mikeg@pro-charlotte.cts.com (Mike Gladden) (09/10/88)
I have a couple of questions for you experts concerning both audio and video digitizing on the Amiga. 1) I have a Perfect Sound audio digitizer for the Amiga 500. It seems to digitize sounds ok, but it makes my stereo hum like crazy. The hum is not just a minor annoyance, its plenty loud enough to make me wonder whether or not it's safe to hook it up to my stereo. This hum doesn't get carried through to the computer and doesn't show up in the digitized sounds. It also stops the instant my audio cables are removed from the digitizer. I have tried different cables with the same results and I have the cables connected to the preamp level tape outputs on my equalizer. Does anyone have any clues as to what may be wrong here? 2) I also have a Digi-View and the necessary adapter for the Amiga 500. I don't have any problems with this setup, except that the used B/W camera I have is just a piece of crap. I've read that the average color video camera doesn't have enough resolution to do the job as well as most B/W cameras. But the specifications on my new GE CG-9808 video camera seem to indicate that it does have good enough resolution. The scoop on the camera section indicates: Scanning - 525 Lines / 60 Fields / 30 Frames. Isn't this _EXACTLY_ what I need? Looks like it to me. Thanks in advance to whomever can give me an answer to either of these questions. MikeG UUCP: ....!crash!pro-charlotte!mikeg
keithd@cadovax.UUCP (Keith Doyle) (09/14/88)
In article <3413@crash.cts.com> mikeg@pro-charlotte.cts.com (Mike Gladden) writes: >2) I also have a Digi-View and the necessary adapter for the Amiga 500. I > don't have any problems with this setup, except that the used B/W camera > I have is just a piece of crap. I've read that the average color video > camera doesn't have enough resolution to do the job as well as most B/W > cameras. But the specifications on my new GE CG-9808 video camera seem > to indicate that it does have good enough resolution. The scoop on the > camera section indicates: Scanning - 525 Lines / 60 Fields / 30 Frames. The problem with using a color camera for digtizing (or a VCR output for that matter) is that standard NTSC color is achieved by adding a 3.58Mhz phase modulated sine wave on top of the standard B&W (luminance) signal. 3.58Mhz can actually represent luminance information that is big enough to see. Most standard B&W tv's have a 3.58Mhz notch filter designed to filter this signal out, so you don't see it on the screen. If you've evern looked at an old old tv that didn't have a notch filter, or one that has had it disabled, you'll find you can actually see the graniness produced by a visible 3.58Mhz signal. On a color TV, this signal is filtered out and used seperately for color information. When you run a color signal into a video digitizer, one of two things are going to happen: 1. You are going to see undesirable herringbone effects due to digitizing the 3.58Mhz color carrier as if it was part of the image. or 2. You are going to lose some of the high frequency components of the image if the 3.58Mhz signal is filtered out. Because of this, you will generally always be able to get a better digitized image using a B&W camera with filters than if you use a color camera or color signal from a VCR. The other difficulty may be that using color filters on a color camera could give you incorrect color balancing, though I don't know for sure. For a B&W image it's probably passable. Keith Doyle # {ucbvax,decvax}!trwrb!cadovax!keithd Contel Business Systems 213-323-8170
stan@mruxb.UUCP (stanczak) (09/14/88)
While I have noticed many business software tools available I have not been able to find any project management tools including pert chart capabilities. If anyone knows about any I would appreciate hearing from you! Ed Stanczak arpa: stan%mruxb@bellcore.com Bellcore uucp: rutgers!bellcore!mruxb!stan
billh@tekig4.TEK.COM (William Hansen) (09/15/88)
In article <2249@cadovax.UUCP> keithd@cadovax.UUCP (Keith Doyle) writes: >When you run a color signal into a video digitizer, one of two things are >going to happen: > >1. You are going to see undesirable herringbone effects due to digitizing >the 3.58Mhz color carrier as if it was part of the image. Ah, that explains why the video from my vacation came out looking so bad when I tried to digitize it. Is there any place that sells a notch filter that you could simply plug in line between the VCR and the digitizer? Bill Hansen billh@teklim.LIM.TEK.COM
bjc@pollux.UUCP (Betty J. Clay) (09/16/88)
In article <689@mruxb.UUCP> stan@mruxb.UUCP (stanczak) writes: >While I have noticed many business software tools available >I have not been able to find any project management tools >including pert chart capabilities. > >If anyone knows about any I would appreciate hearing from you! > >Ed Stanczak arpa: stan%mruxb@bellcore.com >Bellcore uucp: rutgers!bellcore!mruxb!stan Would Gantt charts do? A program called AmiGantt appeared on our local BBS back in May, and I used it on a disk-of-the-month for my club in June. I have never had occasion to use these charts, but this program seemed to offer considerable capability and quite a number of features. Betty Clay .........killer!pollux!bjc
daves@hpcilzb.HP.COM (Dave Scroggins) (09/22/88)
> >>When you run a color signal into a video digitizer, one of two things are >>going to happen: >> >>1. You are going to see undesirable herringbone effects due to digitizing >>the 3.58Mhz color carrier as if it was part of the image. >Ah, that explains why the video from my vacation came out looking so bad >when I tried to digitize it. Is there any place that sells a notch filter >that you could simply plug in line between the VCR and the digitizer? Don't some of the newer products support color cameras???? I'd sure like to get a digitizer for Christmas that I can plug my color CAMCORDER into and take decent pictures. (IE: NTSC input on the digitizer box.) Dave S.