DocumentCode
2694968
Title
Hands-free mobile telephone using echo canceller LSI
Author
Miyamoto, Ryoichi ; Nakano, Yoshikazu ; Sakata, Yoshio
Author_Institution
Oki Electr. Ind. Co. Ltd., Tokyo, Japan
fYear
1989
fDate
1-3 May 1989
Firstpage
224
Abstract
The authors describe a newly developed echo canceller LSI and a hands-free mobile telephone using the LSI chips. The LSI is of digital signal processor (DSP) type, and the hardware of the LSI is optimized as an echo canceller for use with hands-free mobile telephones. The architecture of the LSI is suitable for echo canceller processing and for easy implementation of software. The LSI is designed to interface with an external μ-law PCM codec. A hands-free mobile telephone using this LSI has been developed which enables natural conversation even during double talk by suppressing howling
Keywords
echo suppression; mobile radio systems; radiotelephony; telephone sets; DSP; digital signal processor; double talk; echo canceller LSI; hands-free mobile telephone; howling suppression; Codecs; Digital signal processing chips; Echo cancellers; Energy consumption; Large scale integration; Loudspeakers; Microphones; Phase change materials; Speech enhancement; Telephony;
fLanguage
English
Publisher
ieee
Conference_Titel
Vehicular Technology Conference, 1989, IEEE 39th
Conference_Location
San Francisco, CA
ISSN
1090-3038
Type
conf
DOI
10.1109/VETEC.1989.40079
Filename
40079
Link To Document