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Old 4th February 2024, 04:32   #27  |  Link
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Originally Posted by benwaggoner View Post
Originally Posted by FranceBB View Post
Very nice.
My only fear is that MPEG-LA will try to kill H.264 once a large enough number of patents expires (which would really be a shame).
MPEG-LA doesn't provide any tools, standards, etcetera. Once all relevant patents have expired, they'll presumably shut down teh licensing program because there would be nothing to license. But the H.264 ecosystem would keep on trucking, just without patents or licensing to worry about.
One risk is that, as patents expire, the companies with still-active patents each go their own merry way so they can milk as much of their old patents as possible. This could make H.264 more costly to license.

This is why I am interested in seeing how many patents with a priority date before 1st March 2005 remain active after that date (or realistically, after the end of 2025 to account for minor extensions). In the meantime, H.264 is just too ubiquitous to die in the next 2 years.

Originally Posted by FranceBB View Post
Very nice. this is what Dolby did when the AC3 patents expired as they pushed for E-AC3 and now AC4...
Personally, I am not necessarily annoyed by the Dolby formats themselves but the lack of a stereo AAC secondary stream when a Dolby audio format is being broadcast. For example, there was an attempt in France to have the UHD terrestrial channels be AC4-only with no secondary stream whatsoever, and I was like "Are those broadcasters (and the governments that oversee them) completely out of their minds? Or completely in the pocket of Dolby?" AC4 is not supported by many TVs and is mostly unsupported on PCs. Fortunately, all those few broadcasters here in Europe that had gone AC4-only have since realised their mistake and have added E-AC3 secondary streams alongside the AC4, so that's a headache avoided, at least here in Europe (don't know how things are in the US).

About E-AC3, I understand the need for it, since the move to H.265 for FullHD content is making the bitrate inefficiency of AC3 more apparent (especially when accompanied by an AAC secondary stream as it should), but E-AC3 can still be a headache when on its own (though not of AC4 proportions obviously). Speaking of which, do we have a list of E-AC3 patents? Some countries (like France) use E-AC3 exclusively even for H.264 broadcasts, so it's almost on topic.

Last edited by kurkosdr; 4th February 2024 at 05:29.
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