Second International Conference on Spoken Language Processing (ICSLP'92)

Banff, Alberta, Canada
October 13-16, 1992

Hardware Implementation of Realtime 1000-Word HMM-LR Continuous Speech Recognition

Akito Nagai (1), Kenji Kita (1), Toshiyuki Hanazawa (2), Tadashi Suzuki (2), Tomohiro Iwasaki (2), Tsuyoshi Kawabata (3), Kunio Nakajima (2), Kiyohiro Shikano (3), Tsuyoshi Morimoto (1), Shigeki Sagayama (1), Akira Kurematsu (1)

(1) ATR Interpreting Telephony Research Laboratories, Kyoto, Japan; (2) Mitsubishi Electric Corporation; (3) NTT Basic Research Laboratories; (4) NTT Human Interface Laboratories, Japan

This paper describes the design and development of the architecture of dedicated hardware which recognizes continuous speech sentences using a 1000-word vocabulary. It is based on the HMM-LR mechanism, which is an integration system of speech recognition and language analysis. Many real-time techniques using 33 DSPs for multi-processing were developed for the heavy computation of the trellis algorithms and state duration control. The paper gives performance data with results within a pipeline delay of approximately 2 or 3 seconds, independently of the length of the sentence.

Full Paper

Bibliographic reference.  Nagai, Akito / Kita, Kenji / Hanazawa, Toshiyuki / Suzuki, Tadashi / Iwasaki, Tomohiro / Kawabata, Tsuyoshi / Nakajima, Kunio / Shikano, Kiyohiro / Morimoto, Tsuyoshi / Sagayama, Shigeki / Kurematsu, Akira (1992): "Hardware implementation of realtime 1000-word HMM-LR continuous speech recognition", In ICSLP-1992, 237-240.