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RE: TPL ? n/t

Posted by Mr_Steady (A) on September 24, 2015 at 06:33:58

In Reply to: TPL ? n/t posted by reuben on September 24, 2015 at 06:22:38:

Maybe this will help.

>"Since loudness measuring is based on an algorithm that builds on a study of subjective perception, in theory, program material that complies with the determined LRA and Program Loudness of a certain broadcast standard can in fact overload if normalized the traditional way (quasi-peak or sample-peak). Therefore, normalization is also part of many broadcast standards, and to comply, broadcasters must use a true-peak meter.

Many loudness meters have a built-in true-peak meter, and what sets the true-peak meter apart from sample-peak meters is a special algorithm - donated by TC - that not only looks at the actual samples, but also inter sample peaks. In effect, the true-peak mater can unveil peaks in between actual samples that would otherwise cause distortion. Therefore, a true-peak meter actually 'goes beyond 0 dB'. A reading using a traditional sample-peak meter that displays a max of e.g. -0.2 dB could go as far as +3 dB on a true-peak meter reading.

Please note that this does not indicate acceptance of exceeding 0dB on a true-peak meter, but it provides a more precise reading that helps in normalizing program material without compromising the quality of the audio. As an example, the max value of normalized program material according to the EBU R128 standard is -1 dBTP (dB True-Peak)."


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• http://www.tcelectronic.com/loudness/loudness-explained/   (Open in New Window)

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