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 (see image below).

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).







Tapeless Add-On
In 2004, this Focus Enhancements module let professional JVC DV camcorders record directly onto a hard disk, thus eliminating the tape-to-computer disk conversion step. DTE stands for "direct-to-edit."
References in periodicals archive ?
Mini DV tape or a disk for a DVD camcorder is something people will want to get without the hassle of a drive to a mall, a long walk from a parking lot, a navigation of a maze of aisles and a long in-store wait," Brinkman comments.
In addition to printing back to DV tape and saving in AVI or VideoCD MPEG-1 formats, muvee autoProducer DVD Edition now lets users save their finished productions as DVD-ready MPEG-2 files, which they can either play back on their PCs, or drag and drop into any external DVD-authoring program to be authored onto DVD-R/RW media.
Actual filming requires an iMac computer (or a comparable PC), digital camera, DV tape and tripod.
Once the video is completed, users can save it on a DV tape, or digitize it in an MPEG or Real Video format.
Offering both the advantages of P2HD solid-state variable speed acquisition and a mini DV tape mechanism, the HVX200A is ideal for producers and educational institutions that are transitioning from an older standard definition, tape based infrastructure to file based, high definition production.
It gives a choice of recording on to a memory card or a DV tape and has a Gamma Correction function which increases contrast and detail in dark conditions.
For added flexibility, the HVX200 is also equipped with a Mini-DV tape drive for shooting 4:3 and 16:9 images on DV tape in 60i, 30p and 24p.
Submissions may be a maximum of four minutes long, and, if accepted, may be delivered in DVD or DV tape format.
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.
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.