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:
Feb. 10, 2009
Filed:
Mar. 27, 2003
Robert Mark Stefan Porter, Winchester, GB;
Nicholas Ian Saunders, Basingstoke, GB;
James Edward Burns, Basingstoke, GB;
Jonathan Living, Basingstoke, GB;
Robert Mark Stefan Porter, Winchester, GB;
Nicholas Ian Saunders, Basingstoke, GB;
James Edward Burns, Basingstoke, GB;
Jonathan Living, Basingstoke, GB;
Sony United Kingdom Limited, Weybridge, GB;
Abstract
A data compression apparatus for performing data compression on input data comprises a quantisation parameter estimation arrangement for deriving an estimated value of a quantisation parameter used in a previous compression/decompression cycle applied to the input data, by detecting rounding effects in data values of at least a subset of the input data; and a parameter selection arrangement, responsive to the quantisation parameter estimation arrangement for selecting a quantisation parameter for use in compression of the input data.