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