Ericsson AVP 3000 Series - How to Set up Phase Aligned Audio Encoding

Getting Started
3-40
EN/LZT 790 0023/1 R16A
Note: If an attempt is made to select a pre-compressed input format while the
module is configured to encode audio, an error message referring to no
more licenses… will be displayed, and the configuration cannot be applied.
When configured for audio Pass-thru, the user is provided with the ability to select
the bit rate or bit depth of the incoming stream. This helps ensure that there is not
an excessive bit rate allocated to the audio component when bit rate tracking is
enabled. 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 3.14 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-E 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
3.15 How to Set Up Phase Aligned Audio Encoding
About Phase Aligned Encoding
Note: “Phase Aligned Audio” is patented Ericsson functionality.
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
CE/SWO/PAA licenses are present (1 for single PAA, and 2 for dual PAA) combined
with additional CE/SWO/M1L2 licenses.
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.
Table 3.11 License Requirements for PAA Encoding
Number of additional licenses required
6 channel 8 channel Dual 6 channel Dual 8 channel
CE/SWO/M1L2 1 2 4 6
CE/SWO/PAA 1 1 2 2