短语词组短語delay and jitter 時延和抖動delay -jitter 延遲抖動transfer delay jitter 傳送延時抖動delay jitter control 延遲抖動控制TDJ Transfer Delay Jitter 傳送延時抖動delay and delay jitter 延時與延時抖動jitter of delay time 延遲時間分散度 返回 delay jitter