Prefilter, compressive coding pre-processing apparatus and...

Details Prefilter, compressive coding pre-processing apparatus and... Prefilter, compressive coding pre-processing apparatus and...

2006-04-24

2009-12-29

Do, Anh Hong (Department: 2624)

Image analysis

Image compression or coding

C382S233000, C382S260000, C382S263000

Reexamination Certificate

active

07639884

ABSTRACT:
A prefilter for use in a compressive coding apparatus, the compressive coding apparatus including the prefilter for limiting a frequency band of an input image and a compressive coding unit for implementing compressive coding of an image signal of which frequency band is limited with the prefilter, the prefilter includes: a time filter unit; a two-dimensional filter unit; and an enhancement unit. A compressive coding pre-processing apparatus provided with the prefilter includes: a prefilter unit for attenuating a diagonal frequency component of each image; a pixel skipping unit for skipping a pixel of an image signal of which diagonal frequency component is attenuated by the prefilter unit by folding back a horizontal high frequency component to a vertical high frequency component, or folding back the vertical high frequency component to the horizontal high frequency component; and a pixel space contracting unit for contracting a space of the skipped pixel.

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Y. Ninomiya, “Muse-Hivision Transmission Method-;” Corona Publishing Co., Ltd.; Dec. 1990 (11 Sheets including cover sheet.)/Discussed in the specification.

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