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US 6,320,710 B1Granted
Tape reproduction apparatus and method
AssigneeNEC Corporation
InventorNobuhiro Ohnishi
Life of this patent
Estimating the term…
Abstract
The present invention enables to preferably correct mark patterns reproduced in parallel from a magnetic tape. A mark detection block 204 successively identifies as one of the plurality mark patterns a plurality of binary data reproduced in parallel from the magnetic tape, and confirms a mark pattern whose reproduction time has reached a reference time. A mark holding block 211 holds a mark pattern whose reproduction is integrated. A mark pattern discontinuity detection block 121 detects a discontinuity and the discontinuity integrating block 213 counts the number of discontinuity times. This discontinuous number of times and the mark pattern held are output together with the confirmed mark pattern, thus correcting the mark pattern appropriately.
Claims13
A magnetic tape reproduction apparatus for reproducing a magnetic tape containing a plurality of binary data constituting various mark patterns which are recorded in parallel on a plurality of data tracks and repeated in serial, the apparatus comprising:
- a tape drive block for linearly moving said tape;
- a data reproduction block for reading the plurality of data tracks in parallel and successively reproducing the binary data from the respective data tracks;
- a mark detection block for successively identifying as a plurality of mark patterns, a plurality of parallel binary data successively reproduced in serial by the data reproduction block, and when a mark pattern is identified, makes the enable signal Hi for the corresponding mark;
- a differentiation circuit provided for each of the mark pattern types so as to detect a rise of the enable signal of a corresponding mark produced from said mark detection block, and outputting a differentiation signal;
- and
- a microprocessor for identifying a mark pattern according to the reproduction time of the enable signal and the output of the differentiation circuit.
3 more elements
A magnetic tape reproduction apparatus comprising:
- a tape drive block for linearly feeding a magnetic tape containing a plurality of binary data constituting various mark patterns which are recorded in parallel on a plurality of data tracks and repeated in serial;
- a data reproduction block for reading the plurality of data tracks in parallel and successively reproducing the binary data from the respective data tracks;
- a mark detection block for successively identifying as a plurality of mark patterns, a plurality of parallel binary data successively reproduced in serial by the data reproduction block;
- a time integrating block for integrating a reproduction time of a mark patterns successively identified by the mark detection block;
- a mark confirmation block for confirming and outputting a mark pattern whose reproduction time integrated by the time integration block has reached a predetermined time;
- a mark pattern holding block for holding a mark pattern identified by the mark detection block;
- a discontinuity detection block for detecting a mark discontinuity of the mark pattern for which a reproduction time is integrated by the time integrating block;
- a discontinuity integrating block for counting the number of times of discontinuity detecting by the discontinuity detecting block;
- and
- a correction output block for outputting the number of times integrated by the integration block and the mark pattern held by the mark holding block together with the mark pattern confirmed by the mark confirmation block.
7 more elements
A magnetic tape reproduction apparatus comprising:
- a tape drive block for linearly feeding a magnetic tape containing a plurality of binary data constituting various mark patterns which are recorded in parallel on a plurality of data tracks and repeated in serial,
- a data reproduction block for reading the plurality of data tracks in parallel and successively reproducing the binary data from the respective data tracks;
- a mark detection block for successively identifying as a plurality of mark patterns, a plurality of parallel binary data successively reproduced in serial by the data reproduction block;
- a time integrating block for integrating a reproduction time of a mark patterns successively identified by the mark detection block;
- a mark confirmation block for confirming and outputting a mark pattern whose reproduction time integrated by the time integration block has reached a predetermined time;
- a change detection block for detecting a change of the mark pattern identified by the mark detection block;
- a pattern accumulating block for successively accumulating the mark pattern identified by the mark detection block together with the reproduction time integrated by the time integration block each time the change detection means detects a change;
- and
- a correction output block for outputting the mark pattern and the reproduction time accumulated by the pattern accumulation block together with the mark pattern confirmed by the mark confirmation block.
6 more elements
A tape reproduction method comprising steps of:
- linearly feeding a magnetic tape having a plurality of binary data on a plurality of data tracks so as to constitute various mark patterns;
- reading in parallel the plurality of data tracks of the magnetic tape;
- successively reproducing the binary data in serial from the plurality of data tracks;
- successively identifying as one of the plurality of mark patterns the binary data reproduced successively;
- integrating the reproduction time of the mark pattern identified;
- confirming the mark pattern for which the integrated reproduction time has reached a predetermined reference time;
- holding the mark pattern identified;
- detecting a discontinuity of the mark pattern for which the reproduction time is integrated;
- integrating the number of the discontinuity times;
- and
- outputting the integrated number of times and the mark pattern held together with the mark pattern confirmed.
8 more elements
A tape reproduction method comprising steps of:
- linearly feeding a magnetic tape having a plurality of binary data on a plurality of data tracks so as to constitute various mark patterns;
- reading in parallel the plurality of data tracks of the magnetic tape;
- successively reproducing the binary data in serial from the plurality of data tracks;
- successively identifying as one of the plurality of mark patterns the binary data reproduced successively;
- integrating the reproduction time of the mark pattern identified;
- confirming the mark pattern for which the integrated reproduction time has reached a predetermined reference time;
- detecting a mark pattern change identified;
- successively accumulating the mark pattern identified, together with the integrated reproduction time;
- and
- outputting the accumulated mark pattern and the reproduction time together with the mark pattern confirmed.
7 more elements
Dependencies are inferred from the claim text.