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Audio processing method based on frequency domain adaptive equalization

An adaptive equalization and audio processing technology, applied in signal processing, transducer circuits, sensors, etc., can solve the problems of amplifying noise and background sound, long delay of controller solutions, and lack of audio detail processing.

Inactive Publication Date: 2018-10-19
CENT SOUTH UNIV
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Problems solved by technology

It is used to solve the problem of differences in audio processing effects of radio and television, and to improve the traditional audio equalizer based on biquad filter, which has the shortcomings of lack of audio detail processing, amplifying noise and background sound, and the delay of the controller solution is too long. It cannot be applied to real-time broadcasting to meet users' increasing demands for audio signal processing and listening experience

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  • Audio processing method based on frequency domain adaptive equalization
  • Audio processing method based on frequency domain adaptive equalization
  • Audio processing method based on frequency domain adaptive equalization

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] An example of the present invention is to use MATLAB to simulate the algorithm, input a section of audio recorded by a non-professional singer in the simulation, and perform frequency domain adaptive audio equalization processing on it.

[0024] according to figure 1 The block diagram of frequency-domain adaptive algorithm processing is shown, and the specific implementation steps are as follows:

[0025] Step A: Windowing

[0026] In order to improve the above situation, we introduce the window function. The window function w(t) is a function with an infinite frequency band, so even if the original signal is a limited-bandwidth signal, the segment obtained after being intercepted by the window function will become wireless bandwidth. After window function processing, the energy and distribution in the frequency domain are expanded, effectivel...

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Abstract

The invention provides an audio processing method based on frequency domain adaptive equalization. Defects in audio effects processing widely exist in domestic radio and television, auditory feeling of audiences watching television programs is influenced seriously, with starting of broadcasting of more and more high-definition channels, some high-definition television broadcast mechanisms completely have capabilities of making and broadcasting 5.1 surround sound programs already, at a terminal user home, television screen for watching the high-definition programs is bigger and bigger, images are sharper and sharper, moreover, a home theater system becomes an important tool for experiencing television surround sound day by day, and the users also have increasingly higher demands on accompanying sound of programs. The audio processing method based on frequency domain adaptive equalization can solve a problem of too long delay and coarse audio detail effects processing of an audio equalization scheme, moreover, background sound including noise of audio is not promoted, audio processing speed is fast, output audio is steady, equal and vivid, thus, the method can satisfy auditory perception need of people.

Description

technical field [0001] The invention belongs to the field of audio signal processing, and relates to an audio processing method for adaptive equalization in the frequency domain. Background technique [0002] With the development of social productive forces, everyone's leisure life is becoming more and more abundant. Listening to concerts, watching movies, and watching TV broadcasts have gradually become the favorite leisure methods of the public. In order to get a better listening experience, people have higher and higher requirements for sound quality. And it also has a wide range of applications in daily work and life, such as meeting rooms, international airports, transportation hubs and other venues. With the advancement of technology, the audio-visual industry and the IT industry are becoming more and more closely integrated. Digital audio processing technology has come a long way in the past 20 years. Digital audio processors play an important role in enhancing so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00
CPCH04R3/00H04R2430/00
Inventor 陈明义杨晓静王艳艳
Owner CENT SOUTH UNIV
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