Question: In the context of QoE-Feedback for Transparent end-to-end Packet-switched Streaming Service (PSS), how is the expected playback time of a frame calculated for determining Jitter?
Option 1: Actual playback time of the last played frame plus the difference between the NPT times of the current and last frames.
Option 2: Absolute difference between the NPT time of the current frame and the start of the measurement period.
Option 3: Average playback time of all previously played frames plus the NPT time of the current frame.
Option 4: Fixed interval (e.g., 100 milliseconds) added to the actual playback time of the last played frame.
Explanation: This is correct because, according to specifications for determining Jitter in PSS, the expected playback time of a frame is calculated by adding the difference between the Normal Play Time (NPT) of the current frame and the NPT of the last played frame to the actual playback time of the last played frame. This method accurately reflects how jitter is assessed in relation to expected versus actual playback timing.