Remote monitoring system
OwnerJohn E. Fitzsimmons, Denis P. Phillips +1inventors
InventorsJohn E. Fitzsimmons, Denis P. Phillips, Michael G. Thaw
Life of this patent
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Abstract
A system for monitoring a selected channel signal included within a multiplex of channel signals and for transmitting a representation of the selected channel signal to a monitoring location is disclosed. The system includes a demultiplexer which receives the multiplex of channel signals and demultiplexes the selected channel signal in response to a channel select command. A transmitter unit receives the demultiplexed channel signal from the demultiplexer, compresses the demultiplexed channel signal, converts the compressed demultiplexed channel signal to a packet signal and transmits the packet signal to the monitoring location via a telecommunications link.
Claims22
A system for monitoring a selected channel signal included within a multiplex of channel signals and transmitting a representation of the selected channel signal to a monitoring location, the system comprising:
- a demultiplexer receiving the multiplex of channel signals and demultiplexing the selected channel signal in response to a channel select command;
- and
- a transmitter unit receiving the demultiplexed channel signal from said demultiplexer, compressing the demultiplexed channel signal, converting the compressed demultiplexed channel signal to a packet signal and transmitting the packet signal to the monitoring location via a telecommunications link.
A transmitter unit for receiving a channel signal and transmitting a representation of the channel signal to a monitoring location, said transmitter unit comprising:
- an encoder unit which compresses the received channel signal to a bit rate, the bit rate being selectable to one of a fixed rate and a variable rate, the variable rate being determined to achieve a constant quality, said encoder converting the compressed channel signal to a packet signal for transmission to the monitoring location via a telecommunication link and adjusting a packet rate of the packet signal to conform to the bit rate of the compressed channel signal;
- and
- an infrared control unit for receiving a demultiplexer command signal from the encoder unit and transmitting the demultiplexer command signal by an infrared signal.
Dependencies are inferred from the claim text.