DV

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Related to DV tape: DVCAM, Mini DV

DV

(1) (Digital Video) A generic term for capturing and/or editing video in the digital domain.

(2) (Digital Video) A digital videotape format introduced in 1995 for camcorders. Over the years, DV has been widely used in both consumer and professional applications, and the small MiniDV cartridge was very popular in handheld units. Tapeless DV camcorders have also come on the market using optical discs, hard disks and flash memory cards for storage.

DVCAM and DVCPRO
Soon after DV debuted, Sony and Panasonic introduced their own professional variants geared to make editing easier (see DVCAM and DVCPRO). However, the tape width and encoding format are the same, and the cartridges are mostly interchangeable. In pro models, quality camera lenses and electronics make a difference.

Mini DVD Camcorders
Some camcorders have been built that record onto small "mini DVD" discs. However, DVD and DV are not the same video format, and a mini DVD is a disc, while MiniDV is a DV cassette size (see DVD).

DV Is Standard Resolution (SD)
DV records 720 horizontal pixels and 480 interlaced lines of standard resolution in countries with 60Hz electric current and 576 lines for 50Hz. High-definition versions of DV with 720 and 1080 lines are the official HDV standard and Panasonic's DVCPRO HD (see HDV and DVCPRO).

Compression and Specifications
Depending on the motion content of the scenes, DV provides about a 5:1 compression. It uses the same DCT algorithm as MPEG for compression, but it is easier to edit because each frame is compressed independently without relying on the prior frame (intraframe compression).

Based on the IEC 61834 standard, DV tape moves at a constant rate of 18.8mm per second, providing a data rate of 25 Mbps. The SMPTE 314 standard supports 25 Mbps and provides 50 Mbps for studio use. See Micro DV and SD formats.


DV Cassettes
DV uses 1/4" (6.35mm) metal evaporated (ME) tape, and the large cassette holds 4.5-hours of DV and three hours of DVCAM. MiniDV cassettes hold one hour of DV. DVCPRO metal particle (MP) tapes also come in a mid-size cassette, with varying recording time depending on DVCPRO format (see DVCPRO).







All Sizes
DV camcorders range from handhelds (top) to prosumer models (middle) to professional units (bottom).
References in periodicals archive ?
Furthermore, the HVX200 can downconvert off-speed recordings in 720p recorded on a P2 card and copy it to a mini DV tape.
Submissions may be a maximum of four minutes long, and, if accepted, may be delivered in DVD or DV tape format.
NOTE TO EDITORS: FREE HARD COPY OF THE VIDEO NEWS RELEASE AVAILABLE ON BETA or DV TAPE.
Submissions may be a maximum of four minutes long and, if accepted, can be delivered to in DVD or DV tape format.
In addition, the AG-HVX200 has a Mini-DV tape recording capability that allows customers to shoot 16:9 images on DV tape and edit with existing workflow.
As the price of DV camcorders continues to drop and cameras become more popular, consumers will increasingly want fast conversion of DV tape into MPEG-1 and MPEG-2 files, and the efficiency of real-time encoding is the key,'' stated Alex Weng, Director of Product Planning and the Field Application Engineers (FAE) department of CyberLink.
Programs include AD FullCap(TM) for capturing in AVI or DV formats, Cyberlink PowerDirector(TM) DE for capturing in MPEG format and authoring movies or photo slide shows, Cyberlink PowerProducer(TM) Express for transferring to DVD, SVCD, VCS, DV Tape or streaming video for the Web.
An entire DV tape can be previewed at up to 6 times the normal viewing speed.
The HDR-FX1 shoots 16:9 widescreen high-definition video at 1080i and records video in the new HDV format straight to Mini DV tape.
DV QuickScan: Lets users preview a full length DV tape at up to six times the normal speed, thus, users can easily select and capture specific video segments without manually positioning the tape.