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:
Nov. 20, 2001
Filed:
Jan. 27, 1999
Johan Nyström, Stockholm, SE;
Tomas Svensson, Stockholm, SE;
Roar Hagen, Stockholm, SE;
Tor Björn Minde, Gammelstad, SE;
Telefonaktiebolaget LM Ericsson, Stockholm, SE;
Abstract
A channel optimized vector quantization apparatus includes a device for weighting a sample vector x by a weighting matrix A and a device for weighting a set of code book vectors ĉ,by a weighting matrix B. Device form a set of distance measures {d,(Ax,Bĉ,)} representing the distance between the weighted sample vector Ax and each weighted code book vector Bĉ,. Other device form a set of distortion measures {,(x)} by multiplying each distance measure by a channel transition probability P,that an index r has been received at a decoder when an index i has been sent from an encoder and adding together these multiplied distance measures for each possible index r. Finally device determine an index i,corresponding to the smallest distortion measure,(x) and represents the sample vector by this index i,.