Abstract: Methods and systems are provided for venue-based device control and user/position/venue context determinations. Venue corresponds to a geographic region. Venue relevant information is information associated with a venue. A controlled quasi-transient signal comprises a signal, emitted by an entity intrinsic to the venue and not intended to be utilized for operation of the device, coupled with a quasi-transient signal that is coded with the venue relevant information. When a device located in a venue receives a controlled quasi-transient signal, venue-relevant information associated with the venue can be extracted from the controlled quasi-transient signal. Based on the extracted venue relevant information, the device can be controlled in accordance with a control signal generated based on the venue relevant information.

Abstract: To address the scarcity of radio frequency (RF) spectrum, the disclosed systems offer unique ways to mitigate interference between television broadcasters (including their direct audience and viewers served via cable television) and other concurrent users of the RF spectrum, e.g. for one-way or two-way wireless communication. A preferred embodiment makes use of the “framing” characteristics of the “letterbox” video display format. RF emissions of the simultaneous RF spectrum user are keyed “on” only or substantially only during the time intervals when the blanking intervals and/or letterbox-border video lines are being scanned on the display, i.e. when the potentially affected (interfered with) television display is in the letterbox-frame-scanning portions of each video field. The concurrent uses may support services for voice (including telephony, music etc.), data (including Internet, intranet, etc.

Abstract: To address the scarcity of radio frequency (RF) spectrum, the disclosed systems offer unique ways to mitigate interference between television broadcasters (including their direct audience and viewers served via cable television) and other concurrent users of the RF spectrum, e.g. for one-way or two-way wireless communication. A preferred embodiment makes use of the “framing” characteristics of the “letterbox” video display format. RF emissions of the simultaneous RF spectrum user are keyed “on” only or substantially only during the time intervals when the blanking intervals and/or letterbox-border video lines are being scanned on the display, i.e. when the potentially affected (interfered with) television display is in the letterbox-frame-scanning portions of each video field. The concurrent uses may support services for voice (including telephony, music etc.), data (including Internet, intranet, etc.