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:
Dec. 08, 1998
Filed:
Jul. 11, 1996
Marina Bosi, Redwood City, CA (US);
Grant Davidson, Oakland, CA (US);
Charles Robinson, San Francisco, CA (US);
Martin Dietz, Nurnberg, DE;
Uwe Gbur, Erlangen, DE;
Oliver Kunz, Sesslach, DE;
Karlheinz Brandenburg, Erlangen, DE;
Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V., Munich, DE;
Dolby Laboratories Licensing Corp., San Francisco, CA (US);
Abstract
A method of encoding time-discrete audio signals comprises the steps of weighting the time-discrete audio signal by means of window functions overlapping each other so as to form blocks, the window functions producing blocks of a first length for signals varying weakly with time and blocks of a second length for signals varying strongly with time. A start window sequence is selected for the transition from windowing with blocks of the first length to windowing with blocks of the second length, whereas a stop window sequence is selected for the opposite transition. The start window sequence is selected from at least two different start window sequences having different lengths, whereas the stop window sequence is selected from at least two different stop window sequences having different lengths. A method of decoding blocks of encoded audio signals selects a suitable inverse transformation as well as a suitable synthesis window as a reaction to side information associated with each block.