Thompson ViBE EM4000, User Manual

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Appendix A ’Technical Specifications’ — Options
ViBE EM4000 — Release 1.10 191
User Manual — 46073586AB02
The bitrates used are:
If another Main bitrate is proposed by the User and auto switch mode is
ON, the bitrate will remain the same for both the stereo and surround
streams and the signaling will remain of Surround type (in fact, in this
case silence is inserted on Ls, Rs, Center and LFE channels).
When auto switch mode is OFF and the Dolby
®
E stream disappears, the
last valid Dolby
®
E frame will be repeated 3 times and if it is still not
resynchronized, the encoder will be muted (encoding of silence at the
same bitrate).
Dolby
®
E 5.1 to Dolby
®
E 2.0 auto switch mode - Dolby Dual configuration
The Encoder can monitor the Dolby
®
E input and encode in the 5.1 or 2.0
program. 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 2.0 is detected in the Dolby
®
E stream instead of
5.1) and signals a stereo stream (rather than a surround stream). The
default bitrate mode cannot be set by the User.
The bitrates used are:
Table A-25. Bitrates in Dolby Dual configuration mode - Dolby
®
E to PCM 2.0 switching
Output Standard
selected
Dolby
®
E detected,
Rate set by the User
(kbit/s)
PCM 2.0 detected,
Fixed default bitrate
(kbit/s)
Dolby
®
Digital (AC3) 384 192
448 256
Dolby
®
Digital Plus
(E-AC3)
192 96
256 128
Table A-26. Bitrates in Dolby Dual configuration mode - Dolby
®
E 5.1 to Dolby
®
E 2.0
switching
Output Standard
selected
Dolby
®
E 5.1
detected,
Rate set by the User
(kbit/s)
Dolby E
®
2.0
detected,
Fixed default bitrate
(kbit/s)
Dolby
®
Digital (AC3) 384 192
448 256
Dolby
®
Digital Plus
(E-AC3)
192 96
256 128