High performance digit mandarin speech recognition

High-performance mandarin digit speech recognition (MDSR) system is developed using MFCC (Mel frequency cepstrum coefficient) as the main parameter identifying the speech patterns. The formant trajectory and the nasal feature are extracted to identify confused words. A feature-based, real-time endpoint detection algorithm is proposed to reduce the system resource requirements and to improve the disturbance-proof ability. A two-stage recognition frame enhances discrimination by identifying candidate words in the first stage and confused word pairs in the second stage. These improvements result in a correct recognition rate of 98.8%.