Hierarchical encoding and decoding apparatus for a digital image

Details Hierarchical encoding and decoding apparatus for a digital image Hierarchical encoding and decoding apparatus for a digital image

1995-07-19

1997-09-02

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

348421, 348424, H04N 746

Patent

active

056637640

ABSTRACT:
In a hierarchical encoding apparatus, predictors each including a look-up table are used to form predicted signals for respective hierarchical levels. The difference between the predicted signal and the original signal forms the differential signal for the higher hierarchical levels. The look-up table contains either predictive coefficients which are used as weights for pixels of a signal in one hierarchical level to produce a signal at a higher hierarchical level, or representative values which are combined with a dynamic range and redundant component in a set of pixels of a signal in one hierarchical level to produce a signal at a higher hierarchical level. The values in the look-up table are obtained from representative images.

REFERENCES:
patent: 4864396 (1989-09-01), Martens
patent: 5305103 (1994-04-01), Golin
patent: 5331414 (1994-07-01), Golin

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