Dynamic magnetic information storage or retrieval – General recording or reproducing – Recording-or erasing-prevention
Patent
1995-03-22
1998-04-21
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Recording-or erasing-prevention
360 8, 360 7305, 360 68, 360 61, 360 7308, G11B 1504
Patent
active
057424446
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
This invention relates to a recording apparatus adapted for recording digital input data onto a recording tape by using a rotary recording head, and a reproducing apparatus adapted for reproducing digital data recorded on the recording tape by using a rotary reproducing head.
2. Background Art
As a recording/reproducing apparatus such as a tape streamer, etc. adapted for recording and reproducing digital data, a recording/reproducing apparatus of the helical scan system adapted for obliquely carrying out scanning with respect to length direction of a recording tape such as a magnetic tape, etc. by rotary head is known. There are instances where such a recording/reproducing apparatus, e.g., a tape streamer, etc. is used as a data storage unit (device) or a data memory unit (device) for recording digital data outputted from an external equipment such as a personal computer, etc. onto a recording tape, and to reproduce data from the recording tape in the case where recorded data is required.
At the time of inputting digital data from an external device (unit) to such recording/reproducing apparatus to allow the recording/reproducing apparatus to store it, digital input data from the external device is once (temporarily) written into buffer memory to read out digital input data from the buffer memory when quantity of digital input data written in the buffer memory is above a predetermined value to record it onto the recording tape. Moreover, at the time of outputting digital data recorded by the recording/reproducing apparatus to external device, data reproduced from the recording tape is once (temporarily) written into buffer memory to read out digital data from the buffer memory when quantity of digital data written in the buffer memory is above a predetermined value to sent it to the external device.
Meanwhile, there are instances where, at the time of recording or reproducing data as described above, rate of digital data inputted and outputted to and from buffer memory of the recording/reproducing apparatus may change.
For example, in the case where rate of input data is higher than recording rate of recording tape at the time of recording data, external device stops data output and waits until digital data in buffer memory of the recording/reproducing apparatus is outputted, and quantity of digital data is less than a predetermined quantity.
On the contrary, in the case where rate of input data is lower than recording rate of the recording tape, the external device stops running of recording, and waits until quantity of digital data stored in the buffer memory becomes equal to a predetermined quantity. In this case, since recording head exceedingly runs with respect to recording position on the recording tape when running of the recording tape is caused to undergo stop (halt) operation, an operation called re-positioning, i.e., head position detecting operation to run the recording tape in an opposite direction to detect the recording position is carried out.
Moreover, in the case where rate of the input data is lower than recording rate of recording tape, such an approach is conceivable to stop running of recording tape as described above to continue sending dummy data to the recording tape until quantity of digital data recorded in buffer memory becomes equal to a predetermined quantity.
Meanwhile, in the case where rate of input data is lower than recording rate of recording tape, bad influence on the recording tape might take place by the above-mentioned re-positioning. At this time, if the recording tape is run without carrying out the re-positioning, useless data would be recorded onto the recording tape. Accordingly, capacity of the recording tape is decreased.
In addition, also at the time of reproduction of data, in the case where rate of output data is lower than reproduction speed of recording tape, such an approach would be employed to stop running of the recording tape to carry out re-positioning. Also in this case, useless time and/or bad influence on the reco
REFERENCES:
patent: 4758899 (1988-07-01), Tsukiyama
patent: 4771345 (1988-09-01), Watanabe
patent: 5045954 (1991-09-01), Oishi
patent: 5086358 (1992-02-01), Takei
patent: 5335116 (1994-08-01), Onishi
patent: 5349479 (1994-09-01), Arimura
Sato, Yoichi, "Statistical Multiplicating Characteristics of Multimedia Signal in High-Speed Burst Multiple Transmitting System", IEICE Thesis Journal, vol. J72-B-I, No. 11, Nov., 1989 pp. 1112-1119.
"Nikkei Electrnics", pp. 147-155, published by Nikkei BP Co., Mar. 30, 1992 .
Faber Alan
Frommer William S.
Psitos Aristotelis M.
Sinderbrand Alvin
Sony Corporation
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