Please help understand this image processing lecture notes on DPCM

ok I understand that E(.) is subject to the assumptions listed on page 1

Please help me understand page 2;

how does it help reduce transmission noise and where do they get the figures for the predictors.. 0.97, 0.5, 0.75 etc.?

Finally, what is delta h and delta v at the bottom and how do they come to these?

Thanks in advance.
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page2.jpg
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jtiernan2008Asked:
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thehagmanConnect With a Mentor Commented:
Apparantly delta h is the *h*orizontal and delta v the *v*ertical absolute difference to the neighbour.
Thus in (4), if only little horizontal change occurs, the more interesting vertical neighbour is chosen and vice versa
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