Title:
SPEECH AND WORD RECOGNITION EQUIPMENT AND METHOD
Document Type and Number:
Japanese Patent JPS6035798
Kind Code:
A
Abstract:
Speaker-independent word recognition is performed, based on a small acoustically distinct vocabulary, with minimal hardware requirements. After a simple preconditioning filter, the zero crossing intervals of the input speech are measured and sorted by duration, to provide a rough measure of the frequency distribution within each input frame. The distribution of zero crossing intervals is transformed into a binary feature vector, which is compared with each reference template using a modified Hamming distance measure. A dynamic time warping algorithm is used to permit recognition of various speaker rates, and to economize on the reference template storage requirements. A mask vector with each reference vector on a template is used to ignore insignificant (or speaker-dependent) features of the words detected.
Inventors:
PERIAGARAMU KEI RAJIYASUEKARAN
JIYOOJI AARU DOTSUDEINTON
TOOMASU BII SHIYAAKU
JIYOOJI AARU DOTSUDEINTON
TOOMASU BII SHIYAAKU
Application Number:
JP7192884A
Publication Date:
February 23, 1985
Filing Date:
April 12, 1984
Export Citation:
Assignee:
TEXAS INSTRUMENTS INC
International Classes:
G10L15/10; G10L11/00; G10L15/00; G10L15/02; (IPC1-7): G10L9/12
Domestic Patent References:
| JPS58190999A | 1983-11-08 |
Attorney, Agent or Firm:
Hideto Asamura