{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"38270854-596f-4a26-8183-db8c968c6020","id":"38270854-596f-4a26-8183-db8c968c6020","uuid":"38270854-596f-4a26-8183-db8c968c6020","title":"编码 隐匿在计算机软硬件背后的语言","normalized_title":"编码隐匿在计算机软硬件背后的语言","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121181184","isbns":["9787121181184","0123456789","6044921875","3039331000","0000000000","0000000000000"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":438,"navigation_url":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020","title_url":"https://workshop.closeclaw.top/ai/title/%E7%BC%96%E7%A0%81%20%E9%9A%90%E5%8C%BF%E5%9C%A8%E8%AE%A1%E7%AE%97%E6%9C%BA%E8%BD%AF%E7%A1%AC%E4%BB%B6%E8%83%8C%E5%90%8E%E7%9A%84%E8%AF%AD%E8%A8%80","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/38270854-596f-4a26-8183-db8c968c6020/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/38270854-596f-4a26-8183-db8c968c6020","page_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/page","search_url":"https://workshop.closeclaw.top/api/ai/books/38270854-596f-4a26-8183-db8c968c6020/search"},"page":{"printed_page":78,"pdf_page":94,"physical_index":94,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"7d2fdefee6ea23ffceffc919f32dae99f2ea1985a5289d298035c2f4de8d55fc"},"chapter":"编码隐匿在计算机软硬件背后的语言","content":"但是，如果他遇到了一部连半颗星都不值得给的电影，他就决定给它没有星的级别(ATOMIC BOMB？)，这时他就得再添加一个比特位了。因为已经没有三个比特位的代码可以用了。\n\n《娱乐周刊》杂志常常举行一些评级活动，评级的对象除了电影之外还有电视节目、CD、书籍、CD-ROM、网站等其他一些东西。等级的范围是从A+\\~F（尽管似乎只有波利·舒尔的电影才能堪此殊荣)。计算一下，一共有13个可能的等级。我们需要用4个比特位来表示这些等级。\n\n$$\n\\begin{array} { r l } & { \\mathsf { m o n } = \\mathbf { F } } \\\\ & { \\mathsf { m o n } = \\mathbf { N } . } \\\\ & { \\mathsf { m o n } = \\mathbf { D } . } \\\\ & { \\mathsf { m o n } = \\mathbf { D } . } \\\\ & { \\mathsf { m o n } = \\mathbf { D } . } \\\\ & { \\mathsf { o n } = \\mathbf { C } . } \\\\ & { \\mathsf { o n } = \\mathbf { C } . } \\\\ & { \\mathsf { o n } = \\mathbf { D } . } \\\\ & { \\mathsf { o n } = \\mathbf { D } . } \\\\ & { \\mathsf { m o n } = \\mathbf { B } . } \\\\ & { \\mathsf { I n o m } = \\mathbf { B } . } \\\\ & { \\mathsf { I n o m } = \\mathbf { B } . } \\\\ & { \\mathsf { I n o m } = \\mathbf { A } . } \\\\ & { \\mathsf { I n o m } = \\mathbf { A } . } \\end{array}\n$$\n\n这里我们有3个编码没有用到，即1101，1110和1111，加上这3个总共有16个编码。\n\n无论何时我们谈到比特，通常所指的都是一定数目的比特位。我们拥有的比特位数\n\n编码隐匿在计算机软硬件背后的语言\n\n78","previous_page":77,"next_page":79}