Method and apparatus for correcting errors in a transmitted vide

Details Method and apparatus for correcting errors in a transmitted vide Method and apparatus for correcting errors in a transmitted vide

1996-12-20

1998-05-12

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

348420, 348607, 348616, H04N 768

Patent

active

057513619

ABSTRACT:
An apparatus for use in a video signal decoding system for concealing errors in a video signal first detects a lost block in the video signal, the lost block having errors, and then provides pixel values of neighboring blocks for the lost block in the video signal based on information for the lost block. Subsequently, The apparatus computes edge gradients of neighboring pixels included in a predetermined range of pixels surrounding the lost block based on the pixel values of the neighboring blocks and determines a pixel interpolation direction based on the edge gradients of neighboring pixels. A spatially interpolated block is produced based on the pixel values of the neighboring blocks and the pixel interpolation direction and it is provided as a substitution block for compensating the lost block.

REFERENCES:
patent: 5142537 (1992-08-01), Kutner et al.
patent: 5146325 (1992-09-01), Ng
patent: 5212549 (1993-05-01), Ng
patent: 5247363 (1993-09-01), Sun
patent: 5267021 (1993-11-01), Ramchandran
patent: 5621467 (1997-04-01), Chien

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