Recording control device and method utilizing a test signal having multiple frequencies
US5598273A · kind A · utility
5Cited by
7References
46Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 24, 1995 |
| Grant date | Jan 28, 1997 |
| Priority date | — |
| Expiry date | Aug 24, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/7936
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a magnetic recording control device, a plurality of test signals of different frequencies are recorded on and reproduced from a magnetic recording medium, and the reproduction levels of the test signals are detected. From the detection results, the frequency characteristics and electro-magnetic conversion characteristics of the magnetic recording medium are judged. A frequency correction in accordance with the judged frequency characteristics, and a record level correction in accordance with the judged electro-magnetic conversion characteristics are conducted on a video signal to be recorded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.