Loudness Re-render 和 5.1Re-render有什么区别？
为了避免在工作流各个节点响度不一致，我们开发了一个Loudness Re-render，如果你是通过独立响度测量软件或工作站插件测量响度，则需要使用Loudness Re-render。具体来讲，这一功能应用了限制器以准确反映在编码方案中使用的响度测量。
需要注意的是，在设置Dialnorm元数据值的时候编码器也会进行响度测量，采取专事专办的策略是非常重要的。如果你通过外部应用和插件对标准的5.1 Re-render 进行响度测量，所测出的响度值与峰值会和编码过程中的测量值有一些偏差。使用Loudness Re-render可以避免测量误差和QC内容不通过的问题。它使用的限制器和渲染器监听上使用的限制器是相同的，都是为了避免削波失真。
What is the difference between the Loudness Re-Render and 5.1 Re-render?
To avoid inconsistencies in Loudness Measurement at different stages of the workflow a loudness specifc re-render has been developed and should be used if loudness measurement is performed externally via a standalone app or DAW plugin. Specifically this re-render employs a limiter to accurately reflect the loudness measure used in our encoding solutions.
As the encoders also perform loudness measurement when setting the dialnorm metadata value it is important to use an “apples to apples” approach. If a standard 5.1 re-render is used for loudness measurement with external applications and plug-ins, the loudness measurement and peak values could diverge from the measurement performed in the encoder. The loudness re-render should be used to avoid inaccurate measurements and content rejections during the QC process. The limiter used is the same limiter available for use on the monitor outputs of the renderer and is used to avoid clipping.
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