Superposition of data over voice
First Claim
1. Method of transmitting at least one message between at least a first communication device (2, 4, 6, 8, 10) and at least a second communication device (12, 14, 16, 18, 20), via a communication channel (22) allowing at least voice messages to be transmitted between said first and said second communication devices, said at least one message including data being subdivided in a sequence of basic data units, said method comprising the following steps:
- a. encoding each of the basic data units as unique signals (usj), each unique signal (usj) comprising a predetermined number of basic signals (bi) each basic signal having a unique fixed frequency (f1);
b. transmitting a sequence of unique signals (usj) between said first and said second communication devices during a sequence of fixed time periods (t1, t2, t3, . . . ), any one of said sequence of unique signals (usj) lasting at least one time period;
c. receiving and decoding said sequence of unique signals (usj) into said sequence of basic data units;
wherein said data is transmitted in said communication channel at least during a period that said communication channel is also available for transmitting voice signals.
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Abstract
Method and apparatus for transmitting messages between communication devices via a communication channel allowing at least voice messages to be transmitted, the messages including data subdivided in a sequence of basic data units, the method including: a) encoding the basic data units as unique signals (usj) including a predetermined number of basic signals (bi), each basic signal having a unique fixed frequency (fi); b) transmitting a sequence of unique signals (usj) during a sequence of fixed time periods (t1, t2, t3, . . . ); c) receiving and decoding the sequence of unique signals (usj) into the sequence of basic data units; the data being transmitted in superposition over voice.
126 Citations
40 Claims
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1. Method of transmitting at least one message between at least a first communication device (2, 4, 6, 8, 10) and at least a second communication device (12, 14, 16, 18, 20), via a communication channel (22) allowing at least voice messages to be transmitted between said first and said second communication devices, said at least one message including data being subdivided in a sequence of basic data units, said method comprising the following steps:
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a. encoding each of the basic data units as unique signals (usj), each unique signal (usj) comprising a predetermined number of basic signals (bi) each basic signal having a unique fixed frequency (f1);
b. transmitting a sequence of unique signals (usj) between said first and said second communication devices during a sequence of fixed time periods (t1, t2, t3, . . . ), any one of said sequence of unique signals (usj) lasting at least one time period;
c. receiving and decoding said sequence of unique signals (usj) into said sequence of basic data units;
wherein said data is transmitted in said communication channel at least during a period that said communication channel is also available for transmitting voice signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 22, 23, 24, 25, 26, 31, 32, 33, 34, 35)
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18. Transmitter (2, 4, 6, 8, 10) for transmitting at least one message to at least one receiver (12, 14, 16, 18, 20), via a communication channel (22) allowing at least voice messages to be transmitted, said at least one message including data being subdivided in a sequence of basic data units, said transmitter comprising telephone means (8), oscillator means (6) for producing a plurality of basic signals (bi) each having a unique fixed frequency (fi) and processing means (2) connected to said telephone means (8) and said oscillator means (6) and arranged for:
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a. encoding each of the basic data units as unique signals (usj), each unique signal (usj) comprising a predetermined number of basic signals (bi);
b. transmitting a sequence of unique signals (usj) to said receiver during a sequence of fixed time periods (t1, t2, t3, . . . ), any one of said sequence of unique signals (usj) lasting at least one time period;
wherein said data is transmitted in said communication channel at least during a period that said communication channel is also available for transmitting voice signals. - View Dependent Claims (19, 20, 21, 27, 28, 29, 30)
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36. Transceiver (2, 4, 6, 8, 10) arranged for transmitting at least one first message to at least one receiver (12, 14, 16, 18, 20). via a communication channel (22) allowing at least voice messages to be transmitted, said at least one first message including data being subdivided in a first sequence of basic data units, said transmitter comprising telephone means (8), oscillator means (6) for producing a plurality of basic signals (bi) each having a unique fixed frequency (fi) and processing means (2) connected to said telephone means (8) and said oscillator means (6) and arranged for:
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a. encoding each of the basic data units as unique signals (usj), each unique signal (usj) comprising a predetermined number of basic signals (bi);
b. transmitting a first sequence of unique signals (usj) to said receiver during a first sequence of fixed time periods (t1, t2, t3, . . . ), any one of said first sequence of unique signals (usj) lasting at least one time period;
wherein said data is transmitted in said communication channel at least during a period that said communication channel is also available for transmitting voice signals, said processing means (12) also being arranged for;
c. receiving at least one second sequence of unique signals (usj) during a second sequence of fixed time periods (t1, t2, t3, . . . ), any one of said at least one second sequence of unique signals (usj) lasting at least one time period and comprising a unique, predetermined number of basic signals (b1), each basic signal having a unique fixed frequency (fi);
d. decoding said at least one second sequence of unique signals (usj) into a second sequence of basic data units.
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37. Computer readable medium comprising computer readable software allowing a communication device (2, 4, 6, 8, 10), after having loaded said software, to transmit at least one first message to at least one receiver (12, 14, 16, 18, 20), via a communication channel (22) allowing at least voice messages to be transmitted, said at least one first message including data being subdivided in a first sequence of basic data units, and to:
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a. encode each of the basic data units as unique signals (usj), each unique signal (usj) comprising a predetermined number of basic signals (bi), each basic signal having a unique fixed frequency (fi);
b. transmit a first sequence of unique signals (usj) to said receiver during a first sequence of fixed time periods (t1, t2, t3, . . . ), any one of said first sequence of unique signals (usj) lasting at least one time period;
wherein said data is transmitted in said communication channel at least during a period that said communication channel is also available for transmitting voice signals. - View Dependent Claims (38)
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39. A computer data signal embodied in a carrier wave comprising computer readable software allowing a communication device (2, 4, 6, 8, 10), after having loaded said software, to transmit at least one first message to at least one receiver (12, 14, 16, 18, 20), via a communication channel (22) allowing at least voice messages to be transmitted, said at least one first message including data being subdivided in a first sequence of basic data units, and to:
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a. encode each of the basic data units as unique signals (usj), each unique signal (usj) comprising a predetermined number of basic signals (bi), each basic signal having a unique fixed frequency (fi);
b. transmit a first sequence of unique signals (usj) to said receiver during a first sequence of fixed time periods (t1, t2, t3, . . . ), any one of said first sequence of unique signals (usj) lasting at least one time period;
wherein said data is transmitted in said communication channel at least during a period that said communication channel is also available for transmitting voice signals. - View Dependent Claims (40)
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Specification