Non-uniform quantizer Quantization regions need not be of same length Quantization levels need not be at midpoints Complex optimization over 2N variables ° Approach Given quantization regions, what should the quantization levels be? What should the quantization regions be? Solve for quantization levels first (given region (a; 1, a)) Minimize distortionNon-uniform quantizer • Quantization regions need not be of same length • Quantization levels need not be at midpoints • Complex optimization over 2N variables • Approach: – Given quantization regions, what should the quantization levels be? – What should the quantization regions be? • Solve for quantization levels first (given region ( ai-1, ai)) – Minimize distortion Eytan Modiano Slide 9