#2545: Filter EBU R128 - add True Peak valuation
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Reporter: grahamsch | Type:
Status: new | enhancement
Component: | Priority: normal
undetermined | Version:
Keywords: | unspecified
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
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Hi,
The EBU R128 filter is very useful.
An extra feature that would useful is the evaluation of True Peak.
I'm not skilled enough to assist with implementation.
The steps are explained in the spec in the last Annex 2 at:
http://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-
BS.1770-3-201208-I!!PDF-E.pdf
Basically 4x over sampling needs to occur by placing 0's between the
samples, then a low-pass "interpoloation" filter needs to occur to remove
the high frequency noise created in the over sampling process, then the
true peak values can be retrieved.
(this is a guess)
Thanks,
Graham
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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2545>
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