Image signal encoding apparatus using adaptive 1D/2D DCT compres

Details Image signal encoding apparatus using adaptive 1D/2D DCT compres Image signal encoding apparatus using adaptive 1D/2D DCT compres

1993-09-08

1995-07-11

Britton, Howard W.

Television

Bandwidth reduction system

Data rate reduction

H04N 730

Patent

active

054325552

ABSTRACT:
An improved image signal encoding apparatus for processing a digitized image signal for transmission thereof in a compressed form, comprising a horizontal one-dimensional compression path for compressing the digitized image signal utilizing a horizontal correlation therein to provide a first compression signal, a vertical one-dimensional compression path for compressing the digitized image signal utilizing a vertical correlation therein to provide a second compression signal, a two-dimensional compression path for compressing the digitized image signal utilizing the horizontal and the vertical correlations to provide a third compression signal; and a comparator for comparing a first compression error contained in the first compression signal, a second compression error contained in the second compression signal and a third compression error contained in the third compression signal so as to enable the selection of the compression signal having the least error.

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patent: 4999705 (1991-03-01), Puri
patent: 5068724 (1991-11-01), Krause et al.
patent: 5091782 (1992-02-01), Krause et al.
patent: 5196930 (1993-03-01), Kadono et al.

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