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Hi,
There seems to be a slight error in the header format image. According to the standard, the sync word is 11 bits and the version ID 2 bits. In the image, the sync word is 12 bits and version ID 1 bit.
-Kristian — Preceding unsigned comment added by 77.88.71.190 (talk) 09:15, 13 December 2012 (UTC)[reply]
The “Licensing and patent issues” section lists among the possible causes of the network effects causing perpetuation of the format the lack of DRM. Is that still relevant nowdays, when Ogg Vorbis and FLAC have no DRM? Is it about AAC or WMA not replacing MP3 as the most popular non-free format? --AVRS (talk) 21:30, 4 January 2013 (UTC)[reply]
The illustration of mp3 file structure, https://en.wikipedia.org/wiki/File:Mp3filestructure.svg, indicates that MP3 sync word is twelve bits, all 1. However, some other sources I've consulted indicate that the sync word is only 11 bits:
Please advise. Aldebrn (talk) 15:46, 11 September 2013 (UTC)[reply]
The "Encoding audio" section states, "During encoding, 576 time-domain samples are taken and are transformed to 576 frequency-domain samples. If there is a transient, 192 samples are taken instead of 576." This needs more context. 576 samples per what? I assume "per frame", but this needs to be explained in the article by someone more familiar with the technology. - dcljr (talk) 02:47, 8 July 2014 (UTC)[reply]
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The article only lists a few patents that are still active. I've collected a list from various web articles that discuss MP3 licensing. I can't verify if this list is exact, exhaustive, or if these are related to MP3 or just MPEG-? layer ? formats in general.
Some sources:
At least the last source is too optimistic. As an example, it claims that patent 5924060 expired in 2011. You can see from http://www.google.com/patents/US5924060 that they paid the fee (year 12) a bit late in 2011 so it should be valid at least until 2014-2015. Google claims they haven't paid the latest year (16) fee yet so the current situation is not clear, but I can't see why it wouldn't be enforceable until 2017. If you infringe the patent in 2017, you can still be sued until 2019.
2001:2003:F638:A000:BE5F:F4FF:FE76:8CA0 (talk) 02:33, 18 January 2016 (UTC)[reply]
I verified the expiration dates of the mentioned patents with http://www.patentcalculator.com/Default.aspx and got
The article should be fixed regarding patent number 5924060. The calculated expiration date halves the time Mp3 is still encumbered by patents. There's only 166 days left before mp3 is totally patent free. 84.231.13.172 (talk) 04:20, 1 November 2016 (UTC)[reply]
From the article:
Note that these three patents were filed in 1997, so it is highly unlikely that they read on decoding of MPEG-1 layer 3 audio, since the 1997 was well after the 1993 MPEG-1 specification.Jrincayc (talk) 03:24, 30 April 2016 (UTC)[reply]
References
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119.128.5.157 (talk) 05:51, 3 August 2016 (UTC)[reply]
Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format. Jeh (talk) 06:28, 3 August 2016 (UTC)[reply]
Read here https://www.iis.fraunhofer.de/en/ff/amm/prod/audiocodec/audiocodecs/mp3.html
So does that mean ALL patents have expired and no one needs to pay ever anymore? Even the one last patent as wikipedia says that will expire end of this year? -- 5.145.128.4 (talk) 12:19, 17 May 2017 (UTC)[reply]
Ford, Eamonn (14 July 2020). "The MP3 At 25: How A Digital File Dynamited The Music Industry". The Quietus.
Blue Rasberry (talk) 13:31, 22 July 2020 (UTC)[reply]
I remember it differently; the pro version of l3enc was distributed as 'warez' and was the golden standard (most people encoded to 128 joint-stereo), there was also another encoder that was simpler to use but didn't sound as good and created files ending in .!!s (you had to rename them manually to .mp3) but was quite a bit faster than the Fraunhofer encoder. After some time there was a commercial encoder by Xing that took on Fraunhofer with their own encoder. One of the things coming out of this battle was the variable bit rate variant, encoding up to 320 etc.
Just putting it here in talk, as those who were around will probably remember this, but of course there's no official publication that would back this up. — Preceding unsigned comment added by 159.2.7.215 (talk) 19:37, 28 March 2021 (UTC)[reply]
In the section History>Development when the members of the ASPEC group are listed, it says "Deutsche" (as in German, the adjective) right after France Telekom. Was this meant to be Deutsche Telekom? Skylar Mlem (talk) 12:20, 24 October 2023 (UTC)[reply]
