Appendix B Audio Specifications AAC Audio
© 2015 Harmonic Inc. All rights reserved. 82 Electra 9200, Rev O
NOTE: MPEG-2 AAC/HE AAC uses the ADTS wrapper. MPEG-4 AAC/HE AAC/HE AAC v2 defaults to the
LATM/LOAS wrapper with a user option to select ADTS. Wrapper requirements are system specific.
NOTE: At HE AAC v2 bit rates higher than 64 kbps, the PS tool is automatically disabled, resulting in
an HE AAC or AAC audio bitstream. For HE AAC bit rates higher than 128 kbps, the encoder disables
the SBR tool, resulting in an AAC bitstream.
Table B–3: AAC Audio Bit Rates
Audio
Bit Rate
(Kbps)
Audio without PCR Audio with PCR
48 kHz 44.1 kHz 32 kHz 48 kHz 44.1 kHz 32 kHz
32 36.36 44.53 40.39 48.46 44.53 40.39
48 60.56 55.65 56.53 60.56 55.65 56.53
56 60.56 66.77 64.60 72.67 66.77 64.60
64 72.67 77.89 72.67 72.67 77.89 72.67
96 108.98 111.25 104.94 108.98 111.25 104.94
112 121.08 122.37 121.08 133.18 122.37 129.14
128 145.28 144.61 137.21 145.28 144.61 145.28
182 193.69 200.20 193.69 205.80 200.20 201.76
192 205.80 211.32 209.83 205.80 211.32 209.83
224 242.10 244.68 242.10 242.10 244.68 242.10
256 278.41 278.04 274.37 278.40 278.04 274.37
320 338.93 344.76 338.92 351.03 344.76 346.99
384 411.54 411.48 411.54 411.54 411.48 411.54
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