Progressive scan
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The progressive scan (pɹəˈɡɹɛsɪv skæn) is a technique used in the image composition of monitors, beamers and other display devices, in which the output device - unlike the interlaced scan - is not sent line-interlaced fields, but is fed with real full images. This gives the picture a sharper and smoother appearance and completely eliminates line flicker. TVs need either an analog VGA or YPbPr (component video) input or a digital DVI, DisplayPort or HDMI connection to transmit this signal.
There are two ways to transmit full frames: as a whole (progressive) or as two consecutive fields with the same time index (progressive with segmented frames, psF). With the second method, the simple deinterlacing method Weave must be applied before display. This also works with conventional transmission methods such as PAL, SECAM or NTSC by means of a simple additional signal and is also used by DVD players and game consoles. The HDTV format 1080i is also used in this mode, whereas 720p is transmitted with real full frames if the TV cameras also record in 720p mode. Since the amount of data transmitted remains about the same for both, the higher line or vertical resolution (so-called Full HD) halves the temporal resolution.
For the future UHD TV, only full-screen recording and playback is planned (2160p50 or 60), but in the test environment without full HDMI2.0 interfaces, the temporal resolution must still be limited to 25 or 30 BpS due to the limited HDMI1.4 data rate. Decoders for the full scope of UHD-1 (4:2:2 with 10-bit color resolution, 50/60 BpS) will not be available before 2017/18.
