signal to quantization noise ratioIn this paper, the design procedure of the piecewise uniform scalar quantizer having segments with widths that form a geometric progression is presented. The proposed quantizer design optimization for the Laplacian source of the unit variance is performed by optimizing ...
UVeQFed [82] proposes to use subtractive dithered lattice quantization by assuming that the scalar quantization is less effective than the vector quantization. This method requires all the workers to use the same compression operator with the same random seed. It does not require any prior knowledg...
The quantization process rounds both positive and negative inputs downward to the nearest quantization level, with the exception of those that fall exactly on a quantization boundary. It quantizes the real and imaginary components of complex inputs independently. In the second step, the block ...
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Consider a non-uniform scalar quantizer with four possible quantization values. Assuming the quantization code book is P={P1, . . . P4}, where Pi<Pi+1 for i=1, 2, 3 and each Pi occurs with probability p(Pi)=Pi for i=1, . . . , 4. Define Dij=|P-Pj|2. Along the lines of...
摘要: Using a recent result on the support of uniform scalar quantization, we optimize uniform polar quantization by choosing the asymptotically optimal support of the magnitude quantizer and deriving the optimal rate allocation between the magnitude and phase quantizers...
et al. A Very Low Bit Rate Video Coding Combined with Fast Adaptive Block Size Motion Estimation and Nonuniform Scalar Quantization Multiwavelet Transform. Multimed Tools Appl 26, 123–144 (2005). https://doi.org/10.1007/s11042-005-6852-9 Download citation Issue DateMay 2005 DOIhttps://doi....
nonuniform quantizationIn this paper high dynamic range nonuniform two-dimensional vector quantization model for Laplacean source was provided. Semilogarithmic A-law compression characteristic was used as radial scalar compression characteristic of two-dimensional vector quantization. Optimal number value of ...
By evaluating these analytical expressions, we show that scalar quantization with a mid-tread uniform threshhold quantizer, followed by perfect Slepian Wolf coding achieves performance which is close to the theoretical Wyner-Ziv rate-distortion bound at low rates....