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Equipment Description
Instruction Manual: evolution 5000 E5500 Mobile Contribution Encoder
Page 4-11
ST.TM.E10033.3
Table 4.1: PID Scrambling
PIDs Scrambled
PIDs NOT Scrambled
Packet Type
PID (Hex)
Packet Type
PID (Hex)
Video
0x0134
NULL
0x1FFF
Audio A
0x0100
PCR
0x1FFE
Audio B
0x0101
CA
0x00C0
RS-232 Data
0x0102
PAT
0x0000
RS-422 Data
0x0104
CAT
0x0001
Teletext
0x0111
PMT
0x0020
NIT
0x0010
SDT
0x0011
EIT
0x0012
TDT
0x0014
The output from the RAS Scrambling Module is fed to the Modulator. This
is as a synchronous parallel interface using a 204-byte packet format over
the Backplane to the internal Modulator Module.
4.7.7
Base Board 3ASI (Motherboard) S8475
Functions
The S8475 Base Board 3ASI (Motherboard) is responsible for all the
non-video compression functions of the MCE. It has the following main
functions.
Host Processor
The host is the main control processor in the MCE. It is a Motorola 68360
processor running at 33 MHz with external DRAM on SIM and flash for
storing code. It communicates with the outside world via an Ethernet, Host
Status port or the front panel and keypad. At power on, the host boots
from the flash, copying its code into DRAM to run. It can be reset if the
voltage is too low, or if the switch is pressed, or if it detects a bus error.
The host takes instructions from the rest of the world via its interfaces and
uses these to control the other elements of the unit. It passes instructions
to the other elements through its dual port RAM interfaces. Another task of
the host is to generate SI.
Video Switch
The video switch selects between the two possible sources of video; SDI,
or analogue video.
Preprocessor
The preprocessor operates on the 656 video stream selected by the video
switch. It carries out such functions as Teletext extraction, noise
reduction, filtering, VBI extraction, test pattern generation and forward
prediction (3/2 pull down detection etc.) and embedded audio extraction.
The output of the preprocessor is still 656 video ready for encoding, and
any extracted AES/EBU audio. The preprocessor communicates with the
host via a dual port RAM.