{"id":1867,"date":"2013-04-10T22:44:44","date_gmt":"2013-04-10T20:44:44","guid":{"rendered":"https:\/\/www.adimec.com\/pros-and-cons-hd-sdi3g-sdi-for-global-security\/"},"modified":"2018-07-27T17:13:11","modified_gmt":"2018-07-27T15:13:11","slug":"pros-and-cons-hd-sdi-3g-sdi-for-global-security","status":"publish","type":"post","link":"https:\/\/www.adimec.com\/ja\/pros-and-cons-hd-sdi-3g-sdi-for-global-security\/","title":{"rendered":"Pros and Cons HD-SDI\/3G-SDI for Global Security"},"content":{"rendered":"
\n

The HD-SDI video interface standard was developed for television broadcasting, but it can be advantageous in global security applications such as high-end surveillance or unmanned systems, allowing simple designs or upgrades with full HD cameras.<\/b><\/p>\n

<\/p>\n

Serial digital interface<\/b>\u00a0(SDI)<\/a> is a family of\u00a0video<\/a>\u00a0interfaces standardized by\u00a0SMPTE<\/a>\u00a0(The Society of Motion Picture and Television Engineers).\u00a0 High-definition serial digital interface<\/b>\u00a0(HD-SDI), and 3G-SDI are related standards offering nominal data rates of 1.485\u00a0Gbit\/s (dual link) and 2.970\u00a0Gbit\/s serial link, respectively.<\/p>\n

These standards are used for transmission of uncompressed, unencrypted digital video signals within television facilities. \u00a0There are coaxial and fiber optic options. \u00a0\u00a0Source: [http:\/\/en.wikipedia.org\/wiki\/Serial_digital_interface<\/a>]<\/p>\n

Versions \/ Standards<\/b><\/p>\n\n\n\n\n\t\n\n\t\n\t\n\t\n\t\n\t
Standard<\/b><\/th>Name<\/b><\/th>Bitrates<\/b><\/th>Example Video Formats<\/b><\/th>\n<\/tr>\n<\/thead>\n
SMPTE 259M<\/a><\/td>SD-SDI<\/td>270\u00a0Mbit\/s, 360\u00a0Mbit\/s, 143\u00a0Mbit\/s, and 177\u00a0Mbit\/s<\/td>480i, 576i<\/td>\n<\/tr>\n
SMPTE 344M<\/a><\/td>ED-SDI<\/td>540\u00a0Mbit\/s<\/td>480p, 576p<\/td>\n<\/tr>\n
SMPTE 292M<\/a><\/td>HD-SDI<\/td>1.485\u00a0Gbit\/s, and 1.485\/1.001\u00a0Gbit\/s<\/td>720p, 1080i<\/td>\n<\/tr>\n
SMPTE 372M<\/a><\/td>Dual Link HD-SDI<\/td>2.970\u00a0Gbit\/s, and 2.970\/1.001\u00a0Gbit\/s<\/td>1080p<\/td>\n<\/tr>\n
SMPTE 424M<\/a><\/td>3G-SDI<\/td>2.970\u00a0Gbit\/s, and 2.970\/1.001\u00a0Gbit\/s<\/td>1080p<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n

Source:\u00a0 Wikipedia (http:\/\/en.wikipedia.org\/wiki\/Serial_digital_interface<\/a>)<\/p>\n

Some global security<\/a> applications are similar to broadcast in that the end user is a display device (as compared to machine vision where a computer is the \u201cconsumer\u201d detecting grey level variations, etc.).\u00a0 The images are used for viewing.<\/p>\n

Many analog systems were developed based on the previous generation SDI standards.\u00a0 HD-SDI and now 3G-SDI allows for an upgrade to full HD digital cameras at fast frame rates. \u00a0For instance, the Adimec TMX6-DHD\/SDI<\/a> offers full color HD images at 30+ fps.<\/p>\n

Here are some of the pros and cons of the HD-SDI interface in global security applications:<\/p>\n

 <\/p>\n

Pros<\/b><\/p>\n