phil@amdcad.AMD.COM (Phil Ngai) (08/09/88)
In article <4721@fluke.COM> strong@tc.fluke.COM (Norm Strong) writes: >} How about making a copy of a VHS tape, can you see that? > >The last argument is, of course, an argument for owning 2 VCR's, at least one >of which is S-VHS. The results will be pretty close to having two non-VHS >recorders: At best, the copy will be identical to the original--which is >ordinary VHS. This is a common belief, that if one of your components is limited to 240 lines of resolution, it doesn't pay to make your others any better than that. It's been a long time but I believe that if you have a series of cascaded systems, such as a VCR taping off a VCR, that you will lose resolution even if they are both the same. The relationship is something like system = 1/sqrt( (1/vcr1)^2 + (1/vcr2)^2) I believe this works out to 170 lines if you cascade two VCRs with 240 lines of resolution each. (did I remember my linear systems theory correctly?) -- I speak for myself, not the company. Phil Ngai, {ucbvax,decwrl,allegra}!amdcad!phil or phil@amd.com