Dolby SR-D: Difference between revisions

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'''Dolby SR-D''', also called '''Dolby Digital''' is an optical digital format introduced in 1992. ~~"SR-D" refers to the fact that~~ all prints with Dolby Digital tracks ~~are~~ also ~~equipped with analog~~ [[Dolby SR|SR]] tracks.

'''Dolby SR-D''', also called '''Dolby Digital''' is an optical digital format introduced in 1992. Nearly all prints with Dolby Digital tracks also have [[Dolby SR|SR]] tracks.

SR-D is encoded with six discrete channels of digital sound: Left, Center, Right, Left Surround, Right Surround, and Subwoofer. SR-D EX offers a seventh, "Rear-Surround" channel which is matrix encoded into the Left and Right Surround channels.

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When inspecting an SR-D print, it is advisable to occasionally look at the SR-D soundtrack with a loupe for any thick base or emulsion scratches. If there is excessive wear on the SR-D track, you should keep a close eye on the track during playback and watch for dropouts. If the SR-D track is constantly failing (reading "F" on the processor) because the signal quality is too poor, the processor will revert to Dolby SR. The change in sound quality from SRD to SR is very apparent, so if the film is constantly switching between SRD and SR it is preferable to switch the sound format to SR and leave it in that format.

[[File:SRD_Misprint.jpeg |left|thumb|300px|An example of a misprinted SR-D track. An SR-D reader will not be able to read this!]]

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* Wikipedia: [[http://en.wikipedia.org/wiki/Dolby_Digital Dolby Digital]]

~~[[Category:Film components]]~~

[[Category:Sound formats]]

[[Category:Sound]]

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-'''Dolby SR-D''', also called '''Dolby Digital''' is an optical digital format introduced in 1992. "SR-D" refers to the fact that all prints with Dolby Digital tracks are also equipped with analog [[Dolby SR|SR]] tracks.
+'''Dolby SR-D''', also called '''Dolby Digital''' is an optical digital format introduced in 1992. Nearly all prints with Dolby Digital tracks also have [[Dolby SR|SR]] tracks.
 SR-D is encoded with six discrete channels of digital sound: Left, Center, Right, Left Surround, Right Surround, and Subwoofer. SR-D EX offers a seventh, "Rear-Surround" channel which is matrix encoded into the Left and Right Surround channels.
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 When inspecting an SR-D print, it is advisable to occasionally look at the SR-D soundtrack with a loupe for any thick base or emulsion scratches. If there is excessive wear on the SR-D track, you should keep a close eye on the track during playback and watch for dropouts. If the SR-D track is constantly failing (reading "F" on the processor)  because the signal quality is too poor, the processor will revert to Dolby SR.  The change in sound quality from SRD to SR is very apparent, so if the film is constantly switching between SRD and SR it is preferable to switch the sound format to SR and leave it in that format.
+[[File:SRD_Misprint.jpeg |left|thumb|300px|An example of a misprinted SR-D track. An SR-D reader will not be able to read this!]]
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 * Wikipedia: [[http://en.wikipedia.org/wiki/Dolby_Digital Dolby Digital]]
-[[Category:Film components]]
 [[Category:Sound formats]]
 [[Category:Sound]]