System and method for playlist generation based on similarity data

Abstract

Methods and arrangements for facilitating media playlist generation for a program participant based at least in part on media library inventory information provided by a number of program participants. The system or program in which the individuals are participating is an on-line media store. Those individuals that decide to be program participants are interested in organizing, maintaining and playing their music, based at least in part, on data derived from a population of other participants in the program that have similar or the same music in their libraries. To be a program participant, the individual music holder must send, and the on-line music store receive, data representative of that program participant's media inventory. This data typically contains identification data of the individual media items presently contained in that participant's media library regardless of the individual media item's source. The system or program determines an incidence of co-occurrence of pairs of individual media items in different program participants' media libraries. Based on this determination, a similarity rating is assigned between the pairs of individual media items based on the determined incidence of co-occurrence in the different program participants' media libraries.