Talk:Composite video

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Illustration[edit]

Would it be possible if someone made an illustration or graph of how it is done getting 3 signals (YUV) in one "plug" with only 2 connectors? I'm very curious about that, atleast, but dont nearly have enough background knowledge to do it. anon 10:56, Jun 17, 2010 (UTC)

Initialisms[edit]

In the 60's/70's some wag came up with some alternate words for the abbreviations:

  • NTSC "Never Twice the Same Colour"
  • SECAM "System Essentially Contrary to the American Method"
  • PAL "someone please fill this in and check" "Perfection All Lines"? <-- "Picture at Last"

If I remember right it was heavily biased to PAL Archivist 00:55, Nov 15, 2003 (UTC)

I knew SECAM as "Shows Every Colour All Murky"
20.133.0.13 (talk) 14:05, 24 March 2009 (UTC)
I always learnt "Système Elégant Contre les AMéricains" though I also came across "Sans Experience contre les Americains" The Seventh Taylor (talk) 13:03, 29 September 2011 (UTC)

CVBS initalism[edit]

Regarding CVBS, the article states: "CVBS initialism, meaning "Composite Video, Blanking, and Sync". I've also come across Composite Video Broadcast Signal and ~ Baseband Signal. Even Composite Video, Burst, and Sync. Which is it? Is there an authoritive reference for this? The Seventh Taylor (talk) 13:06, 29 September 2011 (UTC)

According to the Dictionary of Electronics, Fourth Edition, Newnes, 1999, edited by S.W. Amos, R. S. Amos and G.W.A. Dummer, appendix , page 365, CVBS stands for "compositve video blanking and synch". Good enough for me. --Wtshymanski (talk) 14:45, 29 September 2011 (UTC)
Actually, CVBS has various definitions, Color Video Blanking Signal should be making the most sense - 'Composite' is all this combined and 'Blanking' and 'Sync' is somewhat the same thing. In German it's FBAS - Farb-Bild-Austast-Signal. I can also find
  • Composite Video Baseband Signal
  • Composite Video Burst Signal
  • Composite Video, Burst and Sync
  • Color, Video, Blanking, Synchronization
  • Colour Video Blanking Sync
  • Composite Video Broadcast Signal
in common use. All of these make sense and are from relevant sources. I'd guess we won't be able to trace this back in time to its definition. Any notion for adding at least the more popular definitions to the article? Zac67 (talk) 20:29, 21 October 2011 (UTC)
Cite it and write it. --Wtshymanski (talk) 21:52, 22 October 2011 (UTC)

RCA/BNC[edit]

Since the Yellow RCA connector is by far the most common connector, the term "yellow-plug video" has been suggested to help cut down on confusion between "composite" and "component" (which sound somewhat similar).

Samurai: what the hell does "commercial variations of video media" mean?

Why _IS_ composite referred to as RCA/BNC?

- 67.118.29.33 10:38, 31 Mar 2005 (UTC)

          Composite is referred to as RCA/BNC because those are the types of connecters used on the ends of the cable.
          An RCA plug is the common "yellow plug" video that is mentioned above.  BNC is an older style connecter that 
          attaches to coaxial cable.  BNC connectors can be found on old networking cards and all oscilliscopes.
                       mboylevt

BNC connectors are the professional choice and most professional video equipment will use BNCs for video input and output (composite, component, RGBHV, and in some cases even S-video); the RCA ("phono") connector is a poor connector in general, and regarded as particularly poor for video based on its electrical/shielding characteistics. BNC connectors are locking, mantain proper impedance and offer better shielding performance. Lincoln 69.17.11.103 17:35, 18 February 2007 (UTC)

The RCA plug has one major advantage over the BNC for consumer use which is why it is used - it's cheaper. 86.182.71.209 (talk) 17:05, 5 March 2011 (UTC)

Modulation channel[edit]

Every piece of consumer equipment I've used in the USA in the past 25 years modulated the signal onto channel 2 or 3 (not 3 or 4), what am i missing?

I have never, ever owned a piece of equipment that modulated the signal into channel 2. Always 3 or 4. Liquidtenmillion 00:51, 15 April 2006 (UTC)

Frequency[edit]

What is the normal frequency composite uses?

What is the typical and maximum equivalent resolution of video information carried by the CVBS format? 480 lines? Glueball (talk) 11:26, 13 May 2008 (UTC)

Unlike television channels, which are modulated onto an RF carrier, composite video is baseband. The signal ranges from 0Hz to about 4.5MHz. Television channels are about 6MHz wide, described variously as the lower end, the center, or the carrier frequency. US TV channel 2 is from 54 to 60MHz, for example, with the carrier at 55.25MHz.

Gah4 (talk) 09:18, 2 June 2008 (UTC)