System for peaking a video signal with a control signal represen

Details System for peaking a video signal with a control signal represen System for peaking a video signal with a control signal represen

1991-04-01

1992-11-03

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358166, H04N 5208

Patent

active

051610159

ABSTRACT:
A peaking system for a compressed digital video signal includes a transform coder for converting 8.times.8 blocks of video pixels into corresponding groups of transform coefficients and supplying the coefficients to an image classifier where the coefficients are classified according to their perceptual nature or image types, e.g. edge, flat area, texture, etc. of the video represented thereby. Control signals for horizontal and vertical perceptual classifications are developed and applied to a peaking filter for selectively peaking the video signal in accordance with the horizontal and vertical control signals. A receiver operates to recover the selectively peaked compressed video signal. In another embodiment, the transmitter supplies the video signal with the developed control signals for use by a receiver in selectively peaking the recovered video signal in accordance with the control signals.

REFERENCES:
patent: 4179709 (1989-12-01), Workman
patent: 4263616 (1981-04-01), Lee
patent: 4603353 (1986-07-01), Henson
patent: 4734767 (1988-03-01), Kaneko et al.
patent: 4780761 (1988-10-01), Daley et al.
patent: 4931869 (1990-06-01), Amor et al.
patent: 5014119 (1991-05-01), Faroudja

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