�1����
Scope�
�2���� References�
�3���� Terms and definitions�������
�4���� Acoustic echo
processing�
������� 4.1���� Analogue components��������
������� 4.2���� Functional units of an acoustic echo controller���������
������� 4.3���� Interaction between terminal echo
control and signal processing network equipment
������� 4.4���� Delay�����
������� 4.5���� Acoustic echo control
specifications�����������
�5����
Noise reduction
������� 5.1���� Analogue components��������
������� 5.2���� Functional units of a noise reduction system
���� ���5.3���� Interaction between terminal noise reduction
and signal processing network equipment����
������� 5.4���� Noise reduction processing delay���
������� 5.5���� Noise reduction system
specifications����