Eliminating signal quality deteriorations in a reproduced still image
US5200862A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 16, 1991 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Sep 16, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/93
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device capable of reproducing recording information without error and which eliminates a deterioration in a reproduced image quality during a dubbing operation. The still image reproducing device has a change-over switch that is capable of selectively delivering a demodulated image signal obtained through delaying an image signal by a time corresponding to 0.5 H. A control circuit outputs a switching control signal upon completion of one full rotation of a recording medium. A decoder decodes the demodulated recording information in response to a decoder control circuit, enabling the decoder to operate when the change-over switch is delivering the demodulated composite image signal. In the still image recording device, the composite image signal is FM demodulated. The demodulated composite image signal is multiplexed with a signal obtained by encoding and modulating the recording information. The multiplexed signal is supplied to a recording head through the gate circuit. When the recording trigger signal is received, the gate circuit is opened if the decoder is not supplied with the enable signal at the moment when the rotation pulse is received. When the next rotation pulse is r…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.