[M4IF Technotes] Why no MPEG-5, 6, 8, etcetera

[Rob Koenen]

see http://mpeg.telecomitalialab.com/documents/koenen/mp4ieee.htm
notably the inset 
http://mpeg.telecomitalialab.com/documents/koenen/mpegsb2.htm
MPEG-21 is so different from the other MPEG's again that if deserved
a completely different number - compare e.g. to JPEG 2000. 
Rob
> -----Original Message-----
> From: Ben Waggoner [mailto:ben   interframemedia.com]
> Sent: Sunday, November 25, 2023 14:21
> To: MPEG4 technical notes (E-mail)
> Subject: [M4IF Technotes] Why no MPEG-5, 6, 8, etcetera
> 
> 
> Folks,
> 
>     Not a deep question, I'd guess, but does anyone have any 
> insight into
> how MPEG version numbers are chosen.  MPEG-1 and -2 make 
> sense, and I know
> -3 was going to be the HD spec, which was instead rolled back 
> into -2.  And
> then we have -4.  But why the big jumps then to -7 and -21?  
> Were there a
> bunch of proposals out there that didn't go anywhere, or are still in
> progress?  Was room left for additional intermediate versions 
> (ala the US
> Bankruptcy code, which originally only had odd numbered chapters)?
> 
> Ben Waggoner
> Interframe Media <http://www.interframemedia.com>
> Digital Video Compression Consulting, Training, and Encoding
> 
> 
> 
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