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:
Oct. 09, 2012
Filed:
Jul. 27, 2007
Arie Gur, Kiryat Ono, IL;
Israel Greiss, Ra'Anana, IL;
Arie Gur, Kiryat Ono, IL;
Israel Greiss, Ra'Anana, IL;
DSP Group Limited, Greiss, IL;
Abstract
A method of for aliasing suppression in a sub-band speaker-phone system, comprising receiving an analog audio signal from a near end analog audio input interface, converting said analog audio signal into a near end digital audio signal using an A2D; receiving N≧2 sub-bands decoded digital audio data from a far-end, merging said N≧2 sub-bands decoded digital audio data into a wideband (WB) decoded digital audio data to be converted by D2A unit and provided to analog audio output interface; splitting said near-end digital audio signal into N≧2 near-end sub-bands digital audio signals; subtracting a simulated digital signal from said sub-band digital audio signal, wherein said simulated digital signal is created by an echo cancelling unit; and applying dynamic anti aliasing suppression (DAAS) with varying aggressiveness on each of said N≧2 near-end sub-band digital audio signals.