![]() The analogue soundtrack provides a fall-back option in case of damage to the data area or failure of the digital decoding it also provides compatibility with projectors not equipped with digital soundheads. All film prints with Dolby Digital data also have Dolby Stereo analogue soundtracks using Dolby SR noise reduction and such prints are known as Dolby SR-D prints. The data is then decoded into a 5.1 channel audio source. A charge-coupled device (CCD) scanner in the image projector picks up a scanned video image of this area, and a processor correlates the image area and extracts the digital data as an AC-3 bitstream. A constant bit rate of 320 kbit/s is used. Dolby Digital cinema soundtracks are optically recorded on a 35 mm release print using sequential data blocks placed between every perforation hole on the sound track side of the film. Please see the relevant discussion on the talk page.īatman Returns was the first film to use Dolby Digital technology when it premiered in theaters in the summer of 1992. You can help the The JH Movie Collection's Official Wiki Wiki by citing appropriate references. This section seems 14 be biased or has no references. 5 Dolby technologies in packaged media formats.
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