Dialog System based on Speech Recognition for the Elderly with Dementia

음성인식에 기초한 치매환자 노인을 위한 대화시스템

  • Published : 2002.10.01

Abstract

This study aims at developing dialog system to improve the quality of life of the elderly with a dementia. The proposed system mainly consists of three modules including speech recognition, automatic search of the time-sorted dialog database, and agreeable responses with the recorded voices of caregivers. For the first step, the dialog that dementia patients often utter at a nursing home is first investigated. Next, the system is organized to recognize the utterances in order to meet their requests or demands. The system is then responded with recorded voices of professional caregivers. For evaluation of the system, the comparison study was carried out when the system was introduced or not, respectively. The occupational therapists then evaluated a male subjects reaction to the system by photographing his behaviors. The evaluation results showed that the dialog system was more responsive in catering to the needs of dementia patient than professional caregivers. Moreover, the proposed system led the patient to talk more than caregivers did in mutual communication.

본 연구는 치매노인환자의 생활의 질을 향상시키기 위한 대화시스템의 개발에 목표를 둔다. 제안된 시스템은 주로 세 가지 모듈, 즉, 음성인식, 시간테이블에 의해 구분된 대화 데이터베이스의 자동검색, 그리고 간호사의 녹음음성으로 이루어진 맞장구 등의 긍정적인 대답, 등으로 구성되어 있다. 첫 단계로서, 치매환자가 간호시설에서 자주 발화하는 대화의 내용을 조사하였다. 다음으로, 환자들의 요구를 충족시키기 위해 그들의 발화 음성을 자동인식 하도록 구성하였다. 여기서 시스템의 응답은 전문 간호사의 녹음음성으로 설계되었다. 시스템의 평가를 위해서 시스템이 도입되었을 때와 되지 않았을 때의 비교연구를 실시하였고, 치료 전문가(occupational therapist)들이 비디오 촬영을 통해서 남성 대상자의 반응을 평가하였다. 평가 견과는 치매환자의 요구를 충족시키는데 있어서 대화 시스템이 전문간호사들보다 더욱 답적이었다는 것을 보여준다. 게다가 제안된 시스템은 상호 대화에 있어서 간호사들보다 환자가 더 많이 말하도록 유도함을 알 수 있었다.

Keywords

References

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