X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/e381c067c57d8dee000bfa4b8e4080c6ff104789..7d392824cbfd9b845112de4fe1db9b589e00cf10:/blog/index.html diff --git a/blog/index.html b/blog/index.html index 2cb07235b7..77feebc2e6 100644 --- a/blog/index.html +++ b/blog/index.html @@ -19,6 +19,44 @@ +
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In my hand, a pocket book edition of the Norwegian Free Culture book!
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19th August 2015
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Today, finally, my first printed draft edition of the Norwegian +translation of Free Culture I have been working on for the last few +years arrived in the mail. I had to fake a cover to get the interior +printed, and the exterior of the book look awful, but that is +irrelevant at this point. I asked for a printed pocket book version +to get an idea about the font sizes and paper format as well as how +good the figures and images look in print, but also to test what the +pocket book version would look like. After receiving the 500 page +pocket book, it became obvious to me that that pocket book size is too +small for this book. I believe the book is too thick, and several +tables and figures do not look good in the size they get with that +small page sizes. I believe I will go with the 5.5x8.5 inch size +instead. A surprise discovery from the paper version was how bad the +URLs look in print. They are very hard to read in the colophon page. +The URLs are red in the PDF, but light gray on paper. I need to +change the color of links somehow to look better. But there is a +printed book in my hand, and it feels great. :)

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Now I only need to fix the cover, wrap up the postscript with the +store behind the book, and collect the last corrections from the proof +readers before the book is ready for proper printing. Cover artists +willing to work for free and create a Creative Commons licensed vector +file looking similar to the original is most welcome, as my skills as +a graphics designer are mostly missing.

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+ + + Tags: docbook, english, freeculture. + + +
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First paper version of the Norwegian Free Culture book heading my way
9th August 2015
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Measuring and adjusting the loudness of a TV channel using bs1770gain
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11th June 2015
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Television loudness is the source of frustration for viewers -everywhere. Some channels are very load, others are less loud, and -ads tend to shout very high to get the attention of the viewers, and -the viewers do not like this. This fact is well known to the TV -channels. See for example the BBC white paper -"Terminology -for loudness and level dBTP, LU, and all that" from 2011 for a -summary of the problem domain. To better address the need for even -loadness, the TV channels got together several years ago to agree on a -new way to measure loudness in digital files as one step in -standardizing loudness. From this came the ITU-R standard BS.1770, -"Algorithms to -measure audio programme loudness and true-peak audio level".

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The ITU-R BS.1770 specification describe an algorithm to measure -loadness in LUFS (Loudness Units, referenced to Full Scale). But -having a way to measure is not enough. To get the same loudness -across TV channels, one also need to decide which value to standardize -on. For European TV channels, this was done in the EBU Recommondaton -R128, "Loudness -normalisation and permitted maximum level of audio signals", which -specifies a recommended level of -23 LUFS. In Norway, I have been -told that NRK, TV2, MTG and SBS have decided among themselves to -follow the R128 recommondation for playout from 2016-03-01.

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There are free software available to measure and adjust the loudness -level using the LUFS. In Debian, I am aware of a library named -libebur128 -able to measure the loudness and since yesterday morning a new binary -named bs1770gain -capable of both measuring and adjusting was uploaded and is waiting -for NEW processing. I plan to maintain the latter in Debian under the -Debian -multimedia umbrella.

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The free software based TV channel I am involved in, -Frikanalen, plan to follow the -R128 recommondation ourself as soon as we can adjust the software to -do so, and the bs1770gain tool seem like a good fit for that part of -the puzzle to measure loudness on new video uploaded to Frikanalen. -Personally, I plan to use bs1770gain to adjust the loudness of videos -I upload to Frikanalen on behalf of the -NUUG member organisation. The program seem to be able to measure -the LUFS value of any media file handled by ffmpeg, but I've only -successfully adjusted the LUFS value of WAV files. I suspect it -should be able to adjust it for all the formats handled by ffmpeg.

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- - - Tags: english, frikanalen, multimedia, video. - - -
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