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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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DVD modulators
Hi,
Are cheap blister pack DVD to TV modulators immune to macrovision? A*s*i*m*o*v .... Well I defragged my TV and went all the way back to basic cable! |
#2
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"Asimov" wrote in message ... | Hi, | | Are cheap blister pack DVD to TV modulators immune to macrovision? They should not be affected but equally I see no reason they wouldn't pass the MacroPuke crap through to a VCR. N |
#3
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"NSM" wrote in news:khQwd.2765$nN6.2720@edtnps84:
"Asimov" wrote in message ... | Hi, | | Are cheap blister pack DVD to TV modulators immune to macrovision? They should not be affected but equally I see no reason they wouldn't pass the MacroPuke crap through to a VCR. N Sony Beta format was immune to Macrovision,IIRC. -- Jim Yanik jyanik-at-kua.net |
#4
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Sony Beta format was immune to Macrovision,IIRC.
That's a myth that I've seen proven untrue countless times. AAMOF, I've had Beta machines, including Sonys, which reacted to MacroVision with video that dimmed and brightened repeatedly. - Reinhart |
#5
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"Jim Yanik" . wrote in message .. . | Sony Beta format was immune to Macrovision,IIRC. RCA CED had no Macrovision AFAIK! N |
#6
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NSM wrote: "Jim Yanik" . wrote in message .. . | Sony Beta format was immune to Macrovision,IIRC. RCA CED had no Macrovision AFAIK! N Possibly because it had no customers. gg |
#7
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"NSM" wrote in message news:iV%wd.5690$KO5.557@clgrps13... wrote in message oups.com... | | NSM wrote: | "Jim Yanik" . wrote in message | .. . | | | Sony Beta format was immune to Macrovision,IIRC. | | RCA CED had no Macrovision AFAIK! | | N | Possibly because it had no customers. | gg Incredibly wrong. Try a search on eBay. N Certainly some people bought them, in fact there were a couple arcade games that used them (rather than the more common Laserdisc games) but from what I've read, the discs were played with a stylus that badly wore the areas used for the attract mode. Still in the grand scheme of things they were a flop, compared to VCR's and optical Laserdisc they effectively had "no" customers. In 20 years of fiddling with electronics I've never once encountered one or even anyone who's ever mentioned owning one. By contrast I've come across thousands of VCR's and hundreds of laserdisc players in homes and businesses over the years. |
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"James Sweet" wrote in message newsH4xd.265$_62.212@trnddc01... | Certainly some people bought them, in fact there were a couple arcade games | that used them (rather than the more common Laserdisc games) but from what | I've read, the discs were played with a stylus that badly wore the areas | used for the attract mode. | | Still in the grand scheme of things they were a flop, compared to VCR's and | optical Laserdisc they effectively had "no" customers. I have two players, the stereo adaptor, and over 100 movies. When movies on VHS were running around $80 each, I was able to buy then from a mail order dealer for around $7 each and got one free for every two I bought. I'd sell them on eBay but the weight makes shipping a bitch. N |
#10
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Still in the grand scheme of things they were a flop, compared to VCR's
and optical Laserdisc they effectively had "no" customers. In 20 years of fiddling with electronics I've never once encountered one or even anyone who's ever mentioned owning one. By contrast I've come across thousands of VCR's and hundreds of laserdisc players in homes and businesses over the years. There is a website with all sorts of information on CED: http://www.cedmagic.com/selectavision.html -- If there is a no_junk in my address, please REMOVE it before replying! All junk mail senders will be prosecuted to the fullest extent of the law!! http://home.att.net/~andyross My brother in law was in on the design and prep for production for the ced. He had already worked with the Japanese engineers on the RCA Selectavision VHS machines. He said the step from the very, very sophisticated electromechanical vcr to the ced system was like going from LP's back to the cylinder phonograph. I saw some ced video demo at a Radio Shack in the eighties, not too bad, but knowing what a kludgey mechanical system it was kept me away from it. Tom |
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"t.hoehler" wrote in message news:6Xixd.220160$V41.34442@attbi_s52... | My brother in law was in on the design and prep for production for the ced. | He had already worked with the Japanese engineers on the RCA Selectavision | VHS machines. He said the step from the very, very sophisticated | electromechanical vcr to the ced system was like going from LP's back to the | cylinder phonograph. I saw some ced video demo at a Radio Shack in the | eighties, not too bad, but knowing what a kludgey mechanical system it was | kept me away from it. | Tom In 1982 the video quality of the Radio Shack/Hitachi and these disks was much better than the VCRs of that time. But look at how many variations of media we have had with the same content: 35mm and 16mm film, VHS, Beta, CED, Laser Disk and now DVD. What's next, crystal cubes? N |
