Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Patent
1990-09-25
1993-08-24
Smith, Jerry
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
360 8, 360 102, 360 191, 360 47, 360 61, 358312, G11B 5588, G11B 509
Patent
active
052394301
ABSTRACT:
In a digital information signal reproducing apparatus in which a first digital audio signal and a second digital audio signal having the same contents are recorded on two oblique tracks which are close to each other on a record tape while the latter is run at a normal speed, and in which the first and second digital audio signals are reproduced from the tape by plural rotary heads; a head position controller is operative to control a scanning position of each of the rotary heads so that the latter scan the tracks during variable speed reproduction when the tape is run at a speed different from the normal speed, and to cause the heads to periodically jump over a plurality of the tracks; a detector detects when the rotary heads controlled by the head position controller jump over the plurality of tracks; and a processor responsive to the detector for switching the first digital audio signal and the second digital audio signal, as in a cross-fading operation, for a predetermined period when a jump is detected and selecting one of the first digital audio signal and the second digital audio signal depending on an error state in a period other than such predetermined period, thereby ensuring that error correction capability is not lowered at the time of variable speed reproduction.
REFERENCES:
patent: 4933784 (1990-06-01), Oldershaw et al.
patent: 5043830 (1991-08-01), Nobuhiro
patent: 5081550 (1992-01-01), Yagisawa et al.
Asato Yoichiro
Chiba Nobuhiro
Koishikawa Yoshinori
Frommer William S.
Garland Steven R.
Sinderbrand Alvin
Smith Jerry
Sony Corporation
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