Question: In calculating Corruption Duration (M) for video streaming, if a frame references previously decoded corrupted frames but all referenced pixels were correctly reconstructed, how is this frame classified according to the error tracking method and the strict definition provided?
Option 1: Always as a corrupted frame by both error tracking method and the strict definition.
Option 2: As a good frame by the error tracking method but not by the strict definition; it's considered corrupted.
Option 3: As a corrupted frame by the error tracking method but can be considered good under the strict definition if all bits are received without error.
Option 4: As a good frame by the error tracking method, and this classification aligns with the strict definition if no bit errors occurred during its reception.
Explanation: According to the provided definitions, an error tracking method may derive a frame as 'good' even if it references previously decoded corrupted frames, provided all referenced pixels for generating the prediction signal were correctly reconstructed. This aligns with the strict definition of a 'good frame' in scenarios where no bit errors occurred during the frame's reception.