Carroll Community CollegeThe Carroll Community College
It'?s eight a day a week: A digital memory for mail: That' s never enough
The requirements for storing data digitally in post-production are as diverse as the facilities themselves. However, although the boundaries between digitial data and digitial data are blurring, the key questions of digitial data retention are still constant: capability, performance, reliability and data management. "There are three layers of fundamentals of storage within videopost," says CharlesEaton, VP of Engineer at Crawford Communications in Atlanta; "the workstation layer, the medium- or short-term common layer, and the archive.
" General daily work is done at the "workstation" layer, i.e. on the system harddisk, directly on the computer being used, or from share partitions in a LAN. The system volume must have at least enough room for the operating system and the applications and some storage capacity for the cyberspace.
If the same disk can be used to store the asset and the final result of a jobs will depend on the amount of the jobs itself. The determination of sufficient capacities calls for an evaluation of the needs of each individual and the type of generated electronic data file. Editing list, sequencing statements, texture, wireframe models and animated data will all be part of the projects file, which can vary in file sizes from a few hundred kilobyte to a few megabyte.
The final images, picture strings or even resulting videos, however, use up the lion's share of available memory. In the high-end range, incompressed binary videos require approximately 27 megabytes per second1. The megabytes per second relationship for packed data types such as MJPEG or QuickTime Movie depends on the amount of data that is being processed.
Henninger in Arlington, Virginia, performs 2D and 3D designs on a wide range of Power Macs, each with its own 2GB to 4GB SCSI-2 system drives. Abeka' s discus DVRs are used to transfer the completed frame, graphics element and sequence directly to the Quantel Henry and Editbox.
From a historical point of view, the core of the DDR was the DDR or DVR. As a fast, purpose-built propulsion system that can play back 30 frames per second image sequence, the GDR quickly found a home in any larger institution as a common, short-term memory unit for just watching it. Your bases typically delivered only 30 to 60 seconds of non-compressed film.
The Grace & Wild Studios in Farmington Hills, Michigan, uses two VideoSPACE DVRs from Pluto Technologies for a combined output of one and a half hours of non-compressed DVR, but continues to operate12 Abeka's A66 and A60 GDRs, each with approximately 50 seconds of memory. "We' re broadcasting it almost 15 to 20 mins of the final working days, created and called by Flint working artist, 3-Danimator on NT workstation, cinema animator, Mac artist and Avid editor.
" Also Crawford Communications uses three Pluto VideoSPACE Recorder with a combined 1 hr and 20 min memory onboard. "The way Grace & Wild has placed Pluto in its surroundings so that several artist and editorial staff can shoot directly on it provides an insight into a possible forward-looking vision of how to produce digitally produced film.
"We have installed a Fibre Channel backbone, so we no longer need to use a videoserver," says Chris Nichols, director of engineering. At a transmission rate of 100 megabytes per second, non-compressed brushless videos are saved in a central location and are available to every workplace in near-realtime. Charles Eaton of Crawford adds: "We have AMPEX'refrigerators' and StorageTek'silos' for most DVCV.
" And Tektronix also provides a high-quality, high-performance DVR in its Profile line of videoservers. "Century currently uses an Abekas DDR and Pellegrino has adapted a Windows NT RAID arrays based on Seagate and Micropolis disks for its Power Macs and DEC Alpha NT computers.
Cheaper HD-1 resolution DVD recorder options are also available via add-on cards for Windows NT workstations. Like the Hollywoodfrom DPS, these cards take full benefit of the popular Near Width Screensaver like the Seagate Barracuda. "We' re doing a great deal of flame work and spending directly on D-1 and D-Betacam, but we added Hollywood as GDR," says Colin Withers, TechnicalDirector of Topix/Mad Dog in Toronto, Ontario.
Although not yet available at Fibre Channel rates, Nichols has integrated MicroNet DataDock drives into a number of different types of workstation, among them Hollywood. This allows an performer to easily disassemble the videodrive sub-system and take it to and reinstall it on a workstation in less elapsed times than the videotape would have been transmitted at the current 100Mbps networking slow.
