| 摘要 |
A Personal Video Recorder (PVR) 30 for decoding digital transmitted signals for supply to a viewer's television set 40 comprises first input connection means 46 for connection to a source of broadcast digital video and/or audio signals, output means for connection to a viewer's television set; control means 42 to control operation of the viewing unit, first data storage means 52 for temporary storage of a broadcast programme, second data storage means 54 for storage of targeted advertisements and second connection means BC for two-way communication through a firewall 48. A method of generating credits in a system which includes the PVR comprises the steps of: a viewer indicating that he is willing to watch targeted adverts in association with a live broadcast television programme; the PVR pausing the television broadcast, recording it temporarily in temporary storage means, and showing targeted adverts to the viewer for a predetermined period; the PVR showing the viewer the television broadcast from the time it was paused, and sending a signal to a central credit recording means to indicate that the viewer has been shown the targeted adverts; and the central credit recording means recording an incremental credit for that viewer.
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