Category: Technician Toolbox

mp4 Samples of Technicians Toolkit DCPs

This first DCP is an idea gone mad. It started as just a basic grey scale pluge, then it was noticed that there are 24 blocks on screen which led to a chasing dot per frame…then the idea crossed – hey, you must put a pop white patch in case someone has one of those cool pop sync devices! …but who wants to have a screen of white to blind them after all the grey? How about red, it goes with black…at least it did in the days of film. Who know why I chose the star burst. Tell me if you want something different.

Just an aside: A little research and it turns out that the reason for red lights in the developers lab had less to do with night vision as much as the way that film didn’t get exposed so quickly…or some such – seems kind of illogical now that I read it in my own handwriting. Anyway, there is something to the idea of maintaining night vision…the red doesn’t trigger the rods as the white flash would.

This 2Pop Sync test DCP repeats 6 puts the pop tone in different 5.1 speakers around the room. There is a bit of a cheat on the .1 speaker. That is, instead of a 1 frame long 1k tone, it is a 240Hz tone. Let’s hope that everyone is rolled off by 1k, though who wants to bet that many aren’t. Anyway, the last set puts the pop in all speakers.

Do you have some simple articles that you have made to teach the lightly trained person in audio and/or picture. Let me know in the Contact link above.

Thanks. C J

Here is a QuickTime file of the DCP:

What Means, New SMPTE Pink Noise…and How?

SMPTE ST-2095-1 is a new standard for Pink Noise. It took a great deal of work by a great number of clever people, a lot of listening and testing and tweaking. The cool thing is that it isn’t made with a lot of transiticators, but rather, with digits. This is THE Digital Pink Noise Standard.

Pink Noise has been one of those things that has always been around, and people don’t think much about it. Flick a switch, and there it is. But it took a sophisticated circuit to do right, and it wasn’t always implemented the same…or even well. That is much less likely now because with the standard is a python script that is very easy to implement. Continue reading “What Means, New SMPTE Pink Noise…and How?”