The default storage capacities for discrete disks currently range from 2-9 GB. Vendors such as Seagate and Quantum have raised the benchmark by recently launching 18 GB of high-speed diskdrivers. Also, and, dependant on the operating system, the disks can have a wide range of ports from EIDE to Ultra Wide SCSI and can be a stand-alone disk device or an arrays with a device that can be used as a seeidebar for definition and throughput.
Seagate 2GB RAID arrays of disks provide common space for a wide range of platforms at Diamond Studios in Birmingham, Alabama. The Jaleo itself has a range of 12 9GB hard disks that can deliver three D-1 streams in one. AnimZone, a three-man digital movie and animated store in Roanoke, Virginia, uses a SCSI-2 string of six 9GB Seagate NV digital movie recorders.
"We' re using NewTek's flyer for all our videos," notes proprietor Carl Shermat. "We' also have a few 233MHz Pentiums and Amiga4, 4,000s for animations rendering to a 2. 2GB Quantum-disk. "Preconfigured enterprise solutions such as Avid and Quantel deliver turnkey solutions for storing partitions.
Your system OS and softwares are on the system drive and the entire content of the DVD is recorded and played back by a unique disc-array. 5 -inch magnet HDDs like the Seagate Barracuda, but optimized by customer -specific interface and controller softwares. Capacities are expressed in just a few seconds, not in a megabyte or gigabyte.
The throughput is determined by the velocity of the actuators and the interface connection between the actuator and its hosting system as well as the paths between the various sys-tems. For streaming non-compressed videos in live, you need an interface that is more than 27 megabytes per second, such as Ultra SCSI, and a hard disk that can maintain a transmission or writing ratio of more than 2 megabytes per second.
The management of memory assignment for an enabled projects is usually shared between the operator and the coordinator. DAT, Exabyte and DLT data repositories are favourite archive mediums for short-term use. From 25GB to 50GB, a stand-alone cassette can hold up to half an hours of non-compressed binary film. "One of the problems users experience when running ArenaStore from LDL is the amount of elapsed for reading the index of saved data sets.
The Iomega Zip and Jaz hard drives are often used for storing small datasets and sharing between workstations. From 100MB to 2GB, they can process most projects and small off-frame workflows. "We back up images and images to DAT or Jaz while working on a project," says Jeffrey Pittle, artistic direction at NiteLite Studios in Pompano Beach, Florida, "but when the job is done, the definitive animations or commercial will be stored on Digital Betacam.
" Completed shows or commercials are often filmed on video tape. A lot of institutions like Nite Lite, Stages Of Design and Diamond Studios file digitally beta cam, while Topix uses D-1 and Grace&Wild D-5. High-volume high-speed HDDs have never been more affordable, the price per MB is now around nine eurocents, which is expected to fall to around two eurocents per MB by the year 2000.
Highspeed hard drive and networking ports now significantly surpass the 4MB perspective and reach up to 200MB per second with binary fibre channel. TrueD-1-quality videoboards have exceeded the $10,000 mark. "Erich Spencer is the new press manager of Gra8, a communication company in Baltimore, Maryland. As an Emmy Prize winner and manufacturer, Erichalso is teaching computer graphic and web design at Carroll CommunityCollege.
In order to help you decode the many shortcuts, variants and abbonyms in the memory world, here is a fast dictionary and a chart of common file-formatting. DDS - Logging of your personal information. DLT - Linear band. This is an ultra robust, fast and powerful database file system. Favourite for making backups of your videos. This is a disc that is also known as a DVC.
This is an ophthalmic memory device for use in computer equipment (DVD-ROM) and for the reproduction of videos for the end user (DVD-Video). Capable of recording two hour of MPEG-2 compressed program footage. Genuine Abekas file transfer discs. Redescribable disk size. Replaces the QIC (Quarter Inch Cartridge) band size typically used for backing up your workstations.
Transmission speed - The speed at which it is possible to write or write to or from ad-rive. Typically in MB/s (Megabytes per second), Mb/s (Megabitsper second), KB/s (Kilobytes per second) or Kb/s (Kilobits per second) depending on disk specification.