cabbie@chinet.UUCP (Richard Andrews) (10/09/86)
Does anyone know if the Amiga video meets RS-170A specifications? Thanks, Rich Andrews ...ihnp4!chinet!cabbie
wtm@neoucom.UUCP (Bill Mayhew) (10/10/86)
Most VCRs, etc will be happy with the Amiga video output, especially if you are using interlace mode. If you are using a program that does not use an interlaced video, you can run SetLace beforehand, which will make a 640*200 screen use 400 lines out to the monitor. SetLace is a P/D program. I forgot where I got it; it's probably on on e of the Fish disks. Eventhough the Amiga video is close to RS-170, it isn't quite. If you are going to use Amiga video for a commercial purpose, you should run it though a time base correcter. There is some high high frequency noise in the 3.58 MHz subcarrier that this will take care of. The color burst signal from the Amiga is a bit sloppy, and the t.b.c. will take care of that too. A time base corrector is a pretty expensive n thousand dollar device, but most professional studios have one. For your own purposes, if you just want to fool around with a home VCR, the interlaced output should be just fine. If you have a four-head type of VCR, you can probably record even the noninterlaced output from the Amiga as well, without problems. Bill Bill Mayhew Northeastern Ohio Universities' College of Medicine Rootstown, OH 44272 USA phone: 216-325-2511 (wtm@neoucom.UUCP or ....!cbosgd!neoucom!wtm)
grr@cbmvax.cbm.UUCP (George Robbins) (10/11/86)
In article <608@chinet.UUCP> cabbie@chinet.UUCP (Richard Andrews) writes: >Does anyone know if the Amiga video meets RS-170A specifications? > > Rich Andrews ...ihnp4!chinet!cabbie In general the Amiga comes closer than most to meeting video standards than most systems, however it does not provide 'broadcast quality' signals. It is probably adequate for use with home video equipment CCTV and the like, but for bradcast use the best thing is to feed the RBG outputs into a studio encoder and process the sync signals. The same is true of the Genlock device, but it is able to synchronize the Amiga to an external sync source (genlock!). It does put out the H/2 equalizing pulses, but I don't belive it does the finer pulse width modulations. Also, there is no distinction between the reference black level, and the blanking level. A true video person could probably give a better analysis of this... -- George Robbins - now working for, uucp: {ihnp4|seismo|caip}!cbmvax!grr but no way officially representing arpa: cbmvax!grr@seismo.css.GOV Commodore, Engineering Department fone: 215-431-9255 (only by moonlite)
carolyn@cbmvax.cbm.UUCP (Carolyn Scheppner) (10/15/86)
In article <299@neoucom.UUCP> wtm@neoucom.UUCP (Bill Mayhew) writes: >... SetLace is a P/D program. I forgot where I got it; >it's probably on one of the Fish disks. I think Setlace.c is also in mod.amiga.sources. -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Carolyn Scheppner -- CBM >>Amiga Technical Support<< UUCP ...{allegra,caip,ihnp4,seismo}!cbmvax!carolyn PHONE 215-431-9180 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=