Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Patent
1993-02-03
1994-08-23
Sniezek, Andrew L.
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
360 64, 358330, 358335, H04N 578
Patent
active
053412486
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 45.degree. spaced, ninth and tenth heads of an opposite azimuth are mounted respectively close to any two heads 180.degree. opposite to each other, and the normal number of drum revolutions is used.
REFERENCES:
patent: 4040101 (1977-08-01), Zoellner et al.
patent: 4730222 (1988-03-01), Schauffele
patent: 5175630 (1992-12-01), Tabuchi et al.
"Television Gakkai-Shi" (The Journal of the Institute of Television Engineers of Japan), vol. 42, No. 4 (Apr., 1988), pp. 338-346.
Yamashitsu et al. "An Experimental Study on bit rate reduction and High Density Recording For A Home-Use Digital VTR", IEEE Transactions on Consumer Electronics, vol. 34, No. 3 Aug. 1988 pp. 588-596.
Amada Nobutaka
Arai Takao
Nakagaki Harushige
Noguchi Takaharu
Hitachi , Ltd.
Sniezek Andrew L.
LandOfFree
Magnetic recording/reproducing apparatus having head structure f does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magnetic recording/reproducing apparatus having head structure f, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic recording/reproducing apparatus having head structure f will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-506901