my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Digital Cinema Forum   » Encrypted HD-SDI signal type?

Author Topic: Encrypted HD-SDI signal type? Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 08-01-2014 07:05 AM                     Am I right to assume that the encrypted HD-SDI signal from a conventional server towards the projector is still a valid 2k/24p HD-SDI Signal? That is, a full SMPTE 292/372 spec signal, just with garbage content? I am asking towards using it for a timing source. I don't care for the scrambled image content. - Carsten  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 08-01-2014 08:04 AM                     I would have to say yes. It can certainly go through a proper HDSDI switcher and that wouldn't work if it didn't conform.  |  IP: Logged Mattias Mattsson Film Handler Posts: 90 From: Göteborg, Sweden Registered: May 2007 posted 08-02-2014 12:12 PM                     A related question: Is there a way to disable link encryption for uencrypted content on Doremi servers? On dolby servers you can use the linkEncryption.sh script with an OFF argument, but I have not found a way to do the same on a Doremi system.  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 08-03-2014 07:02 AM                     What effect would that have in a typical cinema environment? Would the Dolby still accept the projector for playout, playing unencrypted content okay, but showing scrambled image with encrypted content? Or would it stop playback? - Carsten  |  IP: Logged Marin Zorica Jedi Master Film Handler Posts: 671 From: Biograd na Moru, Croatia Registered: May 2003 posted 08-03-2014 07:15 AM                     If you disable secure link on dolby it will still play unencrypted content, but not crypted.  |  IP: Logged Mattias Mattsson Film Handler Posts: 90 From: Göteborg, Sweden Registered: May 2007 posted 08-12-2014 03:47 PM                     Found the answer to this. Apparantly you could (as root) do: # echo -n 0> /doremi/etc/cinelink to disable link encryption. A value of "2" is the default.  |  IP: Logged Scott Norwood Film God Posts: 8146 From: Boston, MA. USA (1774.21 miles northeast of Dallas) Registered: Jun 99 posted 08-12-2014 04:12 PM                        Wouldn't it make more sense if these systems defaulted to encrypting the HD-SDI link for encrypted content and leaving unencrypted content unencrypted? Or is there a visible on-screen glitch when switching from an encrypted to a non-encrypted signal (or vice-versa)?  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.