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Author Topic: VI Test File Martin McCaffery Film God Posts: 2481 From: Montgomery, AL Registered: Jun 99 posted 04-21-2018 03:50 PM                        We just had our new hearing assist devices installed. At the time of install, we didn't have any films or trailers with a VI track, so we didn't give it a full test. We currently have a movie that says it is 5.1_VI, but there is nothing but static in the headphones. It is a foreign language film, so maybe the VI was in Spanish and not included. Is there a test file out there anyone has or knows about that we could ingest and test the VI system?  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 04-21-2018 06:39 PM                     Very easy to make your own with DCP-o-matic. While it may take a few minutes to learn it, you can at least be sure what you put into which audio channel. Or, try this: http://isdcf.com/SMPTE-DCP-Content/SMPTE_TST-B1B2Q_S_EN-EN-CCAP_51-HI-VI_2K_ISDCF_20161007_TCF_SMPTE.zip These 5.1 and 7.1 DCPs have all channels populated up to 14, aside from testing HI/VI channel assignment, they are also useful to check wether your server/audio processor uses proper channel mapping - HI/VI, Lc/Rc (9/10), DBOX and SMPTE SYNC tracks should not be audible in the auditorium speakers. - Carsten  |  IP: Logged Stephan Shelley Jedi Master Film Handler Posts: 854 From: castro valley, CA, usa Registered: Nov 2014 posted 04-21-2018 08:13 PM                     The Dolby 7.1 channel ID clip has "visually impaired" stated on channel 8 and "hearing impaired" on channel 7.  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 04-21-2018 09:32 PM                     Static is odd, you should just get silence if the wiring or configuration is off. How are you getting the HI/VI signals to your assistive system? This is not always simple.  |  IP: Logged Harold Hallikainen Jedi Master Film Handler Posts: 906 From: Denver, CO, USA Registered: Aug 2009 posted 04-21-2018 10:32 PM                        Some test content is also available at http://ftp.uslinc.com/ftp/TestContent/index.htm . Any more details on the system and how it is configured?, Harold  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 04-22-2018 02:18 PM                     quote: Stephan Shelley The Dolby 7.1 channel ID clip has "visually impaired" stated on channel 8 and "hearing impaired" on channel 7. I just looked up our Dolby 7.1 channel ID clip. It doesn't state HI or VI in the CPL, and channel 7/8 and 9/10 contain no audio. These 5.1 and 7.1 channel ID DCPs are pretty old, though, at least 5-6 years. Admittedly, every 7.1 channel test DCP should have HI and VI populated with warnings so to easily recognize mapping/wiring issues. - Carsten  |  IP: Logged Martin McCaffery Film God Posts: 2481 From: Montgomery, AL Registered: Jun 99 posted 04-24-2018 11:34 AM                        Thanks for the files. Using the SMPTE file I do not get anything on the VI track. Don't get anything on the HI track either, but that is because it is split off (see below). Do get sound for all of the appropriate channels through the headphones from the split off HI. Waiting to hear back from our installer. Setup is a Dolby CP-650 with an Odyssey digital board that the new HI/VI board rides on. The HI is split off input comes from the HI out on the CP 650 so we can use the HI for DVD's etc. Using QSC IRH-281 headphones.  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 04-24-2018 01:52 PM                     Martin - both CPLs of that SMPTE test package has audio on all 14 channels that make up the audio MXF files. Every channel carries a short attention signal and channel announcement. There is no simultaneous audio, though, so you need to listen through the whole DCP to get a chance to hear all channel indicators. But you know that already. HI and VI are on the same AES pair usually (if you don't use a special per-channel mapping in the server). So, if the HI is split off, I guess the VI is on the same split-off. Do I remember right that you use a Christie IMB-S2? As Harold says, I guess we need to know a bit more about the system configuration and wiring. - Carsten  |  IP: Logged Stephan Shelley Jedi Master Film Handler Posts: 854 From: castro valley, CA, usa Registered: Nov 2014 posted 04-27-2018 03:20 PM                     Carston, The Dolby 7.1 channel ID does verbal ID the HI and VI channels. One I have heard it. Two here is the description from the Dolby Customer website: Dolby Surround 7.1_F Channel ID (posted 16 April 2013) This Test Chart can also be used to verify correct routing of Hearing Impaired (HI) and Visually Impaired Narration (VI-N) channels Was the system you are referring two have the ch 11/12 rerouted to 7/8 for 7.1?  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 04-27-2018 05:42 PM                     Stephan - the Dolby channel ID DCP that I have simply are different from those you know, that's all. I know for sure that mine do not include any audio on the HI and VI channels because I loaded the bare audio MXFs into an editor. There is nothing. I mentioned this explicitly so that no one is lead into thinking that any Dolby channel ID has signals on HI/VI. Martin has a config/wiring issue to solve, so he has to be absolutely sure that his testfiles do contain HI and VI on the proper channels. - Carsten  |  IP: Logged Stephan Shelley Jedi Master Film Handler Posts: 854 From: castro valley, CA, usa Registered: Nov 2014 posted 04-27-2018 06:17 PM                     The ones in the Dolby Surround 7.1 Audio Test Content folder on the Dolby Customer web site is a source for the test material asked about.  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 04-27-2018 07:34 PM                     I do believe you Stephan, if Martin has access to that Dolby site, he is free to use them for additional confirmation. - Carsten  |  IP: Logged Martin McCaffery Film God Posts: 2481 From: Montgomery, AL Registered: Jun 99 posted 04-28-2018 08:53 AM                        I'll give the Dolby site a check. Meanwhile, turns out when we were originally wired up for Digital, the 7/8 pairs were not connected. So we most likely will be getting a new cable and that should solve the problem.  |  IP: Logged Sean McKinnon Phenomenal Film Handler Posts: 1712 From: Peabody Massachusetts Registered: Sep 2000 posted 05-02-2018 12:10 PM                        really? your installer missed that?  |  IP: Logged Martin McCaffery Film God Posts: 2481 From: Montgomery, AL Registered: Jun 99 posted 05-02-2018 12:54 PM                        At the time we didn't need them, and I didn't know that we would.  |  IP: Logged

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