@article{oai:sucra.repo.nii.ac.jp:00012513,
 author = {長谷川, 孝明},
 issue = {1},
 journal = {IEEE Journal of Selected Area in Communications},
 month = {},
 note = {In this paper, we propose a new speech communication system to convert oral motion images into speech. We call this system "The Image Input Microphone." It provides high security and is not affected by acoustic noise because it is not necessary to input the actual utterance. This system is especially promising as a speaking-aid system for people whose vocal cords are injured. Since this is a basic investigation of media conversion from image to speech, we focus on vowels, and conduct experiments on media conversion of vowels. The vocal-tract transfer function and the source signal for driving this filter are estimated from features of the lips. These features are extracted from oral images in a learning data set, then speech is synthesized by this filter inputted with an appropriate driving signal. The performance of this system is evaluated by hearing tests of synthesized speech. The mean recognition rate for the test data set was 76.8%. We also investigate the effects of practice by iterative listening. The mean recognition rate rises from 69.4% to over 90% after four tests over four days. Consequently, we conclude the proposed system has potential as a method of nonacoustic communication., (c)1995 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE., text, application/pdf},
 pages = {42--48},
 title = {The Image Input Microphone : A New Non-acoustic Speech Communication System by Media Conversion from Oral Motion Images to Speech},
 volume = {13},
 year = {1995},
 yomi = {ハセガワ, タカアキ}
}