Adtec EN-20, Руководство пользователя

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ENCODE (compress the audio)
or PASSTHRU (accept
compressed Dolby or PCM type
bitstream on SDI. It will be
time-aligned and multiplexed
into the transport stream. ) Encode
Passthru SEE AMO in
API
documentatio
n
Type If the mode is ENCODE, the type
can be set to Dolby Digital AC3
or MPEG 1 Layer 2. If the mode
is set to PASSTHRU, there is
support for Dolby E, Dolby
Digital AC3 and 5.1, PCM
(302M), and Linear Acoustic E2.
Dolby Digital is part of the ATSC
A53 spec. with a stream type of
0x81 and required for ATSC
applications. DD 0x81
MU 0x03
DE
LP
DD 0x06
MU 0x04 *. ECMD# AMO
SEE AMO in API
documentation
Rate Mpeg1Layer2 32-384 kbit/s
AC3 Encode 56 - 640 kbit/s
PASSTHRU - Auto-Detects
32 - 640 kbit/s *.ECMD# AMO
SEE AMO in API
documentation
Level Audio Level can be set in
one-decibel increments, with a
range of -18 to +8 decibels.
Available only in Encode Mode.
-18 - +8 dB *.ECMD# ALV
Sync Audio Sync set the audio sync
offset. The valid range is +/-
800 milliseconds. Non functional
for Musicam Encode
+/- 800 ms *.ECMD# AUS
Musicam Mode Mpeg1Layer2 (Musicam) codec
configuration
STEREO
MONO
DUALMONO
*.ECMD# MCM
The same menu options are available for both Channel 1 and Channel 2
Note:
​
If using API Commands, you must specify which encoder the command applies to by
substituting '0' (for Encoder 1) or '1' (for Encoder 2) in place of the '#' symbol in the
commands above. For more information, see the "API Commands" article in this manual.
PIDs Menu
The following diagram illustrates the structure and flow of the
​
PIDs Menu
​
on the Adtec
EN-20 device:
Control Function Options API Command
PMT PID Configures PID marked for Hex value 0x0020 - *.ECMD# PPI