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Author
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Topic: DTS ES doubt
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Miguel Angel Martorell
Film Handler
Posts: 81
From: Valencia, Spain
Registered: Jan 2002
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posted 07-18-2002 07:04 PM
I didn´t worked with DTS ES (I love to...) but I have a question. The DD EX is 5.1 and the surround center channel is produced by the LS and RS channels ¿O.K.?.Now I have just read that DTS ES allows the chance of 6.1 discrete channels. The discs recorded on DTS ES that I have in my thetare are both compatible 5.1 matrix and 6.1 discrete or just 5.1 with matriced LS and RS. Sorry for my english but I´m a little hurry
Un saludo
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Bobby Henderson
"Ask me about Trajan."
![](/ubbmembers/840f.jpg)
Posts: 10973
From: Lawton, OK, USA
Registered: Apr 2001
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posted 07-19-2002 06:32 PM
70mm DTS has no audio backup on the print. You just have film image and time code. The time code on the 70mm print is larger than the morse code like dots and dashes on 35mm. If the DTS hardware (reader and processor) is in proper working order then it is basically impossible for any misreads to occur.However, DTS recommends that any 70mm DTS setup feature a backup DTS unit in case of a hardware failure, such as a disc drive going bad or something like that. CCDs imagers are improving all the time. They are far above the levels of sophistication in 1990 when Cinema Digital Sound started the whole paradigm shift to 5.1 digital. However, the CCDs are still not good enough to handle Dolby Digital and SDDS tracks without the SR backup track. DTS can ignore up to 48 frames of bad data but the most SDDS and DD can miss is 4 frames. Even with a supercharged new reader sporting the latest CCDs a bad splice or damaged section may still trip out the system to analog. With the current DTS, DD and SDDS formats, SR backup is going to remain a standard item. Perhaps if/when advances are made to move film sound formats into another generation of development we may see new "dual systems" with robust enough time code that the SR backup track isn't needed. And for 35mm film, that could introduce some improvement in image quality by having the film image completely fill in the area between the perfs just like 70mm.
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