@techreport{oai:ipsj.ixsq.nii.ac.jp:00037574,
 author = {池沢, 龍 and 中村, 章 and 清山, 信正 and 都木徹 and 宮坂, 栄一 and Ryou, Ikezawa and Akira, Nakamura and Nobumasa, Seiyama and Tohru, Takagi and Eiichi, Miyasaka},
 issue = {69(1992-HI-044)},
 month = {Sep},
 note = {話速変換システムにおいて話速（話す速さ）を遅くする際，発話時間が伸張し，必然的に実時間に発声される時間との「ずれ」が問題となる．これを解決するために，文章間の無音区間を聴感上，違和感なく最短に短縮し，かつ，話速を固定ではなく，ピッチの大まかな変化に追随するよう，声立てと次の声立ての区間を単位にして，この区間の開始点では話速を遅くし，終了点に向かって徐々に話速を速める手法を開発した．これにより，発話時間を原音声の発話時間に保ったまま，聴きやすいゆっくりした音声に変換することが可能となった．, Only voice speed can be made slower than normal at a constant rate with other features (such as pitch, personality ) held original in the voice speed converting system which has recently been developed by NHK. This constant conversion in speed causes temporal enlargement of speech lengths. This paper presents a new algorithm to absorb temporal discrepancy in length between the converted speech and the original one, no matter how the processed speech can perceptually sound slower. The algorithm has two characteristic features; (1) Every long pause between adjacent uttered sentences is shortened with perceptual naturalness. (2) Voice speed set to be slow at the onset of voicing is made faster step by step roughly along a curve of the envelope of pitch frequencies, resulting in a value of speed faster than normal.},
 title = {話速変換に伴う時間伸張を吸収するための一方法},
 year = {1992}
}