CDB6422 Просмотр технического описания (PDF) - Cirrus Logic

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CDB6422

Enhanced Full-Duplex Speakerphone IC

Cirrus Logic 

CS6422

3.8.6 AECD - ACOUSTIC ECHO CANCELLER DISABLE

Setting this bit to a ‘1’ disables the Acoustic Echo Canceller. The AEC is removed from the signal

path and is not considered in the half/full-duplex decision making process.

3.8.7 NECD - NETWORK ECHO CANCELLER DISABLE

Setting this bit to a ‘1’ disables the Network Echo Canceller. The NEC is removed from the signal

path and is not considered in the half/full-duplex decision making process.

3.8.8 ASDT - ACOUSTIC SIDETONE LEVEL

This control allows the introduction of a linear coupling path for the AEC to train on. The real acoustic

path is superimposed on this path and both are cancelled by the AEC.

The use of an acoustic sidetone is beneficial in environments where the real acoustic path may be

highly variable, faint, or distorted, such as in hands-free automotive applications. This control is usu-

ally set to ‘none’.

3.8.9 NSDT - NETWORK SIDETONE LEVEL

This control allows the introduction of a linear coupling path for the NEC to train on. The real network

path is superimposed on this path and both are cancelled by the NEC.

The use of a network sidetone is beneficial in environments where the real network path is faint or

distorted. This control is usually set to ‘none’.

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DS295F1

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