5 Guidelines for Tuning Echo Cancellation Performance

This section introduces a guideline to fine-tune the EC performance. There are usually three requirements for the EC tuning. They are: high MIC volume, echo-free and double-talk performance. These three requirements are different from each other. For example, if there is a need for high volume at MIC path, the echo amplifies. Therefore, tuning of the parameters is required to make echo inaudible, which results in poor double-talk performance. The following figure illustrates the first five steps that basically handle the whole speaker phone/car kit echo issues.