Magnetic recording and reproduction system
US4607293A · kind A · utility
23Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1983 |
| Grant date | Aug 19, 1986 |
| Priority date | — |
| Expiry date | Nov 29, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/8355
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording and reproduction system of a helical scanning type provided with audio heads which rotate together with the rotary video heads so that the frequency-modulated audio signal is recorded by the audio heads on the video track on which the video signal will also be recorded. The audio signal is recorded first on the video track, and then the video signal is recorded over the record of the audio signal, whereby the audio signal has an expanded frequency band thereby to provide an improved sound quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.