Natural luminance transient enhancement

Television – Image signal processing circuitry specific to television – Transition or edge sharpeners

Reexamination Certificate

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Details

C348S026000

Reexamination Certificate

active

06867817

ABSTRACT:
A method and apparatus for enhancing an edge transient contained in a video signal include identifying the edge transient and the edge center of the edge transient in the video signal; selecting a side of the edge transient, relative to an edge center thereof, to enhance; and adding an edge change signal to the video signal to asymmetrically enhance the selected edge transient.

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patent: 0740465 (1996-04-01), None
patent: WO9712482 (1996-09-01), None
Patent Abstracts of Japan, “Waveform Edge Steepening Device”, 07-129533, Apr. 28, 1995, Victor Co of Japan Ltd.
Patent Abstracts of Japan; vol. 1999, No. 05, May 31, 1999, JP 11055546A.
Patent Abstracts of Japan, vol. 017, No. 301, (E-1378), Jun. 10, 1993, JP05022633A.

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