| 摘要 |
The pervasive visibility of television and other screens is leveraged to present pop-up alerts to users. These alerts can be made to appear on any channel at any time, but they are formatted in a way that suits the differing policies of the various channel providers. When an alert is received, an alert mediator determines which channel is currently being played on a first user device. The alert mediator reviews alert-rendering rules for that particular channel and prepares the alert according to those rendering rules. The alert is then presented either to that first user device or to a second user device. A rule can provide for skinning the alert so that the alert fits in with the look and feel of the channel. When a user device displays more than one channel at the same time, the alert mediator chooses which channel's rules to apply in displaying the alert.
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