异质信号干扰下DRA多声道数字音频信号加权融合方法研究

DRA多声道数字音频信号容易受到异质信号的干扰,导致音频信号中的无用信息增多,音频质量下降。提出一种新的异质信号干扰下DRA多声道数字音频信号加权融合方法,设计了一种采集系统同时采集DRA多声道数字音频信号,将获取的信号在DSP中进行加权融合处理,利用A/D转换芯片进行转换。介绍了DRA多声道数字音频信号加权融合原理,在将采集信号传输至融合中心前对其进行量化处理,结合量化过程的统计特性对加权系数进行推导,依据加权系数设计融合函数,使融合函数和有用DRA多声道数字音频信号在统计意义上最大程度的吻合,从而实现音频信号的加权融合。实验结果表明,所提方法能够有效实现DRA多声道数字音频信号的加权融合,在不同信噪比下均能保持较低的均方根误差,加权融合精度较高。

Heterogeneous signal interference on DRA multichannel digital audio signal weighted fusion method under study

Vulnerable to heterogeneous on DRA multichannel digital audio signal interference, lead to the useless information in the audio signal, the audio quality decline.Put forward A new heterogeneous signal interference on DRA multichannel digital audio signal under weighted fusion method, designed A collection system acquisition on DRA multichannel digital audio signals at the same time, will get the signal in the DSP weighted fusion processing, the use of A/D conversion chip for conversion.Introduced on DRA multichannel digital audio signal weighted fusion principle, before the acquisition signal transmission to the fusion center for quantitative processing, combined with the quantitative statistical properties of the process of the weighting coefficient is derived, based on the weighted coefficient of design integration function, make the fusion function and useful on DRA multichannel digital audio signal in statistical sense, to a great extent so as to realize the weighted fusion of audio signal.The experimental results show that the proposed method can achieve effective on DRA weighted fusion of multichannel digital audio signal under different signal-to-noise ratio can keep lower root mean square error, high precision weighted fusion.