Magnetic tape reading apparatus and a magnetic tape reading method
A magnetic tape reading apparatus includes a reading element unit which includes: a plurality of reading elements which are disposed in a state of being adjacent to each other and each of which reads data by a linear scanning method from a specific track region including a reading target track in a track region included in a magnetic tape; and an extraction unit which performs a waveform equalization process according to a deviation amount between positions of the magnetic tape and the reading element unit, with respect to each reading result for each reading element, to extract data derived from the reading target track from the reading result.
1. A magnetic tape reading apparatus comprising:
a reading element unit which includes a plurality of reading elements which are disposed in a state of being adjacent to each other and each of which reads data by a linear scanning method from a specific track region including a reading target track in a track region included in a magnetic tape; and
an extraction unit which performs a waveform equalization process according to a deviation amount between positions of the magnetic tape and the reading element unit, with respect to each reading result for each reading element, to extract data derived from the reading target track from the reading result,
wherein parts of the plurality of reading elements are overlapped each other in a running direction of the magnetic tape.
2. The magnetic tape reading apparatus according to claim 1 ,
wherein the specific track region is a region including the reading target track and adjacent tracks which are adjacent to the reading target track, and
each of the plurality of reading elements straddles over both of the reading target track and the adjacent track, in a case where a positional relationship with the magnetic tape is changed.
3. The magnetic tape reading apparatus according to claim 1 ,
wherein the plurality of reading elements are disposed in a line in a state of being adjacent to each other, in a width direction of the magnetic tape.
4. The magnetic tape reading apparatus according to claim 1 ,
wherein the plurality of reading elements fall in the reading target track in the width direction of the magnetic tape.
5. The magnetic tape reading apparatus according to claim 1 ,
wherein the deviation amount is determined in accordance with a result obtained by reading a servo pattern applied to the magnetic tape in advance, by a servo element.
6. The magnetic tape reading apparatus according to claim 5 ,
wherein the reading operation by the reading element unit is performed synchronously with the reading operation by the servo element.
7. The magnetic tape reading apparatus according to claim 1 ,
wherein the extraction unit includes a two-dimensional FIR filter, and
the two-dimensional FIR filter composes each result obtained by performing the waveform equalization process with respect to each reading result for each reading element, to extract data derived from the reading target track from the reading result.
8. The magnetic tape reading apparatus according to claim 1 ,
wherein the plurality of reading elements are a pair of reading elements.
9. A magnetic tape reading apparatus comprising:
a reading element unit which includes a plurality of reading elements which are disposed in a state of being adjacent to each other and each of which reads data by a linear scanning method from a specific track region including a reading target track in a track region included in a magnetic tape; and
an extraction unit which performs a waveform equalization process according to a deviation amount between positions of the magnetic tape and the reading element unit, with respect to each reading result for each reading element, to extract data derived from the reading target track from the reading result,
wherein a tap coefficient used in the waveform equalization process is determined in accordance with the deviation amount.
10. The magnetic tape reading apparatus according to claim 9 ,
wherein, regarding each of the plurality of reading elements, a ratio between an overlapping region with the reading target track and an overlapping region with the adjacent track which is adjacent to the reading target track is specified from the deviation amount, and the tap coefficient is determined in accordance with the specified ratio.
11. A magnetic tape reading apparatus comprising:
a plurality of reading element units each of which includes a plurality of reading elements which are disposed in a state of being adjacent to each other and each of which reads data by a linear scanning method from each of a plurality of specific track regions including each of reading target tracks in a track region included in a magnetic tape; and
an extraction unit which performs a waveform equalization process according to a deviation amount between positions of the magnetic tape and the reading element unit, with respect to each reading result for each reading element, regarding each of the plurality of reading element units, to extract data derived from the reading target track from the reading result,
wherein parts of the plurality of reading elements are overlapped each other in a running direction of the magnetic tape.
12. A magnetic tape reading method comprising:
disposing a reading element unit including a plurality of reading elements in a state where the plurality of reading elements are adjacent to each other;
causing the plurality of reading elements to read data by a linear scanning method from a specific track region including a reading target track in a track region included in a magnetic tape; and
causing an extraction unit to perform a waveform equalization process according to a deviation amount between positions of the magnetic tape and the reading element unit, with respect to each reading result for each reading element, to extract data derived from the reading target track from the reading result,
wherein parts of the plurality of reading elements are overlapped each other in a running direction of the magnetic tape.