Unfortunately it is not possible yet to fully adjust R128GAIN according to ATSC A/85-2011.

ATSC A/85-2011 defines the target loudness to -24 LKFS and the maximum peak level to -2 dB TP. BS.1770-3 makes a low pass filter mandatory and removes any DC processing.Īs far as I can see ATSC A/85-2011 refers to BS.1770 and BS.1770-1, i.e. The algorithm for true peak measurement has changed in both versions. There's also no obvious difference w.r.t true peak measurement.īoth, BS.1770-2 and BS.1770-3, have the same concept of loudness measurement using overlapping blocks and gating (as proposed by EBU R128-2010, but with different overlap and different gating threshold).

Both versions have no concept of overlapping blocks and gating. But you could easily argue both cases, which is why I hope that the ATSC will revise A/85 document to make this explicit.Īs far as I can see there is no practical difference between BS.1770 and BS.1770-1 w.r.t loudness measurement. From what I've seen, broadcasters and manufacturers have concluded that A/85 refers to the original BS.1770 because that's what existed when the A/85 was published, and not BS.1770-2. However, my experience is opposite to yours. Quote from: Goran Tomas on 11:27:19 Indeed, the A/85 is unclear which BS.1770 standard it refers to and this has generated some confusion in the broadcast industry.