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  1. 29th Mar 2013 13:21 #1
    Brad
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    Cause I don't. They are from the end of "The Ultimate Oz" LaserDisc.

    Just going by the effect I see, I'm guessing they are supposed to test comb filter performance. For the first 3 frames in each case, the image has those checkerboard grids. Then random specks pop in and out along a "solid" background for the rest of the pattern.

    Click image for larger version Name: pattern1a.png Views: 254 Size: 342.0 KB ID: 16986Click image for larger version Name: pattern1b.png Views: 263 Size: 316.7 KB ID: 16988Click image for larger version Name: pattern2a.png Views: 392 Size: 631.8 KB ID: 16989Click image for larger version Name: pattern2b.png Views: 318 Size: 614.4 KB ID: 16987
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  2. 29th Mar 2013 17:08 #2
    smrpix
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    I won't bet the farm on this, but I think those may be artifacts left over in the TBC buffer after a tape rollout.
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  3. 13th Apr 2013 09:33 #3
    Brad
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    What is tape rollout?

    Here are all 20 seconds of the patterns, if anyone would like to see. Codec is Ut Video. Be sure to turn down your speakers first.
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  4. 13th Apr 2013 10:29 #4
    smrpix
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    Tape rollout is when the tape either literally runs off the end of the reel or past the end of control track. The videos you've posted do not match your stills, BTW.
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  5. 13th Apr 2013 10:32 #5
    Brad
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    What's tape got to do with this, though?

    The first two are from 13s into the video and the second pair are from 14s.
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  6. 13th Apr 2013 10:41 #6
    smrpix
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    Originally Posted by vaporeon800 View Post
    What's tape got to do with this, though?

    The source master was certainly tape. Whether analog or digital depends on when it was done.
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