Browse Prior Art Database

Three Color Video Tape Recording System

IP.com Disclosure Number: IPCOM000093099D
Original Publication Date: 1967-May-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Marrs, RE: AUTHOR

Abstract

This video color recording system has black and white vidicon camera 10, rotating color wheel 11, rotating head helical-scan assembly 12 comprising timing track 13 and write head 14, another helical-scan head assembly 15 comprising three read heads 16 and switching devices 17, and color receiver 18 having three color guns 19...21. This system results in high-quality color and resolution in television for still images and for limited motion images. Recorder 12 and playback unit 15 can be the same unit in which only one of the three read heads 16 is utilized as record head 14.

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Three Color Video Tape Recording System

This video color recording system has black and white vidicon camera 10, rotating color wheel 11, rotating head helical-scan assembly 12 comprising timing track 13 and write head 14, another helical-scan head assembly 15 comprising three read heads 16 and switching devices 17, and color receiver 18 having three color guns 19...21. This system results in high-quality color and resolution in television for still images and for limited motion images. Recorder 12 and playback unit 15 can be the same unit in which only one of the three read heads 16 is utilized as record head 14.

Wheel 11, comprised of red, green and blue filters used in conjunction with camera 10, allows the sequential recording of three tracks 22...24 of intelligence by head 14. Each track corresponds to a color in wheel 11 and requires 1/30 of a second to be recorded. The video tape is advanced one track for each color to record the next color on the next track. Timing track 13 on rotating write head 14 generates horizontal line synchronization pulses. The latter trigger the camera's horizontal sweep for the purpose of insuring time registration between the tracks recorded on successive head revolutions.

The tape is advanced one track per scan, identically to the recording process so that each track is read three times, once by each head. Thus, on the second scan, heads 16 read track 23...25 simutaneously. Switch 17 switches the heads between the three color...