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:
May. 25, 2010
Filed:
Dec. 15, 2004
Stefan Bruhn, Sollentuna, SE;
Ingemar Johansson, Lule{dot over (a)}, SE;
Anisse Taleb, Kista, SE;
Patrik Sandgren, Sundbyberg, SE;
Stefan Bruhn, Sollentuna, SE;
Ingemar Johansson, Lule{dot over (a)}, SE;
Anisse Taleb, Kista, SE;
Patrik Sandgren, Sundbyberg, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
Signals of different channels are combined into one mono signal. A set of adaptive filters, preferably one for each channel, is derived in a respective filter adaptation unit. When an adaptive filter is applied to the mono signal it reconstructs the signal of the respective channel under a perceptual constraint. The perceptual constraint is a gain and/or shape constraint. The gain constraint allows the preservation of the relative energy between the channels while the shape constraint allows more stability by avoiding unnecessary filtering of spectral nulls. The transmitted parameters are the mono signal, in encoded form, and the parameters of the adaptive filters, preferably also encoded. The receiver reconstructs the signal of the different channels by applying the adaptive filters and possibly some additional post-processing.