A New THD+N Algorithm for Measuring Today's High Resolution Audio Systems

机译：一种用于测量当今高分辨率音频系统的新THD + N算法

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We present a mathematical definition of Total Harmonic Distortion + Noise suitable for testing high-resolution digital audio systems. This formal definition of the "distortion analyzer" mentioned in AES17 defines THD+N as the RMS error of fitting a sinusoid to a noisy and distorted sequence of measurements. We present the key theoretical result that under realistic conditions a modern THD+N analyzer is well-described by a Normal probability distribution with a simple relationship between relative error and analysis dwell time. These findings are illustrated by comparing the output of a commercial distortion analyzer to our proposed method using Monte Carlo simulations of noisy signal channels. We will demonstrate that the bias of a well-designed distortion analyzer is negligible.

机译：我们提出了适用于测试高分辨率数字音频系统的总谐波失真+噪声的数学定义。 AES17中提到的“失真分析器”的正式定义将THD + N定义为将正弦曲线拟合到嘈杂且失真的测量序列的RMS误差。我们提出了关键的理论结果，即在现实条件下，现代THD + N分析仪可以通过正态概率分布很好地描述，并且相对误差与分析停留时间之间具有简单的关系。通过将商用失真分析仪的输出与我们提出的使用嘈杂信号通道的蒙特卡罗模拟的方法进行比较，可以说明这些发现。我们将证明设计良好的失真分析仪的偏差可以忽略不计。

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《Audio Engineering Society international convention》|2017年|775-780|共6页
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Alfred B. Roney; Steve Temme;
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A New THD+N Algorithm for Measuring Today's High Resolution Audio Systems

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