Analog to digital voice transmitter

Details Analog to digital voice transmitter Analog to digital voice transmitter

1998-11-13

2000-12-05

Pierre, Peguy Jean

Coded data generation or conversion

Digital code to digital code converters

Substituting specified bit combinations for other prescribed...

379 9308, H03M 500

Patent

active

061573248

ABSTRACT:
An analog to digital voice transmitter which converts analog voice to digital voice data. The transmitter contains a converter for converting digital voice data which corresponds to control data codes, to non-control data. In one embodiment, an ADPCM encoder encodes inputted analog voice signals to ADPCM digital voice codes. A S/P converter converts serial signals to parallel signals of the byte unit. A code converter detects codes to be removed which exist in the ADPCM data of the byte unit and converts the codes to be removed to a code not to be removed by adding or subtracting a data value of 1 to the code to be removed. A transmission FIFO memory stores the ADPCM data in order. A P/S converter converts the parallel data of the byte unit to the serial signals. A transmitting section transmits the serial data in infrared rays to a receiver.

REFERENCES:
patent: 4512026 (1985-04-01), Vander Meiden
patent: 5128792 (1992-07-01), Teich et al.
patent: 5796716 (1998-08-01), Smith
patent: 5825830 (1998-10-01), Kopf
patent: 5835036 (1998-11-01), Takefman
patent: 5905756 (1999-05-01), Lamkin et al.
patent: 5912752 (1999-06-01), Mollett et al.

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