Electrical audio signal processing systems and devices – One-way audio signal program distribution
Patent
1997-05-27
1999-09-14
Lee, Thomas D.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
348 8, H04B 300
Patent
active
059534290
ABSTRACT:
A passenger entertainment system employing an improved digital audio signal distribution system and method for use on commercial aircraft and other vehicles. A plurality of digital audio signal sources are provided for generating a plurality of compressed digital audio signals. The compressed digital audio signals are provided to a multiplexer which domain multiplexes those signals to produce a single composite digital audio data signal. The composite digital audio data signal is provided to a demultiplexer which is capable of selecting a desired channel from the composite digital audio data signal. The selected channel is provided to a decompression circuit, where it is expanded to produce a decompressed digital output signal. The decompressed digital output signal is then provided to a digital-to-analog converter and converted to an analog audio signal. The analog audio signal is provided to an audio transducer.
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Frost, Jr. William Arlington
Lemmer John E.
Wakai Bruce M.
Brinich Stephen
Lee Thomas D.
Matsushita Avionics Systems Corporation
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