The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 03, 1992
Filed:
Apr. 01, 1991
Richard W Citta, Oak Park, IL (US);
Stephen M Dicke, Wheeling, IL (US);
Zenith Electronics Corporation, Glenview, IL (US);
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.