Cross-Layer Error Detection for H.264 Video over UMTS
Olıvia Némethová, Wolfgang Karner, Ameen Al-Moghrabi, Markus Rupp · 2005
Abstract–Third generation of mobile communication systems brought new packet switched realtime video services. To detect errors in a video packet, parity bits are used at different layers of the protocol stack. If an error occurs, the whole UDP packet is usually discarded. Still, it can happen that the major part of such a packet might have been correct and the detailed information about correctness of the packet segments is known at lower layers. In this article an error detection mechanism using information from lower layers at the decoder is proposed and its benefits and implementation costs are analyzed. Key words: RLC CRC, streaming video, error resilience.