Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Data communication system with random and burst error protection and correction










Image Number 6 for United States Patent #4156867.

A data communication system for use in the control and monitoring of mobile stations, for example, in a bus monitoring system, from a central station over a communication channel carrying both data and voice information. Information is encoded into digital messages having a start code followed by one or more data blocks. The start code identifies the beginning of the data block that follows and enables synchronization of clock circuitry to the received data frequency. The data blocks have N digital words with M binary bits where one word is a parity word and N-1 words are data words. Each of the data words has a data portion and parity portion coded for correction of at least one error. Reliability is enhanced by a data detector which discriminates between data and noise or voice to provide an indication of the presence of data. In transmitting the digital messages, the bits of the N words in each data block are interleaved to provide protection against error bursts.








 
 
  Recently Added Patents
Charged particle source with multiple selectable particle emitters
Ottoman
Method and system for determining an optimal missile intercept approach direction for correct remote sensor-to-seeker handover
System and method for video encoding
Image capture apparatus and program
Nonvolatile semiconductor memory device
Catalyst and process of hydrocarbon feedstock reformation to hydrogen and carbon monoxide
  Randomly Featured Patents
Semiconductor laser device and its manufacturing method, and optical disc reproducing and recording apparatus
Method of repairing water closet anchoring to fractured closet flange and spanner clamp therefor
Call and stack mechanism for procedures executing in different rings
Freeze-dried preparation of human growth hormone
Semiconductor memory device and a data path using the same
Electric traffic light, with acoustic signs and with an indication of backward counting
Brake lock knob assembly
System and method for continuous RFID encoding
Trigger device for cross bows, with automatically activated safety means
Method for adjusting parameters of an electric motor and variable speed drive using such a method