Research and development of robust speech recognition

Kiyoaki Aikawa
1998 Journal of the Acoustical Society of America  
This paper describes recent research and development activities on robust ASR (automatic speech recognition) in NTT Human Interface Laboratories. ASR system design has been changing from the experimental to the commercial level. A relevant issue in achieving practical ASR is robustness against environmental noise and speaker/circuit differences. Adaptation techniques have been widely investigated for improving the robustness. Real time speaker/noise tiaptation is getting more and more popular.
more » ... and more popular. Confidence measures are also effective in enhancing speech recognition performance by rejecting outof-vocabulary words, lip and breath noises. Another relevant issue is how to quickly reach the goal of human-machine dialogue via the telephone without visual information.
doi:10.1121/1.421586 fatcat:c7b5lxorwngxljkzcskshghkiq