Harmonic Electra9200 Installation Manual page 39

Chapter 4 Electra 9200 Specifications
Table 4–6: On-board Audio Features continued
Audio Feature
MPEG HE AAC
compression
MPEG AAC
compression
a. These rates are not compliant with A/53.
b. These rates are valid for 1.0 coding only.
c. Above 56 kbps (1.0), 112 kbps 2.0), or 192 kbps (5.1) the system automatically configures compressions for AAC-LC
even if HE AAC is selected.
Note the following limitations:
ATSC Standard A/53 specifies that only 48 kHz sampling may be used, and that ES bit
n
rates must be less than or equal to 384 Kbps for a complete service. It also specifies that
a two-channel dialog-only service must be less than or equal to 192 Kbps. Total ES rates
for all services must be less than or equal to 51 2 Kbps.
Embedded audio must be 48 kHz sampling and synchronous with the video. See SMPTE
n
272M for definitions.
MPEG AAC and HE AAC can be placed into the output Transport Stream encapsulated in
either of two methods
ADTS
n
ADTS is an acronym for "Audio Data Transport Stream. " This is the default used if the user
selects MPEG-2 AAC/HE AAC. ADTS is assigned a stream type of 0x0F.
LATM/LOAS
n
LATM is an acronym for "Low Overhead Audio Transport Multiplex. " LOAS is an acronym
for "Low Overhead Audio Stream," and furnishes an outer wrapper for LATM's inner
wrapper of the raw audio Elementary Stream syntax. MPEG-4 AAC and HE AAC
bitstreams are encapsulated as LATM/LOAS and assigned a stream type value of 0x1 1.
© 2015 Harmonic Inc. All rights reserved.
Coding Mode
Single channel (1/0)
n
Dual channel (1+1)
n
Stereo channel (2/0)
n
Joint stereo channel
n
Multi-channel (5.1)
n
Single channel (1/0)
n
Dual channel (1+1)
n
Stereo channel (2/0)
n
Joint stereo channel
n
Multi-channel (5.1)
n
32
Audio Encoder Features
Sampling ES Bit Rates Supported
Frequency (Kbps)
32 kHz
32, 48, 56, 64
44.1 kHz
c c
1 1 2 , 1 28
48 kHz
32 kHz 32, 48, 56, 64, 96,
44.1 kHz
c c
1 1 2 ,1 28 , 1 44
48 kHz
c
192 ,224
c
384
32 kHz
96, 1 1 2, 1 28, 160, 192
44.1 kHz
48 kHz
32 kHz 32, 48, 56, 64, 96, 1 1 2,
44.1 kHz 1 28, 182, 192
48 kHz
32 kHz 64, 96, 1 1 2, 1 28, 182,
44.1 kHz 192, 224, 256, 320,
48 kHz 384
32 kHz 224, 256, 288, 320,
44.1 kHz 352, 384, 448, 51 2,
48 kHz 576, 640
c c
, 96 ,
c c
, 160 , 192
d c
, 160 ,
c c c
, 256 , 320 ,
c
Electra 9200, Rev O