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Title:
VOICE SIGNAL TRANSMITTER-RECEIVER
Document Type and Number:
Japanese Patent JPH0774709
Kind Code:
A
Abstract:

PURPOSE: To supply a received voice with high articulation by easily controlling the received sound volume.

CONSTITUTION: A VSELP encoder 3 encodes a voice signal subject to high efficiency coding through digital signal processing. A noise block detection circuit 4 uses an analysis parameter obtained by the VSELP encoder 3 to detect a background noise block. Since a noise level detection circuit 5 detects a noise level of a noise block detected by the noise block detection circuit 4, the circuit 5 detects a background noise level with high reliability and a microcomputer 6 controls the received sound volume in response to the background noise level detected by the noise level detection circuit 5.


Inventors:
Katayanagi, Keiichi
Odaka, Kentaro
Nishiguchi, Masayuki
Application Number:
JP1994000040729
Publication Date:
March 17, 1995
Filing Date:
March 11, 1994
Export Citation:
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Assignee:
SONY CORP
International Classes:
G10L19/04; G10L11/02; G10L19/00; H03M7/30; H04B14/04; H04B15/00; G10L21/02; (IPC1-7): H04B14/04; G10L9/14; G10L9/18; H03M7/30; H04B15/00
Attorney, Agent or Firm:
小池 晃 (外2名)



 
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