Question: In the Energy-based Pause Detection for EVS (Enhanced Voice Services) codec, what happens to the frame counter when the detector transitions from an inactive state to an active state upon detecting active content?
Option 1: The counter continues incrementing, tracking the duration of the active content.
Option 2: The counter is set and kept at a value of 0, indicating the start of an active period.
Option 3: The counter is reset to a predefined non-zero value, signaling the detector's state change.
Option 4: The counter decrements until it reaches 0, confirming the end of the pause.
Explanation: When the energy-based pause detector in the EVS codec identifies active content, it transitions from an inactive to an active state. This transition involves resetting the frame counter to a specific value to mark the beginning of the active period accurately. Given the context, setting and keeping the counter at 0 upon detecting active content logically signifies the initiation of a new active period, allowing for accurate tracking of the active state's duration.