Launchpad: Click on items.
In the early 90s, sales for higher end consumer and prosumer video equipment
started to flatten. Something had to be done. A better mousetrap needed to be built.
To avoid a replay of the grueling standard wars, 55 companies formed a consortium and
embarked on the development of a new digital video format. The format was first called DVC
(as in Digital Video Cassette), later it was called simply DV. (As in Definitive Video ...
just kidding). Launched in late 1995, it became an instant success. Here's how it works
After launching their very successful VX1000
(and their less successful VX700), Sony
"passport-sized" PC-7. It became an instant success.
Panasonic's AG-EZ1U DV unit
Frustrated when going from DV to DVCAM? Defeat the DSR-30 AudioLock with switchcraft.
What Is DV? (DVC? DVCAM? DVCPRO?)
The definitive paper answering this question has (again) been written by Roger
Jennings. Under the unassuming title Consumer
and Professional Digital Video Recording and Data Formats, Roger describes
everything from cassette dimensions to esoteric issues like isochronous transmission and
Reed-Solomon error detection and correction coding.
Some people claim that DV is a video format which escaped the labs prematurely,
before marketing managers could "dumb it down". Companies with an
established presence in the industrial video and professional area quickly saw the sales
of their higher priced units dwindling as organizations like CBS or BBC started buying VX1000s in
wholesale fashion. "Professional" variants of DV were invented. And we had
a format war after all. DVCPRO
was sent into battle by Panasonic in 1995, followed one year later by Sony's DVCAM. The
formats sound alike, they basically use the same video and audio encoding format as the
consumer DV format. But they have subtle and not-so-subtle differences in speed, makeup
and track pitch of the tapes being used. Of course, they also cost significantly more than
the consumer models. To "differentiate" the products even more, Sony
invented some hurdles which can prevent copying from DV to DVCAM via Firewire.
But these hurdles have been overcome by Adaptec
in software and by readers of the DV-L list through some ingenious switchcraft.
Roger Jennings discusses and compares the two formats. No holds barred.
Do you rrrreally want to know what DV is?
Honestly? All the gory details? Down to the nitty-gritty? Then you must have the
(in)famous Blue Book, which lays down the DV standard. The Brue ..err. Blue
Book costs around $500 (depending on the yen / greenback ratio) and can be obtained from:
File keeper of dissolved HD Digital VCR conference
(yes, that's his official title -- ain't it amazing?)
c/o Research Administration Department
AVC Products Development Lab
Matsushita Electrical Industrial Co., Ltd.
2-15 Matsuba-cho, Kadoma-shi, Osaka 571, Japan
The contents is a bit challenging. You have been warned. Apparently, Tsunoo-San
isn't wired. Snailmail or phone must do.