US 5,353,290 A · Magnetic recorder/reproducer

Abstract

A magnetic recorder/reproducer converts two-channel analog signals into digital signals by a sample-and-hold/A-D converter circuit (3) and controls addresses in a memory circuit (4) by a memory address control circuit (5), to distribute the digital signals into odd sample groups and even sample groups per each channel for arraying the odd sample groups and the even sample groups of the same channel in alternate scanning intervals, thereby to write the same in the memory circuit so that the odd samples and the even samples of the same channel are arrayed in positions separated from each other along the direction of scanning by rotary heads (10, 11). The digital signals thus permutated are modulated by a modulation circuit (7), to be recorded in a magnetic tape by the rotary heads. The digital signals reproduced by the rotary heads are demodulated by a demodulation circuit (14), to be stored in a memory circuit (15). A memory address control circuit (16) controls addresses so as to permutate samples of the reproduced digital signals stored in the memory circuit to be in the original array thereof. The reproduced digital signals read from the memory circuit are converted into analog signals by a D-A converter (18), to be outputted through a low-pass filter (19).

Claims41

Dependent claims

A rotary head type magnetic recording apparatus for recording an ordered input sequence of words represented by digital signals successively input in a unit time in a plurality of diagonal tracks on a recording medium, wherein each of said tracks includes a first region positioned in a longitudinal direction of the track at a former half thereof relative to a central portion of the track, a second region positioned at a latter half of the track relative to the central portion thereof, and a redundant data region,

said first region including a plurality of m subregions ordered from 0 to m-1 in an arrangement starting from one edge of the track to the center of the track, said second region including m subregions ordered from 0 to m-1 in an arrangement starting from the center of the track to the other edge thereof, and said redundant data region including redundant data for error correction or error detection of the digital signals representing words recorded in said first and second regions on the same track with said redundant data,
wherein said digital signals are recorded such that a plurality of words are arranged in each said subregion, said magnetic recording apparatus comprising:
recording signal processing means for arranging said digital signals input in the unit time to be recorded in first and second tracks, and for:
recording a first word group on the first region of said first track, a first word of said first word group having an input order of 0, said first word group including words having an order of 4n in the input sequence, where n is an integer 0, 1, 2, . . . ,
or recording a second word group on the first region of said second track, said second word group including words having an order of 4n+1 in the input sequence,
for recording a third word group on the second region of said second track, said third word group including words having an order of 4n+2 in the input sequence, and
for recording a fourth word group on the second region of said first track, said fourth word group including words having an order of 4n+3 in the input sequence,
said recording signal processing means supplying said digital signals such that, in each region, words of each said recorded word group are arranged on the 0th to m-1th subregions in a common ordering sequence with respect to the input order thereof, and
redundant data generating means for generating redundant data for error correction or error detection of the digital signals representing words to be recorded on the same track with said redundant data.

6 more elements

A rotary head type magnetic reproducing apparatus for reproducing digital signals by scanning diagonal tracks formed on a recording medium,

each of said tracks including a first region positioned in a longitudinal direction of the track at a former half thereof relative to a central portion of the track, a second region positioned at a latter half of the track relative to the central portion thereof, and a redundant data region,
said first region including a plurality of m subregions ordered from 0 to m-1 in an arrangement starting from one edge of the track to the center of the track, said second region including m subregions ordered from 0 to m-1 in an arrangement starting from the center of the track to the other edge thereof, and said redundant data region including redundant data for error correction or error detection of the digital signals representing words recorded in said first and second regions on the same track with said redundant data, wherein a plurality of words are previously recorded in each subregion, and signals are outputted from the subregions in a prescribed order,
said rotary head type magnetic reproducing apparatus reproducing digital signals of a unit time dispersed among respective regions of first and second tracks, comprising:
signal reproducing and processing means for receiving as inputs the digital signals reproduced by scanning said tracks, for rearranging said reproduced digital signals and for outputting an ordered output sequence of words using digital signals reproduced from said first and second tracks as a unit,
said signal reproducing and processing means including means for:
reproducing a first word group from the first region of said first track, said first word group including words having an order of 4n in the output sequence, where n is an integer 0, 1, 2, . . . , a first word of said first word group having an output order of 0;
for reproducing a second word group from the first region of said second track, said second word group including words having an order of 4n+1 in the output sequence;
for reproducing a third word group from the second region of said second track, said third word group including words having an order of 4n+2 in the output sequence;
and
for reproducing a fourth word group from the second region of said first track, said fourth word group including words having an order of 4n+3 in the output sequence,
means for rearranging each of the corresponding words from each of said subregions in a common rearranging and reordering sequence thereby to output said words in said ordered output sequence, and
decoding means for correcting erroneous signals from a track of the recording medium in accordance with the redundant data recorded on the same track therewith.

