The Digital Fact Book - Quantel

Digital negativeDigital image material that contains all the detail (spatial and dynamic/latitude) held inthe original camera negative (OCN) film. This allows all latitude headroom to be includedon the material for use in a DI process so adjustments of color and exposure can be madeto the same degree as with film.See also: Camera negativeDDigital-SAssigned as D9, this is a half-inch digital tape format which uses a high-density metal particletape running at 57.8mm/s to record a video data rate of 50 Mb/s. The tape can be shuttledand searched up to x32 speed. Video, sampled at 8 bits, 4:2:2, is compressed at 3.3:1using DCT-based intra-frame compression. Two audio channels are recorded at 16-bit,48 kHz sampling; each is individually editable. The format also includes two cue tracksand four further audio channels in a cassette housing with the same dimensions as VHS.DigitizerA system which converts an analog input to a digital representation. Examples includeanalog to digital converters (ADCs) for television signals, touch tablets and mice. Some ofthese, mouse and touch tablet for example, are systems which take a spatial measurementand present it to a computer in a digital format.See also: A/D, Into digits (Tutorial 1), GUIDigitizing timeTime taken to record existing footage into a disk-based editing system. The name suggeststhe material is being played from an analog source, which it rarely is now. A better termis ‘loading’. Use of high-speed networking may enable background loading – eliminatingdigitizing time at an edit suite.Digitizing time is often regarded as dead time but it need not be. It can be reduced if someinitial selection of footage has been made – for example by logging. Also, footage can bemarked while loading and so be instantly available as a rough cut on completion, so speedingthe final edit. The process is sometimes referred to as Triage, particularly where it is usedto select and pre-edit clips from a live feed.63