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Author Topic: APX files on DTS disc? Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 04-20-2015 12:46 PM                     Hi all, just digged up an old DTS disc with the handwritten name 'Mr. Bean' on it. Inserted it into my notebook and found the usual files of a dts cinema CD on it - except there are 5 *.APX files on it, besides the trailer AUD file, TXT, etc. I heard about the transition from AUD to AUE for encrypted feature discs around 2004/2005, but what is APX? Apparently, it is 'Mr. Beans Holiday' from 2007. This is a CD, not a DVD. - Carsten  |  IP: Logged Daniel Schulz Master Film Handler Posts: 387 From: Los Angeles, CA USA Registered: Sep 2003 posted 05-11-2015 01:28 PM                        I'm not 100% sure (memory is hazy), but I think APX was the file format for a disc watermarking system that was being tested back then. The discs were individually watermarked, so that if there was a pirated copy of a movie that surfaced on the internet, and the audio was captured from a DTS disc (either by recording in the auditorium or tapping the analog output), a forensics team would be able to identify which disc was used on that playback. It was pretty cool technology, but in the end cost prohibitive and never saw a rollout.  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 05-11-2015 02:32 PM                     Ah, right, so that indicated files on unique CD-R discs, I assume. Once you're finished completely with Datasat Digital Sound releases and there is no piracy involvement anymore, it's time for a technical history on all these things. Those technologies deserve their legends as well. - Carsten  |  IP: Logged

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