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:
Jul. 23, 2013
Filed:
Feb. 16, 2012
Wen-hsiung Chen, Sunnyvale, CA (US);
Fang Wu, Pleasanton, CA (US);
John A. Toebes, Cary, NC (US);
Dov Rosenfeld, Oakland, CA (US);
Gregory D. Pelton, Raleigh, NC (US);
Wen-hsiung Chen, Sunnyvale, CA (US);
Fang Wu, Pleasanton, CA (US);
John A. Toebes, Cary, NC (US);
Dov Rosenfeld, Oakland, CA (US);
Gregory D. Pelton, Raleigh, NC (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Disclosed are apparatuses, computer readable storage media with instructions that carry out methods, and methods of (a) coding quantized transform coefficients as occur in image compression to form codewords, and (b) decoding a bitstream comprising the codewords. The coding combines a position identifying method to identify the relative position of clusters of consecutive non-zero-valued quantized transform coefficients, an amplitude event identifying method to identify amplitude events in the clusters of non-zero-valued quantized transform coefficients, and a coding method to code the position events, amplitude events, and signs of the amplitudes in the clusters. The coding method is particularly applicable to an ordered series of quantized transform coefficients where clusters are likely-to-occur.