Our Method and Session Types

For the case of bi-directional sessions or multi-party sessions, our method can be used the same way as it is employed in unidirectional sessions. The only exception is that an extra parameter should be used to qualify the amount of echo in each side. (Knowing that the end-to-end delay effect is included in the echo estimation, thus, there is no need to add another parameter for the absolute delay effect.) Therefore, only the echo estimator's measure is needed as an extra quality-affecting parameter before completing the distorted databases and training the NN. It should be noted that the quality at both sides may not have the same value because the speech streams do not follow necessarily the same paths. Hence network parameters' values may have different values. In addition, the echo may differ from one side to the other due to the different round-trip time (RTT) from one source to the other.