{"id":118,"date":"2015-09-01T16:07:00","date_gmt":"2015-09-01T16:07:00","guid":{"rendered":"http:\/\/machineryequipmentonline.com\/video-equipment\/uncategorized\/dvdpes-packet-construction\/"},"modified":"2015-09-01T16:07:00","modified_gmt":"2015-09-01T16:07:00","slug":"dvdpes-packet-construction","status":"publish","type":"post","link":"http:\/\/machineryequipmentonline.com\/video-equipment\/dvdpes-packet-construction\/","title":{"rendered":"DVD:PES packet construction"},"content":{"rendered":"<div class=\"ovwey6a0dbe3610381\" ><script type=\"text\/javascript\">\n\tatOptions = {\n\t\t'key' : '61e5902552e2353963d8d2f1bd1f4a8f',\n\t\t'format' : 'iframe',\n\t\t'height' : 250,\n\t\t'width' : 300,\n\t\t'params' : {}\n\t};\n<\/script>\n<script type=\"text\/javascript\" src=\"\/\/www.highperformanceformat.com\/61e5902552e2353963d8d2f1bd1f4a8f\/invoke.js\"><\/script><\/div><style type=\"text\/css\">\r\n@media screen and (min-width: 1201px) {\r\n.ovwey6a0dbe3610381 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.ovwey6a0dbe3610381 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.ovwey6a0dbe3610381 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.ovwey6a0dbe3610381 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.ovwey6a0dbe3610381 {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n<h3 align=\"justify\">PES packet construction<\/h3>\n<p align=\"justify\">A DVD\/HD DVD PES packet contains 2 kB of user data such as video, audio and sub-picture information. The user data is preceded by a header and followed by a 4-byte error detection code (EDC) as illustrated in Figure 20.7 to form a packet, also known as a sector. However, before the header and the EDC bytes are added, the 2 kB user data bits are scrambled. Scrambling avoids long strings of zeros to ensure that energy is evenly spread.  <\/p>\n<p align=\"justify\">The header consists of three sections: a 4-byte ID section (consisting of a 3-byte sector number and 2-bytes of error detection for the sector number) and 6-byte copy protection information.  <\/p>\n<p align=\"justify\">As stated earlier, to improve error correction, BD format employs the MPEG-2 transport stream in which the PES packets are further divided into 188-Byte transport packets as is the case with digital television broadcasting.  <\/p><div class=\"ubszu6a0dbe361050c\" ><script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-0778475562755157\"\n     crossorigin=\"anonymous\"><\/script>\n<!-- 300x600 television-and-video -->\n<ins class=\"adsbygoogle\"\n     style=\"display:inline-block;width:300px;height:600px\"\n     data-ad-client=\"ca-pub-0778475562755157\"\n     data-ad-slot=\"6549443290\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script><\/div><style type=\"text\/css\">\r\n@media screen and (min-width: 1201px) {\r\n.ubszu6a0dbe361050c {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.ubszu6a0dbe361050c {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.ubszu6a0dbe361050c {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.ubszu6a0dbe361050c {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.ubszu6a0dbe361050c {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n<div class=\"famlq6a0dbe3610452\" ><script type=\"text\/javascript\">\n\tatOptions = {\n\t\t'key' : '0c1eb4c533eaedb7b996f49a5a4983a9',\n\t\t'format' : 'iframe',\n\t\t'height' : 300,\n\t\t'width' : 160,\n\t\t'params' : {}\n\t};\n<\/script>\n<script type=\"text\/javascript\" src=\"\/\/www.highperformanceformat.com\/0c1eb4c533eaedb7b996f49a5a4983a9\/invoke.js\"><\/script><\/div><style type=\"text\/css\">\r\n@media screen and (min-width: 1201px) {\r\n.famlq6a0dbe3610452 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 993px) and (max-width: 1200px) {\r\n.famlq6a0dbe3610452 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 769px) and (max-width: 992px) {\r\n.famlq6a0dbe3610452 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (min-width: 768px) and (max-width: 768px) {\r\n.famlq6a0dbe3610452 {\r\ndisplay: block;\r\n}\r\n}\r\n@media screen and (max-width: 767px) {\r\n.famlq6a0dbe3610452 {\r\ndisplay: block;\r\n}\r\n}\r\n<\/style>\r\n\n<h3 align=\"justify\">Forward error correction\u2014DVD\/HD DVD<\/h3>\n<p align=\"justify\">Digital signals, especially those with a high level of compressions, require an efficient error-correction capability. Apart from normal errors of prop- agation and processing, errors may occur as a result of dust or physical damage to the surface of the disc causing video or audio break-up or dis- ruption. To avoid such errors, powerful FEC techniques are employed which can correct a burst error length of approximately 2800 bytes, corresponding to a physical damage of up to 6.0 mm. More stringent error- correction methods are used for the BD formats because of BD\u2019s higher sensitivity to scratches and fingerprints.  <\/p>\n<p align=\"justify\">Data is structured into blocks of 32 kB (DVD\/HD DVD) and 64 kB (DB) of user data arranged in rows and columns. Following row interleaving, error-correction rows and columns are added to form recording or physi- cal sectors (Figure 20.8).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PES packet construction A DVD\/HD DVD PES packet contains 2 kB of user data such as video, audio and sub-picture information. The user data is preceded by a header and followed by a 4-byte error detection code (EDC) as illustrated in Figure 20.7 to form a packet, also known as a sector. However, before the [&hellip;]<br \/><a href=\"http:\/\/machineryequipmentonline.com\/video-equipment\/dvdpes-packet-construction\/\" class=\"more-link\" >Continue reading&#8230;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"aioseo_notices":[],"views":602,"_links":{"self":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/posts\/118"}],"collection":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/comments?post=118"}],"version-history":[{"count":0,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/posts\/118\/revisions"}],"wp:attachment":[{"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/media?parent=118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/categories?post=118"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/machineryequipmentonline.com\/video-equipment\/wp-json\/wp\/v2\/tags?post=118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}