[Tig] Re; Digital Black
Edgardo Lebron diaz
edgarlebron at hotmail.com
Sat Dec 27 02:08:58 GMT 2008
IRE = international radio engineers
> Date: Fri, 19 Dec 2008 15:02:03 -0500> From: mlbnyc at verizon.net> To: bfriesen at simple.dallas.tx.us> CC: tig at colorist.org> Subject: Re: [Tig] Re; Digital Black> > 2056 subscribers as of December 2008> Sohonet http://www.sohonet.co.uk sponsors the TIG.> Colorist reels: http://reels.colorist.org> ====> > > Digital doesn't speak IRE. 0 IRE is a value of 16 8 bit and 64 in > 10 bit if memory serves..... so that digital 0 would translate to the > negative IRE value.> > Mike> > Michael L. Bittle> Vice President Technical Operations and Quality> PostWorks, New York> 100 Avenue of the Americas, 10th Floor> New York, NY 10013> 212.894.4000 vox, 212-894-4099 fax> www.pwny.com> > "Science, as it turns out, is not an exact science"> > > On Dec 19, 2008, at 2:04 PM, Bob Friesenhahn wrote:> > > 2056 subscribers as of December 2008> > Sohonet http://www.sohonet.co.uk sponsors the TIG.> > Colorist reels: http://reels.colorist.org> > ====> >> >> > On Fri, 19 Dec 2008, rlovejoy at comcast.net wrote:> >> >> So what we appear to need is an accurate digital PLUGE. Has anyone > >> seen one? It would have levels of -2.5, 0, and +2.5 IRE.> >> > The digital image storage normally uses unsigned values so negative > > values are not possible. There is no such thing as a negative value > > for SDI or HDMI. Some formats like EXR could support negative values.> >> > Bob> > ======================================> > Bob Friesenhahn> > bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/> > GraphicsMagick Maintainer, http://www.GraphicsMagick.org/> >> >> > _______________________________________________> > http://reels.colorist.org> > http://www.colorist.org/wiki3> > _______________________________________________> http://reels.colorist.org> http://www.colorist.org/wiki3
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