Technical Specification
B.3.12.4 Advanced Audio Encoding
The VCMs support the following coding modes for AAC encoding:
• Stereo 2/0 (left, right)
The following table gives the coding modes and bit rates for AAC encoding.
Table B.24 Advanced Audio Encoding Specification
Bit Rate (kbps) AAC-LC
Stereo (2/0)
AAC-LC
Multi-Channel
Stereo (3/2L)
HE-AAC
Stereo (2/0)
HE-AACv2 HE-AAC
Multi-Channel
Stereo (3/2L)
32 YES
48 YES
56 YES
64 YES YES
80 YES YES
96 YES YES
112 YES
128 YES YES YES
160 YES YES YES
192 YES YES YES
224 YES YES
256 YES YES
320 YES
384 YES
448 YES
512 YES
B.3.12.5 Pass-thru Modes
Clocking
For the best performance when passing through compressed audio the video and
audio coming into the unit must be locked together, and the system clock locked to
Video or Ext SYNC. When set to Ext SYNC, the audio and video must also be
locked to this source.
Dolby Digital
The audio module can pass through pre-encoded Dolby Digital audio (up to 5.1).
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