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Browsing 国際会議発表論文 / Proceedings by Author "Akinobu Lee"

Browsing 国際会議発表論文 / Proceedings by Author "Akinobu Lee"

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  • Panikos Heracleous; Yoshitaka Nakajima; Akinobu Lee; Hiroshi Saruwatari; Kiyohiro Shikano (IEEE, 2003-11)
    In previous works, we introduced a special device (Non-Audible Murmur (NATM) microphone) able to detect very quietly uttered speech (murmur), which cannot be heard by listeners near the talker. Experimental results showed ...
  • Ryuichi Nisimura; Takashi Uchida; Akinobu Lee; Hiroshi Saruwatari; Kiyohiro Shikano; Yoshio Matsumoto (IEEE, 2002-10)
    We implemented a humanoid robot, ASKA, in our university reception desk for the computerized university guidance. ASKA can recognize a user's question utterance, and answer the user's question by its text-to-speech voice, ...
  • Panikos Heracleous; Yoshitaka Nakajima; Akinobu Lee; Hiroshi Saruwatari; Kiyohiro Shikano (EURASIP, 2004-09)
    In this paper, we present audible (normal) speech and inaudible murmur hidden Markov models based automatic speech recognition using NAM microphone. The NAM (Non-Audible Murmur) microphone is a special device, which can ...
  • Ryuichi Nishimura; Kumiko Komatsu; Yuka Kuroda; Kentaro Nagatomo; Akinobu Lee; Hiroshi Saruwatari; Kiyohiro Shikano (2001-09)
    This paper describes an automatic building of N-gram language models from Web texts for large vocabulary continuous speech recognition. Although a huge amount of well-formed texts are needed to train a model, collecting ...
  • Tatsuya Kawahara; Akinobu Lee; Tetsunori Kobayashi; Kazuya Takeda; Nobuaki Minematsu; Katsunobu Itou; Akinori Ito; Mikio Yamamoto;Atsushi Yamada; Takehito Utsuro; Kiyohiro Shikano (1998-05)
    In this paper we present the first public Japanese speech corpus for large vocabulary continuous speech recognition (LVCSR) technology, which we have titled JNAS (Japanese Newspaper Article Sentences). We designed it to ...
  • Akinobu Lee; Tatsuya Kawahara; Kazuya Takeda; Masato Mimura; Atsushi Yamada; Akinori Ito; Katsunobu Itou; Kiyohiro Shikano (2002-05)
    Continuous Speech Recognition Consortium (CSRC) was founded on 2000 to promote sharable high-quality platform for research and development of speech recognition. It is a continued work of the former Japanese Dictation ...
  • Akira Baba; Shinichi Yoshizawa; Miichi Yamada; Akinobu Lee; Kiyohiro Shikano (2001-09)
    In this paper, we evaluate elderly speaker acoustic models in LVCSR, which are trained by the 301 elderly speakers' database from the age of 60 to 90. Each speaker utters 200 sentences. The elderly speaker PTM (Phonetic ...
  • Nobuo Hataoka; Hiroaki Kokubo; Akinobu Lee; Tatsuya Kawahara; Kiyohiro Shikano (IEEE, 2006-12)
    In this paper, we report implemental results of an embedded version of Julius. We used T-Enginetrade as a hardware platform which has a SuperH microprocessor. The Julius is free and open continuous speech recognition (CSR) ...
  • Hiroaki Kokubo; Nobuo Hataoka; Akinobu Lee; Tatsuya Kawahara; Kiyohiro Shikano (IEEE, 2006-10)
    To expand CSR (continuous speech recognition) software to the mobile environmental use, we have developed embedded version of "Julius". Julius is open source CSR software, and has been used by many researchers and developers ...
  • Shinichi Yoshizawa; Akira Baba; Kanako Matsunami; Yuichiro Mera; Miichi Yamada; Akinobu Lee; Kiyohiro Shikano (2001-09)
