Abstract: Systems for audio and data transmission in a broadcast band are disclosed. The system comprises a channel condition assessment module at the transmit side to identify an un-occupied or empty channel to transmit. The system also comprises a means to achieve automatic channel coordination between the transmit side and the receive side. Further, the transmit side includes a digital interface module and the receive side includes a digital output interface module configured to control an embedding electronic device. Means for enhancing audio privacy and digital data rate are also disclosed.

Abstract: A method and apparatus for displaying radar data on a display monitor, wherein the monitor is divided into octants, and wherein the radar data defines a pie-shaped slice to be displayed within an octant on the monitor. The radar data has a center point which is defined as a point on an x-y plane, a radius r which is a defined as a number of displacement units in length extending radially from the center point, a starting angle .theta., a delta angle .differential..theta., radial displacement data which defines the color of groups of displacement units along the radius r for the slice, and a quantity Q which is the number of groups of radial displacement data within said radar data. The radar data is received by a data processing system and stored in memory. The video display monitor is updated by a screen refresh memory controlled by a graphics accelerator.