4 Voice Processing Functions

The voice processing functions use the following features to enhance voice call quality by suppressing ambient noise, echo and other call interferences:

• High-Pass Filter (HPF) for SPK/MIC paths – Removes low-frequency board/background noise
• Noise Reduction (NR)
• Echo Cancellation (EC)/Echo Suppression (ES) – Linear/non-linear echo cancellations
• Comfort noise insertion for MIC paths – Insert comfort noise to maintain stable noise level
• 5-band EQs for SPK/MIC paths – Compensate frequency imperfection
• MIC and speaker gain controller