I've done a fair amount of work on a 3ish year old JVC monitor 24 inch similar to the one you mentioned you are using. Most of my work is SD and a handful of HDcam stage shows from a multicam truck shoot. It's noisy when they use audience cutaways when I have to jack up the gain but the main stage scenes are clean. Those JVC monitors have poor performance in low light scenes from my experience. Perhaps they've improved over the years but I've just grown accustomed to relying more on my scope. The blue only is a good way to detect noise because the blue channel is the sacrificial channel when it comes to bandwidth even going back to 3/4 inch days. It stems from the fact that blue is more or less the opposite of most flesh tone so it's less critical to the average viewer. In the linear bays we use to crank up the brightness on the monitors to help see noise in the dark areas. Also a non DC restored black and white monitor would sometimes show anomalies not obvious on other monitors. HTH
PS: I'd love to hear others opinions on the matter too.
--- In Avid-L2@yahoogroups.com, Andi Meek <kwikpasta@...> wrote:
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> No, this is not a connection issue, it was definitely a noisy image. The noise is present on multiple displays. All i can think is that the camera man had the gain whacked up by accident but that wouldn't account for all of the ISOs being noisy unless one guy set up all the cameras which i guess is possible. I wouldn't have expected it from HDCAM either. Although at this point it's not really a problem solving issue more of an inquirey in to how best to detect/display the noise in an image. The next batch of rushes they sent me tonight had far less noise so it's possible they screwed up and didn't want to tell me to save face.
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> My understanding is that most noise is present in the blue signal hence using the blue-only function of the monitor to reveal it. Would anyone more engineer-ey care to elaborate?
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> Cheers
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> Andi
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> To: avid-l2@yahoogroups.com
> From: bncrca@...
> Date: Sun, 8 Jan 2012 23:42:51 +0000
> Subject: RE: [Avid-L2] OT: Best ways to confirm a noisy image...
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> Even though HDCam shows a very fine noise, it,s not any close to what you describe. Could it be your deck or a bad connection?
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> -----Original Message-----
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> From: Andi Meek <kwikpasta@...>
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> Sender: Avid-L2@yahoogroups.com
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> Date: Sun, 8 Jan 2012 23:36:51
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> To: <avid-l2@yahoogroups.com>
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> Reply-To: Avid-L2@yahoogroups.com
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> Subject: RE: [Avid-L2] OT: Best ways to confirm a noisy image...
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> HDCAM. I'm viewing directly from the tape.
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> To: Avid-L2@yahoogroups.com
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> From: bncrca@...
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> Date: Sun, 8 Jan 2012 23:34:31 +0000
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> Subject: Re: [Avid-L2] OT: Best ways to confirm a noisy image...
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> What codec?
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> From: "ripvanmarlowe2000" <kwikpasta@...>
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> Sender: Avid-L2@yahoogroups.com
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> Date: Sun, 08 Jan 2012 23:12:55
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> To: <Avid-L2@yahoogroups.com>
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> It's a bit weird, but i have a show that is providing us with excessively noisey rushes. They claim they're looking at the footage on a grade 1 CRT at their end and cannot see any noise but when i look at it on my grade 1, my JVC DTR24L4D HD LCD and a consumer LCD i can clearly see a fair amount of noise, more than i would want. The rushes they are providing are HDCAM shot on a Sony HDW-790P which i would have thought would be able to give pretty clean blacks. Because the rushes are 1080/50i and they are viewing on a SD CRT this will naturally make the picture they see look a little less noisey right? The footage is interior in a mock-nightclub, so there are areas that are lit and others which are in shadow.
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> In Blue Only mode i can see the noise very clearly although they claim they have also looked at it in blue only too. Other than by pure visual inspection and a monitor just showing the blue signal are there any other ways to test for noise in an image? I have access to HD Tek scopes etc.
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> Any thoughts welcome
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> Search the official Complete Avid-L archives at: http://archives.bengrosser.com/avid/
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> Search the official Complete Avid-L archives at: http://archives.bengrosser.com/avid/
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> Yahoo! Groups Links
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