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:
Oct. 26, 2004
Filed:
Jul. 10, 2000
Richard Shen, Leonia, NJ (US);
Alan Cavallerano, White Plains, NY (US);
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A method and apparatus for the selective peaking of portions of a video signal is provided. The video signals, such as those transmitted in compressed form, in accordance with MPEG Standards, can be presented as blocks of data encoded using Discrete Cosine Transforms (DCT). The Discrete Cosine Transform coefficients corresponding to the chrominance values of the signal can be obtained and analyzed. The analysis and corresponding amounts of enhancement (peaking) can be performed on a block-by-block, I-frame by I-frame, basis to selectively peak portions of a video signal. If the DCT coefficients for a portion of the signal exceed or fall within a pre-selected value or range, that portion of the signal can be subjected to peaking. For example, if the high frequency horizontal DCT coefficients exceed (or fall within) a pre-set threshold value or range, a horizontal peaking circuit can be set to peak that portion of the signal. The signal processor can be set for gain in proportion to how much the coefficients exceed the threshold. A similar approach can be applied in the vertical spatial direction.