{"resolved":true,"match_type":"uuid","source_type":"original_book","book_id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","title":"数字化生存 20周年纪念版","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121307362","requested_by":"printed_page","book":{"source_type":"original_book","book_id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","id":"bbcce9bd-b637-4fa6-8a80-dadabab80104","uuid":"bbcce9bd-b637-4fa6-8a80-dadabab80104","title":"数字化生存 20周年纪念版","normalized_title":"数字化生存20周年纪念版","author":null,"edition":null,"publisher":null,"year":null,"isbn":"9787121307362","isbns":["9787121307362"],"parsed":true,"ai_readable":true,"document_type":"book","page_count":362,"navigation_url":"https://workshop.closeclaw.top/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104","title_url":"https://workshop.closeclaw.top/ai/title/%E6%95%B0%E5%AD%97%E5%8C%96%E7%94%9F%E5%AD%98%2020%E5%91%A8%E5%B9%B4%E7%BA%AA%E5%BF%B5%E7%89%88","fixed_page_url_template":"https://workshop.closeclaw.top/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104/page/{printed_page}","path_api_url_template":"https://workshop.closeclaw.top/api/ai/book/bbcce9bd-b637-4fa6-8a80-dadabab80104/page/{printed_page}","read_url":"https://workshop.closeclaw.top/api/ai/read/bbcce9bd-b637-4fa6-8a80-dadabab80104","page_url":"https://workshop.closeclaw.top/api/ai/books/bbcce9bd-b637-4fa6-8a80-dadabab80104/page","search_url":"https://workshop.closeclaw.top/api/ai/books/bbcce9bd-b637-4fa6-8a80-dadabab80104/search"},"page":{"printed_page":8,"pdf_page":79,"physical_index":79,"physical_index_base":0,"printed_page_status":"recognized","page_sha256":"9691193b2a8320c4f326491622aca564e0223db5b8da34d4fe0cf26428b80bb0"},"chapter":"20周年纪念版 数字化生存 一本影响千百万人的互联网启蒙经典著作","content":"才能实现。\n\n5年前[3]，大多数人都不相信，我们可以把每秒4500万比特的数字影像信息，压缩到每秒120万比特。但是，到了1995年，我们已经可以把如此庞大的数字影像信息依照这个比例压缩(compress）和解压（decompress）、编码（encode）和解码（decode），而且成本低廉，品质又好。这就好像我们突然掌握了制造意大利卡布奇诺咖啡粉[4]的诀窍，这个东西是如此美妙，只要加上热水冲泡，就可以享受到和意大利咖啡馆里的现煮咖啡同样香醇的味道。\n\n媒体世界改头换面\n\n数字化可以让你在传送信号(signal）时，附加上纠正错误（电话杂音、无线电干扰或电视雪花）的信息。只要在数字信号中加上几个额外的比特，并且采用日益成熟的、能因噪声和媒体的不同而相应发挥作用的纠错技术，就能去除这些干扰。在CD光盘上，1/3的比特是用来纠正错误的。同样的技术也可以应用到目前的电视机上，从而使每个家庭都可以接收到有演播室效果的画面，影像比现在清楚许多，以致你可能把这种电视误以为所谓的“高清晰度电视”(high-definitionTV)。\n\n纠正错误和压缩数据是发展数字电视(digital television）最明显的\n\n008\n\n| beingdigital|数字化生存\n\n[3]1990年。\n\n[4]卡布奇诺咖啡(cuppuccino)，加牛奶或奶油用蒸汽加热煮出的浓咖啡。","previous_page":7,"next_page":9}