Automatic gain control method for audio signal and apparatus thereof

An automatic gain control, gain control technology, applied in gain control, amplification control, speech analysis, etc., can solve problems such as drop, signal-to-noise ratio change, harmonic distortion, etc.
CN101110217AInactive Publication Date: 2008-01-23VIMICRO CORP
0 Cites 19 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
VIMICRO CORP
Publication Date
2008-01-23
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an automatic gain control method for audio frequency, which presets the initial gain value. The method comprises: check whether the present frame input signal is mute frame signal; if it is a mute frame signal, directly output the present frame input signal; otherwise, process the present frame input signal in an amplification gain device and then output it. Besides, the invention also discloses an automatic gain control device for audio signal. The method and device disclosed in the invention, which do not amplify the background noise and do not produce signal distortion, are able to realize the automatic control of output power in hearing aid under the condition of ensuring the speech resolution ability.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of hearing aids, in particular to an automatic gain control method and device for audio signals. Background technique

[0002] In the field of amplification and processing of audio signals, such as the field of hearing aids designed for deaf patients, the hearing loss of deaf patients is different than that of normal people, and the loss of different frequency bands is different. As shown in FIG. 1(a) and FIG. 1(b), FIG. 1(a) shows the hearing curve of a normal person, and FIG. 1(b) shows the hearing curve of a deaf patient. Among them, the hearing loss in the low-frequency part is small, and the hearing loss in the high-frequency part is large. Therefore, the hearing loss compensation of the hearing aid is to independently amplify the signals of each frequency band according to the hearing curve of the deaf patient, so as to amplify to the extent that the patient can perceive, thereby improving the patient's hearing...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More