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:
Apr. 18, 2006
Filed:
Jan. 29, 2004
Applicant:
Kadayam Thyagarajan, San Diego, CA (US);
Inventor:
Kadayam Thyagarajan, San Diego, CA (US);
Assignee:
Qualcomm Incorporated, San Diego, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04N 7/12 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus and method to encode the run-lengths and amplitude of the quantized DCT coefficients in a lossless manner is used to achieve compression. Specifically, Golomb-Rice coding is used to encode both zero runs and non-zero amplitudes of the DCT coefficients after quantization. It is found that the use of a scheme taking advantage of an exponential distribution of data, such as Golomb-Rice coding, allows for higher coding efficiencies than alternate schemes.