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:
May. 05, 2020
Filed:
Apr. 13, 2018
Google Llc, Mountain View, CA (US);
Jyrki Alakuijala, Wollerau, CH;
Zoltan Szabadka, Wollerau, CH;
GOOGLE LLC, Mountain View, CA (US);
Abstract
Morphological anti-ringing is disclosed. A method for encoding a block of an image includes generating a transform block for the block of first values, generating quantized transform coefficients for the transform block, determining a clamping value for the block, encoding the quantized transform coefficients in a compressed bitstream, and encoding the clamping value in the compressed bitstream. The clamping value is used to clamp second values. The second values correspond to the first values and result from inverse transforming the transform block. An apparatus for decoding a block of an image includes a memory and a processor configured to execute instructions stored in the memory to decode, from a compressed bitstream, a quantized transform block; obtain, using the quantized transform block, a decoded block of pixel values; decode, from a compressed bitstream, a clamping value for the block; and clamp the pixel values using the clamping value.