Which of the following is not a lossy compression technique ?
Arithmetic coding
Lossy techniques discard information that is hard to perceive; JPEG for images and MPEG for video both quantise transform coefficients and are lossy.
Transform based methods such as those built on the FFT are used inside lossy coders, where quantising the coefficients causes the loss.
Arithmetic coding is an entropy coding method that maps the whole message to one number in an interval and reconstructs it exactly, so it is lossless.
Hence, Arithmetic coding.
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