Hiromitsu NISHIZAKI


Re-Ranking Approach of Spoken Term Detection Using Conditional Random Fields-Based Triphone Detection
Naoki SAWADA Hiromitsu NISHIZAKI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2016/10/01
Vol. E99-D  No. 10  pp. 2518-2527
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Machine Learning for Spoken Language Processing)
Category: Spoken term detection
Keyword: 
conditional random fieldsphoneme-to-phoneme confusion learningre-rankingspoken term detectiontriphone detection
 Summary | Full Text:PDF(1.7MB)

Spoken Term Detection Using SVM-Based Classifier Trained with Pre-Indexed Keywords
Kentaro DOMOTO Takehito UTSURO Naoki SAWADA Hiromitsu NISHIZAKI 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2016/10/01
Vol. E99-D  No. 10  pp. 2528-2538
Type of Manuscript:  Special Section PAPER (Special Section on Recent Advances in Machine Learning for Spoken Language Processing)
Category: Spoken term detection
Keyword: 
decision processpre-indexingspoken term detectionsupport vector machineverification
 Summary | Full Text:PDF(1.7MB)

An Unsupervised Speaker Adaptation Method for Lecture-Style Spontaneous Speech Recognition Using Multiple Recognition Systems
Seiichi NAKAGAWA Tomohiro WATANABE Hiromitsu NISHIZAKI Takehito UTSURO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/03/01
Vol. E88-D  No. 3  pp. 463-471
Type of Manuscript:  Special Section PAPER (Special Section on Corpus-Based Speech Technologies)
Category: Spoken Language Systems
Keyword: 
spontaneous speech recognitionunsupervised speaker adaptationconfidence measuremultiple LVCSR models
 Summary | Full Text:PDF(641KB)

Improving Keyword Recognition of Spoken Queries by Combining Multiple Speech Recognizer's Outputs for Speech-driven WEB Retrieval Task
Masahiko MATSUSHITA Hiromitsu NISHIZAKI Takehito UTSURO Seiichi NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2005/03/01
Vol. E88-D  No. 3  pp. 472-480
Type of Manuscript:  Special Section PAPER (Special Section on Corpus-Based Speech Technologies)
Category: Spoken Language Systems
Keyword: 
speech recognitionmachine learningmultiple LVCSR modelsWEB retrieval
 Summary | Full Text:PDF(1.7MB)