ITU-T P.330

This Recommendation applies to the generic transmission characteristics, performance and testing principles of Speech Processing Devices for Acoustic enhancement (SPDA) intended for use in terminals, whatever the applications. A Speech Processing Device for Acoustic enhancement is defined as any signal processing function integrated in terminals that performs voice enhancement. Voice enhancement functions include the control of acoustic echo and noise reduction. The purpose of this Recommendation is to define a framework for specifying performance constraints for terminals which include SPDA, and when appropriate, to define tests that may be performed on such terminals to verify that these constraints are met. This Recommendation covers generic characteristics that are applicable to both analogue and digital terminals.