| 摘要 |
A playlist generator implements a net-based playlist generation process that comprises a multi-stage, hierarchical process. At a highest hierarchical level, the playlist generator applies parameters corresponding to a user's“general”preferences, wherein the parameters are relatively constant. At a lower level of the hierarchy, the playlist generator applies parameters corresponding to the user's“specific”preferences, wherein the parameters are dynamic time-dependent or event-dependent. The playlist generator uses the high-level parameters to generate a subset of material from a global collection of material, and applies the lower-level preferences to this subset of material in response to a change in the user's immediate preferences.
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