Color Bars?
- Thread starter arhartman
- Start date
imgentertainment@mac
The Reverend
Color bars are used to calabrate color of monitors from video sorces. Color bars always look the same. You use color bars for everything in a professional production invorment. That way you know if what you are seeing on the monitor is actually what you are getting.
http://www.execulink.com/~impact/bmonitor.htm
http://www.execulink.com/~impact/bmonitor.htm
adkimery
Veteran
Yes. A typical tape for b'cast might look something like this:arhartman said:
00:58:20:00 - Black
00:58:30:00 - Bars & Tone
00:59:30:00 - Black
00:59:40:00 - Slate
00:59:50:00 - Black
01:00:00:00 - Start of show
Bars & Tone are used to calibrate other equipment besides monitors. For example, if you are going to make analog copies of a tape you use the bars & tone to set the audio and video levels on the record deck so that you get an accurate copy of the tape. Although as more and more things go digital I think B&T will be used less in this respect because it's just 1's & O's now.
-A
glenn chan
Well-known member
Color bars let you calibrate the interfaces between equipment, so that they interpret the signal correctly. Or, you use them to set proper levels between various pieces of equipment.
It is only one part towards getting accurate color. It does not ensure accurate color.
2- Sometimes, the color bars can be inaccurate compared to the levels in the rest of the tape.
In FCP, only use the color bars generator. Do not import images.
On some cameras, the color bars don't reflect the levels set on the camera.
3- Calibrating monitors
The blue gel trick (by itself) doesn't work very well. Also, some consumer monitors can't be calibrated to color bars at all (because they decode the colors funky).
4- That being said, color bars can be useful in calibrating broadcast monitors and in making broadcast masters (even if mastering on a digital format, broadcasters do want bars on the tape).
It is only one part towards getting accurate color. It does not ensure accurate color.
2- Sometimes, the color bars can be inaccurate compared to the levels in the rest of the tape.
In FCP, only use the color bars generator. Do not import images.
On some cameras, the color bars don't reflect the levels set on the camera.
3- Calibrating monitors
The blue gel trick (by itself) doesn't work very well. Also, some consumer monitors can't be calibrated to color bars at all (because they decode the colors funky).
4- That being said, color bars can be useful in calibrating broadcast monitors and in making broadcast masters (even if mastering on a digital format, broadcasters do want bars on the tape).
bbalser
Veteran
As for your question about if CBs are put before everything, "no", they aren't. If you lay CBs to your project, it should be because the broadcast facility you are handing it to specifies what they want. Let them decide if they are there or not, for how long, etc. Aside from that, they calibrate, that's all.