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:
Sep. 17, 2019
Filed:
Mar. 01, 2016
Dolby Laboratories Licensing Corporation, San Francisco, CA (US);
Dolby International Ab, Amsterdam Zuidoost, NL;
Jan Froehlich, Munich, DE;
Guan-Ming Su, Fremont, CA (US);
Robin Atkins, San Jose, CA (US);
Scott Daly, Kalama, WA (US);
Jon Scott Miller, Harleysville, PA (US);
Dolby Laboratories Licensing Corporation, San Francisco, CA (US);
Dolby International AB, Amterdam Zuidoost, NL;
Abstract
A content-adaptive quantizer processor receives an input image with an input bit depth. A noise-mask generation process is applied to the input image to generate a noise mask image which characterizes each pixel in the input image in terms of its perceptual relevance in masking quantization noise. A noise mask histogram is generated based on the input image and the noise mask image. A masking-noise level to bit-depth function is applied to the noise mask histogram to generate minimal bit depth values for each bin in the noise mask histogram. A codeword mapping function is generated based on the input bit depth, a target bit depth, and the minimal bit depth values. The codeword mapping function is applied to the input image to generate an output image in the target bit depth.