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:
Aug. 29, 2006
Filed:
Jun. 18, 2002
Schuyler Cullen, Palo Alto, CA (US);
Edward R. Ratner, Sunnyvale, CA (US);
Rasmus Larsen, San Francisco, CA (US);
David B. Kita, Milpitas, CA (US);
Schuyler Cullen, Palo Alto, CA (US);
Edward R. Ratner, Sunnyvale, CA (US);
Rasmus Larsen, San Francisco, CA (US);
David B. Kita, Milpitas, CA (US);
PTS Corporation, San Jose, CA (US);
Abstract
A process and apparatus for allocating bits between the stages of a multi-stage digital image compression scheme with quantizer feedback is disclosed. The process selects a quantization schedule (from a finite number of possibilities) for all stages that minimizes an estimate of total distortion while keeping total bit demand below a constraint; uses said schedule to actually quantize one stage of the compression scheme; selects a new quantization schedule for the remaining stages using estimates for distortion and bit demand that are updated to reflect the quantization of the previous stage; actually quantizes the next stage according to the new quantization schedule; and continues recursively until it has chosen an actual quantization scale for every stage of the compression scheme.