Philips patents Advertisement Enforcing
Philips has filed a patent application to stop people from changing channels during commercials or fast forward commercials for pre-recorded video. It works through the use of a control signal in the video stream.
The patent Apparatus and method for preventing switching from a channel during an advertisement display abstract is defined as:
An apparatus (270) and method is disclosed for preventing a viewer from switching from a channel when an advertisement is being displayed on the channel. The apparatus (270) and method comprises an advertisement controller (270) in a video playback device (150) that (1) prevents a viewer of a direct (non-recorded) broadcast from switching channels when an advertisement is displayed, and (2) prevents a viewer of a recorded program from fast forwarding the recorded program in order to skip past advertisements that were recorded with the program. A viewer may either watch the advertisements or pay a fee in order to be able to change channels or fast forward when the advertisements are being displayed
The patent text mentions that viewers may potentially question the working state of their device and blame the manufacturer:
For a program broadcaster to be able to force viewers to watch advertisements may be greatly resented by the viewers. The manufacturer of a video display device (such as a set top box) has no way to ensure that a program broadcaster will notify the viewers and explain why the viewers are no longer able to switch channels during advertisements. When the remote control keys of the video playback device cease to change channels during advertisements there is a very strong likelihood that the viewers will blame the video display device (and the manufacturer of the video display device) instead of the program broadcaster
All this gives me a tremendous idea for a patent related to audio streams.
Indeed, radio broadcasters have the exact same problems. So my autoradio patent would simply avoid people switching channels when driving and would prevent turning the engine off while an advertisement is streamed.
Brilliant. 
