Resources Contact Us Home
Television signal data transmission system

Image Number 5 for United States Patent #4706284.

A television signal data transmission system comprises means for transmitting a television signal in which the phase of the RF carrier is modified during a periodically recurring interval by a SAW filter having a varying phase response between the video and audio carrier frequencies of the signal. The periodically recurring interval is modulated between a first width and a second smaller width respectively representing complementary logic states of a data bit. The first width of the width modulated interval preferably extends between two points respectively located within the non-viewable, overscan portions of the video signal immediately adjacent and on either side of a horizontal blanking interval of the television signal. The transmitted signal is received by a decoder which includes a phase modulation detector for detecting the width modulated intervals and a pulse width discriminator responsive thereto for deriving the data bits.

  Recently Added Patents
Monitoring and correcting upstream packet loss
Broadband optical network apparatus and method
Capacitance sensing
Inductive signal transfer system for computing devices
Laser processing method and apparatus
Battery power management system and method
Method of forming a semiconductor package
  Randomly Featured Patents
Automatic transmission
Manufacturing method of liquid crystal display device
Optical apparatus which uses a virtually imaged phased array to produce chromatic dispersion
Synthetic runway surface system
Data analysis system using virtual databases
Voltage-controlled filter circuit, a semiconductor integrated circuit device for signal processing, and a signal reading apparatus using the circuit and the apparatus
True/complementer for a half-band filter
Composition for nasal administration of insulin
Organization system for ad campaigns
Capacitive fluid level sensor