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:
Jan. 08, 2008
Filed:
May. 08, 2003
Robert Loring Andersen, San Francisco, CA (US);
Michael Mead Truman, San Francisco, CA (US);
Philip Anthony Williams, San Francisco, CA (US);
Stephen Decker Vernon, Hillsborough, CA (US);
Robert Loring Andersen, San Francisco, CA (US);
Michael Mead Truman, San Francisco, CA (US);
Philip Anthony Williams, San Francisco, CA (US);
Stephen Decker Vernon, Hillsborough, CA (US);
Dolby Laboratories Licensing Corporation, San Francisco, CA (US);
Abstract
An audio encoder discards spectral components of an input signal and uses channel coupling to reduce the information capacity requirements of an encoded signal. Channel coupling represents selected spectral components of multiple channels of signals in a composite form. An audio decoder synthesizes spectral components to replace the discarded spectral components and generates spectral components for individual channel signals from the coupled-channel signal. The encoder provides scale factors in the encoded signal that improve the efficiency of the decoder to generate output signals that substantially preserve the spectral energy of the original input signals.