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Time domain sound energy contrast control method and system

A technology of contrast control and sound energy, applied in the field of acoustics, can solve the problems of sound quality and broadband contrast focusing ability decline

Active Publication Date: 2014-07-09
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0007] The purpose of the present invention is to overcome the problem of sound quality and broadband contrast focusing ability degradation in the sound energy contrast control method in the prior art, thereby providing a time-domain sound energy contrast control method that can improve its sound quality and broadband contrast focusing ability

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  • Time domain sound energy contrast control method and system
  • Time domain sound energy contrast control method and system
  • Time domain sound energy contrast control method and system

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Embodiment Construction

[0076] The present invention will be further described now in conjunction with accompanying drawing.

[0077] The basic idea of ​​the present invention is to design directly in the time domain, and use the frequency consistency constraints to improve the frequency response flatness of the control point in the bright area, so that the sound energy contrast control method can improve the sound quality in the bright area, and at the same time increase the bandwidth. Contrasting focusing capabilities of the signal. The method of the present invention designed based on the above ideas eliminates the problems of sound quality degradation and broadband signal focusing ability degradation in the acoustic energy control method in the prior art.

[0078] refer to figure 1 , the time-domain sound energy contrast control method based on the frequency response consistency constraint of the present invention comprises the following steps:

[0079] Step 1), laying out the loudspeaker array...

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Abstract

The invention relates to a time domain sound energy contrast control method. The time domain sound energy contrast control method comprises the steps that a loud speaker array is arranged and control points of a bright area and control points of a dark area are set, wherein the bright area refers to the area set to have high sound energy and the dark area refers to the area set to have low sound energy; a reference frequency is selected and a frequency response uniformity constraint expression in the bright area is listed; an average sound energy expression of the bright area and an average sound energy expression of the dark area are listed respectively; time domain impulse response filter signals of all channels are worked out by combining the frequency response uniformity constraint expression and the average sound energy expressions and according to the time domain sound energy contrast control criteria of frequency response uniformity constraints.

Description

technical field [0001] The invention relates to the field of acoustics, in particular to a time-domain sound energy contrast control method and system. 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] Acoustic energy contrast control methods in the prior art are mainly divided into two categories: frequency domain design and time domain design. Both the frequency domain acoustic energy contrast control method and the time domain acoustic energy contrast control method have their own defects. [0004] (1) The frequency-domain acoustic energy comparison control method in the prior art usually only calculates the o...

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Application Information

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IPC IPC(8): H04S7/00H04S3/00
Inventor 蔡野锋吴鸣杨军
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI