Radio and television distribution system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 25, 1996
Grant Date -
N/A
app pub date -
Oct 24, 1994
filing date -
Oct 30, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A distribution system, useful with radio and television distribution, for distributing a signal having a plurality of channels includes a central station. The central station produces a first frequency division multiplexed signal in which signals from a plurality of channels or channel groups are frequency-converted and combined, and introduces the first frequency division multiplexed signal into transmission media of the distribution system. The first frequency division multiplexed signal may include occupied channels, freely selectable occupied channels, and free channels. A plurality of further stations receive the first frequency division multiplexed signal from the central station and process it with signals of a plurality of further channels to produce a second frequency division multiplexed signal. The signals of the plurality of further channels may be put in free channels, or used to replace signals in freely selectable occupied channels of the first frequency division multiplexed signal. A plurality of user devices receive the second frequency division multiplexed signal from at least one of the plurality of further stations, and split it into individual channel or channel group signals for user access.
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