[net.video] Standards Conversion

lauren@vortex.UUCP (Lauren Weinstein) (01/04/84)

There are transfer houses around who will be happy to transfer
between the North American NTSC and the other standards
(PAL, PAL-M, SECAM ...)

However, these services are NOT CHEAP.  Most of the transfer houses are
here in Los Angeles or in New York City.  "Image Transform" is a well known
one out here, though I occasionally get calls from places who
can undercut I.T.'s price by quite a margin.  Still expensive, though.

These services will actually transfer between tape formats, an operation
which requires high speed A/D and D/A operations, with lotsa fun
bit twiddling in between.  To simply VIEW an image from a "foreign"
tape, you normally need BOTH a multi-standard VTR and a multi-standard
monitor.  The big manufacturers (including SONY, my personal choice
for virtually all video gear) do sell such equipment in their professional
product lines.  Once again -- big bucks.

When viewing non-NTSC images DIRECTLY on an NTSC set (e.g. off of
a satellite feed) it is sometimes possible (via horizontal and vertical
hold manipulations) to lock onto PAL or SECAM images.  This is due
to the fact that the scan rates are close enough to NTSC standards
that some sets can be "misadjusted" to track.  The resulting image
has a damaged aspect ratio, however, since you are attempting to
view under rather "rigorous" conditions, to say the least.  You will
NOT be able to receive color under any conditions -- the systems are
totally different.  Such techniques do not work with videotapes,
where exact synchronization of the spinning heads to the signal
is required for proper operation.

--Lauren--