Data processing: speech signal processing – linguistics – language – Audio signal bandwidth compression or expansion
Patent
1997-03-25
1999-09-28
Dorvil, Richemond
Data processing: speech signal processing, linguistics, language
Audio signal bandwidth compression or expansion
704503, G10L 900
Patent
active
059604000
ABSTRACT:
A signal transfer acceleration system accelerates transfer of an audio signal through a communications channel, such as a telephone line, RF link, or other suitable audio signal communications channel. The connection along the communications channel takes much less time than would be required if the audio signal were played at its normal speed. The signal transfer acceleration system includes a specially designed transmitter system and a specially designed receiver system that are interfaced via the communications channel. The transmitter system includes: (1) a transmitter storage device configured to store the audio signal at a first sample rate; (2) a filter configured to reduce a frequency range of the signal by filtering frequencies from the signal; (3) a transmitter configured to transmit the signal along the communications channel at a second sample rate that is faster than the first sample rate so that the frequency range is expanded while a time period of the transfer is reduced. A receiver system is interfaced to the communications channel. The receiver system includes: (1) a receiver configured to receive the signal from the communications channel; (2) a receiver storage device configured to store the signal at a third sample rate that restores said frequency range; and (3) a playback mechanism configured to play the signal at the first sample rate.
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Dorvil Richemond
Paradyne Corporation
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