Johann Philipp Reis
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Alec Reeves

Pulse code modulation inventor
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Alec Reeves
From Wikipedia

Alec Harley Reeves (10 March 1902 – 13 October 1971) was an English scientist best known for his invention of pulse-code modulation (PCM). He was awarded 82 patents.

Alec Reeves was born in Redhill, Surrey in 1902 and was educated at the Reigate Grammar School, followed by a scholarship to the City and Guilds Engineering College in 1918, and then postgraduate studies at Imperial College London in 1921.

Reeves joined the International Western Electric Company in 1923, and was part of a team of engineers responsible for the first commercial transatlantic telephone link. In 1925 Western… More on Wikipedia →

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Alec Reeves invents pulse code modulation