    This paper describes an efficient method of unsupervised speaker adaptation. This method is based on (1) selecting a subset of speakers who are acoustically close to a test speaker, and (2) calculating adapted model ...
  • Tatsuya Kawahara; Akinobu Lee; Tetsunori Kobayashi; Kazuya Takeda; Nobuaki Minematsu; Shigeki Sagayama; Katsunobu Itou; Akinori Ito; Mikio Yamamoto; Atsushi Yamada; Takehito Utsuro; Kiyohiro Shikano (2000-10)
    A sharable software repository for Japanese LVCSR (Large Vocabulary Continuous Speech Recognition) is introduced. It is designed as a baseline platform for research and developed by researchers of different academic ...
  • Akinobu Lee; Tatsuya Kawahara; Kiyohiro Shikano (IEEE, 2001-05)
    We address a method to efficiently select Gaussian mixtures for fast acoustic likelihood computation. It makes use of context-independent models for selection and back-off of corresponding triphone models. Specifically, ...
  • Katsunobu Itou; Kiyohiro Shikano; Tatsuya Kawahara; Kasuya Takeda; Atsushi Yamada; Akinori Itou; Takehito Utsuro; Tetsunori Kobayashi; Nobuaki Minematsu; Mikio Yamamoto; Shigeki Sagayama; Akinobu Lee (2000-05)
    Large vocabulary continuous speech recognition (LVCSR) is an important basis for the application development of speech recognition technology. We had constructed Japanese common LVCSR speech database and have been developing ...
  • Akinobu Lee; Tatsuya Kawahara; Kiyohiro Shikano (2001-09)
    Julius is a high-performance, two-pass LVCSR decoder for researchers and developers. Based on word 3-gram and context-dependent HMM, it can perform almost real-time decoding on most current PCs in 20k word dictation task. ...
  • Akinobu Lee; Tatsuya Kawahara; Kazuya Takeda; Kiyohiro Shikano (IEEE, 2000-06)
    A phonetic tied-mixture (PTM) model for efficient large vocabulary continuous speech recognition is presented. It is synthesized from context-independent phone models with 64 mixture components per state by assigning ...
  • Akinobu Lee; Keisuke Nakamura; Ryuichi Nisimura; Hiroshi Saruwatari; Kiyohiro Shikano (2004-10)
    To realize a robust spoken dialogue system for use in a real environment, the robust rejection of unintended inputs such as laughter, coughing, background speech and other noise based on GMM is implemented and examined on ...
  • Yasuaki Ohashi; Tsuyoki Nishikawa; Hiroshi Saruwatari; Akinobu Lee; Kiyohiro Shikano (IEEE, 2005-05)
    We propose a spatial subtraction array (SSA) and known noise superimposition to achieve a robust hands-free speech recognition under noisy environments. In the proposed SSA, noise reduction is achieved by subtracting the ...
  • Yasuaki Ohashi; Tsuyoki Nishikawa; Hiroshi Saruwatari; Akinobu Lee; Kiyohiro Shikano (IEEE, 2005-08)
    We propose a spatial subtraction array (SSA) and known noise superimposition to achieve a noise-robust hands-free speech recognition which can be used in human-robot interaction. In the proposed SSA, noise reduction is ...
  • Panikos Heracleous; Yoshitaka Nakajima; Akinobu Lee; Hiroshi Saruwatari; Kiyohiro Shikano (2004-10)
    In this paper, we introduce the Stethoscopic Non-Audible Murmur (NAM) microphone, and we focus on its application in automatic speech recognition systems. The NAM microphone is attached behind the talker's ear, and can ...
  • Ryuichi Nisimura; Akinobu Lee; Masashi Yamada; Kiyohiro Shikano (2005-09)
    Takemaru-kun system is a practical speech-oriented guidance system developed to examine spoken interface through long-term operation in a public place that collected natural human-machine interaction data. In (2)004 the ...

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