Itu-r bs.1770

[jahtao]

Dolby Media Meter does not do this with a 4sec time constant. Its stuck at 10sec. There doesn't seem to be a plugin that does.

Keep up with the European market Dolby!!! GRRRRRR

[tom_lowe]

Originally Posted by jahtao

Dolby Media Meter does not do this with a 4sec time constant. Its stuck at 10sec. There doesn't seem to be a plugin that does.

Keep up with the European market Dolby!!! GRRRRRR

You should look at the TC LM5 - I believe the short term metering is variable.

[Whitecat]

And write to Dolby in the meantime. They're pretty receptive to end-user feedback like that, in my experience.

[TiagoJSilva]

I was under the impression that the final EBU recommendation for Loudness metering in Europe had less than 2 months! And it seems very different from ITU's recommendation.

Give Dolby a break, it's summer time, and I'll bet a lot of questions will be put to the EBU, for example, at the IBC. This may not be the final spec!

EBU R128 Loudness normalisation and permitted maximum level of audio signals
EBU Tech 3341 'EBU Mode' metering to supplement EBU R 128 loudness normalisation
EBU Tech 3342 Loudness range: A descriptor to supplement EBU R 128 loudness

Now, if someone would kindly explain to me why EBU is not keeping the max level of 5.1 streams at -3dBTP to allow for downmixing, I'm all ears. -1dBTP as the maximum seems a bit dangerous. Why not -0.1dBTP, then? Be brave!

If I was able to be at the IBC, I'd have some questions to ask.

[tom_lowe]

Be interesting to see what the Beeb go with as they usually pretty much ignore the EBU.

[thierryd]

I was at IBC and talked to Florian Camerer, chairman of the EBU PLOUD group. Apart from the documents mentioned by Tiago below, there are 2 other EBU technical documents 3343 and 3344 (almost ready) with guidelines for production and distribution of programmes in accordance with EBU R128.

R128 is in the final stages now and should see implementation with various european broadcasters in 2011.

-1dBTP was chosen because oversampling peak meters can still have a small margin of error with real peak reading (about 0.5dB).
Remember that there is still a lot of stereo sound production and the -1dBTP combined with the -23LUFS gives a lot more headroom than current methods.
One can argue about the ceiling for 5.1 in broadcast, to avoid downmix problems, but OTOH the goal is not to hit that ceiling all the time.

At the Dolby booth I talked to a Dolby rep about DMM2 and he said there were plans to implement R128 in 2011. It seems the logical thing to do, if they would like continue selling DMM2 (an already very interesting product, that I like for its features) in Europe.

BTW the short-term loudness time window is 3sec instead of the 4sec mentioned above. Momentary loudness is 400ms.

Greetings,

Thierry

Originally Posted by TiagoJSilva

I was under the impression that the final EBU recommendation for Loudness metering in Europe had less than 2 months! And it seems very different from ITU's recommendation.

Give Dolby a break, it's summer time, and I'll bet a lot of questions will be put to the EBU, for example, at the IBC. This may not be the final spec!

EBU R128 Loudness normalisation and permitted maximum level of audio signals
EBU Tech 3341 'EBU Mode' metering to supplement EBU R 128 loudness normalisation
EBU Tech 3342 Loudness range: A descriptor to supplement EBU R 128 loudness

Now, if someone would kindly explain to me why EBU is not keeping the max level of 5.1 streams at -3dBTP to allow for downmixing, I'm all ears. -1dBTP as the maximum seems a bit dangerous. Why not -0.1dBTP, then? Be brave!

If I was able to be at the IBC, I'd have some questions to ask.

[neilwilkes]

It still remains to be seen how many (and who) will take this up & implement it.
A BS kite does not necessarily make an adopted standard.......
we live in hope though, as the current situation is intolerable.
Every time I switch on the TV these days I have to have one hand on the volume dial.......the disparity is absolutely unbelievable.

[TiagoJSilva]

Originally Posted by neilwilkes

It still remains to be seen how many (and who) will take this up & implement it.
A BS kite does not necessarily make an adopted standard.......
we live in hope though, as the current situation is intolerable.
Every time I switch on the TV these days I have to have one hand on the volume dial.......the disparity is absolutely unbelievable.

The bigger question of course, and one that can't be forced by a standard, is if TV stations will affront their masters and measure the Leq(RLB) of advertisements, punching in the result as metadata on ingestion. I do not believe the TV networks have the guts to bite the hand that feeds them. They talk the talk, will they walk the walk?

Otherwise, you see where this is going: ads will be wide open at -1dBFS, crunched with L3 just like a CD.

[nathand]

Originally Posted by TiagoJSilva

The bigger question of course, and one that can't be forced by a standard, is if TV stations will affront their masters and measure the Leq(RLB) of advertisements, punching in the result as metadata on ingestion. I do not believe the TV networks have the guts to bite the hand that feeds them. They talk the talk, will they walk the walk?

Otherwise, you see where this is going: ads will be wide open at -1dBFS, crunched with L3 just like a CD.

Not true and not possible. That is the purpose of the LUFS score. There is no way you can be livin' at -1dBFS and get a -23LUFS.

Here in the US, digital network television is currently proving that balanced levels throughout the broadcast and between stations is possible. Was anyone watching NFL opening weekend? Very balanced between program and spots. (LA, Time Warner - HD)

[TiagoJSilva]

Originally Posted by nathand

Not true and not possible. That is the purpose of the LUFS score. There is no way you can be livin' at -1dBFS and get a -23LUFS.

Here in the US, digital network television is currently proving that balanced levels throughout the broadcast and between stations is possible. Was anyone watching NFL opening weekend? Very balanced between program and spots. (LA, Time Warner - HD)

I hope so. I certainly hope so. Has anyone seen the Gefen Auto Volume Stabilizer?