Talk:Capacitance Electronic Disc

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edit·history·watch·refresh Stock post message.svg To-do list for Capacitance Electronic Disc:

Here are some tasks awaiting attention:
  • Copyedit : Any section - all could use a little review
  • Expand : Hardware and Software sections - Beginnings and Research also seems a bit lackluster
  • Verify : Any unsourced statements, especially the "How CEDs Work" section
  • Other : In general, try to make it at least to GA quality

Other uses of the name[edit]

Confusingly, "Selectavision" was first used by RCA as the name for a holographic tape system used for video recording, developed some time in the late 1960s. They later re-used the name for their CED system. —The preceding unsigned comment was added by Dex Otaku (talkcontribs) 13:57, January 15, 2005 (UTC)

The holographic tape system seemed promising as a potential replacement or competitor for telecine film, but was dropped before it really got anywhere. —The preceding unsigned comment was added by Dex Otaku (talkcontribs) 13:58, January 15, 2005 (UTC)

Removed awkwardness section[edit]

I removed the awkwardness diatribe from the disadvantages because it was beyond repair. First, they weigh not quite 1.5 lbs each, not 3 lbs. It is dubious whether this was a strong mark against the CED. Next, the CED sleeve is rectangular and only about 12 1/4 inches across. This short side has the spine label and is presumably the ideal side to stick out when being stored. It seems odd that their would be a height problem with storage. The only difference is that they would stick out about an 1 1/4 inches further than a record. Anyway, the statement about thickness "therefore making them too tall", makes absolutely no logical sense. As for thickness, they are effectively not much thicker than a laserdisc in a sleeve. —The preceding unsigned comment was added by (talkcontribs) 04:28, January 30, 2005 (UTC)

CED And selectavision[edit]

Just to ask, is the CED Videodisc the same as selectavision? —The preceding unsigned comment was added by Oliverdl (talkcontribs) 03:44, September 29, 2005 (UTC)

Images needed[edit]

I would like to see what an actual CED disc looks like without the caddy. —The preceding unsigned comment was added by Navstar (talkcontribs) 01:09, April 17, 2006 (UTC)

If you go to the CED Magic website, maybe the guy who runs the site there can donate an image or two. -- Jimj wpg 16:24, 27 July 2006 (UTC)
I added a Image:Ced_disk.jpg and Image:Ced_cart2.jpg, I have a few more, so if you want me to upload them, just ask and I will. Athnex 20:32, 25 November 2006 (UTC)

SelectaVision Disc[edit]

This is a great article. I found a SelectaVision disk at a garage sale and was amazed to notice it felt like a record. It is a beautiful piece with a shiny blue background. If I can find it, I will be sure to post a picture. Iansanderson 07:21, 27 July 2006 (UTC)

List of movies published under the format?[edit]

According to the article, the format only lasted around five years, so I doubt too many movies were ever released in it. However, I do know that my grandmother owns a few discs, including Disney's "Alice in Wonderland" and "Mary Poppins". Is it possible to create an article (or perhaps adding to this one) a list of all Selectavision discs that were released? Xyzyxx 17:52, 14 December 2006 (UTC)

According to CED Magic, there are 1,700 known US (NTSC) titles and 272 UK (PAL) titles. - Keith D. Tyler (AMA) 18:35, 14 December 2006 (UTC)


Edits/additions(I speak as a collector of these discs) 1-the groove IS smooth, the peak and valleys are recorded/held inside the disc itself. 2-The inside metal of the disc is grounded by a spring when loaded, and forms 1 plate of a capacitor; the other plate is the needle itself. An RF frequency OSC is modulated by the capacitance variations Decoding this is VERY similar to a TV IF strip, or what an RF modulator does in reverse, with the disc being the carrier signal. 2-The grooves on a CED IS ONE spiral(like a CD);even with no tracking signals it will play OK until it hits a surface defect; it will then skip. For picture searching, little coils in the playback assembly 'kick' the needle forward and backwards;this happens automatically if a skip defect is encountered. 3-A CED has 6 fields (3 frames) per revolution;so pause on most players just lifted the needle off the disc for a blank screen. Some late players had pause with a jittery 3-frame motion 'stutter'. —Preceding unsigned comment added by (talkcontribs)

Two things.
1. Some of your information about CEDs ("the peak and valleys are recorded/held inside the disc itself" is DIRECTLY contradicted by Memories of Videodisc.
2. This information cannot be directly used, as everything in a Wikipedia article must be cited to a reliable source. --Bill (who is cool!) 22:13, 28 March 2007 (UTC)

Fair use rationale for Image:The hobbit ced.jpg[edit]

Nuvola apps important.svg

Image:The hobbit ced.jpg is being used on this article. I notice the image page specifies that the image is being used under fair use but there is no explanation or rationale as to why its use in this Wikipedia article constitutes fair use. In addition to the boilerplate fair use template, you must also write out on the image description page a specific explanation or rationale for why using this image in each article is consistent with fair use.

Please go to the image description page and edit it to include a fair use rationale. Using one of the templates at Wikipedia:Fair use rationale guideline is an easy way to insure that your image is in compliance with Wikipedia policy, but remember that you must complete the template. Do not simply insert a blank template on an image page.

If there is other other fair use media, consider checking that you have specified the fair use rationale on the other images used on this page. Note that any fair use images uploaded after 4 May, 2006, and lacking such an explanation will be deleted one week after they have been uploaded, as described on criteria for speedy deletion. If you have any questions please ask them at the Media copyright questions page. Thank you.BetacommandBot 06:25, 6 June 2007 (UTC)

Similarities and differences to "Telefunken Bildplatte" ?[edit]

In Germany, a system similar from users's point of view, called "Bildplatte" failed 10 years before the "Selectavision" failed. Did nobody at RCA tried to learn from it ? It would be nice to work out the similarities ( and differences ) both concering technology AND marketing ( trying to sell prerecorded media ). hemmerling (talk) 20:55, 24 December 2007 (UTC)



J'aimerais savoir comment on fait pour convertir des fichier de format COD en fichier de format AVI.

Merci, — Preceding unsigned comment added by (talk) 14:15, 27 August 2011 (UTC)

More Facts[edit]

Not sure if the following facts can even be worked-in to a Wiki article, since the industry will never admit to it in writing and, thus, no citation is available, but the public release of this terminally-flawed, so-called "video format" - a format which was foolish from its very inception, which was clearly and unequivocally NEVER going to "make it", and which they KNEW was doomed before they even started the Marketing campaign - was a DELIBERATE AND CALLOUS ATTEMPT by the Entertainment Industry to sour the public's perception of "disc-based video" for as long as possible. This was done because they hadn't yet "milked" the whole fake "VHS vs. Beta" flap (which they ALSO deliberately FABRICATED, in order to create the extremely-profitable "consumer confusion" that is prized so highly in corporate boardrooms) for every cent they could steal from the gullible buying public.

In this they were depressingly successful, as the Laserdisc format languished for almost TWELVE more years before genuinely-viable "home" versions were finally "released" for general purchase - at least, at prices actual HUMANS could afford. Said Laserdics, the only PROPER disc-based video format yet released, were almost immediately "superseded" by the horrid, hopelessly-over-compressed DVD and BluRay trash we suffer with now. (And the INSTANT they judge that we've bought enough of THAT crap, they'll "release" whatever "next new thing" they developed two decades ago, obsolescing THOSE formats...!)

The Doctor Is On (talk) 09:02, 25 March 2013 (UTC)