The Digital Fact Book - Quantel

DVCPRO 50 is a x2 variant of DVCPRO. With a tape speed of 67.7 mm/s, a data rateof 50 Mb/s and using 3.3:1 video compression, it is aimed at the studio/higher qualityend of the market. Sampling is 4:2:2 to give enhanced chroma resolution, useful in postproduction processes (e.g. chroma keying). Four 16-bit audio tracks are provided.DVCPRO HD is a series of HD VTRs that are x2 variants of DVCPRO 50: tape speed135.4 mm/s and a total data rate of 100 Mb/s. Sampling is 4:2:2. There are eight 16-bit,48 kHz audio tracks. Formats supported include 1080I and 720P. This tape format hasbeen assigned as D12. Later versions are using AVC-Intra Compression.DDVCPRO P2 is a DVCPRO recording system. It records the DV data in MXF format onto P2cards which are PC plug-in cards with each carrying four SD (Secure Data) memory chipsto combine capacity and aggregate transfer speeds – currently up to 640 Mb/s, manytimes realtime. The original P2 card offered 2 GB but the capacity keeps doubling so thatnow 32 GB cards are available. These are able to hold 128 minutes of DVCPRO, 64 minutesof DVCPRO 50 and 32 minutes of DVCPRO HD (1080/60I).There is a roadmap of larger P2 cards to be introduced as higher capacity SD memory cardsare launched. 64GB is to be delivered in the third quarter of 2008, and 128 GB (576 minutesDVCPRO) could be expected within a year. Up to five P2 cards can be plugged into somecameras at one time and are hot-swappable to transfer the recoded material for directuse in an edit system. Such workflows, with fast instant random access to the footage,can offer very fast turnarounds that are useful for news.The P2 memory replaces electro-mechanical systems such as video tape or disks. It isrugged: resistant to impact, vibration, shock, dust and environmental extremes includingsudden temperature changes, apparently withstands impact up to 1,500G and vibrationup to 15G and operates in -20 to 60°C.See also: AVC-Intra, INGWebsite: http://panasonic-broadcast.com73