I have switched from an NTSC to a LCD high definition TV for monitoring off the bob.

I now can easily switch views of the bob's component, composite and s-Video outputs, and compare that output to Liquid's master  viewer on the computer.

What I am noticing is that the bob's s-video/composite colors match Liquid's master viewer fairly closely, as does s-video output from a DVD player of the same timeline section.

However, the bob's component output appears much redder on the LCD HD tv,  for sure when compared to Liquid's master viewer on the computer , and several degrees redder when comparing the bob's component output to the component output from a DVD player.

I am wondering if others are experiencing the same - and if it is normal that the bob's component output be redder than either it's composite or s-video output ?

Or is there an adjustment on the bob for correcting component output ?

 

   

Can't say I have seen this, I'll look at it tonight.

I reguarly use the component in and out from the BOB. You can adjust the video levels for capture in both EZCapture and the Logging tool but video output is fixed. I have looked at NTSC bars from the timeline to component out of the BOB on a Leader calibrated vector and waveform monitor and they they are exact to specs in terms of levels, chroma and phase.

Lew - do you see any noticeable difference in the output when you switch between component and either s-video or composite ?

If mine seems noticeable and your's doesn't, , could it be some setting my bob, and would it be adjustable ? 

 

There are no settings for the output of the BOB. As I said, the component output of my BOB is dead on. I have not looked at the other outputs on a waveform/vectorscope but just from looking at them on a monitor, they look about right. I am not set up to do A/B/C comparisons here and no longer have access to the scope.

RGB gives a separate output for all three main colours (Red, green and blue), and normally give a better representation of colour then SVIDEO or COMPOSITE. Of course, I can not look on your monitor and see if this is here the case but I can imagine it. It could also be the monitor which give the problem. Do I understand correct it looks redder on the monitor, then feeding via a DVD player ?

 

I have the RGB, s-video and composite connections of  Bob connected to my sharp 19" HD tv.

With Liquid in full screen master viewer on the computer monitor, I can switch between composite, component and s-video outputs from the bob showing on the tv monitor. 

I notice mostly with skin tones that the RGB bob output displayed on the Sharp is redder than the master viewer, but matches quite closely the svideo and composite output displayed on the Sharp.

I have tried to look at color bars with both rgb and s-video output, but really don't see a difference there.

There is no adjustment on the Sharp for RGB only - it's just a picture adjustment that affects the display no matter if using hdmi, component or composite connections.

It was just something that I have noticed and thought that perhaps I needed to adjust the red component output level on the bob - but don't think I can do it.   It's not really a problem - just something I noticed and was curious about.  

   

I'm confused. Are you saying composite, S and component video out of the BOB all essentially match on the video monitor but the video monitor does not match the computer inlay in Liquid. You do realize that computer inlay in Liquid will never display correct colors as it uses totally different color space from a video monitor. You should use a properly setup video monitor as your reference.

Here is what I suggest you do. Read this article. Then you can generate blue bars (as you do not have a switch on your monitor) from Liquid by putting the NTSC bars graphic on the timeline and use the color corrector to pull out red and green completely. Then follow the instructions for how to set up the monitor using blue bars.

....it also depends on if his external monitor inputs are actually Component (YUV),  or if they are RGB - even though the plugs might fit, they are NOT the same thing.... I was going to try and explain it, but wiki does a much better job!     The Pro BOB is definitely YUV....

 http://en.wikipedia.org/wiki/YUV

Looking at the formulae listed, an RGB monitor would indeed display higher Red levels than a YUV monitor fed with the same signals... (and the rest of the picture wouldn't be too accurate as far as colour goes, either...) 

As a general rule, RGB is used for computer displays while Component YUV is used for Video monitors ... (adjustment of the Chroma control won't fix this error! )

As editors, we need to be aware of the different standards (and 'colour spaces') and how they affect devices such as monitors and recorders etc in the 'real world'....

R

I suspect this is just a standard HDV flatscreen and thus would be YUV as are DVD players, etc. But you are right, the computer color space is RGB which is why the computer inlay will not exactly match the video monitor and why he should calibrate the video monitor and use that as his reference. It is never a good idea to use a computer monitor to make judgements about video.

Thanks Lew and Roger for the references.  I will try that.

I know I could well be confused over RGB, YUV etc. - just trying to learn more about it now. I thought they were the same. 

The HD tv plugs are labeled  Y Pb Pg (which may be what Lew said when he said they are probably YUV - like the DVD player).  I was thinking I was getting RGB out of the bob - but as was pointed out - it appears I may be comparing apples to oranges - so to speak.

Anyway, to try to be clearer,  I was comparing skin tones outputs from the bob - one with the Y/G, B-Y/B and R-Y/R output from the bob connected to the HD TV's Y Pb Pg connections,  the others with the s-video and composite connections from the bob connected to the HD TV's composite and s-video in's - and in doing so I noticed the Y/G, B-Y/B and R-Y/R output from the bob  redder in skin tones - and that the composite and s-video connections seeming to match the computer's colors fairly close.

I was calling the Y/G etc. bob connections RGB - which I think is incorrect. So probably confusing the hell out of everyone. 

Like I said, I had never tried the YUV output from the bob before, so it is all new to me - so I was experimenting and when I saw a difference I was just curious why I was getting redder skin tones - and I think you guys probably uncovered the explanation.  I think I will probably stick with S-video.