Energy based pulse position detector for telephone wire networks

Details Energy based pulse position detector for telephone wire networks Energy based pulse position detector for telephone wire networks

1998-06-23

2000-11-28

Dorvil, Richemond

Data processing: speech signal processing, linguistics, language

Modification of at least one characteristic of speech waves

Transformation of speech into a nonaudible representation,...

704399, H04M 100

Patent

active

061547247

ABSTRACT:
A system for detecting a pulse position is provided in a telephone wire network. An absolute value detector determines the absolute value of a received pulse signal supplied from a telephone wire, and produces a waveform envelope. A low-pass filter filters out high frequency components of the envelope. An integrator performs the time integration of the filtered envelope to produce an integrated waveform representing the energy of the received pulse signal. A slicing circuit determines when the integrated waveform crosses threshold level to detect the time position corresponding to the arrival time of the received pulse signal. The arrival time position is translated into a digital value representing data received form the telephone wire.

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patent: 4645881 (1987-02-01), LeToumelin et al.
patent: 5673304 (1997-09-01), Connor et al.
patent: 5930340 (1999-07-01), Bell
patent: 5977822 (1999-11-01), Rybicki et al.
patent: 6011579 (2000-01-01), Newlin

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