A system of number representation, or an information code, in which each decimal digit is represented by a combination of four binary digits (bits).; 一種數(shù)字表示法或者說(shuō)一種信息代碼。根據(jù)這種方法,每個(gè)十進(jìn)制數(shù)都可用4個(gè)二進(jìn)制數(shù) 位的組合來(lái)表示。