Patent · US Active

Double weighted correlation scheme

US8626772B2 · kind B2 · utility

1Cited by

0References

12Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Mattias Lidström · Stockholm, SE
Jonas Björk · Lund, SE
Joakim Söderberg · San Francisco, US

Key dates

Filing date	Sep 29, 2008
Grant date	Jan 7, 2014
Priority date	—
Expiry date	Mar 23, 2029

Classification

Technology area (CPC G)Physics
CPC primaryG06F16/9535
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A method is provided for determining a correlation between a reference user and another user on the basis of two sets of ratings, where each rating is associated with a respective user. In response to a trigger, user ratings associated with the reference user and user ratings associated with the other user are collected, and all co-rated items of these two sets are correlated in the basis of an adjusted cosine correlation function which is weighted by a first and a second weighting function. The correlation is then stored and may be repeated for a plurality of users. The stored correlations may be used e.g. for ranking purposes.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.