Talk:MPEG-1
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[edit] Phases and Parts and Layers
This is actually not all true, as far as I know. The 1 and the 2 in MPEG stands for the Phase it usually deals with, it's not "MPEG-1 Audio Layer 3", it's "MPEG Phase 1 Layer 3". You should ask the inventors, but as of this day, the software deals with the phases on that level (see MP3 discussion page).
- Response: No, I'm afraid not. Refer to the official MPEG sites and their terminology - e.g., the MPEG official site and the MPEG Industry Forum site. For example, MPEG-21 is not the 21st "phase" of MPEG work. The suffix is just an identifier for a set of standardized technologies that are associated in some way (in particular, it identifies those Parts sharing the same ISO/IEC standard number, which in the case of MPEG-1 is 11172 and in the case of MPEG-2 is 13818). And sometimes multiple phases of work are found within one MPEG suite (e.g., the two distinct generations of audio codec designs within MPEG-2). And if you say MPEG-1 Layer 3, you're leaving out the Part number that tells you where to look for the Layer number, because Layer 3 is something defined only within Part 3. You have to either say "Audio" or "Part 3" (which are synonymous terms in MPEG-1 and MPEG-2) to indicate which part you're referring to. When you say "the software", I don't know what software you are referring to. Are you referring to the software found in MPEG-1 Part 5? Pangolin 08:30, 12 Mar 2005 (UTC)
[edit] Improvements
Original posted on main article by Daniel.Cardenas:
"Please enhance this article. Topics that need addressing are:
- How is compression achieved
- Simple diagram that shows the compress and decompression process"
AlyM comment: The standard 'closed-loop compression' diagram seen on many video compression overview papers may be useful here. AlyM 10:09, 23 April 2006 (UTC)
[edit] patents/licensing?
The MPEG-4 article covers patents and licesnsing, should the MPEG-1 article have an IP section? Or is it patent-free? Mike Linksvayer 16:46, 18 December 2006 (UTC)
