quantization error

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quantization error

The difference between an analog wave and its digital representation. Also known as "quantization noise." See quantization.
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These low redundant data are easier to be compressed by the entropy coding (e.g., Huffman [6]), and the high frequency of small values close to zero will also limits the intensity of quantizing noise. While reducing the amount of bits, it is still expected to obtain the improvement of reconstruction quality, and therefore the another objective of this paper is to propose an efficient reconstruction algorithm.
To make up the performance degradation resulting from the inefficient SQ, some reconstruction algorithms [9],[10] were specially designed to resist quantizing noise, and but the fundamental causes cannot still be addressed only through an optimization of the reconstruction process.
It is obvious that the difference after removing space-time redundancy can be represented using far fewer bits than the original CS measurement vector, and meanwhile the Laplacian distribution of difference is also helpful to suppress the quantizing noise of SQ [2].