XM-014232-PC
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Figure 4-17 Audio pipeline configuration, [ALT_ARCH=1] when reference signal is absent
The following table summarises the audio characteristics for standard and alternative architectures.
Table 4-20 Alternative pipeline mode characteristics
PIPELINE
CONFIGURATION
FAR-END AUDIO (AEC REF)
STATUS
PIPELINE
FUNCTIONALITY
AEC
CHARACTERISTICS
ALT_ARCH = 0
With and without Far-end audio present
IC enabled
AEC enabled
Max echo delay = 150mS
ALT_ARCH = 1
No far-end audio
IC enabled
AEC disabled
No cancellation
ALT_ARCH = 1
Far-end audio present
IC disabled
AEC enabled
Max echo delay = 225mS
The following table describes the configuration parameters for the Alternative Architecture.
Table 4-21 Alternative pipeline mode commands
COMMAND
TYPE VALUE
DESCRIPTION
SET_ALT_ARCH_ENABLED
GET_ALT_ARCH_ENABLED
uint32 [0,1]
Enable or disable alternate architecture (Alt arch). When alt arch is
enabled, the system works in either AEC mode (when far end signal
is detected) or IC mode (when far end signal is not detected). When
in AEC mode in Alt arch, AEC processing happens on only one Mic
channel with 15 phases per mic-ref AEC filter.
0 - Alt arch is disabled.
1 - Alt arch is enabled (default)
