Motorola APX 5000 Service Manual page 315

Glossary
Term
VCO
vector sum excited
linear predictive
coding
VHF
VOCON
vocoder
vocoder/controller
voice encoder
voltage-controlled
oscillator
See voltage-controlled oscillator.
A voice-encoding technique used in ASTRO digital voice.
Very-High Frequency.
See vocoder/controller.
An electronic device for synthesizing speech by implementing a
compression algorithm particular to voice. See also voice encoder.
A PC board that contains an ASTRO radio's microcontroller, DSP,
memory, audio and power functions, and interface support circuitry.
The DSP-based system for digitally processing analog signals, and
includes the capabilities of performing voice compression algorithms or
voice encoding. See also vocoder.
An oscillator in which the frequency of oscillation can be varied by
changing a control voltage.
Definition
Sec 3: Glossary-11