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Someone should add that the U-matic tape was the original mastering tape for Audio CD and is only recently being phased out in favor of other digital tape formats and error-checked CD-R burned on high quality CD recorders.
Details here. http://www.edinformatics.com/inventions_inventors/compact_disc.htm — Preceding unsigned comment added by 67.136.146.4 ( talk) 25 October 2005 1:11:25 (UTC)
In accordance with Wikipedia recommendations, this article should preferably retain Commonwealth English ('British') spellings, as those were used in the original version. (This comment posted in response to changing of spelling to U.S. English by one editor). Fourohfour 10:55, 5 January 2006 (UTC)
The long footnote on porno was written by Donreed for the article on videocassette recorders. It was too long and too tangenital for that article, so I transferred it here. Even here, it is dubious. For one thing, it never establishes that there was any commercial market in pornographic U-matic tapes in the 1970s, on which his whole hypothesis depends. — Walloon 08:43, 2 December 2006 (UTC)
There is no mention of the two cassette sizes. A picture of such would be good too. But I'm less than clear as to which of the three Umatic variants was available for each of the two sizes. Can some put this into the article? Colin99 19:56, 21 January 2007 (UTC)
The article says "Sony introduced the semi backwards-compatible High-band" -- with these players being used often in archival settings currently the article would serve a broader audience to explain the "semi backwards" comment. Could someone add a paragraph or sentence stating if the player/recorders in the U-matic line can play all U-matic tapes or not? See http://umatic.palsite.com/models.html for list of players with the three types of U-matic: (LB), HB & SP (and the optional NR designation.)
The question is unanswered in the article: Do U-matic [all] players play [all] U-matic tapes?
This would be helpful in discovering what a U-matic deck does.
-- Dcsutherland 09:18, 26 March 2007 (UTC)
Could someone add to the Compact Disc article something about U-Matic VCRs with a PCM adaptor being used for audio CD mastering? What'd be especially nice is the exact specifications of how many bits of data per video line were used, and how that adds up to the 44.1Khz sampling rate. That's why audio CDs use 44.1Khz rather than something nicely divisible by 2 like 48Khz. Try telling that to many audiophiles and they'll go on about Nyquist frequency and lots of other retconned technobabble about why 48Khz wasn't used, when the truth is just the mundane fact of how much audio data Sony/Phillips was able to pack into each video frame on the tape. ;)
Article says: > and generated "pseudo video" from the bits, storing 48 bits—three 16-bit samples—as bright and dark regions along each scan line.
Because CD is stereo, shouldn't that be 96 bits bits per line (3 samples x 16-bit per sample x 2 channels)? — Preceding unsigned comment added by 83.47.136.10 ( talk) 17:50, 3 April 2018 (UTC)
Television shows that were recorded in the 1970s and early 1980s on U-matic tape often had "light trails" -- smears of light that appeared when a light source was on camera. Much like a long-exposure photograph of a moving light source, except presumably the videotape wasn't a long exposure, as the tape itself was moving. Is there an explanation for this effect? —Preceding unsigned comment added by 74.8.237.123 ( talk) 17:32, 21 February 2008 (UTC)
I would like to know the answer to the light trails question also. I always noticed the light trails on concert videos from the 70's and early 80's. I noticed the trails always came from the bright stage lights.-- 72.154.223.249 ( talk) 17:52, 8 July 2008 (UTC)
In the 80s-90s I worked in a documentary a/v production house in the US and we used BVU 3/4" most often to submaster from the ampex 1" Type C videotape system to the VHS tape deck since it was less fragile, being in a cassette and all. IIRC, the workflow was as follows:
Raw footage from Panasonic MII (and later Betamax) mixed with narration to MII or Beta and edited onto 1" then submaster to 3/4" then dupe to VHS for direct sales distribution. Cowbert ( talk) 00:24, 10 April 2008 (UTC)
My "lines per picture height" edit was reverted. Here's an explanation. In the past the horizontal resolution was measured in the number of discernible black and white vertical lines (counting both white and black lines, not line pairs as in photography for example). However, instead of counting all the lines across the whole image, only lines inside the largest 1:1 square were counted to make the measurement aspect-ratio independent. That's what "per picture height" refers to. It's easy to convert between lines and lines per picture height: just multiply by the aspect ratio of the display. 330 lines per picture height equals 4:3 x 330 = 440 lines across the whole 4:3 screen. For a 16:9 screen there would be 587 lines. There's a good explanation at http://www.afterdawn.com/glossary/terms/lines_per_picture_height.cfm for example. For example DVD has "540 lines of horizontal resolution" even though it has 720 pixels across. 540 simply refers to the number of lines per picture height - 720 / 4:3 = 540.
Totsugeki ( talk) 17:36, 13 August 2008 (UTC)
I know that U Matic was used in the 70s by TV companies, but were these machines commercially available? I've never heard of anyone who has video tapes from the early 1970s. The earliest I've heard of domestically is 1977 - 78.-- Tuzapicabit ( talk) 22:21, 25 August 2008 (UTC)
I have a whole bunch of 1980s-era U-matic cassettes in front of me, and none contains an integral mechanism to lock the reels. Where did this part of the article come from? 108.200.48.254 ( talk) 20:19, 20 May 2012 (UTC)
I added the Unreferenced section templates to two sections which lacked references. I also tagged the top of the article with the Original research and RefImprove tags, until the information in the tagged sections are verifiable with reliable sources. — Josh3580 talk/ hist 17:40, 9 September 2014 (UTC)
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In the first reference, there is this text:
"After exhaustive research, the development team was confident it had devised a mechanism that could be used for cassette tape VCRs, the U-loading system. The name was derived from the U-shaped figure the tape followed when seen from above." Sony History, [Sony: Freedom of Thought and Creation—the Kihara Method].
I have done a very minimal search for the corresponding text on DuckDuck Go and didn't really come up with a match. I am just wondering about the formatting of the citation and maybe it should be a blockquote and a citation or just formatted differently. Requesting a discussion about what to do. Jimj wpg ( talk) 23:11, 9 September 2019 (UTC)