Sonifex Redbox RB-VHDDD8, Руководство пользователя

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Redbox RB-VHEDD8 & RB-VHDDD8 User Handbook
INTRODUCTION
INTRODUC
TION
1
RB-VHDDD8 – 3G/HD/SD-SDI Dolby E/Dolby Digital Decoder
Fig 1-2: RB-VHDDD8 Front Panel.
The RB-VHDDD8 is an SDI audio de-embedder and re-embedder with Dolby E & Dolby
Digital Decoding capabilities. It de-embeds and decodes a selected Dolby E or Dolby
Digital bitstream embedded in the video input. The outputs from the decoder and the
de-embedder can then be re-embedded onto either of the two SDI outputs and also
transmitted on a BNC or D-type situated on the rear panel. The encoded Dolby bitstream is
also available via a dedicated output on the rear panel.
It has a triple rate SDI receiver with automatic input rate detection and equalisation along
with two re-clocked and individually buffered SDI outputs. It supports the full range of 3G,
HD and SD standards from NTSC and PAL up to 1080p 60Hz.
The digital audio output connections are transformer-coupled balanced line interfaces
and can be configured to be either 75ohm (AES 3ID) or 110ohm (AES 3) output impedance
through either a BNC or via the D-type connector. These output connections are paralleled,
allowing one type to be used per output.
The metadata output from the decoder is transmitted using RS-485 via the external 9-pin
D-type on the rear panel and can also be embedded into the vertical blanking space
(SMPTE-2020) oof the two SDI outputs.
There is also remote I/O available from the rear panel through a 25 way female D-type
connector. These are fully configurable.
The unit is controlled locally through the front panel display but can also be remote
controlled via an Ethernet connection using the Sonifex SCi software.
There is independent level control for every channel, which can be adjusted from -24dB
through to +24dB in 0.5dB steps.
Embedding and De-Embedding Overview
Audio embedding is the process of taking one or more audio signals, formatting them into
packets and then placing them into the ancillary or blanking space of a video signal. Audio
de-embedding is the process of retrieving this audio data from the video signal but not
necessarily removing it. These two processes are standardised by two SMPTE documents,
SMPTE-272M for SD-SDI and SMPTE-299M for HD-SDI and 3G-SDI.