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:
Oct. 30, 2012
Filed:
May. 17, 2010
Chao-tsung Huang, Kaohsiung, TW;
Yu-wei Chang, Hsinchu, TW;
Chao-Tsung Huang, Kaohsiung, TW;
Yu-Wei Chang, Hsinchu, TW;
Novatek Microelectronics Corp., Hsinchu, TW;
Abstract
A bit rate control circuit for image compression includes a compression unit, a R-value calculation unit, a linear quantization factor (LQF) calculation unit. The compression unit is used to performs a first quantization process on an image based on a default LQF (LQF) to obtain an initial bits per pixel (bbp) with an initial number of zero coefficients (R). The R-value calculation unit calculates out a target R value (R) based on the initial bits per pixel (bbp), the initial number zero coefficients (R), and a target bpp (bbp). The LQF calculation unit calculates a target LQF (LQF) based on the target R value R. The LQFcan be used to perform a second compression on the image to obtain a compressed image corresponding to the target bpp (bpp).