TANDBERG E5500, Инструкция по эксплуатации

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Equipment Description
Instruction Manual: evolution 5000 E5500 Mobile Contribution Encoder Page 4-9
ST.TM.E10033.3
Module Position Diagram
Figure 4.3: Module Positions
Video Encoding Functions
The PAL/NTSC composite video and YP
r
P
b
component video signals are
input to the S8481 Video Input Module where one input is selected,
converted to parallel 656 video, and fed to the Video Switch on the S8475
Base Board 3ASI (Motherboard). The unit also offers an SDI input, which is
de-serialised and fed into the same video switch.
One video feed is selected by the Switch and fed to the Preprocessor stage
which carries out functions such as down-sampling, frame resynchronising,
noise reduction, embedded audio extraction, Teletext/VBI extraction and
forward analysis (look ahead to detect scene cuts etc.). The Preprocessor
also contains a test pattern generator.
The output of the preprocessing block is still parallel TTL 656 and this is
passed to the Video Compression Module (S8652). The Video Compression
Module performs the MPEG compression process and its output is a stream
of MPEG video transport packets at the desired video bit-rate.
Audio Encoding Functions
Audio is handled on the Base Board 3ASI (Motherboard) where it is input
as either analogue or digital AES/EBU, or de-embedded audio from a
digital video input. The selected input generates audio samples suitable for
compression. Audio compression is performed by a Digital Signal Processor
(DSP) which converts the audio samples to the MPEG-1 (layer 2), Dolby
Digital, or pre-encoded AC-3.
Data Handling Functions
The RS-422 and RS-232 data feeds are input to the S8477 Data Input
Module. The data inputs are converted directly to packet streams – they
are not compressed.
S8475
BASE BOARD 3ASI
(MOTHERBOARD)
S8652
VIDEO COMPRESSION
MODULE
S8477
DATA INPUT MODULE
S8481
VIDEO INPUT MODULE
OPTION SLOT 4
(Blank Module)
S10949
QPSK MODULATOR MODULE