How is SVC better than existing error correction schemes such as IPLR or Polycom’s LPR?
The quality of video streams using standard video codecs such as H.264 without any error correction schemes typically degrade dramatically when there is as little as 1% packet loss. Current error protection schemes such as IPLR or Polycom’s LPR can help protect the quality of the video steam up to approximately 5% packet loss. However these schemes use error resilience techniques that can be categorized into two main groups: protective coding and correction codes. In protective coding the encoder (using standard H.264) does not exploit all the redundancy in the stream for compression resulting in much more resilience to packet loss but much less efficiency in compression which degrades quality. Using correction codes (e.g. Forward Error Correction) the encoder can protect the stream without degrading the quality but it dramatically increases required bandwidth and/or latency. Exploiting the layered structure of SVC, RADVISION is able to protect the stream without adding substantial amo
