|
|
Article: "Data-pump" chips add voice capabilities. (to modem chip sets) (Product Announcement)
- Article from:
- EDN
- Article date:
- November 14, 1991
- Author:
CopyrightCOPYRIGHT 1991 Reed Business Information, Inc. (US). This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
FREMONT, CA--Cirrus Logic this week joins a host of IC makers adding voice capability to modem chip sets that transmit data and facsimile in notebook personal computer, voice mail, and other applications. A lack of standard software command sets for voice-transmission functions, though, may delay acceptance by modem designers and their customers.
Chip vendors basically all begin with a digital signal processr (DSP) in their quest to implement voice, but there the similarity ends. The data-crunching capabilities of these commnications ICs lead some to call them "data pumps." Partitioning the A/D conversion, signal conditioning, compression, and control functions ...