Ericsson AVP 4000, Справочное руководство, Страница: 110 / 422

Getting Started
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6. Select the Encode tab as shown in
Figure 3.68
.
7. Configure the output format of the transcoded audio as required. the example
below, HE-AAC is selected from the Coding Standard drop-down menu.
Figure 3.68 Audio Component > Encode
3.7.30 How to Set Up Phase Aligned Audio
3.7.30.1 About Phase Aligned Audio
Phase Aligned Audio (PAA) is a proprietary feature of Ericsson Television
Contribution Encoders that uses multiple MPEG-1 Layer II encoders operating at
384 kbps to carry each channel pair in the group of phase aligned audio channels.
Phase aligned encoding is supported only if the appropriate number of
AVP/SWO/PAA licenses are present (1 for single PAA, and 2 for dual PAA)
combined with additional AVP/SWO/M1L2 licenses. The minimum required licensing
is shown in
Table 3.12
.
PAA is available on SDI inputs as long as the upstream embedder provides DIDs on
the same video line and in a fixed sequence. It is only guaranteed to be aligned if
the audio channel status blocks are aligned at the input of the encoder. PAA is not
available on IP inputs.
Table 3.12 License Requirements for PAA Encoding
Number of additional Licenses required
6 Channel 8 Channel Dual 6 Channel Dual 8 Channel
AVP/SWO/M1L2 1 2 4 6
AVP/SWO/PAA 1 1 2 2
When configured in MPEG-1 Layer II 6 or 8 Channel Aligned Encoding, each pairing
is identified by the use of ISO_639_language descriptors. The languages are
encoded using two language codes per component as follows:
•
First instance on Audio Module 1:
- aaa, aab for first dual mono
- aac, aad for second dual mono
- aae, aaf for third dual mono