EVS Synapse GED100, Руководство пользователя

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Bitstream Description
Complete
CM flags the bitstream as the Main Audio service for the program and all elements
are present to form a complete audio program. Currently, this is the most common
setting. The service may contain one (mono) to six (5.1) channels.
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.
#Ch_Mode This parameter instructs the encoder which inputs to use for this particular
program: it tells the decoder what channels are present in this program so the
decoder can deliver the audio to the correct speakers.
The setting is described as X/Y, where X is the number of front channels (left,
Center, Right) and Y the number of rear (surround) channels.
32 | November 2021 | Issue 1.00.B