Back to results
US 5,670,902 AGranted
Satellite broadcast receiving system and change-over divider for use in same
AssigneeSony Corporation
InventorsYutaka Nakagawa, Tadashi Kajiwara, Keiji Fukuzawa, Keiji Yuzawa
Life of this patent
Estimating the term…
Abstract
A satellite broadcast receiving system in which, when each receiver transmits a control pulse to a change-over divider via a signal cable, the change-over divider selects a desired broadcast signal in response to the control pulse, which is led to its output terminal, then transmitted to each receiver via the signal cable.
Claims7
A change-over divider for selecting at least one of a plurality of input signals, comprising:
- a plurality of input terminals receiving respectively said plurality of input signals comprising broadcast satellite signals, communication satellite signals, and UHF broadcast signals;
- a plurality of selector switches, each switch having a plurality of inputs respectively connected to receive said broadcast satellite signals and said communication satellite signals and each switch having an output terminal for outputting a selected one of said plurality of inputs;
- a plurality of mixer means for mixing said broadcast satellite signals, said communication satellite signals, and said UHF broadcast signals and producing respective mixed output signals therefrom;
- a plurality of input/output terminals connected respectively to said outputs of said plurality of mixer means and for receiving respective coded control pulses and power supply signals from respective external sources and for outputting said mixed output signals;
- control pulse detection means connected to said plurality of input/output terminals for detecting said coded control pulses input through at least one of said plurality of input/output terminals;
- and
- a microcomputer connected to said plurality of selector switches and said control pulse detection means, said microcomputer decoding said coded control pulses and outputting a change-over control signal to one of said plurality of switches in response to said decoded control pulses,
- said one of said plurality of selector switches independently selecting one of said plurality of input signals in response to said change-over control signal supplied by said microcomputer.
5 more elements
A change-over divider for selecting at least one of a plurality of input signals, comprising:
- a plurality of input terminals respectively receiving a plurality of input signals comprising broadcast satellite signals, communication satellite signals, and VHF broadcast signals;
- a plurality of selector switches, each having a plurality of inputs connected respectively to receive said broadcast satellite signals and said communication satellite signals and each switch having an output terminal for outputting a selected one of said plurality of inputs;
- mixer means for mixing each said output from said plurality of switches and said VHF broadcast signals, and producing a respective plurality of mixed output signals;
- a plurality of input/output terminals connected respectively to receive said plurality of mixed output signals from said mixer means and to receive coded control pulses and power supply signals from respective external sources and for respectively outputting said plurality of mixed output signals;
- control pulse detection means connected to said plurality of input/output terminals for detecting said coded control pulses input through at least one of said plurality of input/output terminals;
- and
- a microcomputer connected to said control pulse detection means for decoding said coded control pulses and controlling said plurality of selector switches by outputting a change-over control signal to one of said plurality of selector switches in response to said decoded control pulses, whereby said one of said plurality of selector switches independently selects one of said broadcast satellite signals and said communication satellite signals in response to said change-over signal.
4 more elements
Dependencies are inferred from the claim text.