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Dolby Surround Pro Logic II Decoder Principles of Operation
http://www.dolby.com/assets/pdf/tech_library/209_Dolby_Surround_Pro_Logic_I=
I_Decoder_Principles_of_Operation.pdf

Some threads on DPL math,
http://forum.doom9.org/showthread.php?s=3D&threadid=3D27936
http://forum.doom9.org/archive/index.php/t-57988.html


Note that a matrix decoder could also be used for DD5.1 EX or DTS ES
to extract the sixth channel (6.1)

--
Steve
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