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Author Topic: Dolby Cat No's System Notices Forum Watchdog / Soup Nazi Posts: 215 Registered: Apr 2004 posted 06-19-2012 04:01 AM                 It has been 2639 days since the last post.  |  IP: Logged Jim Henk Master Film Handler Posts: 364 From: San Diego, CA Registered: Feb 2006 posted 06-19-2012 04:01 AM                     Okay, when did the cat151 pink noise test film become the cat151b, and what was the difference? I saw a cat151 for sale for cheap, and now I'm wondering.  |  IP: Logged Mateo Miranda Film Handler Posts: 4 From: Santo Domingo, Republica Dominicana Registered: Apr 2012 posted 06-19-2012 07:16 AM                     Cat. 735 - Auditorium Assist Microphone  |  IP: Logged Tony Bandiera Jr Film God Posts: 3067 From: Moreland Idaho Registered: Apr 2004 posted 06-19-2012 07:51 PM                     Jim, I suspect the 151B is the mylar version.  |  IP: Logged Christos Mitsakis Expert Film Handler Posts: 242 From: Ag.Paraskevi, ATHENS, GREECE Registered: Sep 1999 posted 06-20-2012 11:01 AM                     Jim, Cat151B uses band limited frequency pink noise which makes easier for a "by ear" subjective evaluation of the surround channel level. It was introduced, if I remember correctly, in the early '90s. The original Cat151 has full frequency spectrum pink noise and as such it produces bass heavy front channels. This tricks the ear that the surrounds level is somewhat lower than the center channel and leads to unnecessary boosting from the processor. Tony, Yes, I presume the newer batches of Cat151b are on mylar base. C.  |  IP: Logged Tony Bandiera Jr Film God Posts: 3067 From: Moreland Idaho Registered: Apr 2004 posted 06-20-2012 06:39 PM                     Christos, Thank you for the information. So there are two changes with the 151B.  |  IP: Logged Lonny Jennings Film Handler Posts: 10 From: Boston, MA USA Registered: Feb 2000 posted 06-20-2012 10:36 PM                     I didn't see the Cat. No. 442 70mm switch for the CP65.  |  IP: Logged Scott Norwood Film God Posts: 8146 From: Boston, MA. USA (1774.21 miles northeast of Dallas) Registered: Jun 99 posted 06-21-2012 12:41 PM                        What is the deal with the cat. 384 edgecode reader? It is mentioned in some of the CP65 documentation and appears to be a device that was designed to read some sort of code printed on the edge of the film to tell the processor what sound format was used on the print. Did this thing even exist? Did anyone buy one? Did any lab ever try printing the correct edge codes? It seems like a reasonable idea that should have caught on, but didn't.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 06-21-2012 12:53 PM                        It was a good idea that was stillborn. Dolby had a lot of creative output, some stuck, some didn't. We always said that "a box will appear: SA2, Sa3, SA4 SA5. If it is a good idea, it disappears inside the next major unit." Certainly SR, surrounds, split surrounds come to mind.  |  IP: Logged Manny Knowles "What are these things and WHY are they BLUE???" Posts: 4247 From: Bloomington, IN, USA Registered: Feb 2002 posted 06-21-2012 01:30 PM                     ...and SR-D... ...and (maybe) S-EX ?  |  IP: Logged Tony Bandiera Jr Film God Posts: 3067 From: Moreland Idaho Registered: Apr 2004 posted 06-21-2012 06:59 PM                     quote: Scott Norwood What is the deal with the cat. 384 edgecode reader? Scott, it actually read barcode labels attached to the prints for all kinds of cues. The UA Theatre circuit used them, don't recall any other chain picking them up. UA obviously did not follow what happened to AMC and SDDS  |  IP: Logged Christos Mitsakis Expert Film Handler Posts: 242 From: Ag.Paraskevi, ATHENS, GREECE Registered: Sep 1999 posted 06-22-2012 02:22 AM                     Tony, You're welcome  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 06-22-2012 03:10 AM                       I was involved in the edge code project. I believe the more sophisticated version was Model 278. The one referenced in the 65 manual was a more basic idea to automatically cue an SR print. The idea had a lot of potential but putting all resources into creating SR.D ended the project. The idea was to actually print intelligent bar codes on the fly onto the actual release print so there would be a serial #, time code, scope, flat, start of credits; all sorts of stuff, an early attempt at metadata. There were also printed cues to supplement the ones printed into the release print. There is actually one cinema still running on this system; Grand Lake in Oakland, CA. The UA system was a competing and incompatible system based on a Symbol Technologies hand held bar code reader like the ones you see at retail stores. It had a number of limitations, among them the critical flaw that scanner had to run continually looking for a taped on cue wearing out the laser mirror motor. The Dolby system was a simple slot reader that read the film as it passed by. Ancient history now.  |  IP: Logged Manny Knowles "What are these things and WHY are they BLUE???" Posts: 4247 From: Bloomington, IN, USA Registered: Feb 2002 posted 06-22-2012 03:46 PM                     Those UA cues were too tenacious. Removing them was a pain.  |  IP: Logged System Notices Forum Watchdog / Soup Nazi Posts: 215 Registered: Apr 2004 posted 11-15-2013 07:18 AM                 It has been 510 days since the last post.  |  IP: Logged

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