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:
Apr. 28, 2009
Filed:
Sep. 20, 2005
Steven E. Saunders, Cupertino, CA (US);
William C. Lynch, Palo Alto, CA (US);
Krasimir D. Kolarov, Menlo Park, CA (US);
Steven E. Saunders, Cupertino, CA (US);
William C. Lynch, Palo Alto, CA (US);
Krasimir D. Kolarov, Menlo Park, CA (US);
Droplet Technology, Inc., Menlo Park, CA (US);
Abstract
A system, method and computer program product provide finer rate control in data compression by processing a data stream through a plurality of parallel subbands, wherein a first subband processes the data differently than a second subband. Separate shift quantization parameters for each separate run-of-zeros compressed storage area or pile can be provided, instead of a single common shift parameter for every coefficient as in the prior art. The parameter value for each such area or pile can be recorded in the compressed output file. The separate shift quantization parameters can also be adjusted dynamically as data is being compressed.