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:
Feb. 20, 2001
Filed:
Aug. 21, 1997
Fure-Ching Jeng, Sunnyvale, CA (US);
Cheng-Tie Chen, San Jose, CA (US);
Chia-Chun Huang, Sunnyvale, CA (US);
Stream Machine Company, San Jose, CA (US);
Abstract
Integrated circuit provides single-pass, real-time digital image encoding by digital signal processor for variable bit rate (VBR) control to improve decoded output quality. Possible peak bit rate range for multiple groups of pictures (GOP) and averaged bit rate limit encoded signal bit rate. Possible bit rate range constraint sets upper/lower range, which is pre-specified or dynamically adapted for current and future GOPs. Signal processor calculates perceptual weighting variable at macroblock level for multiple GOPs, nominal quantization parameters for multiple GOPs, quantization parameter associated at picture level, effective bit rate for each GOP, bit allocation for each picture, and total bit allocation for multiple GOPs. Variable rate signal is recordable in DVD or camcorder device.