Quote:
Originally Posted by pandy71
Shifts from 4 bit to? Divide 4 bits by 4 and how many bits left?
There is no 8 bit bitdepth but 4 bit, if you loose 2 bits then you loose half of range.
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Look at the calculation Thomas provided - there you will find a division by four, which is a shift by two - or on transistor level just connecting the right wires.
(Again: this is if you would do it digitally, which would probably not be the way it would have been done …)