Process for the transmission of an audiofrequency analog signal

Details Process for the transmission of an audiofrequency analog signal Process for the transmission of an audiofrequency analog signal

1979-10-01

1981-02-24

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 704

Patent

active

042531152

ABSTRACT:
The transmission process comprises a coding of the sound signal consisting of converting it into words of n bits at a frequency double the line frequency and during each synchronization pulse transmitting four words of n bits corresponding to different samples, which introduces a redundancy of two and a decorrelation between the different samples. The process involves a decoding operation consisting of comparing the two representations of the sample transmitted during the two synchronization pulses and selecting one representation for each sample as a function of the result of the comparison.

REFERENCES:
patent: 3755624 (1973-08-01), Sekimoto
patent: 4191969 (1980-04-01), Briand et al.

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