Non-linear aperture correction circuit
US4312013A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1979 |
| Grant date | Jan 19, 1982 |
| Priority date | — |
| Expiry date | Sep 19, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B9/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a video disc system, geometric variations are recorded on the surface of the record and are representative of recorded picture and sound information. In a video disc playback apparatus for recovering picture and sound information from such a prerecorded record, a playback stylus is utilized to detect the geometric variations. Sound interference in the video signals may be produced by the non-linear characteristics of the playback stylus. A non-linear aperture correction circuit interposed between the playback stylus and the demodulator circuitry of the playback apparatus effects a substantial control of the intermodulation products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.