Discussion
The quantiser in an image-compression system is a
Answer: A
In an image compression system the quantiser reduces the number of grey levels or coefficient values, and it cannot be reversed, since the original values cannot be recovered from the rounded ones. So it is a lossy element, and it exploits psychovisual redundancy, the detail that the eye does not notice. The lossless elements are the coders that remove statistical redundancy, such as Huffman or arithmetic coding. The answer is option (A).
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