25
M&E
The bitstream is the main audio service for the
program, minus a dialogue channel. The dialogue
channel, if any, is intended to be carried by an
associated dialogue service. Different dialogue
services can be associated with a single ME service to
support multiple channels.
Visual
This is typically a single channel program intended to
provide a narrative description of the picture content
to be decoded along with the main audio service. The
visual service may also be a complete mix of all
program channels, comprising up to six channels.
Hearing
This is typically a single channel program intended to
convey audio that has been processed for increased
intelligibility and decode along with the main audio
service. The Hearing service may also be a complete
mix of all program channels.
Dialogue
This is typically a single program intended to provide
a dialogue channel for a Main service. If the main
service contains more than two channels, the dialogue
is limited to only one channel. If the ME service is
two channels, the Dialogue can be a stereo pair: the
appreciate channels of each service are mixed tighter
( requires special decoders)
Commentary
This is typically a single channel program intended to
convey additional commentary that can be optionally
decoded along with the main audio service. This
service differs from dialogue services because it
contains an optional, rather than required, dialogue
channel. The service may also be complete mix of all
program channels, comprising up to six channels.
Emergency
This is a single channel service that is given priority
in reproduction. When the E-service appears in the
bitstream, it is given priority in the decoder and the
main service is muted.
VO_Karaoke
This is a single channel service intended to be
decoded and mixed to the center channel. (
requires special decoders)
Ext_meta
Use the Bitstream metadata settings from an external
program. Only usable when the
MD_enc1
till
MD_enc4
are set to
MxA
till
MxH
)
#Line
Line sets the Dynamic range metadata of presets.
NONE, no dynamic range compression is applied unless downmixing
could cause overload, in which case protection dynamic range is
automatically applied.
Film stnd, Applies more compression to a subjectively loud film that
requires dynamic range restriction.
Film Light, Applies light compression to a subjectively quiet film that
does not require dynamic range restriction.
Summary of Contents for DDP84
Page 34: ...34 9 Block Schematic...
