In-band signaling for data communications over digital wireless telecommunications networks
First Claim
1. An inband signaling modem for communicating digital data over a voice channel of a telecommunications network comprising:
- an input for receiving digital data;
an encoder for converting the digital data into audible tones that synthesize frequency characteristics of human speech and prevent voice encoding circuitry in the telecommunications network from corrupting the digital data represented by the synthesized audio tones; and
an output for outputting the synthesized audio tones to a voice channel of a digital wireless telecommunications network.
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Accused Products
Abstract
An inband signaling modem communicates digital data over a voice channel of a wireless telecommunications network. An input receives digital data. An encoder converts the digital data into audio tones that synthesize frequency characteristics of human speech. The digital data is also encoded to prevent voice encoding circuitry in the telecommunications network from corrupting the synthesized audio tones representing the digital data. An output then outputs the synthesized audio tones to a voice channel of a digital wireless telecommunications network.
47 Citations
41 Claims
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1. An inband signaling modem for communicating digital data over a voice channel of a telecommunications network comprising:
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an input for receiving digital data;
an encoder for converting the digital data into audible tones that synthesize frequency characteristics of human speech and prevent voice encoding circuitry in the telecommunications network from corrupting the digital data represented by the synthesized audio tones; and
an output for outputting the synthesized audio tones to a voice channel of a digital wireless telecommunications network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A cellular telephone, comprising:
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an audio microphone for converting voice signals into electrical voice signals;
an analog to digital converter for converting the electrical voice signals into digital voice samples;
a voice coder for converting the digital voice samples into encoded digital voice signals;
a transceiver that transmits the encoded digital voice signals over a digital voice channel of a wireless communications network; and
an inband signaling modem that converts a digital bit stream into synthesized tones and outputs the synthesized tones to the voice coder, the voice coder encoding the synthesized tone in the same manner as the electrical voice signals before being transmitted over the digital voice channel. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. An inband signaling modem for communicating digital data over a digital voice channel of a wireless communications network, comprising:
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an input that receives voice signals over the voice channel of the wireless communications network;
a filter that detects synthesized tones representing the digital data and is interleaved with the voice signals transmitted over the digital voice channel, the synthesized tones synthesizing frequency characteristics of human speech and preventing voice encoding circuitry in the wireless telecommunications network from corrupting the digital data represented by the synthesized audio tones;
and a demodulator that converts the detected synthesized tones back into the represented digital data. - View Dependent Claims (32, 33, 34, 35, 36, 38, 39)
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37. Software code for communicating digital data over a voice channel of a digital wireless telecommunications network comprising:
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code for forming the digital data into a packet payload in an inband signaling packet;
code for attaching preconditioning bits to the inband signaling packet that prevent circuitry in the wireless telecommunications network from corrupting the digital data;
code for converting the bits in the inband signaling packet into a series of voice frequencies that simulate characteristics of human speech; and
code for converting the simulated voice frequencies into encoded data transmitted over the digital voice channel of a wireless telecommunications network.
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40. A method for communicating digital data over the voice channel of a digital wireless telecommunications network comprising:
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receiving a digital bitstream;
encoding the digital bitstream into a continuous audio signal having different frequency tones for different bit values;
selecting the frequency tones to represent speech signals that will pass through a voice coder without being corrupted;
encoding the audio signal into encoded values with a voice coder for transmitting over the digital wireless telecommunications network; and
transmitting the encoded values over the digital wireless telecommunications network. - View Dependent Claims (41)
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Specification