| 摘要 |
A numeration indicator field and a synchronization point flag field are added to an SL-packet header, to increase error resilience of MPEG-4 System streams, as follows: 1. The numeration indicator of an access unit is incremented if and only if the access unit conveys a fundamental scene change; 2. The synchronization point flag of an access unit is set to 1 and the numeration indicator of the access unit is set equal to the numeration indicator of an exactly preceding access unit to indicate no change of scene.
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