{"id":204624,"date":"2017-03-28T14:54:38","date_gmt":"2017-03-28T12:54:38","guid":{"rendered":"http:\/\/mybroadband.co.za\/news\/?p=204624"},"modified":"2017-03-28T15:11:30","modified_gmt":"2017-03-28T13:11:30","slug":"the-difference-between-1080p-and-1080i","status":"publish","type":"post","link":"https:\/\/mybroadband.co.za\/news\/broadcasting\/204624-the-difference-between-1080p-and-1080i.html","title":{"rendered":"The difference between 1080p and 1080i"},"content":{"rendered":"

Display specifications can be complicated, considering there are multiple factors to consider – like resolution, refresh rates, contrast ratio, aspect ratio, display size, and HDR capabilities.<\/p>\n

When looking at TVs and the source signals they receive, a point of contention is the\u00a0difference between 1080p and 1080i, and what it means for the average TV owner.<\/p>\n

Below is a simple explanation of what the differences are and what you need to know about the standards.<\/p>\n

Progressive and Interlaced<\/h3>\n

1080p and 1080i refer to a display resolution of 1,920 x 1,080 pixels, and\u00a0it is the suffixes attached to the resolution number\u00a0that you must pay attention to.<\/p>\n

The “p” in 1080p stands for “progressive”, while the “i” in 1080i means “interlaced”.<\/p>\n

These terms refer to the scanning technique used to display, store, and transmit images.<\/p>\n

Progressive scanning is a common method for\u00a0displaying video, with entire images displayed a certain amount of times per second. This depends\u00a0on the frames per second of the source video and the refresh rate of the TV.<\/p>\n

Interlaced scanning is different, and involves a technique in which alternating halves of an image are displayed per interlacing “field”.<\/p>\n

A single frame of interlaced 1080i video consists of two sequential 1920 x 540 images, with the first field consisting of all odd-numbered vertical pixel lines and the second all even-numbered pixel lines.<\/p>\n

Both these half-images together create a frame every 30th of a second.<\/p>\n

This means if a second of 1080i video consists of 30\u00a0“1,920 x 1,080” frames, it includes 60\u00a0“1,920 x 540 fields”.<\/p>\n

An important note is that when the source video is 1080i\/60, there are in fact no full images – as each of the 60 interlaced fields occupy a different point in time and 30 interlaced frames are displayed per second.<\/p>\n

This results in a slight offset or reduction in quality\u00a0when fast movement is displayed or the video is deinterlaced and viewed\u00a0on a 1080p panel.<\/p>\n

\"Deinterlaced<\/a><\/p>\n

Visual Difference<\/h3>\n

Due to the fidelity and fully-displayed frames, a 1080p video delivers a sharper and more refined image which can provide better quality during scenes with lots of motion.<\/p>\n

Interlaced video suffers in scenes with lots of motion, as it only displays half an image at a single point in time. This makes it difficult\u00a0to display fast movement.<\/p>\n

Compared to progressive scan, interlaced video has more jagged edges and motion artifacts.<\/p>\n

Visual quality of 1080i video can also depend on your TV, as some video processors are better at deinterlacing video than others.<\/p>\n

Broadcast and Decoding<\/h3>\n

Currently, DStv broadcasts in 1080i and 720p, and does not offer Full HD quality.<\/p>\n

Users who use a 1080p TV to watch DStv are in fact watching deinterlaced 1080i video or a 720p broadcast.<\/p>\n

A major reason for 1080i broadcasts is reduced bandwidth requirements and infrastructure limitations.<\/p>\n

DStv\u00a0said<\/a>\u00a0<\/strong>in 2016\u00a0it would not offer Full HD broadcasts any time soon, as their implementation would require changes to broadcast infrastructure and use more bandwidth than the current broadcast resolutions.<\/p>\n

Now read:\u00a0Most-watched TV shows in South Africa<\/a><\/h3>\n","protected":false},"excerpt":{"rendered":"

These are the differences between 1080p and 1080i, explained in simple terms.<\/p>\n","protected":false},"author":341028,"featured_media":193664,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_sma_x_autopost_status":"idle","_sma_x_autopost_error":"","_sma_x_post_id":"","_sma_x_attempts":0,"footnotes":""},"categories":[24],"tags":[41022,16332,2488,35,42234],"class_list":["post-204624","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-broadcasting","tag-1080i","tag-1080p","tag-full-hd","tag-headline","tag-specifications"],"_links":{"self":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/204624"}],"collection":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/users\/341028"}],"replies":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/comments?post=204624"}],"version-history":[{"count":1,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/204624\/revisions"}],"predecessor-version":[{"id":204644,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/posts\/204624\/revisions\/204644"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/media\/193664"}],"wp:attachment":[{"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/media?parent=204624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/categories?post=204624"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mybroadband.co.za\/news\/wp-json\/wp\/v2\/tags?post=204624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}