Ericsson AVP 4000, Справочное руководство, Страница: 107 / 422

Getting Started
1/1553-FGC 101 1790 Uen Y 3-71
When configured for audio pass-thru, you are also able to select the bit rate or bit
depth of the incoming stream. However, there is no monitoring to ensure that the
input matches the configured value and, if the configured value is set lower than the
actual incoming bit rate, the output transport stream can be over-rated causing
problems with the output.
Table 3.10 Audio Pass-thru Bit Rate Configuration
Audio Input Configurable Options
LPCM Pass-thru * Bit Depth 16 bit (1960 kbps)
20 bit (2340 kbps)
24 bit (2728 kbps)
Dolby Digital Pass-thru Bit Rate Range 96 kbps to 640 kbps
Dolby Digital Plus Pass-thru Bit Rate Range 96 kbps to 640 kbps
* Supported from the embedded SDI input encode mode only. Not supported with IP input on EI9001T.
3.7.28 How to Set Up Input for 3/2L (5.1 Surround) Encoding
Overview
The unit can only de-embed stereo channel pairs (groups) from the SDI/HD-SDI
input signal. Therefore, to set up 5.1 encoding, three groups have to be de-
embedded from the SDI/HD-SDI input signal, and routed to the audio encoder.
The embedded groups have to be consecutive. That is, they have to carry the
different channels as detailed in Table 3.11 (SMPTE 320M).
Table 3.11 Embedded Stereo Channel Pairs
Group Description
Embedded n Left Front, Right Front
Embedded n+1 Center, LFE
Embedded n+2 Left Rear, Right Rear
Configuration
Note: This procedure assumes that a service has already been created. If not, one
must be created before continuing.
1. In the Inputs widget, select Audio Stream 1 .
2. Drag the selected component to a service in the
Outputs
widget.
3. In the Outputs widget, click on the audio component.
Note: If you click on the Audio component in the Outputs widget, the
corresponding audio stream will be highlighted in grey in the Inputs widget.
4. In the Properties widget, click on the Input tab.
5. Set the Input Format to Uncompressed (LPCM)