Thompson ViBE EM4000, Руководство пользователя

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Appendix A ’Technical Specifications’ — Options
190 ViBE EM4000 — Release 1.10
User Manual — 46073586AB02
Dolby
®
E decoding
Ordering reference NEMS4DDEAA
This option enables the Dolby
®
E decoding capability for one Dolby
®
E
stream.
Up to 4 Dolby
®
E decoding options can be installed per chassis
NEM40IN2AA.
Up to 8 Dolby
®
E decoding options can be installed per chassis
NEM40IN4AA.
The Dolby
®
E stream is de-embedded from the HD SDI stream. The
Dolby
®
E stream can theoretically contain up to 8 programs, each
program being either surround, stereo or mono. The total number of
channels (mono) in the stream is 8 max. One out of four programs can
be decoded via one Dolby E decoder option.
After decoding, the programs can be encoded in Dolby
®
Digital (AC3) or
Dolby
®
Digital Plus (E-AC3).
Metadata are extracted from the Dolby
®
E stream and can be sent with
the encoded Dolby stream.
Dolby E monitoring
A Dolby E monitoring-specific indication is provide. An area integrated in
the Web Interface analyzes the Dolby E stream deembedded from the HD
SDI and indicates the type of stream found according to the program
number.
Dolby E
®
to PCM auto switch mode - Dolby Dual configuration
In Dolby Dual configuration mode, switching on 2 different
groups/channels from Dolby
®
E to PCM and vice versa is supported.
The switch from Dolby
®
E to PCM and back is almost seamless (silence
insertion <200 ms).
This switch mode can be set ON/OFF by the User.
When automatic switching mode is ON, the Encoder switches to the
default bitrate (when PCM 2.0 is detected instead of Dolby
®
E) and
signals a stereo stream (rather than a surround stream). The default
bitrate mode cannot be set by the User.