Transmission of voice and information signals in a single line
First Claim
1. A signal processing apparatus, comprising:
- a first circuit having an output terminal, the first circuit configured to receive a first signal from a modem, the first signal comprising a first frequency band and pass a component of the first signal having a higher frequency than a first predetermined frequency; and
a second circuit having an output terminal, the second circuit configured to receive a second signal comprising a second frequency band overlapping with at least a portion of the first frequency band, the second circuit configured to pass a component of the second signal having a lower frequency than a second predetermined frequency;
wherein the output terminal of the first circuit is connected to the output terminal of the second circuit.
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Accused Products
Abstract
This invention relates to a signal processing apparatus. The apparatus comprises a first circuit and a second circuit having an output terminal, respectively. The first circuit is configured to receive a first signal comprising a first frequency band and pass a component of the first signal having a higher frequency than a first predetermined frequency. The second circuit is configured to receive a second signal comprising a second frequency band overlapping with at least a portion of the first frequency band. Also, the second circuit is configured to pass a component of the second signal having a lower frequency than a second predetermined frequency. Here, the output terminal of the first circuit is connected to the output terminal of the second circuit. According to the invention, the voice and the data can be transmitted through the single transmission line.
20 Citations
54 Claims
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1. A signal processing apparatus, comprising:
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a first circuit having an output terminal, the first circuit configured to receive a first signal from a modem, the first signal comprising a first frequency band and pass a component of the first signal having a higher frequency than a first predetermined frequency; and
a second circuit having an output terminal, the second circuit configured to receive a second signal comprising a second frequency band overlapping with at least a portion of the first frequency band, the second circuit configured to pass a component of the second signal having a lower frequency than a second predetermined frequency;
wherein the output terminal of the first circuit is connected to the output terminal of the second circuit.
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2. A signal processing apparatus for use in telecommunication over a transmission line, the apparatus comprising:
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a first circuit having an output terminal, the first circuit configured to receive a first signal from a modem, the first signal comprising a first frequency band and pass a component of the first signal having a higher frequency than a first predetermined frequency, the output terminal adapted to transmit an output signal of the first circuit over the transmission line; and
a second circuit having an output terminal, the second circuit configured to receive a second signal comprising a second frequency band overlapping with at least a portion of the first frequency band, the second circuit configured to pass a component of the second signal having a lower frequency than a second predetermined frequency;
wherein the output terminal of the first circuit is connected to the output terminal of the second circuit. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A method of processing data and voice signals for transmitting via a transmission line, the method comprising:
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receiving a data signal comprising a first frequency band;
receiving a voice signal comprising a second frequency band overlapping with at least a portion of the first frequency band;
passing a component of the data signal, the component having a higher frequency than a first predetermined frequency;
passing a component of the voice signal, the component having a lower frequency than a second predetermined frequency; and
combining the components of the data and voice signals onto the transmission line. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 53)
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48. The communication system, comprising:
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a transmission line having first and second terminals;
a first terminal device connected to the first terminal of the transmission line; and
a second terminal device connected to the second terminal of the transmission line;
wherein the first terminal device comprises first and second circuits, wherein the first circuit has an output terminal, is configured to receive a first signal comprising a first frequency band and pass a component of the first signal having a higher frequency than a first predetermined frequency;
and wherein the second circuit has an output terminal, and is configured to receive a second signal comprising a second frequency band overlapping with at least a portion of the first frequency band, and to pass a component of the second signal having a lower frequency than a second predetermined frequency.
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54. A communication method in a communication system including a transmission line having first and second terminals, a first terminal device connected to the first terminal of the transmission line and a second terminal device connected to the second terminal of the transmission line, the method comprising:
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receiving a first signal comprising a first frequency band;
receiving a second signal comprising a second frequency band overlapping with at least a portion of the first frequency band;
passing a component of the first signal, the component having a higher frequency than a first predetermined frequency;
passing a component of the second signal, the component having a lower frequency than a second predetermined frequency;
combining the components of the first and second signal; and
transmitting the combined components to the one of the first and second terminal devices through the transmission line.
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Specification