Apparatus and method for speech signal level change suppression

Details Apparatus and method for speech signal level change suppression Apparatus and method for speech signal level change suppression

1991-08-20

1994-01-11

Shaw, Dale M.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

395 2, 395 24, 395 28, 36472401, 36472412, 36472801, G10L 500

Patent

active

052789101

ABSTRACT:
A level measuring circuit first measures a level of an input speech signal. Next, a coefficient calculating circuit determines a value for suppressing a change of the level of the input speech signal on the basis of an output of the level measuring circuit. Then an input speech signal delay circuit delays the input speech signal by a time required for processing in the level measuring circuit and the coefficient calculating circuit. Finally a multiplying circuit multiplies an output of the input speech signal delay circuit by an output of the coefficient calculating circuit to obtain an output speech signal in which changes in level of the input speech signal are suppressed.

REFERENCES:
patent: 4389540 (1983-06-01), Nakamura et al.
patent: 4587620 (1986-05-01), Niimi et al.
patent: 4852169 (1989-07-01), Veeneman et al.
patent: 4935963 (1990-06-01), Jain
"Consonant Burst Enhancement: A Possible Means to Improve Intelligibility for the Hard of Hearing", R. W. Guelke, Veterans Admins.; Journal of Rehabilitation Research & Development vol. 24, No. 4, pp. 217-220.

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