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AssigneeVocal Technologies, Ltd.
InventorsVictor Demjanenko, Frederic J. Hirzel
Estimating the term…
A method of discovering characteristics of a PCM channel between a first PCM modem and a second PCM modem, comprising the steps of creating a PCM representation of a probing tone ensemble, where the probing tone ensemble comprises one or more tones, transmitting the PCM representation of the probing tone ensemble from the first PCM modem to the second PCM modem, receiving the PCM representation of the probing tone ensemble by the second PCM modem; and, processing the PCM representation of the probing tone ensemble to determine characteristics of the PCM channel. The invention also comprises a method of improving echo canceller training of a modem comprising generating an echo canceller training reference signal modifying the echo canceller training reference signal sending the modified echo canceller training reference signal into a channel, receiving an echo of the modified echo canceller training signal; and, processing the echo canceller training reference signal and the received echo of the modified echo canceller training reference signal.
Method of discovering characteristics of a PCM channel using signals compatible with non-PCM modems, comprising:
A method of discovering characteristics of a PCM channel between an analog PCM modem and a digital PCM modem, comprising:
A method in an analog PCM modem, comprising:
A method of discovering characteristics of a PCM channel using signals compatible with non-PCM modems, comprising:
A method of discovering characteristics of a PCM channel using an analog signal, comprising:
Dependencies are inferred from the claim text.