sensitive t iming, D olby E e ncoders m ust h ave a r eference p hase l ocked t o t he v ideo. I n
other w ords, t he S DI v ideo t iming f eeding t he e ncoder m ust m atch t he s ame c omposite
reference t iming t hat i s c onnected t o t he D olby E e ncoder. A s imple b lack b urst g enerator
that d oes n ot s hare t he s ame S DI v ideo t iming w ill n ot w ork t o s ource a D olby E e ncoder.
A c omposite v ideo r eference t hat s hares t he s ame t iming a s t he v ideo s ource s hould b e
used. T ypically, S DI v ideo s hould b e r un t hrough a f rame s ynchronizer t hat i s u tilizing t he
same r eference a s t he D E e ncoder.
The A dtec e ncoder p reserves a udio a nd v ideo t iming a s i t i s p resented. I f t he a udio t iming
does n ot m atch v ideo t iming a t t he i nputs, t here w ill b e p otential l ine p lacement e rrors
and/or C RC e rrors s een o n a d ecoder.
No D etection o f D olby E / D olby D igital, F ront P anel s hows " DE - --", " DP - --", " LP - --":
The e ncoder w ill a utomatically d etect t he b it d epth o f D olby E ( 1 6 / 2 0 b it ) a nd t he b itrate
of D olby E / D olby D igital. I f D olby E i s s elected a nd D olby D igital i s p resented, t he e ncoder
will c hange a utomatically a nd v ice v ersa. I f D olby D igital i s s elected a nd D olby E i s
presented, t he e ncoder w ill c hange t he c onfiguration a utomatically. I f t he f ront p anel s hows
dashes f or t he d etected b itrate ' ---', D olby i s n ot b eing d etected. T his i s m ost c ommonly
due t o a m is-configured S DI A udio M atrix o r D olby n ot b eing p resent o n t he s pecified i nput
pair.
Look a t t he S DI s ignal o n a n S DI a nalyzer t o v erify t hat D olby i s p resent o n t he p air
intended. I f a n S DI a nalyzer i s n ot a vailable, o ne t roubleshooting t ip i s t o s et t he m ode t o
ENCODE. I f s ilence o r r egular a udio i s h eard o n t he d ecoder, a c ompressed b itstream i s
not b eing p resented o n t he c orresponding i nput. T he S DI m atrix c an b e c hanged t o e ach
pair w ithout r estarting t he e ncode s ession. O nce h ash i s h eard, t hen a c ompressed
bitstream s hould b e p resent. S et t he m ode b ack t o P assthru f or t he a utomatic d etection
mechanism t o c onfigure t he D olby t ype a nd b itrate.
Note : W hen a n a udio i nput / c hannel i s c onfigured f or P ass t hrough o peration I nternal t one
generation d oes n ot f unction f or t he p ass t hrough c hannels.