Lupus
Honorary Master
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- Apr 25, 2006
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Broadcast standard[edit]
An example frame of poorly deinterlaced video. Despite the fact that most TV transmissions are interlaced, plasma and LCD display technologies are progressively scanned. Consequently, flat-panel TVs convert an interlaced source to progressive scan for display, which can have an adverse impact on motion portrayal.
Within the designation "1080i", the i stands for interlaced scan. A frame of 1080i video consists of two sequential fields of 1920 horizontal and 540 vertical pixels
https://en.wikipedia.org/wiki/1080i
The keyword in there is sequential, which means that it's 540 vertical pixels followed by another in quick succession, which gives you an image of 1080 which isn't progressive where you get all of them at once.