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Author Topic: Roger Ebert Points Famous Digit Down for Digital Cinema Darryl Spicer Film God Posts: 3250 From: Lexington, KY, USA Registered: Dec 2000 posted 03-13-2002 05:57 PM                    Have you ever had anyone say that they prefer to listen to certain music on vinal rather than CD's. Well one big reason is that when they make an analog source into a digital source they cut out some of the high and low frequencies in order to save space and use less compresion. They say sometimes when this is done either to much is taken away or other frequencies are effected. So in order to save space and compresion for movies what is exactly missing that may be seen with normal projected film.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 03-13-2002 07:47 PM                     Daryl, I think what you meant to say is that the sampling rate is too low on CD's. Thats what actually causes the change(among other things) in sound when transfering from analog to digital(CD in this case). The CD format encompases the full 20 to 20khz spectrum with out loss in that area. Another problem is actually the extremely steep filters that are required on the output of the D to A's. This limits the upper response to 20khz and cuts out all harmoics and overtones. Loosing all this info is what makes the biggest audible difference. With the advent of DVD Audio and SACD this is no longer a problem. Response of DVD Audio disks goes out to 40khz in its worst form. Even higher at 192khz sampling. Dynamic range comming out of the player is now greater than any home system is capable of reprodicing, around 130 DB! Mark @ GTS  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 03-13-2002 09:09 PM                        Bobby Henderson said: "This digital=perfect crap has to stop already. I think that marketing phenomenon is allowing the digital projection sales people and fanboys to be lazy and not forcing them to develop an actual superior product." Kodak believes in "Digital Done Right" and is developing "superior products" with a systems approach: http://www.kodak.com/US/en/motion/digital/reality.shtml http://www.kodak.com/US/en/motion/digital/system.shtml ------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Research Labs, Building 69, Room 7525A Rochester, New York, 14650-1922 USA Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243 E-Mail: john.pytlak@kodak.com Web site: http://www.kodak.com/go/motion  |  IP: Logged

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