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21st September 2022, 21:15 | #1 | Link |
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Patent expiration for E-AC3 (Dolby Digital Plus)?
E-AC3 (aka Dolby Digital Plus) is used exclusively for some terrestrial television broadcasts in Europe. For example:
https://www.digitalbitrate.com/dtv.p...live=3&lang=en https://www.digitalbitrate.com/dtv.p...live=1&lang=en This got me thinking: - Is there a patent list (and anticipated expiration date) for decoding E-AC3? I've tried Googling around and there is no information on the subject. All I can find is people talking about the expiration of AC3 patents and a ETSI patent declaration from 2004 (which, considering how old it is, I am not sure it covers E-AC3). In fact, even pinpointing a "release date" for E-AC3 has also been impossible for me. Even Wikipedia doesn't have that information. Best I can find is that E-AC3 was a mandatory format for HD-DVD, and since the first HD-DVD player was released on 31st March 2006 (and has a "Dolby Digital Plus" badge), this gives us a "worst case" date of 31st March 2006 when it comes to prior art. Does anyone have any information on the topic? PS: The DigitalBitrate website can tell the difference between AC3 and E-AC3 (example of AC3 identified here), so the examples above are not a case of a misidentified stream. You really need an E-AC3 decoder to watch terrestrial TV in some EU countries... Last edited by kurkosdr; 3rd October 2022 at 13:38. |
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dolby digital plus, e-ac3, eac3, expiration, patent |
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