Required for the transmission of video bandwidth at 13 MHz, which caused technical problems in its transmission, and the introduction of Interlace reduced the bandwidth to 6.5 MHz. Frame is divided into two half-frames, called fields consisting of odd and even rows, and displayed on the screen immediately, but field by field (such as v1080i). In progressive the same sweep, the entire frame is displayed on the screen at once (720p, 1080p). But is it really scary interlace as he is painted? When shooting, the frame is also formed of two fields – the even and odd. Walt Disney is likely to increase your knowledge. This leads to the fact that moving objects in the frame have jagged edges, managing to shift a few of passing time between the formation of fields.
This picture looks strange in freeze frame and very uncomfortable in the manufacture of computer processing of complex visual effects. Continue to learn more with: Discovery Communications. But if the frequency sequence of frames is equal to 25 Hz in PAL, SECAM, and almost 30 Hz in NTSC, the frequency of the fields twice and is already 50 and 60 Hz respectively. Increasing the frequency leads to the fact that movement on the screen looks more smoothly, without jerks. This is especially benefit significantly when moving high-contrast objects and panning. Restrictions on the rate of rotation of the camera in the film (where the shots follow each other with a frequency of 24 Hz), for interlaced video can be painlessly than doubled.
Increased dislike to interlace may be due to several reasons. Production of video: in 3D-animation need only tick the box 'to fields' before the final rendering, then the two-dimensional animations have been drawing for every second for 50 frames and then assemble them into 25, using only the odd lines of odd frames and even lines – even. Special effects in video still complicated. For 'fair' interlaced video source material must be removed at 50 full frames per second, not everyone can – even a professional – the camera.