Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Alternative Speech Communication System for Persons with Severe Speech Disord | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2009 Article ID 540409 12 pages doi 2009 540409 Research Article Alternative Speech Communication System for Persons with Severe Speech Disorders Sid-Ahmed Selouani 1 Mohammed Sidi Yakoub 2 and Douglas O Shaughnessy EURASIP Member 2 1 LARIHS Laboratory Universite de Moncton Campus de Shippagan NB Canada E8S 1P6 2INRS-Energie-Materiaux-Telecommunications Place Bonaventure Montreal QC Canada H5A 1K6 Correspondence should be addressed to Sid-Ahmed Selouani selouani@ Received 9 November 2008 Revised 28 February 2009 Accepted 14 April 2009 Recommended by Juan I. Godino-Llorente Assistive speech-enabled systems are proposed to help both French and English speaking persons with various speech disorders. The proposed assistive systems use automatic speech recognition ASR and speech synthesis in order to enhance the quality of communication. These systems aim at improving the intelligibility of pathologic speech making it as natural as possible and close to the original voice of the speaker. The resynthesized utterances use new basic units a new concatenating algorithm and a grafting technique to correct the poorly pronounced phonemes. The ASR responses are uttered by the new speech synthesis system in order to convey an intelligible message to listeners. Experiments involving four American speakers with severe dysarthria and two Acadian French speakers with sound substitution disorders SSDs are carried out to demonstrate the efficiency of the proposed methods. An improvement of the Perceptual Evaluation of the Speech Quality PESQ value of 5 and more than 20 is achieved by the speech synthesis systems that deal with SSD and dysarthria respectively. Copyright 2009 Sid-Ahmed Selouani et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original .