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:
May. 07, 1991
Filed:
Apr. 12, 1990
Norman D Richards, Horsham, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
Image data (YUVAR) are received from an image source and separated into luminance (Y) and chrominance (U,V) values. These are DPCM coded (LCO,CCO) to generate separate arrays (LAR, CAR) of delta codes. The arrays (LAR,CAR) are received in a display apparatus via a limited bandwidth data channel (120). The data channel may in particular comprise an optical disc reading device. The arrays (LAR and CAR) are then expanded and combined to generate a desired array (DAR) of standard composite code words. By coding luminance and chrominance separately, the chrominance data can be coded at low resolution relative to a display chrominance resolution so as to obtain a faster image update rate with minimal loss of perceived image quality. The expanding and combining can be performed under program control in a standard display apparatus, for example a Compact Disc-Interactive (CD-I) player.