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:
Dec. 14, 1993
Filed:
Jul. 22, 1991
Norman D Richards, Horsham, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
A method of encoding an image for CD-I players comprises obtaining the pixel information as a first matrix (M1) of 768.times.560 pixel component values, decimation filtering (1) the first matrix (M1) to produce a second matrix (M2) of 384.times.560 pixel component values, encoding (2) the second matrix (M2) to produce a first set of DYUV digital data (RDD1) for storage on a compact disc (SM), applying the digital data (RDD1) to a decoder (3) to form a third matrix (M3) of 384.times.560 pixel component values, interpolation filtering (4) the third matrix (M3) to form a fourth matrix (M4) of 768.times.560 pixel component values, forming the difference (5) between the first (M1) and fourth (M4) matrices to produce a fifth matrix (M5) of 768.times.560 difference values and encoding the fifth matrix (M5) as respective multi-bit and/or run length codes (RDD1) for storage on a compact disc (SM). Compatibility with known hardware (the CD-I standard `basecase` player) is obtained by encoding negative difference values using the quantization levels in the guard range (0-15) below black level (16, on a scale of zero to 255).