Aes lecture loudness
From Theover
By theovermob,
I try to report during AES-NL lecture 'Luidheidsverschillen bij TV'.
picture just before part 2
I tried to put the (unperfect mobile phone) picture on before the break was over, which worked!
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This is the aes-nl announcement link [1].
I made short HD video recording containing 3 parts, one for each of the the 3 speakers, of which I made these files available for everyone wanting to see them and use them for non-commercial purposes:
mpeg4, aac audio, 582MByte 1280x720(p) , 256kbps 48kS/s audio, 6 (8 max) mbps video
mpeg2TS, mpeg audio, 103MByte 960x720 wide (16:9) mpeg2 transport stream (can be viewed while downloading) 192 kilobits per second 44.1kS/s mpeg2 audio 1 megabit/sec video
mpeg4, aac audio, 49 MByte 480x270 , 128kbps 44.1kS/s faac audio, 0.5 mbps video
Total length: 10 min 35 sec.
The middle file can be downloaded in realtime from server (or almost realtime), as can the last one, which is clearly of less quality. The first file requires a little over an hour to download of course depending on your internet connection (adsl or some big pipe), but is much better quality.
The HD video was made with a Sony HC-3, read in by firewire (1080i50 mpeg-2 TS 25 Mb/s video, 384 Kb/S mp3 stereo audio) to a Linux computer, transcoded over h264 for de-interlace and smoothing, and downconverted from 1080 to 720 and smaller formats using ffmpeg (on Linux).
This page refered to from here.
Feel free to ad summaries, own pictures (using Upload) or links to them or general comments.
(april 1 ' 09, no aprils´ fool) User:Theover It was a nice location, the media academy, luckily ample parking space, and nice view on trees from the studio where the lecture was. After synchronizing the notebooks the first lecture by Eelco grimm
made clear what the problems are with average and peak loudness measurements, dynamic ranges and the presented LKFS measurements.
Richard van Everdingen spoke about the problems of distributing the many available Tv and radio channels, and the possible adjustements, such as a very slow (2 hour integration time) correction block of the audio loudness. Technical issues like the extra dynamic space for the pre-emphasis of FM signals were presented, too. (BBC open source loudness meter)
Michel Schoepping showed examples with video on the beamer.
At the aes site, there´s the small size but web-page embedded flash version ; http://www.aes-section.nl/lezingen/project%20197/Terugblik197/terugblik197.htm
Some random pictures taken by Theover:
