The DVCAM, made by Sony is the professional version of
the DV standard and it utilises the same cassettes as both DV and Mini DV,
but DVCAM has the advantage that it transports the tape 50% faster. As a
result DVCAM has a higher track width of 15 micrometres. DVCAM uses the
same codec as normal DV so the chance of dropout errors with DVCAM is greatly
reduced. DVCAM doesn't allow the same LP mode that regular DV has.
Digital Beta launched in 1993 and replaced Betacam and Betacam SP. Digital
Beta costs significantly less than the D1 format and provides
quality and reliability. Digital Beta S tapes come with up to 40 minutes
running time, whereas the L tapes have up to 124 minutes. The Digital
Beta records a DCT-compressed component video signal. Digital Beta also
has a 5th analogue audio track which is used for cueing, plus it has a
linear timecode track. Digital Beta equipment is the professional standard
in digital video production, and is far superior than cheaper digital
formats, such as DVCAM and DVCPRO. Digital Beta is usually found in a
blue cassette container.
Mini DV cassettes are able to record 60 or 90 minutes of video
on 11 GB of storage space, depending on whether Standard Play
(SP) or Extended Play (Long Play) is used. You can also purchase
80 minutes tapes using a thinner tape, and they can record 120
minutes of footage in either EP or LP mode. Using a home PC
you can record computer data directly on your Mini DV
tape using a camcorder. Using a 60 minutes Mini DV cassette
you can store 13 GB of data. Mini DV L-size cassettes were originally
intended for consumers as a replacement for Blank VHS tapes,
yet are now mostly used by professionals in video production.
Video Tape is a method for recording moving images and sound
onto magnetic tape and replaced Film as the consumer standard
for home recording systems. The recording systems works by having
a helical scan video head rotating against the moving video
tape in order to record the data in two separate dimensions.
As video signals have a high bandwidth static heads would require
high video tape speeds. Both VTRs (video tape recorders) and
VCRs (video cassette recorders) use the video tape format. The
disadvantage with video tape as a recording medium is that is
uses a linear format, meaning that newer digital recording media
provide better quality than video tape. The video tape was first
released in VHS format by JVC in 1976, the rival video tape
Betamax by Sony was released the year before but the VHS format
proved to the superior video tape format.