CAJ | 학술논문

为提高语音通信干扰效果客观评估中标准语音文件和受扰语音文件的同步精度,对军标GJB4405A-2006中规定的标准语音文件增设了高低频交叉的双音频同步头;介绍了小波消噪的原理,利用2层sym小波对受扰语音文件进行了消噪处理,将同步头中的高频信号作为噪声进行大幅削弱;设计了基于幅度比较的同步算法,找出同步基准点,并对20组受扰严重的语音文件的进行了仿真测试,仿真结果证明了该方法得到的同步精度符合后续数据处理的要求。
위제고어음통신간우효과객관평고중표준어음문건화수우어음문건적동보정도,대군표GJB4405A-2006중규정적표준어음문건증설료고저빈교차적쌍음빈동보두;개소료소파소조적원리,이용2층sym소파대수우어음문건진행료소조처리,장동보두중적고빈신호작위조성진행대폭삭약;설계료기우폭도비교적동보산법,조출동보기준점,병대20조수우엄중적어음문건적진행료방진측시,방진결과증명료해방법득도적동보정도부합후속수거처리적요구。
To enhance the synchronization accuracy of standard speech file and jammed speech file in the evaluation of speech jamming effect, a dual-frequency synchronization head with a high frequency and a low frequency appearing alternately is added to the standard speech file as prescribed by GJB4405A-2006. The theory of wavelet denoising is introduced, and the Sym2 wavelet is used to denoise the jammed speech file, which weakens the high frequency signal greatly as noise. A synchronization algorithm is designed based on comparing the amplitudes to find the synchronization reference point. 20 jammed speech files are tested by this method, and the results prove that the synchronization accuracy meets the requirement of follow-up data processing.