The Digital Fact Book - Quantel

Over samplingSampling information at a higherresolution than is required forthe output format. Forexample,an HD picture can be regarded as an over sampled version of SD. SD pictures createdfrom down res’d HD are generally clearer, cleaner (lower noise) and sharper than thosemade directly in SD. This is because the size reduction process tends to lower noise andthe output pictures are derived from more information than is available in a direct SD scan.An increasing amount of SD material is originated this way. Similarly, 35 mm film providesan over sampled source for SD and HD.P2See DV, INGPackA set of clips, mattes and settings for DVE, color corrector, keyer, etc., that are used togetherto make a video layer in a composited picture. Quantel equipment allows packs to be savedand archived so they can be used later for re-works.OPPALPhase Alternating Line. The analog color coding system for television widely used in Europeand throughout the world, almost always with the 625 line/50 field system. It was derivedfrom the NTSC system but by reversing the phase of the reference color burst on alternatelines (Phase Alternating Line) is able to correct for hue shifts caused by phase errors in thetransmission path.Bandwidth for the PAL-I system is typically 5.5 MHz luminance, and 1.3 MHz for eachof the color difference signals, U and V.Note that the PAL term is frequently used to describe any 625/50I analog format – evenif it is component, or in the 576/50I digital television system where PAL coding is not used.PAL-MA version of the PAL standard, but using a 525 line 60-field structure. Used only in partsof South America (e.g. Brazil).PANPersonal area network used for communicating between computer-based devices,such as phones, mobile TVs and PDAs as well as fixed computers – all within a few meters– and through to other networks – such as The Internet. PANs can be wired, via bussessuch as USB or IEEE 1394, or wireless (WPAN) using technologies such as Bluetooth.138