PLC (Packet Loss Concealment)

PLC，丢包隐藏，也叫丢包补偿机制，它是媒体引擎用来解决网络丢包问题的。当媒体引擎在接收一系列媒体流数据包时，并不能保证所有的包都被接收到。如果有数据包丢失，且此时FEC机制又没有使用，PLC机制就会起作用。PLC并不是标准一致，它允许媒体引擎和编解码器根据自身情况加以实现和扩展。

Packet Loss Concealment is a set of heuristics employed by a Media Engine to overcome packet loss problems. When a stream of packets is received by the media engine, it is not guaranteed that everything sent gets received. In case not all packets are received, and no FEC is employed (or is usable), packet loss concealment comes into play. Packet loss concealment isn’t standardized anywhere and is left for the implementer of the media engine and codec.

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原文链接：liuzhen.blog.csdn.net/article/details/80342211