Recognition of Putonghua voiceless stop like initials based on speech main periods

I.Intr0ductionNowadays,thereismuchadvancemcntinthcrcsearchintospeechrecognition.Manyresearchershavebecninterestedintheimplementationofareliab1crealtimerec-ognitionsystemofunlimitedv0cabu1ary.Thercareafewproductsconversingsyl1ablesintoChinesecharactersinthemarket.However,theimp1ementationofarobustrealtAnerecognitionsystemofunlimitcdvocabularyisvcrydifficu1t,anditisthcgreataimofourresearch.WehaveaTMS32O-C25signa1processingboardattachedtoacomputerofthM-PC/AT80386.Wehopcthatourspeechrecognit…

Recognition of Putonghua voiceless stop like initials based on speech main periods

The zero-crossing rate is an important feature in the recognition of speech. However, the feature is not very reliable in the computation. A method of conversion of the zero-crosssing rate into the main period and recognition of Putonghua initials by HMM based on the main period are proposed in this paper. The study of on-line recognition of aspirate voiceless stop consonants P, T and K, unaspirate affricative consonants ZH, Z and fricative consonant H of Chinese based on the new method has been made and we obtained 78 percent of the correct recognition rate for the initials. The implementation technique of the new method and the experiment of the initial recognition are described in the paper.