[QuadList] Quad comparison

[C. Park Seward]

http://www.youtube.com/watch?v=I95CbfX0puk

I have put on youTube, for educational purposes only, a comparison  
between a stock Ampex VR-1200B and an Ampex/Merlin Edition 1200B with  
the NEC digital TBC.

Can you spot which one is on which side?

Yes, the compression makes it difficult to see any difference. Be sure  
to hit the "HQ" button.

The audio is matched to the side of the machine. The left screen is on  
the left channel.

The machines are within one frame. Since DV only compresses in frames,  
I could not trim by a field.

Interesting that some scenes are a perfect match in luminance but  
others are not with the same video settings. That suggests the  
linearity of the systems differ.

Both VTRs look good, but I can see a difference on the master miniDV  
tape. The video was recorded on miniDV and edited in DV with Final Cut  
Pro. That was output to H.264 for the upload to YouTube.

The tape was recorded in Japan in the middle 70s. Both machines were  
cleaned prior to playback and both have the 4.5 MHz low pass filter.  
The Ampex 1200B has  Amtec, Colortec, Vel Comp and Proc Amp,  while  
the Merlin edition has Vel Comp and DOC inside the TBC and no Amtec or  
Colortec.

Best,
Park

C. Park Seward
Visit us: http://www.videopark.com