Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1997-02-12
1999-06-15
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704226, 379283, 379351, G10L 300, H04L 1500
Patent
active
059131896
ABSTRACT:
A communication system, and related method, for reliably transmitting DTMF code signals through a low-bit rate channel employing a VSELP speech compression algorithm. The system adds relatively low-level noise to the analog DTMF signals before encoding by the compression algorithm. By adding the low-level noise to the DTMF signals, the tones associated with the DTMF signals can be reliably detected on the receiving end.
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Hall Jeanne
Housam Dan
Lee Ho
Azad Abul K.
Hudspeth David R.
Hughes Electronics Corporation
Sales Michael W.
Whelan John T.
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