| From 394.0 Author - Here is an example of why tape format is important
Newsgroups: comp.sys.amiga
Path: decwrl!pyramid!amdahl!twg-ap!styx!ames!rutgers!seismo!dalcs!dalcsug!philip
Subject: Professional video
Posted: 19 Mar 87 21:15:35 GMT
Organization: Dalhousie University, Halifax, N.S., Canada
I am currently working for a company who wants to put together a professional
looking presentation using video on the Amiga. We are currently using
Aegis animator and images as well as Digi-View. I am wondering what are
the best tools out there for doing this? Has anyone used/seen Caligari?
What advise can you give me? Do I need genloc? What type of tape machine
is best (beta/vhs/ .75 inch/ etc) to use.
Please mail me your replies and I will post a summary to the net of the
replies I get.
Thanks,
Peter Philip
Look ma, no disclaimer!!
|
| If EDTV is the mult-comb filter approach of increasing resolution,
then I doubt that the Amiga would make full use of it. You need
the video source to implement multi-comb filters, and I don't know
of any products that currently do this. If EDTV is using harmonic
modulation the same would apply.
Can someone please explain EDTV for those of us who haven't heard
that particular term before?
-Dave
|
| <<< DSSDEV::PUBLIC$:[NOTES$LIBRARY]VIDEO.NOTE;1 >>>
-< Videophile Forum >-
================================================================================
Note 1049.0 Super VHS (S-VHS) defined 4 replies
LDP::WEAVER "Laboratory Data Products" 31 lines 24-MAR-1987 18:19
--------------------------------------------------------------------------------
...
S-VHS will use a new high-bias, oxide-based videotape formultion,
allowing these next-generation VCR's to achieve greater than 400-line
video recording resolution. That exceeds the recording capability
of the best VHS and Super-Beta consumer VCRs and represents a broader
recording spectrum than most TV stations now transmit.
Larger Bandwidth Needed
Achieving 400-line resolution requieres a new 7-MHz bideo bandwdth,
more than 1-MHz greater than traditional broadcast NTSC bideo.
So, JVC engineers have devised a means of separating the chrominance
and luminance video information of NTSC to allow greater signal
bandwidth for each. During playback, the color and picture detail
video information is again combined into an NTSC-compatible video
signal for playback on standard TV receivers.
Horizontal resolution exceeds 400 lines. Sound is recorded in
an FM format, taking advantage of the new 7-MHz tape bandwidth of
S-VHS over the standard VHS format space.
While price an availability have note yet been set, the first
machines are expected to debut at the Summer Consumer Electronics
Show in Chicago in 10 weeks. They are expected to be capable of
record and playback in the standard VHS SP (two hour) and EP (six
hour) recording modes.
...
Reprinted from Electronic Engineering Times - Monday, March 23,
1987, page 37.
-Dave
================================================================================
Note 1049.1 Super VHS (S-VHS) defined 1 of 4
QUARK::LIONEL "Free advice is worth every cent" 11 lines 24-MAR-1987 19:35
-< No mention of record time in S-VHS? >-
--------------------------------------------------------------------------------
Sounds pretty good. I wonder what the record time will be on
T-120 tapes? I think this notion of separating the luminance and
chrominance info is already used in some professional equipment,
such as Betacam, but the tape speeds there are faster than anything
currently used by Beta or VHS. Would a one-hour record time in
S-VHS mode on a T-120 be acceptable? I dunno... If they do have
to make the tape move faster, that makes it less likely that there
would be prerecorded tapes in S-VHS, as movies would have to be
put onto two or more tapes (two hours at SP is a limitation already
in VHS).
Steve
================================================================================
Note 1049.2 Super VHS (S-VHS) defined 2 of 4
RICKS::PEKKALA "Let go my Eggo" 9 lines 25-MAR-1987 07:48
--------------------------------------------------------------------------------
Hurray!!! Hurray!!! There is hope for VHS!!!
Now, will it be compatible with older tapes? If Steve is right, and the speed
has changed, I think not... So, ...
Boooo!!! Boooo!!! Another incompatible format has been created!!! Will
somebody please shoot those marketeers!!!
rep
================================================================================
Note 1049.3 Super VHS (S-VHS) defined 3 of 4
QUARK::LIONEL "Free advice is worth every cent" 10 lines 25-MAR-1987 09:48
--------------------------------------------------------------------------------
Re: .2
All of the reports so far say that S-VHS tapes will NOT play
back on regular VHS decks. Yes, this is an entirely new format.
The clever part is that you'll really be buying two VCRs in one
- one that plays and records S-VHS and another that plays and records
VHS (the latter is what is claimed, but we'll have to wait for the
actual units to see).
Steve
================================================================================
Note 1049.4 Super VHS (S-VHS) defined 4 of 4
VIDEO::HOFFMAN 13 lines 25-MAR-1987 14:54
-< S-VHS time same as VHS >-
--------------------------------------------------------------------------------
RE: -< No mention of record time in S-VHS? >-
The news item in Electronic Engineering Times states 2 hours time
for SP and 6 hours time for EP, implying same speed as standard VHS.
Keeping in mind that the triumph of VHS over Beta is probably wholly
attributable to VHS's longer recording time, it is doubtful JVC,
Mitsubishi, Sharp, Hitachi and Matsushita would fall into the short
play time trap at this stage of the game...
-- Ron
|