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
