Video decoder with functions to detect and process errors in enc

Details Video decoder with functions to detect and process errors in enc Video decoder with functions to detect and process errors in enc

1995-11-29

1998-12-29

Elmore, Reba I.

Excavating

395173, H03M 1300

Patent

active

058547991

ABSTRACT:
A video decoding apparatus for decoding encoded video data to continuously produce decoded pictures. The video data includes a series of pictures, each picture contains a series of slices, and each slice contains a series of macroblocks. A dequantizer performs dequantization of the video data based upon a quantization threshold value. A motion-vector restoring circuit restores data for each macroblock. A direct current error detector is provided to detect erroneous macroblocks based upon the dequantized data. A motion-area error detector is provided to detect erroneous macroblocks based upon the restored motion vector data. An erroneous macroblock is replaced by a corresponding macroblock from a preceding picture. Subsequent macroblocks in a slice may also be replaced by corresponding macroblocks from a preceding picture.

REFERENCES:
patent: 5243428 (1993-09-01), Challapali et al.
patent: 5377266 (1994-12-01), Katta et al.
patent: 5636279 (1997-06-01), Katta et al.

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