…The search for an ideal code that would achieve such highly reliable communication and have a coding rate close to the communication capacity has continued for half a century, and various practical codes have been invented in the process. Many of the error-correcting codes commonly used in practice, such as the BCH (Bose-Chaudhuri-Hocquenghem) code and the RS (Reed-Solomon) code, named after their inventors, belong to the class of linear codes, particularly cyclic codes. Linear codes are introduced using linear calculations in finite fields (also called Galois fields), which are finite sets in which the four arithmetic operations of addition, subtraction, multiplication, and division are defined. … *Some of the terminology explanations that mention "RS code" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…このように信頼性の高い通信を実現し,しかも,符号化率が通信容量に近い値をとる理想的な符号が,半世紀にわたり探究され続けたが,その試みの中からさまざまな実用的符号が発明された。発明者たちの名前を冠して呼ばれる〈BCH(Bose-Chaudhuri-Hocquenghem)符号〉,〈RS(Reed-Solomon)符号〉等の,現実によく用いられる誤り訂正符号の多くは,〈線形符号〉,その中でも,〈巡回符号〉と呼ばれるクラスに属する。 線形符号は,加減乗除の四則演算が定義された有限集合である〈有限体〉(〈ガロア体〉ともいう)のうえの線形計算を用いて導入される。… ※「RS 符号」について言及している用語解説の一部を掲載しています。 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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