نتایج جستجو برای: vector lattice

تعداد نتایج: 287231  

1994
Ram Zamir Meir Feder

W e present several results regarding the propert ies of a random vector, uniformly distributed over a lattice cell. This random vector is the quantization noise of a lattice quantizer at high resolution, or the noise of a dithered lattice quantizer at all distortion levels. W e find that for the optimal lattice quantizers this noise is wide-sense-stat ionary and white. Any desirable noise spec...

2014
Lizhi Zhang Mingrui Zhang Qinghe Pan Tao Wang Zhijie Zhao Xuesong Jin

As the digital information must be stored and recovered in an effective ways, it is necessary to compress data in image coding, wavelet transform and lattice vector quantization are adopted in this paper to improve the compression effective of image coding. We first propose the two dimensional spatial wavelet decomposition of image, and then we present lattice Vector Quantization coding scheme ...

Journal: :Journal of Physics A: Mathematical and Theoretical 2008

Journal: :Transactions of the American Mathematical Society 1978

1997

We nd the shortest non-zero vector in the lattice of all integer multiples of the vector (a; b) modulo m, for given integers 0 < a; b < m. We reduce the problem to the computation of a Minkowski-reduced basis for a planar lattice and thereby show that the problem can be solved in O(log m(log logm) 2) bit operations.

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