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In 1982 the video quality of the Radio Shack/Hitachi and these disks was much better than the VCRs of that time. But look at how many variations of media we have had with the same content: 35mm and 16mm film, VHS, Beta, CED, Laser Disk and now DVD. What's next, crystal cubes? N Supposedly DVD using a blue laser, allowing much higher data density. Once they get the recordable/re-writable thing down solid and the price of recorders and media drops to something acceptable I think VHS will all but dissapear and we'll be with a DVD technology of some sort for at least as long as VHS has stuck around. Even without recording ability, DVD has taken the market by storm, I've never seen a new technology take hold so quickly, it spread like wildfire. It works, very well, and it's cheap. I'm sure it'll be around for a while. |
#13
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"James Sweet" wrote in message news:Hylxd.2288$hc7.166@trnddc06... | | In 1982 the video quality of the Radio Shack/Hitachi and these disks was | much better than the VCRs of that time. But look at how many variations of | media we have had with the same content: 35mm and 16mm film, VHS, Beta, | CED, | Laser Disk and now DVD. What's next, crystal cubes? | | N | | | | Supposedly DVD using a blue laser, allowing much higher data density. Once | they get the recordable/re-writable thing down solid and the price of | recorders and media drops to something acceptable I think VHS will all but | dissapear and we'll be with a DVD technology of some sort for at least as | long as VHS has stuck around. Even without recording ability, DVD has taken | the market by storm, I've never seen a new technology take hold so quickly, | it spread like wildfire. It works, very well, and it's cheap. I'm sure it'll | be around for a while. I'm bound to admit that the weight and size of DVDs is superior to that of VHS. I assume the life of burned DVDs will be better than VHS also, although that still seems to be up in the air. Now all I have to do is transfer 700 VHS tapes to DVD! N |
#14
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Once
they get the recordable/re-writable thing down solid and the price of recorders and The thing about recordable optical is that it's much less re-recordable than magnetic tape. We go through about one VHS tape a year, with a programme or two recorded almost every day (the evening news, specifically). I understand you get less than a hundred cycles on a CD-rewritable, and I don't know about DVD-RWs. In fact, I've noticed the "tapes only last a year" thing and became suspicious it might be the fault of an inferior VCR (recent 'Sylvania' Funai product, replacement for an old-but-dying Magnavox) -- Marada Shra'drakaii |
#15
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On 18 Dec 2004 17:28:46 GMT, (LASERandDVDfan)
wrote: Sony Beta format was immune to Macrovision,IIRC. That's a myth that I've seen proven untrue countless times. AAMOF, I've had Beta machines, including Sonys, which reacted to MacroVision with video that dimmed and brightened repeatedly. - Reinhart Most of the Beta macines I've owned were immune to Macrovision. A few were affected by it, but the vast majority weren't. Andy Cuffe -- Use this address until 12/31/2005 -- Use this address after 12/31/2005 |
#16
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"Andy Cuffe" wrote in message
... Most of the Beta macines I've owned were immune to Macrovision. A few were affected by it, but the vast majority weren't. My understanding is that, early on, a significant number of VHS machines were relatively immune to macrovision as well. Macrovision (at least in its basic form) works by exploiting the fact that a VCR's input (recording) AGC circuitry's time constant is much faster than that of a regular TV's video inputs, so a recording (or just passing the video through a VCR) will follow the brightening/darkening caused by jimmying the average video level during the VBI, but a regular TV won't (so much... there is the unusual TV out there that shows noticeable screen changes too!). Anyway, the rumor was that after Macrovision had been designed and implemented, Macrovision (the company) began "encouraging" VCR manufacturers to ensure their AGCs were is the rate that would "work" with Macrovision (the technology). (Something I don't know is whether or not the AGC rates were part of the original VHS spec and hence whether Macrovision was really just encouraging manufacturers to actually abide by standards that were already around but perhaps often ignored or whether they really were trying to institute new specs.) In any case, I suspect it's very possible that Beta machines were more immune to Macrovision than VHS machines only because AGC timing was either different on Beta or else simply not yet as standardized as it is today. You can bet a nickel that if Beta hadn't died, Macrovision most certainly would have gotten around to creating a version of their technology that "worked" on Beta machines as well. Although piracy of videocassettes and cable TV is not something to be condoned, there did seem to be a certain sense of "adventure" between the folks building the analog video scrambling systems and those trying to undo them. I remember when Popular Electronics (or was it Radio Electronics?) had multi-part articles of building various descramblers, and one could learn an awful lot based on studying the designs. I expect this adventure is still on-going with digital encryption systems, but a lot of it has been driven underground with the advent of so much legislation making a lot of reverse engineering downright illegal. One really wonders just who the FCC and our politicians are serving when you see media providers push through the use of such silliness as the HDTV "broadcast flag" these days (see: http://www.eff.org/broadcastflag/). ---Joel Kolstad |
#17
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"Joel Kolstad" wrote in
