Transmitting stereo audio programs in cable TV systems
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United States of America Patent
Stats
-
Nov 4, 1986
Grant Date -
N/A
app pub date -
Apr 26, 1985
filing date -
Apr 26, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Stereo audio signals are transmitted over optical fibres in a cable TV system in which stereo radio signals are received and demodulated to produce respective stereo multiplex signals. These stereo multiplex signals are then sampled, digitized and combined to produce a digital multiplex. The digital multiplex is carried over an optical fibre by first modulating the frequency of a video sub-carrier which in turn modulates the intensity of light emitted by a light source. At a switching point stereo multiplex signals are regenerated which modulate FM carriers having substantially the same frequency as the original radio signals.
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