Gain automatic control device, method and audio processing device and earphone thereof

A technology of automatic gain control and earphones, applied in the direction of gain control, amplification control, electrical components, etc., can solve problems such as complex structure, achieve less hardware structure, avoid excessive output sound volume, and protect hearing

Inactive Publication Date: 2007-11-14
郓城县三奇尔食品有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above technology achieves the purpose of automatically controlling the signal gain, the structure is complicated

Method used

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  • Gain automatic control device, method and audio processing device and earphone thereof
  • Gain automatic control device, method and audio processing device and earphone thereof
  • Gain automatic control device, method and audio processing device and earphone thereof

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Embodiment Construction

[0018] As shown in FIG. 1 and FIG. 2 , two channels of audio signals enter a multiplexer 13 through input ports (including a first input terminal 10 a and a second input terminal 10 b ) of the automatic gain control device 1 . The multiplexer 13 has two output port groups 2 and 3 for transmitting two audio signals to an attenuation circuit 14 respectively. The attenuation circuit 14 has two attenuation branch groups 6 and 7 corresponding to the output port groups 2 and 3 of the multiplexer 13 respectively. The two audio signals are attenuated to a corresponding degree by the two attenuation branch groups 6 and 7 and then output to the output port (including a first output port 15 a and a second output port 15 b ) of the automatic gain control device 1 .

[0019] A signal sampling circuit 11 obtains the sampling signals of the output two-way audio signals from the first and second output terminals 15a, 15b and performs integral processing; an analog-to-digital converter 12 perf...

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PUM

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Abstract

The automatic gain control (AGC) device includes an input port and an output port, a multiway switch, an attenuator circuit, and an A / D converter. AGC can adjust outputted audio volume automatically in order to protect audition of user from harm. The invention also discloses audio process device containing AGC device, and earphone containing AGC device.

Description

technical field [0001] The invention relates to an automatic gain device and method, in particular to an automatic sound gain control device, which uses fewer hardware components and can automatically control the volume of a sound generator. Background technique [0002] Recently, MP3, Walkman and mobile phones are more and more widely used by people, but while listening to music and talking, our ears are also suffering from different degrees of damage. [0003] Therefore, an automatic gain control technology has emerged, which can control the volume of the sound output by the sound generating device to protect the user's hearing. Chinese patent No. 02119372 published on July 16, 2003 provides an automatic gain controller and its output control signal method, the automatic gain controller includes an estimator for estimating the level of the input signal; a subtraction a controller for calculating the difference between the level estimated by said estimator and a predetermi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03G3/20
Inventor 翁世芳庄宗仁李俊崔文剑张俊伟
Owner 郓城县三奇尔食品有限公司
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