9 more elements

A rotary head type magnetic recording and reproducing apparatus for recording an ordered input sequence of words represented by digital signals successively input in a unit time in a plurality of diagonal tracks on a recording medium and for reproducing digital signals by scanning diagonal tracks formed on a recording medium,

wherein each of said tracks includes a first region positioned in a longitudinal direction of the track at a former half thereof relative to a central portion of the track, a second region positioned at a latter half of the track relative to the central portion thereof, and a redundant data region,
said first region including a plurality of m subregions ordered from 0 to m-1 in an arrangement starting from one edge of the track to the center of the track, said second region including m subregions ordered from 0 to m-1 in an arrangement starting from the center of the track to the other edge thereof, and said redundant data region including redundant data for error correction or error detection of the digital signals representing words recorded in said first and second regions on the same track with said redundant data, wherein said digital signals are recorded such that a plurality of words are arranged in each said subregion, said magnetic recording apparatus comprising:
recording signal processing means for arranging said digital signals input in the unit time to be recorded in first and second tracks, and for:
recording a first word group on the first region of said first track, a first word of said first word group having an input order of 0, said first word group including words having an order of 4n in the input sequence, where n is an integer 0, 1, 2, . . . ,
for recording a second word group on the first region of said second track, said second word group including words having an order of 4n+1 in the input sequence,
for recording a third word group on the second region of said second track, said third word group including words having an order of 4n+2 in the input sequence, and
for recording a fourth word group on the second region of said first track, said fourth word group including words having an order of 4n+3 in the input sequence,
said recording signal processing means supplying said digital signals such that, in each region, words of each said recorded word group are arranged on the 0th to m-1th subregions in a common ordering sequence with respect to the input order thereof, and
redundant data generating means for generating redundant data for error correction or error detection of the digital signals representing words to be recorded on the same track with said redundant data.

6 more elements

A method for recording in a plurality of diagonal tracks on a recording medium an ordered input sequence of words using a rotary head type magnetic recording apparatus, said words represented by digital signals successively input in a unit time, wherein each of said tracks includes a first region positioned in a longitudinal direction of the track at a former half thereof relative to a central portion of the track, a second region positioned at a latter half of the track relative to the central portion thereof, and a redundant data region, comprising the steps of:

defining a plurality of m subregions from 0 to m-1 in said first region in an arrangement starting from one edge of the track to the center of the track, defining a plurality of m subregions from 0 to m-1 in said second region in an arrangement starting from the center of the track to the other edge thereof, defining said redundant data region to include redundant data for error correction or error detection of the digital signals representing words recorded in said first and second regions on the same track with said redundant data, and recording said digital signals such that a plurality of words are arranged in each said subregion,
said recording step including arranging said digital signals input in the unit time to be recorded in first and second tracks, and:
recording a first word group on the first region of said first track, said first word group including words having an order of 4n in the input sequence, where n is an integer 0, 1, 2, . . . , a first word of said first word group having an input order of 0;
recording a second word group on the first region of said second track, said second word group including words having an order of 4n+1 in the input sequence;
recording a third word group on the second region of said second track, said third word group including words having an order of 4n+2 in the input sequence;
recording a fourth word group on the second region of said first track, said fourth word group including words having an order of 4n+3 in the input sequence,
in each region, arranging words of each said recorded word group on the 0th to m-1th subregions in a common ordering sequence with respect to the input order thereof, and
recording redundant data in said redundant data region for error correction or error detection of the digital signals representing words recorded on the same track with said redundant data.

5 more elements

A method for reproducing digital signals by scanning diagonal tracks formed on a recording medium using a rotary head type magnetic reproducing apparatus, wherein each of said tracks includes a first region positioned in a longitudinal direction of the track at a former half thereof relative to a central portion of the track, a second region positioned at a latter half of the track relative to the central portion thereof, and a redundant data region,

said first region including a plurality of m subregions ordered from 0 to m-1 in an arrangement starting from one edge of the track to the center of the track, said second region including m subregions ordered from 0 to m-1 in an arrangement starting from the center of the track to the other edge thereof, and said redundant data region including redundant data for error correction or error detection of the digital signals representing words recorded in said first and second regions on the same track with said redundant data, a plurality of words being previously recorded in each subregion, the method comprising:
outputting signals from the subregions in a prescribed order by using said rotary head type magnetic reproducing apparatus for reproducing digital signals of a unit time dispersed among respective regions of first and second tracks,
said reproducing step including rearranging said reproduced digital signals for outputting an ordered output sequence of words using digital signals reproduced from said first and second tracks as a unit,
said rearranging step including reproducing a first word group from the first region of said first track, providing to words in said first word group an order of 4n in the output sequence, where n is an integer 0, 1, 2, . . . , and providing to a first word of said first word group an output order of 0;
reproducing a second word group from the first region of said second track,
providing to words in said second word group an order of 4n+1 in the output sequence,
reproducing a third word group from the second region of said second track,
providing to words in said third word group an order of 4n+2 in the output sequence,
reproducing a fourth word group from the second region of said first track,
providing to words in said fourth word group an order of 4n+3 in the output sequence,
rearranging each of the corresponding words from each of said subregions in a common rearranging and reordering sequence thereby to output said words in said ordered output sequence, and
correcting erroneous signals from a track of the recording medium in accordance with the redundant data recorded on the same track therewith.

