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AssigneeNone recorded
InventorsTomohiro Otani, Masatoshi Suzuki
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A data/audio multiplex transmission system comprising an audio modulator to modulate an input audio signal and output the modulated audio signal, an optical pulse signal generator to generate an optical pulse signal for carrying a LAN data, amplitude of the optical pulse signal being modulated by the modulated audio signal, according to the LAN data and the modulated audio signal, an optical fiber to propagate the optical signal output from the optical pulse signal generator, an opto-electric converter to convert the optical signal propagated on the optical fiber into an electric signal, a filter to extract a predetermined band out of the output signal from the opto-electric converter, an audio demodulator to demodulate the audio signal out of the output from the filter, and a data transmitter to transmit the LAN data included in the output signal from the opto-electric converter for a LAN.
A data/audio multiplexer/demultiplexer comprising:
A method for multiplexing/demultiplexing data and audio signal comprising steps of:
A data/audio multiplex transmission system comprising:
A data/audio multiplex transmission method comprising steps of:
Dependencies are inferred from the claim text.
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Data switching networks: arrangements for connecting between networks having differing types of switching systems, e.g. gateways
Digital communication
Term end not estimated
This application claims priority to Japanese Patent Application No. 2002-112809, filed Apr. 16, 2002, the entire contents of which are incorporated herein by reference.
This invention generally relates to a system, method, and apparatus for multiplex-transmitting a data and audio, and more specifically relates to a data/audio multiplexer/demultiplexer which gives an additional function for multiplexing/demultiplexing audio signal to an optical transceiver which transmits and receives a data through optical fibers, data/audio multiplex transmission system, and methods thereof.
Internet access through the medium of an optical fiber called FTTH (Fiber To The Home) has been utilized. In the FTTH, an apparatus to convert a format and protocol of a transmission data is disposed between an optical fiber and a LAN or computer. Such apparatus is generally called a media converter.
The above and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention in conjunction with the accompanying drawings, in which:
FIG. 1 shows a schematic block diagram of an explanatory embodiment according to the invention; and
FIG. 2 shows an example of output waveform from an AM modulator 40.
Explanatory embodiments of the invention are explained below in detail with reference to the drawings.
FIG. 1 shows a schematic block diagram of an explanatory embodiment according to the invention. A media converter 10 installed in a user's set connects to a media converter 16 at a telephone switching station through optical fibers 12 and 14. The optical fiber 12 transmits a signal from the media converter 10 to the media converter 16, and the optical fiber 14 transmits a signal from the media converter 16 to the media converter 10.
First, the transmission of a data D1 and audio signal V1 from the user's house to the telephone switching station is explained below.