DATA COMMUNICATION VIA A VOICE CHANNEL OF A WIRELESS COMMUNICATION NETWORK USING DISCONTINUITIES
First Claim
1. A method of communicating digital data via a wireless telecommunications network using a voice encoder that operates in different modes according to a classification of incoming data into categories that include at least voiced, unvoiced, and transient speech, wherein each of the different modes is associated with a coding scheme for encoding the incoming data, the method comprising the steps of:
- generating a modulated carrier signal by modulating at least one carrier signal with digital data such that the modulated carrier signal includes discontinuities and energy characteristics that cause the voice encoder to classify the modulated carrier signal as transient speech;
inputting the modulated carrier signal into the voice encoder;
obtaining an encoded output that is generated by the voice encoder using the inputted modulated carrier signal; and
transmitting the encoded output across a voice channel of the wireless telecommunications network.
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Accused Products
Abstract
A system and method for data communication over a cellular communications network that allows the transmission of digital data over a voice channel using a vocoder that operates in different modes depending upon characteristics of the inputted signal it receives. To prepare the digital data for transmission, one or more carrier signals are encoded with the digital data using one of a number of modulation schemes that utilize differential phase shift keying to give the modulated carrier signal certain periodicity and energy characteristics that allow it to be transmitted by the vocoder at full rate. The modulation schemes include DPSK using either a single or multiple frequency carriers, combined FSK-DPSK modulation, combined ASK-DPSK, PSK with a phase tracker in the demodulator, as well as continuous signal modulation (ASK or FSK) with inserted discontinuities that can be independent of the digital data.
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Citations
11 Claims
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1. A method of communicating digital data via a wireless telecommunications network using a voice encoder that operates in different modes according to a classification of incoming data into categories that include at least voiced, unvoiced, and transient speech, wherein each of the different modes is associated with a coding scheme for encoding the incoming data, the method comprising the steps of:
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generating a modulated carrier signal by modulating at least one carrier signal with digital data such that the modulated carrier signal includes discontinuities and energy characteristics that cause the voice encoder to classify the modulated carrier signal as transient speech; inputting the modulated carrier signal into the voice encoder; obtaining an encoded output that is generated by the voice encoder using the inputted modulated carrier signal; and transmitting the encoded output across a voice channel of the wireless telecommunications network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of wirelessly transmitting digital data using an EVRC-B vocoder, the method comprising the steps of:
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generating a modulated carrier signal by modulating at least one carrier signal with digital data using a continuous signal modulation technique and inserting discontinuities that create phase changes in the modulated carrier signal without encoding any of the digital data into the phase changes; inputting the modulated carrier signal into an EVRC-B vocoder; obtaining an encoded output from the vocoder; and transmitting the encoded output via an antenna. - View Dependent Claims (11)
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Specification