Question: In a video telephone setup using a separate microphone and speaker (without a handset or headset), what additional audio processing technique is typically necessitated to maintain call quality?
Option 1: Audio Compression (AC) to reduce bandwidth usage
Option 2: Acoustic Echo Cancellation (AEC) to mitigate feedback
Option 3: Noise Reduction (NR) for ambient sound minimization
Option 4: Speech Enhancement (SE) for clearer voice transmission
Explanation: When a video telephone uses separate microphone and speaker components, without the acoustic isolation provided by a handset or headset, there's a higher likelihood of the speaker's output being captured by the microphone, causing echo. Acoustic Echo Cancellation (AEC) is specifically designed to address this issue by subtracting the echoed signal from the microphone input, thus maintaining call quality and preventing feedback loops.