Isostatic signal processing method for compensating small-space audition acoustical environment

A technology for equalizing signals and processing methods, applied in voice analysis, instruments, etc., can solve problems affecting the fidelity of music or AV programs, voice "sound coloring" distortion, etc., and achieve the effect of strong real-time performance and high flexibility

Inactive Publication Date: 2013-07-31
福建超智集团有限公司
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Problems solved by technology

[0004] To sum up, the biggest possible defect of the sound field of listening in a small space is the "sound coloration" distortion of the voice in the low frequency band. Once it occurs, it will affect the fidelity of important information in the low frequency band of music or AV programs, especially the voice.

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Embodiment Construction

[0027] In the embodiment of the present invention, the indoor shock response of the indoor acoustic environment must first be acquired y(n) and determine the room acoustic environment autoregressive AR Model (hereinafter referred to as: indoor acoustic environment AR model) order p , used to linearly predict the room acoustic environment AR model p order structure parameters.

[0028] In the discrete domain, the linear prediction is based on the time domain signal of the room shock response y(n) and y(n-1) , or even earlier values y(n-i), (i=2,3,...,q) The correlation proposed. Therefore, the y(n) Expressed as a linear combination of its previous data, that is

[0029]

[0030] This formula is called y of p order autoregressive forecasting model, e(n) is called the residual, for indoor acoustic environment AR Model p The first-order structure parameter, the main task of the linear prediction here is to obtain this parameter. AR model is a p order a...

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Abstract

The invention relates to an isostatic signal processing method for compensating a small-space audition acoustical environment. In order to realize indoor sound field signal processing based on a digital signal processing method, acquire playing signals for sound field isostatic compensation, and perform reverberation processing, the main technology namely the isostatic signal processing method comprises the following steps of: (1) correctly establishing key problems of an indoor autoregressive (AR) model, namely acquiring indoor response signals and selecting the order of the AR model; and (2) on the basis of a compensation algorithm structure of the model, realizing a reverberation processing method based on frequency response isostatic compensation. The equalizing signal processing method is different from an indoor sound field processing method of an indoor architectural acoustics design, and can be used for realizing corresponding sound field compensation processing for different acoustic rooms flexibly, and achieving different effects such as reverberation and the like according to different audition requirements.

Description

technical field [0001] The invention belongs to the indoor acoustic signal processing technology, and relates to a method for utilizing digital signal processing (DSP) indoor acoustic signals. Background technique [0002] The indoor acoustic signal used for listening includes two parts of the signal: one is the direct sound transmitted directly from the sound source to the receiving position, which attenuates as the transmission distance increases; the other is the standing wave of the indoor acoustic environment excited by the sound source, which is stable Distributed indoors. Standing waves in the acoustic environment directly affect the quality of listening. [0003] For the actual listening space, what is needed is an indoor sound field that meets the requirements. Concert halls and movie theaters are professional halls that people know, and they have been professionally designed for architectural acoustics. However, as people’s daily listening spaces are small spaces...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/02G10L19/005
Inventor 陈国钦詹仁辉
Owner 福建超智集团有限公司
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