Abstract:
Systems and methods for transmitting and receiving diverse signals across regions using a minimum of frequency capacity and maintaining compatibility with the heritage system. A system of the invention comprises at least one broadcast transmitter for transmitting a broadcast signal in a first frequency band to a receiver, at least one gapfiller transmitter for transmitting a gapfiller signal in a second frequency band to the receiver and at least one set of reuse transmitters for transmitting a plurality of spotbeam signals in the first frequency band to define coverage regions and at least one coverage gap where the spotbeam signals are not transmitted. A method of the invention comprises receiving a first signal, receiving a second signal, generating a first intermediate frequency (IF) signal from the first signal, generating a second IF signal from the second signal, filtering the second IF signal to produce a filtered second IF signal and combining the filtered second IF signal and the first IF signal.
Abstract:
A method and apparatus for perceptibly masking acquisition time in a digital broadcast system transmitting programs on multiple channels is incorporated in a receiver for the information signal transmission system. The apparatus and the method generate a reduced time response, independent of the acquisition time for complete video images, and provide an output for portraying a masking display from the receiver before the acquisition time has expired. A generator and the output display are easily employed with known video transmission systems by suing a microcontroller switch to select channels and retrieve audio or visual cues in response to an output response less than that necessary for communicating the entire program image.