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Patent Searching and Data


Title:
SOUND RECOGNIZING METHOD
Document Type and Number:
Japanese Patent JPH03230255
Kind Code:
A
Abstract:

PURPOSE: To enable a real-time processing and to secure the high rate of recognition by using a value differentiating the average of frequency characteristics among respective blocks, which are hourly equally divided, among the blocks in correspondent bands as an input to a neural network.

CONSTITUTION: The already known input sound waveform of each recognizing word is passed through a 16 channel band pass filter 11 and the frequency characteristic of the input sound is calculated. In the respective bands of the band pass filter 11, respective sound blocks hourly equally dividing the sound waveform into eight are defined as one block, and an averaging circuit 12 calculates the average of the frequency characteristics in the respective blocks. The average, which is calculated in the respective bands, of the frequency characteristics in the respective blocks is divided by the power of the word and normalized and next, logarithm is calculated. Then, difference from an adjacent (i+1) block is calculated and a differential value H is calculated. After wards, the calculated value is defined as the input to a neural network 20. Thus, the real rime processing is enabled and the high rate of recognition is secured.


Inventors:
OKASHITA KAZUHIKO
NISHIMURA SHINGO
MIYAGAWA MASASHI
Application Number:
JP2667190A
Publication Date:
October 14, 1991
Filing Date:
February 05, 1990
Export Citation:
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Assignee:
SEKISUI CHEMICAL CO LTD
International Classes:
G06F15/18; G06N3/00; G06N99/00; G10L15/02; G10L15/08; (IPC1-7): G06F15/18; G10L3/00; G10L7/08