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Apparatus for quantizing an input group of data samples into one of N quantized groups of data via a process on less than N/2 reference groups of data samples
Apparatus for quantizing an input group of data samples into one of N quantized groups of data via a process on less than N/2 reference groups of data samples
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机译:通过对少于N / 2个参考数据样本组的处理将输入数据样本组量化为N个量化数据组之一的设备
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摘要
A quantizer, which converts an input group of data samples into one of N quantized groups of data samples, does so by performing several dot products and compares. Each dot product is between the input group of data samples and a reference group of data samples u.sub.x, and each compare is with the dot product result and a constant k.sub.y. All of the reference groups of data samples and all of the constants are stored in a memory. This memory holds only N-1 constants and less then N/2 reference groups of data samples. A memory saving of several thousand percent is achieved by limiting the memory to hold no more then 2r reference groups of data samples where r is the number of samples in the input group, or no more then 2 log.sub.2 N reference groups of data samples.
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