Accession Number : ADD012679

Title :   Extracting Digital Data from a Bus and Multiplexing It with a Video Signal.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Hague,Duane O ; Barnes,James E

Report Date : 13 Jan 1987

Pagination or Media Count : 27

Abstract : A television video data instrumentation recording system is coupled to a Bus Monitor/Video Encoder to incorporate a digital data recording capability within the normal video signal recording process while allowing for later digital data recovery during video playback. The digital data is acquired from a device addressable serial data bus which is normally an anchronously polled system for exchanging data messages between a bus master device and multiple slave devices where each slave device has a unique device identification code for its messages. Data acquisition is a passive function (relative to the data bus) involving the hardward programmable selection of messages of interest (based on the message device code) and the software programmable deletion of messages that contain no data of interest. Another feature of data acquisition is that a time reference for time-of-acquisition is appended to the acquired messages of interest. (Patents)

Descriptors :   *PATENTS, *MULTIPLEXING, *MONITORS, *MESSAGE PROCESSING, *VIDEO SIGNALS, DATA ACQUISITION, DATA BASES, DIGITAL SYSTEMS, RECOVERY, CODING, IDENTIFICATION, PASSIVE SYSTEMS, COMPUTER PROGRAMS, DIGITAL RECORDING SYSTEMS, EXTRACTION, TIME STANDARDS, PLAYBACK

Subject Categories : Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE