电子科技
電子科技
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IT AGE
2012年
1期
13-15,19
,共4页
端点检测%语音信号处理%短时能量%过零率%双门限法
耑點檢測%語音信號處理%短時能量%過零率%雙門限法
단점검측%어음신호처리%단시능량%과령솔%쌍문한법
endpoint detection%speech signal processing%short-term energy%zero crossing rate%dual-threshold
端点检测是语音信号处理过程中的重要步骤,其准确性直接影响语音信号处理的速度和结果。因此对于端点检测方法,特别是在噪声环境下的端点检测研究,一直是语音信号处理中的热点。文中针对声纹识别系统所作的端点检测前端处理,对比了利用短时能量和短时平均过零率进行端点检测的方法,运用Matlab实现了双门限法端点检测的编程和仿真。仿真结果表明,端点检测准确时识别率为93%。
耑點檢測是語音信號處理過程中的重要步驟,其準確性直接影響語音信號處理的速度和結果。因此對于耑點檢測方法,特彆是在譟聲環境下的耑點檢測研究,一直是語音信號處理中的熱點。文中針對聲紋識彆繫統所作的耑點檢測前耑處理,對比瞭利用短時能量和短時平均過零率進行耑點檢測的方法,運用Matlab實現瞭雙門限法耑點檢測的編程和倣真。倣真結果錶明,耑點檢測準確時識彆率為93%。
단점검측시어음신호처리과정중적중요보취,기준학성직접영향어음신호처리적속도화결과。인차대우단점검측방법,특별시재조성배경하적단점검측연구,일직시어음신호처리중적열점。문중침대성문식별계통소작적단점검측전단처리,대비료이용단시능량화단시평균과령솔진행단점검측적방법,운용Matlab실현료쌍문한법단점검측적편정화방진。방진결과표명,단점검측준학시식별솔위93%。
Endpoint detection of speech signal processing is a very important step, which directly affects the accura- cy of the speed and results in voice signal processing. The research on endpoint detection, especially in noisy environ- ments, has always been the hot spots in voice signal processing. Aiming at the front-end detection, which is made for the voice recognition system, this paper compares the use of short-term energy with the use of short-term average zero-crossing rate for endpoint detection. It achieves a double-threshold method of endpoint detection programming and simulation by Matlab. Simulation results show that an accuracv of as high as 93% for endDoint detection can be achieved.