Magnetic recording/reproducing apparatus having head structure for selectively recording/reproducing either of two kinds of signals containing different amounts of information
US5341248A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 1993 |
| Grant date | Aug 23, 1994 |
| Priority date | — |
| Expiry date | Feb 3, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/7973
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording/reproducing apparatus is provided which includes a head structure compatible with a long-time play mode in handling either of two kinds of signals containing different amounts of information, such as a current digital picture signal and a high-definition (HD) digital picture signal in the rate of two to one at a constant number of revolutions of the drum by restricting an increase of the number of heads. In an aspect of the apparatus, four heads are arranged on the rotating drum equally 90.degree. spaced, a fifth head of an opposite azimuth is mounted close to any of those heads, the number of drum revolutions is increased to twice larger than the normal number, the current digital picture signal is recorded and reproduced for each channel by using two heads, that is, the fifth head and a head positioned 180.degree. opposite to the fifth head. On the other hand, the HD digital picture signal, containing twice as much information as the current digital picture signal, is recorded and reproduced for two channels by four heads equally 90.degree. spaced, exclusive of the fifth head. According to another aspect, eight heads are arranged on the rotating drum equally …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.