The Digital Fact Book - Quantel

WORMWrite Once/Read Many – describes storage devices on which data, once written, cannotbe erased or re-written. This applies to some optical disks that offer high recording densitiesand are removable, making them very useful for archiving. CD-R and DVD-R are examples.See also: Optical disksWYSIWYGWhat You See Is What You Get. Usually, but not always, referring to the accuracy of a screendisplay in showing how the final result will look. For example, a word processor screenshowing the final layout and typeface that will appear from the printer. Or in an edit suite,does the monitor show exactly what will be placed on the master recording? This subjectrequires more attention as edited masters are now commonly output to a wide variety of‘deliverables’ such as SD video, HD video, DVD, VHS, digital projection and film. Issues suchas color, gamma and display aspect ratio may need consideration.See also: Color ManagementXDCAMSony camcorder products that use its Professional Disc (PD) technology, an applicationof Blu-ray Disc, as the recording medium. The product range includes camcorders, mobileand studio decks which are designed to take advantage of the size, weight, data speedand re-record features of the PD technology.XDCAM camcorders use the DVCAM codec and record SD 4:1:1 (480-line) and 4:2:0(576-line) video at 25 Mb/s onto a PD.XDCAM HD camcorder images are native 1440 x 1080 and can be recorded as HDV:1080/59.94I, 50I, 29.97P, 25P, and native 23.98P video using MPEG-2 MP@HL withcompression and 4:2:0 sampling. Users can select 35 (HQ), 25 (SP), or 18 (LP) Mb/sbit rates according to picture quality and recording length requirements – ranging from60 to 120 minutes. There are four channels of 16-bit, 48 kHz audio.XDCAM EX takes the same ideas but records to solid state storage in place of Blu-ray disc.See also: Professional DiscWXX´Y´Z´A mathematically defined absolute color space, CIE X´Y´Z´, also known as CIE 1931 colorspace, was created by the International Commission on Illumination (CIE) in 1931. It wasnot heard much of in the digital media industry until X´Y´Z´was selected by DCI as thecolor space for digital cinema.181