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 discInfo
- 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
Links
- 238000012544 monitoring process Methods 0.000 abstract 1
Landscapes
- 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.
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) |
-
1978
- 1978-11-28 IT IT5210978A patent/IT1106359B/en active
Also Published As
Publication number | Publication date |
---|---|
IT7852109A0 (en) | 1978-11-28 |
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