提高音频信号的响度：保持音频质量的感知激励方法
Increasing loudness in audio signals: a perceptually motivated approach to preserve audio quality
摘要：
我们提出了一种方法，以保持主观感觉的音量的音频信号，在同一时间，降低其绝对峰值。我们专注于在不影响感知音频质量的情况下实现这一目标。例如，这对于最大化扬声器的感知再现水平是特别有用的，其中简单地放大信号幅度以及因此它们的峰值由于已经受限的物理设计而受到限制。特别是，我们最小化的绝对峰值的基础上的听觉掩蔽的约束。这限制了原始信号和修改后的信号之间的感知差异。此外，该约束可以被调谐并且允许控制所得到的音频质量。我们将结果比较作为峰值降低的函数的响度和音频质量。这些结果表明，我们的方法提出了最好的权衡响度和音频质量相比，经典的方法压缩和裁剪的基础上。
英文摘要：
We present a method to maintain the subjective perception of volume of audio signals and, at the same time, reduce their absolute peak value. We focus on achieving this without compromising the perceived audio quality. This is specially useful, for example, to maximize the perceived reproduction level of loudspeakers where simply amplifying the signal amplitude, and hence their peak value, is limited due to already constrained physical designs. In particular, we minimize the absolute peak value subject to a constraint based on auditory masking. This limits the perceptual difference between the original and the modified signals. Moreover, this constraint can be tuned and allows to control the resulting audio quality. We show results comparing loudness and audio quality as a function of peak reduction. These results suggest that our method presents the best trade-off between loudness and audio quality when compared against classical methods based on compression and clipping.
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