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
Digital broadcast receiver and method for processing caption thereof
Method and system for imaging a cross section of a specimen
Cosmetic or pharmaceutical peptides containing uncoded amino acids and their use in the treatment and/or care of the skin, mucous membranes, or scalp
Method and apparatus for communicating electronic service guide information in a satellite television system
Plants and seeds of hybrid corn variety CH424126
Ionic compound, anti-static pressure-sensitive adhesive and polarizer comprising the same
Account and customer creation in an on-line banking model
  Randomly Featured Patents
Solid phase synthesis with base N alpha-protecting group cleavage
Tooth shade analyzer system and methods
System and method for providing mobile service
Imide compound and chemically amplified resist composition containing the same
Anti-skinning method and apparatus
Process aid for melt processable polymers
Screen printing machine
Variable shroud for a turbomachine
Spin memory and spin FET