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DVR EXPRESS CORE FEATURES
Video compression has its place with some applications, but when a critical experiment is underway and the best possible video quality is required, experts turn to the DVR Express® Core series. These powerful recorders store high-bandwidth uncompressed video data from one or more cameras, preserving all the detail and dynamic range of the original digital video data. This allows frame-by-frame review of recordings as though each frame is its own still picture. After the recording is complete, clips can be exported into formats that do support compression, such as AVI or JPG, but the original data is always preserved.
NON-VOLATILE SOLID STATE MEDIA
The DVR Express Core incorporates a removable cartridge (Drive Shuttle) holding up to four solid-state drives built with NAND flash technology. Using solid-state media ensures reliable continuous recording with no dropped frames, plus tolerance to shock and vibration. Recording directly to non-volatile storage protects data in the event of a power loss, whereas a RAM-based video recorder would lose the data immediately. Even if no power loss occurs, with non-volatile media there is no download process after each recording finishes (to “save” the recording file) - all frames are already saved the moment they reach the DVR.
COREVIEW DVR SOFTWARE
Easy-to-use CoreView™ software is included with each DVR Express Core, allowing configuration and operation of one or more DVRs. Each camera is shown with an independent display window, and multiple monitors can be used to show each camera full-screen on separate displays. After recording, files can be played back or reviewed frame-by-frame, then exported into commonly-supported image or video file formats including BMP, JPG, TIF, AVI, MOV, RAW and more. A backup feature also allows recordings of one or more camera from one or more DVRs to be saved together in a local file for later review.
All recorded video frames are assigned a digital timestamp which is stored along with each frame’s video data in the recording file. Accurate timestamps allow correlation between recorded video frames and other timestamped data sources. The precision of each timestamp is 100 nanoseconds with a time accuracy of +/- 50 microseconds or better, depending on the master time reference source. This could be the Control PC’s clock or one of many supported IRIG-A/B or GPS receivers. With an IRIG-A/B or GPS receiver, the DVR’s time is updated once per second with a hardware synchronization loop, eliminating any drift over time.
FAST PC CONNECTION
The DVR Express Core is a PC peripheral, connected at all times to a PC for configuration and operation. The high-speed eSATA connection allows plug-and-play connectivity to many laptops, workstations and even single-board computers, without any driver installation required. This interface is used for DVR control commands but also for live video display and file transfers after recordings are completed. So, an interface with high bandwidth is essential. eSATA is ideal for this, but in case no eSATA ports are available, multi-port eSATA add-on cards (up to 16 ports) and even USB 3.0-to-eSATA converters can be used.
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