Talk:Capacitance Electronic Disc

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	To-do list for Capacitance Electronic Disc:	edit  · history  · watch  · refresh
Here are some tasks you can do: Copyedit: Any section - all could use a little review Verify: Any unsourced statements, especially the "How CEDs Work" section Expand: Hardware and Software sections - Beginnings and Research also seems a bit lackluster Other: In general, try to make it at least to GA quality

Contents 1 Other uses of the name 2 Removed awkwardness section 3 CED And selectavision 4 Images needed 5 SelectaVision Disc 6 List of movies published under the format? 7 Facts

[edit] Other uses of the name

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 (talk • contribs) 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 (talk • contribs) 13:58, January 15, 2005 (UTC)

[edit] Removed awkwardness section

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 24.92.249.231 (talk • contribs) 04:28, January 30, 2005 (UTC)

[edit] CED And selectavision

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

[edit] Images needed

I would like to see what an actual CED disc looks like without the caddy. —The preceding unsigned comment was added by Navstar (talk • contribs) 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)

[edit] SelectaVision Disc

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)

[edit] List of movies published under the format?

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)

[edit] Facts

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'. —The preceding unsigned comment was added by 216.58.209.175 (talk • contribs).

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)