Thompson ViBE EM4000, Руководство пользователя

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Appendix A ’Technical Specifications’ — Features
176 ViBE EM4000 — Release 1.10
User Manual — 46073586AB02
„ "Setup tone": 2 kHz for the right channel and 1 kHz for the left channel,
24 bits @-15 dBFS. This test signal is used for system setup. As the left
and right channels have different frequencies they are easy to identify.
The audio level is approximately the same as the average level of a
standard audio signal and this therefore prevents the unwanted
change in audio level when switching between the audio input and the
test signal.
Audio capabilities
For the ViBE EM4000 Encoder the audio capabilities are:
Encoding
„ NEM40IN2AA: The Encoder features 12 audio encoders (12 x AUD).
„ NEM40IN4AA: The Encoder features 24 audio encoders (24 x AUD).
Each Audio encoder can encode audio in the following formats:
- MPEG-1 Layer II*
- Dolby
®
Digital (AC3) 2.0*
- Dolby
®
Digital (AC3) 5.1*
- Dolby
®
Digital Plus (E-AC3) 2.0*
- Dolby
®
Digital Plus (E-AC3) 5.1*
- Dolby
®
Digital (AC3) transport
- Dolby
®
Digital Plus (E-AC3) transport
- AAC-LC 2.0*
- HE-AAC 2.0*
- HE-AAC v2 2.0*
- AAC-LC 5.1*
- HE-AAC 5.1*
* Software options
Decoding
„ NEM40IN2AA: The Encoder features 4 Dolby
®
E decoders. Up to 4
Dolby
®
E streams can be decoded and encoded in Dolby
®
Digital
format (software options).
„ NEM40IN4AA: The Encoder features 8 Dolby
®
E decoders. Up to 8
Dolby
®
E streams can be decoded and encoded in Dolby
®
Digital
format (software options).