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B-frames.

Posted May 26, 2010 6:19 UTC (Wed) by eru (subscriber, #2753)
In reply to: This is a badly researched article. by sfeam
Parent article: Swift and predictable reactions to WebM

first among them B-frames,

Didn't B-frames already appear in MPEG-1? Any patent on the idea has expired or will expire soon (drafts of the MPEG-1 spec were published already in 1990 claims this).

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B-frames.

Posted May 26, 2010 11:16 UTC (Wed) by cortana (subscriber, #24596) [Link]

B-frames may have been present in MPEG-1, but that does not mean the patents have expired, in every country, and that there are no other patents that continue the earlier patents, or that are worded differently enough to be considered separate patents, and hence filed later, but similarly enough to still cover the same subject matter.