If you rely on Apple's devices running IOS and will detect when the environment does not allow recording of copyrighted content. A patent filed by the company in 2009 and now provides only granted the use of infra-red for this.
The infra-red technology is not exactly new. The older remotes already have this form of data exchange, which was also used in some phones (Nokia say so). Apple's patent describes the use of a sensor and an infra-red to iPhone, iPod Touch and iPad 2. Coupled with the camera on these devices, the IOS could see if any device on stage or in the environment by sending infrared signals to the ban for recording.
If the recording is not permitted, the iPhone just would be prevented from using the application of video camera (any one who uses this piece of hardware). Apple provides for the use of technology in concert halls, cinemas, theaters and other places where the contents are potentially protected by copyright.
However, not everything in this patent relates to piracy and copyright protection. The infra-red could also be used for a museum to send additional data about a given work that is close to the device (the concepts behind it, for example). Nothing that a simple Internet access is not resolved, however.
