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首页> 外文期刊>Transactions on Emerging Telecommunications Technologies >Two‐dimensional radial i μ/iμ ‐law companding quantiser for Laplacian source
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Two‐dimensional radial i μ/iμ ‐law companding quantiser for Laplacian source

机译:二维径向iμ -law law的量化量子,用于laplacian源

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Abstract This paper provides analysis of two‐dimensional radial μ ‐law companding quantiser for quantisation and coding of a signal that has Laplacian distribution. Closed‐form expressions are obtained, both for the distortion and the bitrate of an output signal. An approximate expression for the required number of radial levels is also given, as well as an algorithm for computing its exact value. Complete procedure is demonstrated on a few numerical examples, and a comparison is performed with classical scalar μ ‐law companding quantiser. It is shown that our model improves maximal SQNR value for 3.5 dB, and has narrower characteristics in a wide range of input signal power. Among many others, the application in the speech coding is described in details.Copyright © 2013 John Wiley & Sons, Ltd.
机译:Abstract 本文提供了两维径向的分析 i> law的量化量化器用于具有拉普拉斯分布的信号的定量和编码。 对于输出信号的失真和比特率,获得了闭合形式表达式。 还给出了所需数量的径向水平的近似表达,以及用于计算其确切值的算法。 在一些数值示例中证明了完整的过程,并与经典标量μ law构成定量器进行了比较。 结果表明,我们的模型改善了3.5 dB的最大SQNR值,并且具有较窄的特性,以广泛的输入信号功率。 除其他许多内容外,详细描述了语音编码中的应用程序。 儿子有限公司

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