9 more elements

A magnetic tape wherein magnetic patterns corresponding to digital signals are arrayed on a plurality of different tracks, said magnetic tape defining a scanning direction substantially perpendicular to a travel direction thereof and including:

a record pattern wherein an ordered input sequence of words represented by digital signals successively input in a unit time are represented by magnetic word patterns arrayed in a plurality of diagonal tracks on the tape, wherein each of said tracks includes a first region positioned in a longitudinal direction of the track at a former half thereof relative to a central portion of the track and a second region positioned at a latter half of the track relative to the central portion thereof,
said first region including a plurality of m subregions ordered from 0 to m-1 in an arrangement starting from one edge of the track to the center of the track, and said second region including m subregions ordered from 0 to m-1 in an arrangement starting from the center of the track to the other edge thereof,
wherein a plurality of magnetic word patterns are arranged in each of said subregions,
magnetic word patterns corresponding to digital signals input in the unit time are positioned in first and second tracks,
a magnetic pattern corresponding to a first word group is positioned on the first region of said first track, a magnetic word pattern corresponding to a first word of said first word group having an input order of 0, said first word group pattern including magnetic word patterns corresponding to words having an order of 4n in the input sequence, where n is an integer 0, 1, 2, . . . ,
a magnetic pattern corresponding to a second word group is positioned on the first region of said second track, said second word group pattern including magnetic word patterns corresponding to words having an order of 4n+1 in the input sequence,
a magnetic pattern corresponding to a third word group is positioned on the second region of said second track, said third word group pattern including magnetic word patterns corresponding to words having an order of 4n+2 in the input sequence, and
a magnetic pattern corresponding to a fourth word group is positioned on the second region of said first track, said fourth word group pattern including magnetic word patterns corresponding to words having an order of 4n+3 in the input sequence,
in each region, magnetic word patterns of each said word group pattern being arranged on the 0th to m-1th subregions in a common ordering sequence with respect to the input order thereof.

6 more elements

a record pattern wherein an ordered input sequence of words represented by digital signals successively input in a unit time are represented by magnetic word patterns arrayed in a plurality of diagonal tracks on the tape, wherein each of said tracks includes a first region positioned in a longitudinal direction of the track at a former half thereof relative to a central portion of the track, a second region positioned at a latter half of the track relative to the central portion thereof, and a redundant data region,
said first region including a plurality of m subregions ordered from 0 to m-1 in an arrangement starting from one edge of the track to the center of the track, said second region including m subregions ordered from 0 to m-1 in an arrangement starting from the center of the track to the other edge thereof, and said redundant data region including a redundant data magnetic pattern for error correction or error detection of the digital signals representing words recorded as magnetic word patterns in said first and second regions on the same track with said redundant data magnetic pattern,
wherein a plurality of magnetic word patterns are arranged in each of said subregions,
magnetic word patterns corresponding to digital signals input in the unit time are positioned in first and second tracks,
a magnetic pattern corresponding to a first word group is positioned on the first region of said first track, a magnetic word pattern corresponding to a first word of said first word group having an input order of 0, said first word group pattern including magnetic word patterns corresponding to words having an order of 4n in the input sequence, where n is an integer 0, 1, 2, . . . ,
a magnetic pattern corresponding to a second word group is positioned on the first region of said second track, said second word group pattern including magnetic word patterns corresponding to words having an order of 4n+1 in the input sequence,
a magnetic pattern corresponding to a third word group is positioned on the second region of said second track, said third word group pattern including magnetic word patterns corresponding to words having an order of 4n+2 in the input sequence, and
a magnetic pattern corresponding to a fourth word group is positioned on the second region of said first track, said fourth word group pattern including magnetic word patterns corresponding to words having an order of 4n+3 in the input sequence,
in each region, magnetic word patterns of each said word group pattern being arranged on the 0th to m-1th subregions in a common ordering sequence with respect to the input order thereof.

6 more elements

Dependencies are inferred from the claim text.

Magnetic recorder/reproducer

Life of this patent

Magnetic recorder/reproducer

Life of this patent

Abstract

Claims41