Although this idea is simple, because of the extra time required to send multiple signals, this technique is incapable of supporting real-time applications.
[7] Depending on the method of transmission (analog or digital), there are a variety of ways for errors to propagate in the message.
Since its invention in the 1950s, the magnetic coating used in analog video tape has experienced radio frequency (RF) signal drop-outs.
Some of the techniques that were used for resolving these issues are analogous to those used for concealing errors in modern compressed video signals.
Error concealment has many digital applications, including web browsing, video conferencing, Skype, and YouTube[2][8]