Satellite video multiplexing communications system
Television information system
Transmitting two television signals through one channel
Method of simultaneously transmitting a plurality of television signals on a single radio link and apparatus adapted to carry out said method
Passenger vehicle polling system having a central unit for polling passenger seat terminal units
Method and apparatus for tv broadcasting Patent #: 4903126
ApplicationNo. 457403 filed on 12/18/1989
US Classes:348/469, FORMAT348/385.1, Plural video programs in single channel370/477, Transmission bandwidth conservation370/521, Time compression or expansion455/69, Transmitter controlled by signal feedback from receiver455/88Transceiver controlling a separate transceiver or receiver
ExaminersPrimary: Shepperd, John W.
Assistant: Parker, Michael D.
Attorney, Agent or Firm
Foreign Patent References
International ClassH04N 007/08
AbstractA video broadcasting method and apparatus. The broadcasting method generally includes the steps of selecting one or more channels from a plurality of available channels, and scanning the selected channels for generating signals identifying these selected channels. The channel identifying signals are then fed back to a transmitter unit over a first carrier frequency. The feedback signals are used to selectively identify the channels to be transmitted. The signals from the selected channels are compressed, multiplexed and transmitted over a second carrier frequency to a reception unit, where the signals are demultiplexed and separated into separate channels, and stored for a predetermined period of time. The separated signals are then decompressed, reconstructed and displayed on a real-time basis.