电子技术 课件 5.1 编码

CODING编码电子技术王瑾什么是编码01编码的形式02什么是编码你身边存在的编码全屏播放动画常用的编码给2个苹果编码，需用1位二进制码表示01二进制编码00011011给4个苹果编码，需用2位二进制码表示000001010011100101110111给8个苹果编码，需用3位二进制码表示给9个苹果编码，需用几位二进制码表示呢？4如果编码的对象是m个，二进制码的位数是n位2n≥m9个苹果编码问题十进制数自然二进制数十进制数自然二进制数00000810001000191001200101010103001111101140100121100501011311016011014111070111151111自然二进制编码数字设备多采用二进制011001101100……Binary日常生活多采用十进制0，1，2，3，4，5，6……Decimal用二进制来表示十进制二—十进制编码（BCD码）

十进制数8421码2421码（A）2421码（B）5421码（A）5421码（B）余3码

余3循环码右移码0123456789000000010010001101000101011001111000100100000001001000110100010101100111111011110000000100100011010010111100110111101111000000010010001101000101011001111011110000000001001000110100100010011010101111000011010001010110011110001001101010111100001001100111010101001100110111111110101000000100001100011100111101111101111001110001100001常用BCD码常用BCD码ASCII码AmericanStandardCodeforInformationInterchange美国信息交换标准代码ISO码InternationalOrganizationforStandardizationCode国际标准化组织码0201字符编码b7b6b5b4b3b2b100000101001110010111011100000001001000110100010101100111NULSOHSTXETXEOTENQACKBELDLEDC1DC2DC3DC4NAKSYNETBSP！“#$%&,01234567@ABCDEFGPQRSTUVW′abcdefgPqrstuvw10001001101010111100110111101111BSHTLFVTFFCRSOSICANEMSUBESCFSGSRSUS()*+,_./89:;<=>?HIJKLMNOXYZ[\]Λ-hIJklmnoxyz{|}~DELASCII码b7b6b5b4b3b2b100000101001110010111011100000001001000110100010101100111NULSP$%01234567ABCDEFGPQRSTUVW10001001101010111100110111101111BSHTLFCREM()*+,_./89:=HIJKLMNOXY