: One really wonders just who the FCC and our politicians are serving when you see media providers push through the use of such silliness as the HDTV "broadcast flag" these days (see: http://www.eff.org/broadcastflag/). ---Joel Kolstad That is to prevent people from recording HD movies or TV shows off cable or air onto DVDs of their own,instead of buying commercially-produced DVDs. (Protecting the DVD industry/anti-"piracy";that's who they're serving.) -- Jim Yanik jyanik at kua.net |
#18
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"Jim Yanik" . wrote in message
.. . That is to prevent people from recording HD movies or TV shows off cable or air onto DVDs of their own,instead of buying commercially-produced DVDs. Yes, and it's a pretty poor reason. The same argument was heard (in the form of people taping shows off cable or the air instad of going to movie theatres) some 25 years ago when VCRs first came out. If a film owner doesn't want people taping the show, fine -- don't sell it to the broadcasters! As it is now, movies end up on DVD in stores _long_ before they show up on broadcast TV and significantly before they show up on the cable movie channels. Trying to prevent viewers from taping the movie for their own re-use to squeeze out just a couple of extra DVD sales (even when the home viewer's tape will lack all the DVD extras anyway!) is just being greedy, IMO. The vast majority of people use video recorders for time shifting, not for building their own video libraries. I suppose the movie studios would outlaw Blockbuster, Hollywood Video, etc. if they could too... ---Joel |
#19
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On Tue, 19 Jul 2005 15:23:06 -0700, "Joel Kolstad"
wrote: "Andy Cuffe" wrote in message .. . Most of the Beta macines I've owned were immune to Macrovision. A few were affected by it, but the vast majority weren't. My understanding is that, early on, a significant number of VHS machines were relatively immune to macrovision as well. The only VCRs I've seen that were immune to Macrovision are most Betas (virtually all Sony Betas) and a few Panasonics from about 1987-1992. Some early VHS machines may have been immune, but I can't remember ever seeing any. The way I understand it, Macrovision took advantage of the design of the AGC circuit used in most VHS VCRs, but that Most Beta VCRs were different. I don't doubt they encouraged manufacturers to make their VCRs respond to macrovision later on. I believe some of the more recent VCRs and camcorders actually detect it, refuse to record and put up a message on the screen telling you what's happening. Andy Cuffe -- Use this address until 12/31/2005 -- Use this address after 12/31/2005 |
#20
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On Tue, 19 Jul 2005 18:23:52 -0700, "Joel Kolstad"
wrote: Yes, and it's a pretty poor reason. The same argument was heard (in the form of people taping shows off cable or the air instad of going to movie theatres) some 25 years ago when VCRs first came out. And now they make MORE money from selling videos than from the theaters. And to think they tried to make VCRs illegal. If a film owner doesn't want people taping the show, fine -- don't sell it to the broadcasters! I couldn't agree more! If their content is that valuable, don't broadcast it. Keep it in a vault where no one can see it. It's far easier and faster to copy a DVD using a PC, but they seem more worried about stopping people from going from DVD to tape, or using a DVD recorder. I can't believe how much effort is put into preventing video devices from working together. HDCP on DVI makes no sense to me. If I wanted to save a copy of a HDTV program I would find a way to save the original MPEG data (like with a PC HDTV card). No device even exists that can record DVI. All it does is prevent people from connecting their "old" HDTV to their new DVD player with HDCP DVI out. Andy Cuffe -- Use this address until 12/31/2005 -- Use this address after 12/31/2005 |
#21
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"Joel Kolstad" wrote in
: "Jim Yanik" . wrote in message .. . That is to prevent people from recording HD movies or TV shows off cable or air onto DVDs of their own,instead of buying commercially-produced DVDs. Yes, and it's a pretty poor reason. The same argument was heard (in the form of people taping shows off cable or the air instad of going to movie theatres) some 25 years ago when VCRs first came out. If a film owner doesn't want people taping the show, fine -- don't sell it to the broadcasters! As it is now, movies end up on DVD in stores _long_ before they show up on broadcast TV and significantly before they show up on the cable movie channels. Trying to prevent viewers from taping the movie for their own re-use to squeeze out just a couple of extra DVD sales (even when the home viewer's tape will lack all the DVD extras anyway!) is just being greedy, IMO. I agree. IMO,the people who record movies off cable or air are not those who would buy DVDs in the first place.It's not like a song or album that one would listen to over and over again.I suspect that the so-called "music piracy" was not that big an impact as the RIAA would like us to believe.Their lousy marketing schemes are much more responsible for any drop in sales or revenue,IMO. Besides,they still get a cut from sales of blank media,just like they do for blank video and audio tape. The vast majority of people use video recorders for time shifting, not for building their own video libraries. TIVO and others do that now,but do not allow recording to permanent media,IIRC. I suppose the movie studios would outlaw Blockbuster, Hollywood Video, etc. if they could too... ---Joel I don't know why people would want to record movies off the air or cable,they're all edited these days. -- Jim Yanik jyanik at kua.net |
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