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. 14, 2002
Filed:
Apr. 09, 1999
Charles K. Chui, Menlo Park, CA (US);
Haishan Wang, Stanford, CA (US);
PicSurf, Inc., Mountain View, CA (US);
Abstract
A data encoder and method encodes color image data. The image data include Y, U and V data. A data image quality level is selected, which corresponds to a compression ratio. The Y data is encoded using a wavelet or wavelet-like compression method in accordance with the selected data image quality level. When the compression ratio is less than a threshold value, indicating a low compression ratio, the U and V data are compressed using a JPEG compression method. Otherwise the U and V data are compressed using the wavelet or wavelet-like compression method. The encoded image data includes an indication of which compression method was used to encode the U and V data. When encoded image data is decoded by a data decoder, the decoder determines which compression method was used to encode the U and V data, and then decodes the encoded image data accordingly.