DocumentCode
517085
Title
A 3μ CMOS Digital Codec with Programmable Echo Cancellation and Gain Setting
Author
Defraeye, Paul ; Rabaey, Dirk ; Roggeman, Wim ; Yde, Johan ; Kiss, Layos
Author_Institution
Bell Telephone Manufacturing Company, Central, Research Laboratory, Francis Wellesplein, Antwerp, Belgium
fYear
1984
fDate
0-0 Sept. 1984
Firstpage
239
Lastpage
243
Abstract
A 3μ CMOS Digital Signal Processor (DSP) performs speech signal shaping, programmable echo cancellation and gain setting functions for telephone application. A/D and D/A conversions are performed by making use of ΔΣ modulators, decimator and interpolator filter blocks. In addition, the DSP acts as a control interface between the SLIC and the line card controller, the debouncing of eight line status bits included.
Keywords
CMOS process; Codecs; Digital signal processing; Digital signal processors; Echo cancellers; Filters; Performance gain; Signal processing; Speech processing; Telephony;
fLanguage
English
Publisher
ieee
Conference_Titel
Solid-State Circuits Conference, 1984. ESSCIRC '84. Tenth European
Conference_Location
Edinburgh, UK
Type
conf
Filename
5469132
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