The Digital Fact Book - Quantel

HDShort for HDTV.HHDCAMAssigned D11, this is a series of Sony VTRs based on the Betacam principles for recordingHD video on a tape format which uses the same style of cassette shell as Digital Betacam,although with a different tape formulation. The technology supports 1080-line standards.Various methods are believed to be used to reduce the video data including pre-filtering,DCT-based intra-frame compression and sampling at around 3:1:1. Together these are saidto provide data reduction of between 7 and 10:1. Four non-compressed audio channelssampled at 48 kHz, 20 bits per sample, are also supported. One variation, CineAlta, is aimedat addressing the needs of digital cinematography.HDCAM SR is further extension of Betacam recorders using mild MPEG-4 Studio Profile(SP) intra-frame compression to store full bandwidth 4:4:4 HD RGB 1080 and 720-linevideo offering more headroom for digital cinema users, as well as 4:2:2 Y,Pr,Pb componentvideo for television. It offers video data rates of 440 Mb/s and 880 Mb/s, and more audiochannels than other currently available. It is scalable in its pixel count (SDTV, HDTV,film-resolution data), bit depth (10- or 12-bit), and color resolution (component or RGB).The Sony F950 camera provides suitable RGB sources for this, including undercranked footage.The close-to-raw-state RGB material is well suited to the needs of digital cinematographyas the full latitude and bandwidth of the pictures is preserved through recording.See also: 24PsF, CineAlta, D11Website: www.sonybiz.net/hdcamsrHDCPHigh-bandwidth Digital Content Protection was designed by Intel to protect digitalentertainment content across DVI or HDMI interfaces.See also: HDMIWebsite: www.digital-cp.comHD D5A D5 VTR adapted to handle high definition signals. Using around 5:1 compression the signalsconnect via an HD-SDI link. HD D5 can be multi-format, operating at both SD and HD TVstandards. It can replay 525-line D5 as well as HD D5 cassettes. Formats include 480/60I,1080/24P, 1080/60I, 1080/50I, 1035/59.94I and 720/60P. The recorder can also slewbetween 24 and 25 Hz frame rates for PAL program duplication from a 1080/24P master.Cassette recording times vary according to format, the longest is 155 minutes for 1080/24P.Website: www.panasonic-broadcast.com98