JVC GY-DV5000U DR-DV5000U DTE Hard Disk White Paper - Page 2

With AV/C control via FireWire, it is possible to control FireStore DR-DV5000 via the DV in/out port on JVC camcorders. In this application, record and record pause can be triggered by the camcorders record button to allow for simultaneous recording to tape and disk. The advantage here is that the videographer does not need to change the way he or she works. Two exact copies of footage are recorded to disk and tape - both with the same video, audio and timecode information. The tape can be archived for later use while the disk becomes the working raw footage master for editing. The other advantage is if there is a problem with the disk, the tape acts as a back up and vice versa. If desired, it is also possible to record to disk only. When DR-DV5000 is used with JVC GY-DV5000 series camcorders, DV input/output, power, control information and disk recorder status is passed between the two devices via an integrated 52-pin connector. This eliminates the need for any external cables between the devices and also allows disk recorder status information (such as record mode and time remaining on disk) to appear in the camcorder's viewfinder. Storage Technologies One of the first questions many people ask regarding disk based video acquisition is what type of storage medium is used. Many different solutions are available including standard DVDs, high performance DVDs, IDE disk drives, FireWire disk drives, custom fixed disk drives and even some technologies that are based on solid state memory. All have their advantages and disadvantages which usually are aspects of cost, storage capacity and performance. If cost is low, storage capacity and performance can suffer while with higher costs comes better capacity and performance. One big advantage of most of the technologies listed above is that their primary market application is the computer industry - which requires improved storage capacities, performance and low costs. One major aspect to consider when evaluating storage technologies is whether the disk recording technology is separate from the actual storage medium. For instance, if a video disk recording device has a fixed or internal disk drive, in order to use the recorded video later in an edit session, it is necessary to transfer the footage to an NLE system. This typically results in a time consuming process. Products with this solution are usually only able to transfer at 2X real time (e.g. 2 hours of video takes 1 hour to ingest into the NLE system). Some devices get around this issue by allowing the videographer to use the disk recording technology and its fixed internal disk drive as a direct source to the NLE itself. This however results in a fairly costly storage solution. These problems are avoided by solutions where the recording technology is separate to the actual removable storage medium. This allows multiple, relatively inexpensive, storage volumes to be used in production sessions. When a fixed or internal video disk recording solution has reached its recording capacity, it is not possible to continue recording without first transferring or