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Acoustic energy comparison control method and system based on minimum mean square error criterion

A mean square error and contrast control technology, applied in the field of acoustics, can solve the problems of sound quality and broadband contrast focusing ability degradation, and achieve the effect of good private listening space, easy real-time realization, and simple calculation

Active Publication Date: 2017-09-26
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to overcome the sound quality and broadband contrast focusing ability degradation problems existing in the sound energy contrast control method in the prior art, thereby providing a method that can effectively improve sound quality and broadband contrast focusing ability

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  • Acoustic energy comparison control method and system based on minimum mean square error criterion
  • Acoustic energy comparison control method and system based on minimum mean square error criterion
  • Acoustic energy comparison control method and system based on minimum mean square error criterion

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Embodiment Construction

[0061] The present invention will be further described now in conjunction with accompanying drawing.

[0062] The basic idea of ​​the present invention is to utilize the minimum criterion of design mean square error and preset the target vector, so that the frequency response of the control point in the bright area is close to the frequency response of the ideal Dirac-delta impulse function, so that the acoustic energy contrast control method of the present invention Improves sound quality in the bright zone, while improving contrast focus at non-selected frequencies. The invention eliminates the problems of tailing of the impulse response waveform in the bright zone and sharp drop of focus ability at non-selected frequency points existing in the acoustic energy control method in the prior art.

[0063] Such as image 3 Shown, method of the present invention comprises the following steps:

[0064] Step 1), laying out the loudspeaker array, setting the control points of the b...

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Abstract

The invention relates to a sound energy contrast control method based on the minimum mean square error criterion, comprising: arranging a loudspeaker array, setting control points for bright areas and dark areas; calculating input complex weight coefficients of the loudspeaker array at a series of frequency points respectively Vector; set the target vector on each frequency point, adjust the amplitude and phase of the input complex weight coefficient vector on each frequency point respectively according to the minimum mean square error criterion; respectively adjust the complex weight coefficient of each speaker channel on a series of frequency points A frequency response is formed, and the frequency response is windowed and inverse Fourier transformed to obtain a time-domain impulse response signal of each loudspeaker channel.

Description

technical field [0001] The invention relates to the field of acoustics, in particular to a sound energy contrast control method and system based on the minimum mean square error criterion. Background technique [0002] Acoustic energy contrast control methods are widely used in personal audio systems such as televisions, computers, and mobile phones. The sound energy contrast control method can gather most of the sound energy around the user (bright area) without disturbing other users (dark area), thereby creating a personalized listening space for users and improving the quality of life. [0003] The specific implementation steps of the acoustic energy contrast control method in the prior art are as follows: [0004] (1) Determine the positions of the loudspeaker array, the control points of the bright zone and the dark zone; [0005] (2) Determine the frequency point f, and obtain the transfer function matrix G at the frequency f of the control points of the loudspeaker...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R1/32
Inventor 蔡野锋吴鸣杨军
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI