Digital transmission

Japanese: ディジタル伝送 - ディジタルでんそう(英語表記)digital transmission
Digital transmission
A method of communication that transmits information using discrete signals (digital signals) such as binary codes of "present" or "absent" or even ternary codes. Information can be digital, such as the data signal from a digital computer, or analog signals, such as those used in telephone calls, in which the information is directly converted into a proportional amount of electricity. Pulse Code Modulation (PCM), the most common method of digitally transmitting analog signals, was invented by A.H. Reeves of England in 1937 and theoretically studied by C.E. Shannon of the United States.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
情報を〈あり〉〈なし〉の二進符号やさらに三進符号などの離散的な信号(ディジタル信号)を用いて伝達する通信の方式。情報にはディジタルコンピューターからのデータ信号のようなディジタル信号と電話のように情報をそのまま比例的に電気量に変換したアナログ信号がある。アナログ信号をディジタル的に伝送する方式としてもっとも一般的なパルス符号変調(PCM)方式は,イギリスのリーブズA.H.Reevesによって発明され(1937),アメリカのシャノンC.E.Shannonによって理論的に研究がなされた。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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