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:
Mar. 08, 2011
Filed:
Aug. 08, 2003
Rodney Hugh Densham, Charlbury, GB;
William Edmund Cranstoun Kentish, Chipping Norton, GB;
Nicholas John Haynes, Enstone, GB;
Peter Charles Eastty, Eynsham, GB;
Rodney Hugh Densham, Charlbury, GB;
William Edmund Cranstoun Kentish, Chipping Norton, GB;
Nicholas John Haynes, Enstone, GB;
Peter Charles Eastty, Eynsham, GB;
Sony Europe Limited, Weybridge, GB;
Abstract
An original digital audio signal represents unimpaired audio information. The digital audio signal is compressed and encrypted without substantial impairment to produce a first audio signal. A second, unencrypted, audio signal is produced. The first and second audio signals are combined. Preferably the first audio signal is losslessy compressed. The second audio signal may be an impaired version of the original digital audio signal.