Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Multiplexed audio-video signal transmission system through pair-wire










Image Number 14 for United States Patent #5778303.

A multiplexed audio-video signal transmission system has a camera-equipped intercom which produces a balanced audio-video signal. A twisted pair-wire connected to the intercom transmits a multiplexed signal of audio signal, video signal modulated to a frequency band not overlapping the audio signal frequency, and DC power. The audio signal and video signal are carried in the pair-wire in opposite phase in a balanced condition, and the DC power is carried between the pair-wire. A relay device is inserted in the pair-wire to refine the video signal. Main line branching device and door branching device are provided to branch out the multiplexed signal to a television equipped control unit 17.








 
 
  Recently Added Patents
Method of manufacturing acrylic film, and acrylic film
Pixel structure of a solid-state image sensor employing a charge sorting method
Light emitting device
Techniques for data assignment from an external distributed file system to a database management system
Faucet handle
Adaptive take-off strips for smoothing ink consumption
Methods and devices for enforcing network access control utilizing secure packet tagging
  Randomly Featured Patents
Apparatus for removing tires from the rims of heavy vehicles such as trucks and busses
Color photographic recording material for the production of color images
Delivery device comprising gas diffuser for thin film deposition
Authenticating a requestor without providing a key
Copyright protection system, modular exponentiation operation apparatus, and modular exponentiation operation method
Magnetic brush development apparatus for toner add/mix dispenser
Cell analysis apparatus and methods
Optical sensor
Toxins active against pests
Red and green fluorosulfide phosphor, preparation method and white-light emitting diodes