Searching \ for '[OT] Videobackup' in subject line. ()
Make payments with PayPal - it's fast, free and secure! Help us get a faster server
FAQ page: techref.massmind.org/techref/displays.htm?key=video
Search entire site for: 'Videobackup'.

Exact match. Not showing close matches.
PICList Thread
'[OT] Videobackup'
1998\01\29@153833 by Mike Keitz

picon face
On Thu, 29 Jan 1998 11:41:38 -0600 John Payson <spam_OUTsupercatTakeThisOuTspamMCS.NET> writes:
>> Is anyone interested in backing up data to a standard videorecorder
>> using a PC parallel port and a special designed interface with
>PIC16c84
>
>Such a concept would have been useful a few years ago.

The idea is probably about a week newer than the personal computer and
the VCR.  Over the years, there have been several devices marketed to do
this, but none very successful.   Juno sent me something a few months ago
advertising one.

Nowadays,
>however,
>reasonably-priced tape drives can back up data faster and more
>reliably
>than a consumer-grade VCR.

Especially with advances in recordable optical disks, the use of tape in
general is no longer very viable.  Even a primitive CDR disk, though it
can only be recorded once, costs little and is much more reliable than
any form of tape.

While there may be some merit in the low
{Quote hidden}

The seemingly high speed of VCR tape needs to be considered in light of
by the poor quality of the media.  An agressive error-control strategy
involving interleaved Reed-Solomon recording as well as possibly even
recording the same data twice at different places on the tape should be
used.  Even a very cheap backup system needs to be highly reliable.

This can very quickly require a lot of RAM, though it may be possible to
make the PC do all of the coding and buffering.  A "dumb" interface may
be the only way to go since it needs to be very inexpensive to have much
appeal at all.  It will likely never work except as a dedicated DOS
application since if the processor is away for even a few ms all will be
lost.  So a lot of compatibility and user-interface problems arise.

The Videobackup may be an interesting project, but don't expect to make
any money with it.  Many others have tried.



>

_____________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com
Or call Juno at (800) 654-JUNO [654-5866]

1998\01\29@164621 by William Chops Westfield

face picon face
   Especially with advances in recordable optical disks, the use of tape in
   general is no longer very viable.  Even a primitive CDR disk, though it
   can only be recorded once, costs little and is much more reliable than
   any form of tape.

Yep.  Not to mention being pretty universally readable (without special
software), moderately quick (8MB/minute or so for single speed), and a
convenient size for most personal use.  After much hemming and hawing, I got
a CD-R as my backup device, mostly due to plummeting media costs.

BillW

1998\01\29@175203 by Alexey Vladimirov

flavicon
face
P> On Thu, 29 Jan 1998 11:41:38 -0600 John Payson <.....supercatKILLspamspam@spam@MCS.NET> writes:

P> The idea is probably about a week newer than the personal computer and
P> the VCR.  Over the years, there have been several devices marketed to do
P> this, but none very successful.   Juno sent me something a few months ago
P> advertising one.

Check http://www.arvid.ru for good example of the successful implementation
of the videobackup. They manufacture such devices from 1992 (?), two ISA models
available now, USB version will come in near future. Total volume manufactured
- tens of thousands.

>> VCR backup solutions are a pain in the tusch to use.  If you
>> want to make the thing work at all reasonably, you'll need to have a
>> fair amount of RAM on your encoder/decoder board for buffering [e.g.
>> 1MB] and have it incorporate enough intelligence to read/write large
>> amounts of data unattended.

P> The seemingly high speed of VCR tape needs to be considered in light of
P> by the poor quality of the media.  An agressive error-control strategy
P> involving interleaved Reed-Solomon recording as well as possibly even
P> recording the same data twice at different places on the tape should be
P> used.  Even a very cheap backup system needs to be highly reliable.

ARVID-1052 have the following parameters: 4.5 Gbyte @ E-240 tape,
backup/restore speed 20 Mbyte/min, typical positioning time 2 min.
Infrared LED used for VCR control, VCR type choosed from library or learned
>from VCR distance control. Reed-Solomon encoding used. DOS, W95, NT software.
LINUX/FreeBSD/OS/2 support also exists.
Probably, new DVD-RAM technology (4.5G rewritable) will kill this devices in
some future.

Alexey

--- GoldED/2 2.50+

More... (looser matching)
- Last day of these posts
- In 1998 , 1999 only
- Today
- New search...