Two-dimensional subband coding equipment

Details Two-dimensional subband coding equipment Two-dimensional subband coding equipment

2005-01-18

2005-01-18

Young, Brian (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

Reexamination Certificate

active

06844830

ABSTRACT:
A two-dimensional wavelet transformer (10) includes a vertical wavelet transform block (11) and horizontal wavelet transform block (12). The vertical wavelet transform block (11) is supplied with original image data P such that a data string of vertical low-frequency band coefficients (L coefficients) and a data string of vertical high-frequency band coefficients (H coefficients) will be sequentially outputted horizontally from the vertical wavelet transform block (11). The horizontal wavelet transform block (12) is supplied with the L and H coefficients in the output sequence of the vertical wavelet transform block (11), namely, in the horizontal direction. Also, the horizontal wavelet transform block (12) transforms the L and H coefficients alternately. Therefore, the two-dimensional wavelet transformer (10) can work with less memory capacity and in a reduced time.

REFERENCES:
patent: 6058361 (2000-05-01), Mainard

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