en.wikipedia.org/wiki/Data_compression#Lossy_2
2 corrections found
In 1999, it was followed by [MPEG-4](/wiki/MPEG-4_Visual "MPEG-4 Visual")/[H.263](/wiki/H.263 "H.263").
This conflates two different codecs. H.263 was an ITU-T standard approved in 1996, while MPEG-4 Visual was developed separately by ISO/IEC a few years later.
Full reasoning
This sentence is inaccurate because it presents MPEG-4 and H.263 as if they were the same 1999 follow-on standard.
Authoritative ITU sources say otherwise:
- The ITU-T recommendation database lists H.263 with an approval date of March 20, 1996.
- An ITU News history of video coding says that, after MPEG-2, ITU developed the first version of H.263 by 1995, while ISO/IEC developed MPEG-4 Part 2 Visual a few years later.
So H.263 did not begin in 1999, and it was not simply the same thing as MPEG-4 Visual. They are separate standards from different standardization tracks, even though they are historically related.
2 sources
- ITU-T Recommendation database — ITU-T H.263 (03/1996)
ITU-T H.263 (03/1996) ... Approval date: 1996-03-20.
- ITU News — VIDEO CODING
As the MPEG-2 project matured, ITU-T's Video Coding Experts Group (VCEG) and the ISO/IEC group MPEG worked separately for a time, with ITU developing the first version of Recommendation H.263 by 1995 and ISO/IEC developing MPEG-4 Part 2 Visual (ISO/IEC 14496-2) a few years later.
[H.264/MPEG-4 AVC](/wiki/H.264/MPEG-4_AVC "H.264/MPEG-4 AVC") was developed in 2003 by a number of organizations, primarily Panasonic, [Godo Kaisha IP Bridge](/wiki/Godo_kaisha "Godo kaisha") and [LG Electronics](/wiki/LG_Electronics "LG Electronics").
H.264/AVC was developed by the ITU-T/ISO Joint Video Team, not primarily by those companies. The named company IP Bridge was not even established until July 2013.
Full reasoning
This sentence is contradicted by official sources.
The ITU states that H.264/AVC was developed by the Joint Video Team (JVT), a collaboration between ITU-T VCEG and ISO/IEC MPEG. The ITU's JVT page says the group was formed in 2001 to develop the specification, and that the first version was completed in May 2003.
The sentence is especially false because it names Godo Kaisha / IP Bridge as a primary developer. IP Bridge's own company page says the company was established in July 2013—about a decade after the first H.264/AVC standard was completed. A company founded in 2013 could not have been a primary developer of the 2003 standard.
So the development attribution here is wrong: H.264/AVC was standardized through the ITU-T/ISO joint standards process, and the named company IP Bridge is chronologically impossible as a 2003 primary developer.
2 sources
- ITU — Joint Video Team
The Joint Video Team was a group of video coding experts from ITU-T Study Group 16 (VCEG) and ISO/IEC JTC 1 SC 29 / WG 11 (MPEG) created to develop an advanced video coding specification. Formed in 2001 ... The first version of the standard was completed in May 2003.
- IP Bridge — Company
Establishment July 2013.