IT1106359B - Video information recording and playback system - uses laser writing beam, intensity modulated with information to be stored to form tracks on video disc - Google Patents

Video information recording and playback system - uses laser writing beam, intensity modulated with information to be stored to form tracks on video disc

Info

Publication number
IT1106359B
IT1106359B IT5210978A IT5210978A IT1106359B IT 1106359 B IT1106359 B IT 1106359B IT 5210978 A IT5210978 A IT 5210978A IT 5210978 A IT5210978 A IT 5210978A IT 1106359 B IT1106359 B IT 1106359B
Authority
IT
Italy
Prior art keywords
track
video
stored
information
playback system
Prior art date
Application number
IT5210978A
Other languages
Italian (it)
Other versions
IT7852109A0 (en
Original Assignee
Mca Disco Vision
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mca Disco Vision filed Critical Mca Disco Vision
Priority to IT5210978A priority Critical patent/IT1106359B/en
Publication of IT7852109A0 publication Critical patent/IT7852109A0/en
Application granted granted Critical
Publication of IT1106359B publication Critical patent/IT1106359B/en

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  • Optical Recording Or Reproduction (AREA)

Abstract

The video information is formed into a frequency modulated signal which is used to vary the intensity of a lser writing beam which forms a track on the metallised surface of a video disc. The disc consists of non-reflective lengths of the track, corresp. to marks of the frequency modulated waveform, and reflective lengths of the track corresp. to the spaces of the frequency modulated waveform. The track can be read by use of a reading light beam and collecting light reflected from the reflective lengths as the beam moves over the track. There is feedback appts. for maintaining the average intensity of the writing light beam, and devices for monitoring the record after it has been formed by comparing it with the original waveform to be recorded.
IT5210978A 1978-11-28 1978-11-28 Video information recording and playback system - uses laser writing beam, intensity modulated with information to be stored to form tracks on video disc IT1106359B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
IT5210978A IT1106359B (en) 1978-11-28 1978-11-28 Video information recording and playback system - uses laser writing beam, intensity modulated with information to be stored to form tracks on video disc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5210978A IT1106359B (en) 1978-11-28 1978-11-28 Video information recording and playback system - uses laser writing beam, intensity modulated with information to be stored to form tracks on video disc

Publications (2)

Publication Number Publication Date
IT7852109A0 IT7852109A0 (en) 1978-11-28
IT1106359B true IT1106359B (en) 1985-11-11

Family

ID=11276387

Family Applications (1)

Application Number Title Priority Date Filing Date
IT5210978A IT1106359B (en) 1978-11-28 1978-11-28 Video information recording and playback system - uses laser writing beam, intensity modulated with information to be stored to form tracks on video disc

Country Status (1)

Country Link
IT (1) IT1106359B (en)

Also Published As

Publication number Publication date
IT7852109A0 (en) 1978-11-28

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