Error concealment apparatus for video signal processors

Details Error concealment apparatus for video signal processors Error concealment apparatus for video signal processors

1993-01-14

1994-11-15

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

348616, 348617, G06K 940

Patent

active

053656040

ABSTRACT:
Error concealment apparatus for correcting errors in signals representing video images includes means for detecting image gradients in an area surrounding a lost block of image data. Circuitry responsive to these image gradients generates a plurality of blocks of directionally interpolated pixel values. The pixel values in the respective blocks of directionally interpolated pixel values are sorted according to amplitude, and then pixel values from mutually exclusive positions in the respective blocks are selected to form a block of pixel values for error concealment.

REFERENCES:
patent: 4741046 (1988-04-01), Matsunawa
patent: 4807033 (1989-02-01), Keesen et al.
patent: 4941186 (1990-07-01), Massmann et al.
patent: 5142537 (1992-08-01), Kutner et al.
patent: 5243428 (1993-09-01), Challapali et al.

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