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CVSD MODULATOR USING VHDLHicks, William T., Yantorno, Robert E. 10 1900 (has links)
International Telemetering Conference Proceedings / October 18-21, 2004 / Town & Country Resort, San Diego, California / IRIG-106 Chapter 5 describes a method for encoding voice using a simple circuit to reduce the
overall bit rate and still achieve good quality voice. This well described Continuously Variable
Slope Delta Modulation (CVSD) circuit can be obtained using analog parts. A more stable
implementation of CVSD can be obtained by designing an anti-aliasing input filter, an A/D
converter, and logic. This paper describes one implementation of the CVSD using a standard A/D
converter and logic.
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DIGITAL VOICE DECODING IN TODAY'S TELEMETRY SYSTEMKnudtson, Kevin M., Glass, Randy 10 1900 (has links)
International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada / Today’s telemetry systems can reduce spectrum demand and maintain secure voice
by encoding analog voice into digital data using; Continuously Variable Slope Delta
Modulation ( CVSD ) format and imbedding it into a telemetry stream. The model CSC-0390 DvD system is an excellent choice in decoding digital voice, designed with
flexibility, efficiency, and simplicity in mind. Flexibility in design brings forth a
capability of operating on a wide variety of telemetry systems and data formats without
any specialized interfaces. The utilization of 74HC series circuit technology makes this
DvD system efficient in design, low cost, and lower power consumption. In addition the
front panel display and control function is also is an example of Simplicity in design and
operation.
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