Cyberoptic audio level control system
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United States of America Patent
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-
Feb 27, 1990
Grant Date -
N/A
app pub date -
Dec 29, 1988
filing date -
Dec 29, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The specification discloses an audio signal level control system including a center-tapped photocell incorporated into an attenuator bridge. The cell elements are monitored while processing the audio signal, and a control circuit regulates the light-emitting device in the cell in response to the monitored bridge values. Preferably, log compression and filtering are performed within the control means. Also preferably, a tracking subtraction principle is used in both the audio and control paths to expand the control dynamic range.
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