Error concealment

In signal processing, error concealment is a technique in which an error in a transmitted or encoded signal is replaced by content interpolated from other parts of the signal, in an attempt to produce a more pleasant experience for the viewer or listener, at the cost of concealing the presence of the error in the original content.

Error concealment was commonly used in the analog videotape era to hide "dropouts" by repeating earlier video lines over short periods of signal loss. The device used to perform this function was called a "dropout compensator".^[1]

Error concealment is also used in modern compressed digital video systems.^[2]^[3]

References

^ W.K.E. Geddes (14 December 1964). "R&D Report 1964-77 : Simple drop-out compensator for video tape recorders". Retrieved 2013-03-21.
^ "Video Signal Error Concealment". NIST. March 29, 2011. Retrieved 2013-03-21.
^ Nimrod Peleg (January 2003). "Error Resilience and Concealment in Video Coding With focus on H.261/3" (PDF). Retrieved 2013-03-21.

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[1] W.K.E. Geddes (14 December 1964). "R&D Report 1964-77 : Simple drop-out compensator for video tape recorders". Retrieved 2013-03-21.

[2] "Video Signal Error Concealment". NIST. March 29, 2011. Retrieved 2013-03-21.

[3] Nimrod Peleg (January 2003). "Error Resilience and Concealment in Video Coding With focus on H.261/3" (PDF). Retrieved 2013-03-21.

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