Method for rectifying channel errors in a transmitted image sign

Details Method for rectifying channel errors in a transmitted image sign Method for rectifying channel errors in a transmitted image sign

1994-08-31

1996-01-02

Razavi, Michael T.

Image analysis

Image enhancement or restoration

382266, 348616, G06K 940

Patent

active

054816270

ABSTRACT:
A novel method for concealing or rectifying channel errors present in a decoded image signal which has been transmitted in a compressed form by using a classified vector quantization technique comprises a step for estimating the class for a current block by detecting boundary edges at each of four groups of neighboring pixels; and a step for estimating the representative vector for the current block by calculating a multiple number of side-matching functions and choosing the candidate vector producing the smallest side-matching function as the representative vector for the current block.

REFERENCES:
patent: 4807033 (1989-02-01), Keesen et al.
patent: 4843630 (1989-06-01), Catros et al.
patent: 5153748 (1992-10-01), Moyer
patent: 5257116 (1993-10-01), Suzuki
patent: 5365604 (1994-11-01), Kwok et al.

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