation unit.

Preferably,

The attenuator is an IC that serves to attenuate the level of the transmitted and synthesized sounds. The IC attenuates the volume by 1 dB / step from 0 to -79 dB with the MCU, system.

Preferably, the input terminal of the receiver unit and the output unit of the transmitter unit are connected to the matching transformer and include a feedback circuit and a filter circuit for reducing the loss of the volume caused by the impedance while passing through the matching transformer, .

As described above, according to the audio system capable of adjusting the audio level according to the present invention, it is possible to adjust the voice input / output level of the home automation device and the home network device and the voice input / output level of the telephone device, It is possible to eliminate the inconvenience of a production and follow-up management system for each maker and model because the voice level is different according to makers and models that make voice calls by adjusting the level of the voice communication volume by the program without changing the device .

1 is a schematic block diagram of an audio system capable of adjusting a voice level according to the present invention.
2 is a detailed circuit diagram of the attenuator, the amplification stage, the amplification stage, and the feedback circuit of FIG.
3 is a detailed circuit diagram of the attenuator of FIG.
FIG. 4 is a table showing the detailed configuration of the functional bits and the attenuation bits in FIG. 3;

Hereinafter, an audio system capable of adjusting the audio level according to the present invention will be described in detail with reference to the accompanying drawings.

An audio system capable of adjusting a voice level according to the present invention includes an amplification unit for amplifying a hydration level input from a telephone device and an interlocking device and an attenuation unit for attenuating the hydration level amplified by the amplification unit of the hydration level to an appropriate level level, An amplifier for amplifying a transmission level inputted from a microphone (MIC) and an attenuator for attenuating the amplified transmission volume to an appropriate level level.

Hereinafter, detailed description of the same components as those of the conventional art will be omitted in the audio system capable of adjusting the audio level according to the present invention.

Referring to FIG. 1, an audio system capable of adjusting a voice level according to the present invention includes a ring detector unit 10 for detecting a ring signal of a PSTN, a PSTN line 10 comprising a talk current coupling unit and an AC input coupling unit, An audio processor 60, an audio processor 70, and a speakerphone unit 80, as shown in FIG.

An audio system capable of adjusting the audio level according to the present invention includes an attenuator for attenuating audio signals of a transmitter and a receiver and adjusting the audio signal to an appropriate level;

A first operational amplifier unit for amplifying an audio signal of the receiver unit attenuated through the attenuation unit; And

And a second operational amplifier unit for amplifying the audio signal of the transmission unit attenuated through the attenuation unit.

1, the input terminal of the receiver and the output terminal of the transmitter are connected to the matching transformer, and a loss is generated due to the impedance while passing through the matching transformer. Therefore, a feedback circuit and a filter circuit are configured to reduce the loss of volume Thereby preventing distortion.

The first operational amplifier 2 is amplified by the receiver unit, and the synthesized signal, which has passed through the feedback circuit of the feedback circuit unit 1, is attenuated to an appropriate level by the attenuation unit 4 and amplified again.

The second operational amplifier unit 3 is an amplification stage of the transmitter unit. The amplified signal is attenuated to an appropriate level by the attenuation unit 4, amplified, and transmitted again.

The attenuation unit 4 is an IC that serves to attenuate the level of the transmitted and received sounds. The attenuator 4 communicates with the MCU via I 2 C data and attenuates the sound by 1 dB / step from 0 to -79 dB.

Referring to FIG. 3, a detailed block diagram of the attenuation unit 4 is shown. The PT2257 (U110) used in the attenuation unit 4 is a two-channel electronic volume controller having two inputs and two outputs (Electronic Volume Controller) IC. It consists of 10dB / step attenuator and 1dB / step attenuator. It can communicate with MCU through I2C interface and attenuate the volume from 0 to -79dB in 1dB / step. One channel attenuates the receiver and the other channel attenuates the receiver.

Referring to FIG. 4, the PT2257 functions as an electronic volume controller IC by transmitting and receiving the functional bits and the attenuation unit bits to and from the I2C.

According to the function bit table, definitions of MSB, 2, 3, 4, 5, 6, 7, LSB and function are shown. Functions for 2 channels and left and right channels are displayed respectively.

According to the attenuation unit bit table, there are A3, A2 / B2, A1 / B1 and A0 / B0 items and the attenuation value (dB) is displayed.

Where Ax = -dB / step and Bx = -10dB / step.

For example, if the left channel attenuation is -33 dB, it is as shown in the lower part of FIG. That is, the left channel is -30 dB and the left channel is -3 dB.

The present invention is used not only as a single product but also in connection with a home automation device, a home network device, and a PSTN (trunk line) in order to perform functions such as visitor identification, call, and telephone call.

Previously, the MC34118 speakerphone IC, which is commonly used to make a visitor call, is used. The IC uses a half duplex voice communication and compares the volume of the receiver to the volume of the receiver. So that the user can make a call. To control the proper volume, you must change the values of the circuitry around the MC34118. Since the element value is closely related to the transmission volume and the hydration volume, when the volume of the transmission is raised, the volume of the hydration is decreased or cut off. When the hydration volume is increased, the volume of the transmission is influenced, Howling occurs. Therefore, although the devices of the peripheral circuits are always adjusted to the appropriate values in accordance with the home automation equipment and the home network equipment connected to the product, there is a great variation in the volume for each maker and model, so that one basic model must change the device value for each manufacturer Production and post-management. However, according to the present invention, since the volume can be finely controlled by the program without changing the value of the element, production and post-management are improved.

2: first operational amplifier section (amplification section of the receiver section)
3: Second op-amp section (transmitter section amplification section)
4: attenuator
70: Audio processor unit

Claims (3)

A ring detector unit for detecting a ring signal of the PSTN, a PSTN line coupling unit composed of a call current coupling unit and an AC input coupling unit in a DC LOOP unit of the PSTN, an audio amplifier unit, an audio processor unit, In the system,
An attenuation unit for attenuating the audio signal of the transmitter unit and the receiver unit to adjust the audio signal to an appropriate level;
A first operational amplifier unit for amplifying an audio signal of the receiver unit attenuated through the attenuation unit; And
And a second operational amplifier unit for amplifying an audio signal of a transmission unit attenuated through the attenuation unit,
The attenuator is an IC that attenuates the level of the transmitted and received sounds. The IC attenuates the volume by 1 dB / step from 0 to -79 dB,
And a feedback circuit connected to the matching transformer and including a feedback circuit and a filter circuit for preventing a loss of a volume caused by the impedance and a distortion caused by the impedance while the input terminal and the output terminal of the receiving unit are connected to the matching transformer. This is a possible audio system. delete delete

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