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EURASIP Journal on Advances in Signal Processing
Fig. 2 | EURASIP Journal on Advances in Signal Processing

Fig. 2

From: Quantization in zero leakage helper data schemes

Fig. 2

Examples of adaptating the genuine user PDF in the verification phase. FQ does not translate the PDF; QIM centers the PDF on a quantization interval; LQ uses a likelihood ratio to adjust the quantization regions. a Fixed equiprobable quantization. b Quantization Index Modulation. c Multi-bits based on likelihood ratio [6]

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