Title:
音声認識装置及び方法、並びにプログラム
Document Type and Number:
Japanese Patent JP4604424
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the precision of speech recognition by removing noise showing high likelihood as a result of speech recognition. SOLUTION: An inputted speech is sectioned into frames having specific time intervals and power component of the respective frames are found. A speech section is extracted according to the values of the power components and speech features of the respective speech sections are extracted. According to the speech features of the respective speech sections and a prepared hidden Markov phoneme model, the word having the highest likelihood among words contained in a word dictionary is extracted as a candidate. According to the acquired likelihood, maximum likelihood, and minimum likelihood of each frame, a likelihood reliability rate is found and compared with a previously set threshold. When the likelihood reliability rate exceeds the threshold, the vowel rate in the extracted speech section is found and then compared with a previously set threshold. When a vowel rate exceeds the threshold, the word as the candidate is outputted as a speech recognition result, but when the likelihood reliability rate or the vowel rate is less than each threshold, the word as the candidate is discarded.
More Like This:
| JPH03291700 | CONFIGURATION OF VOICE RECOGNIZING DEVICE |
| JP2648779 | [Title of Invention] Call signal identification device |
| JPH08160987 | SPEECH RECOGNITION DEVICE |
Inventors:
Shigeru Kafuku
Application Number:
JP2001239710A
Publication Date:
January 05, 2011
Filing Date:
August 07, 2001
Export Citation:
Assignee:
CASIO COMPUTER CO.,LTD.
International Classes:
G10L15/08; G10L15/28; G10L15/04; G10L15/32
Domestic Patent References:
| JP1185599A | ||||
| JP11085189A | ||||
| JP58224396A | ||||
| JP5249987A | ||||
| JP2293798A | ||||
| JP61219099A |
Other References:
石田明 他,"実環境下での音声/非音声の判別",日本音響学会誌,1991年12月 1日,Vol.47,No.12,p.911-917
谷口信介 他,"カーナビ応用を目指した頑強な耐雑音認識方式 -音響モデルの出現確率に基づく音声/雑音判定-" ,電子情報通信学会技術研究報告,2001年 6月21日,Vol.101,No.155,p.15-20
谷口信介 他,"カーナビ応用を目指した頑強な耐雑音認識方式 -音響モデルの出現確率に基づく音声/雑音判定-" ,電子情報通信学会技術研究報告,2001年 6月21日,Vol.101,No.155,p.15-20
Attorney, Agent or Firm:
Kimura Mitsuru