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An image is to be sampled with a signal-to-quantisation ratio of at least 61 dB. The...

An image is to be sampled with a signal-to-quantisation ratio of at least 61 dB. The image samples are non-negative. The image sample values fall within the range from 0 to 1. How many bits are needed to achieve the desired signal-to-quantisation noise ratio (SQNR)? Assume that the intensities of the image are uniformly distributed over the (0, 1). Note that for a (B+1)-bit quantiser the SQNR is given by: SQNR = 6.02B + 10.81 - 20 log (Xmax/qx). The quantiser input x is bound as follows: |x|

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