What is the 1080i video?
1080i video is a video format category. The 1080 number concerns the number of lines of vertical resolution in one video frame and i represents a pattern of interlaced scanning. Video 1080i is one of the available HD (high -resolution) TV modes.
The formula of the interlapse of the scanning used by the 1080i video was designed to improve compared to older scanning methods that displayed the image by screening a single line of pixels, each line below the previous one until the entire surface area of the screen was filled. Scan scanning of interleaving and displaying only odd lines of frame, followed by 1/30 of the second of even lines that are projected in the gaps left from the previous scan. Because human vision works by retaining images for a short time in the brain or retina, the process of interleening scanning causes two separate scanning of the image as one frame. In the case of 1080i video, this means there are two fields of 540 lines that are VNImna as one picture of the video. Scanning of 60 fields per second instead of 30 full frames per second has numerous advantages, especially less flicker, improved details, and lowering the bandwidth used by half.
1080i Video works well for older TVs Ray tubes (CRT). However, the device needed to coded the interlaced images is expensive and complex. Newer formats of progressive scanning are cheaper and offer no flashing or increased vertical resolution. Progressive scanning shows broadcast images by drawing each row of the frame in the sequence. The difference between this method and older scanning methods that required interleaves are that television technology has surpassed the cathode ray tube.
newer LCD or plasma TVs are progressive in nature because, unlike CRT, they do not read the image on the screen but randomly contain lamps that are sowedthey are shaking to create a picture. These TV sets must convert 1080i video to 1080p - letter p behind "progressive". If they do not overwhelm the 1080i video, these sets already display images at the sharpest resolution, 1080p.
While the latest TVs can display 1080p video, their source material has yet to achieve this level of resolution. High -resolution broadcasting is still mostly in the 1080i video format. In addition, these 1080p sets are not equipped to receive a signal outside of 1080p, so even if consumers can pay the highest dollar for the latest television technology, they will not be able to fully use the transmitters and DVD manufacturers start 1080p. Video 1080i will therefore remain a viable format until it happens.