Patent EP0387882A2 successfully refreshed from Google Patents.
EP0387882A2
Expired / Lapsed
EP
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Magnetic recorder/reproducer for recording digital signal on a plurality of tracks of magnetic recording media and reproducing the same
Assignee: Sharp Corp
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Filing: 1990-03-15
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Granted: —
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Expires: 2010-03-15
Abstract
Abstract A magnetic recording and reproducing apparatus for recording digital signals of a plurality of channels on tracks on magnetic recording medium and reproducing the same. The apparatus includes an A/D converter (90) for converting analog video signals to digital signals, a signal dividing circuit (12) for dividing the digital signals into first and second digital signals having first and second bit numbers for each channel, signal permuting circuit (3, 8, 9) for permuting the first and second digital signals of the same channel so as to be recorded on different tracks separately, a magnetic head (14, 15) for recording the permuted first and second digital signals on the different tracks and separately reproducing the same, a signal generating circuit (4, 8, 9, 12) for generating digital signals having a predetermined bit number based on the reproduced first and second digital signals, and a D/A converter (11) for converting generated digital signals into analog signals. The externally applied digital signals are divided into signals of a higher and lower bit groups by the signal dividing circuit (12). The divided higher and lower bit group signals are permuted and recorded on the separate tracks. The recorded higher and lower bit group signals are separately reproduced. The separately reproduced higher and lower bit group signals are selected by the signal generating circuit (8, 9, 12), permuted once again and outputted as the original digital signals. The digital signals are converted into analog signals and supplied to other video equipments.
Inventors
- 👤 Hiroshi Teshima Haitsu 1279-2 Ii
- 👤 Yukihiko Haikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 19:01
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N5/937; G; G11; G11B; G11B15/00; G11B15/18; G11B15/1808; G11B15/1875; G11B20/00; G11B20/10; G11B27/00; G11B27/10; G11B27/102; G11B27/107; G11B5/00; G11B5/008; G11B5/00813; G11B5/00847; G11B5/0086; G11B5/02; G11B5/09; H04N5/92; H04N5/926; G11B2220/00; G11B2220/90; G11B2220/91; G11B2220/913
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
153 words
A magnetic recording apparatus for recording signals of a plurality of channels on a plurality of tracks on magnetic recording medium (1), comprising: converting means (90) for converting said signals of said plurality of channels into digital signals having a predetermined number of bits, signal dividing means (12) for dividing said signals of said plurality of channels converted into the digital signals by said converting means (90) into signals of a higher bit group and signals of a lower bit group for each of said channels, signal permuting means (8, 9) for permuting said higher bit group signals and said lower bit group signals so that said higher bit group signals and said lower bit group signals of the same channel are recorded on said separate tracks, magnetic means (14, 15 for recording said permuted higher bit group signals and lower bit group signals on said separate tracks on said magnetic recording medium.
Claim 2
Dependent Claim
153 words
A magnetic recording apparatus for recording signals of a plurality of channels on a plurality of tracks on magnetic recording medium (1), comprising: converting means (90) for converting said signals of said plurality of channels into digital signals having a predetermined number of bits, signal dividing means (12) for dividing said signals of said plurality of channels converted into the digital signals by said converting means (90) into signals of a higher bit group and signals of a lower bit group for each of said channels, signal permuting means (8, 9) for permuting said higher bit group signals and said lower bit group signals so that said higher bit group signals and said lower bit group signals of the same channel are recorded on said separate tracks, magnetic means (14, 15 for recording said permuted higher bit group signals and lower bit group signals on said separate tracks on said magnetic recording medium.
Claim 3
Dependent Claim
26 words
A magnetic recording apparatus according to claim 1, wherein said higher bit group signals and said lower bit group signals have the same number of bits.
Claim 4
Dependent Claim
95 words
A magnetic recording apparatus according to claim 2, wherein each of said signals of said plurality of channels includes first and second channel signals (d4, d5), said signal permuting means (8, 9) includes arraying means (9) for arraying said higher bit group signals and lower bit group signals of said first and second channel signals so that said first bit group signals and lower bit group signals of said first channel signals and said higher bit group signals and lower bit group signals of said second channel signals are respectively recorded on said separate tracks.
Claim 5
Dependent Claim
120 words
A magnetic recording apparatus according to claim 3, wherein said arraying means (9) comprises: first memory means (48) for storing succession of said higher bit group signals divided by said signal dividing means (12) in successive positions, second memory means (49) for storing succession of said lower bit group signals divided by said signal dividing means (12) in other successive positions, alternate reading means (44) for reading said higher bit group signals stored in said first memory means (48) and said lower bit group signals stored in said second memory means (49) alternately, in synchronization with a recording of signals on said track by said magnetic means (14, 15) and for supplying the same to said magnetic means (14, 15).
Claim 6
Dependent Claim
155 words
A magnetic reproducing apparatus for reproducing signals of a plurality of channels recorded on a plurality of tracks on magnetic recording medium (1), wherein said plurality of tracks include a first track (T1) and a second track (T2), said first track (T1) records first digital signals having a predetermined first number of bits, said second track (T2) records second digital signals having a predetermined second number of bits, and said apparatus comprising: magnetic means (14, 15) for separately reproducing said first digital signal recorded on said first track (T1) and said second digital signal recorded on said second track (T2), first signal generating means (4, 8, 9, 12) for generating digital signals having a third number of bits different from said first and second number of bits based on said reproduced first and second digital signals, and converting means (11) for converting said generated digital signals having the third number of bits into analog signals.
Claim 7
Dependent Claim
155 words
A magnetic reproducing apparatus for reproducing signals of a plurality of channels recorded on a plurality of tracks on magnetic recording medium (1), wherein said plurality of tracks include a first track (T1) and a second track (T2), said first track (T1) records first digital signals having a predetermined first number of bits, said second track (T2) records second digital signals having a predetermined second number of bits, and said apparatus comprising: magnetic means (14, 15) for separately reproducing said first digital signal recorded on said first track (T1) and said second digital signal recorded on said second track (T2), first signal generating means (4, 8, 9, 12) for generating digital signals having a third number of bits different from said first and second number of bits based on said reproduced first and second digital signals, and converting means (11) for converting said generated digital signals having the third number of bits into analog signals.
Claim 8
Dependent Claim
23 words
A magnetic reproducing apparatus according to claim 5, wherein said first bit number and said second bit number are equal to each other.
Claim 9
Dependent Claim
28 words
A magnetic reproducing apparatus according to claim 6, wherein said third bit number is equal to the sum of said first bit number and said second bit number.
Claim 10
Dependent Claim
46 words
A magnetic reproducing apparatus according to claim 7, wherein said first signal generating means (4, 8, 9, 12) comprises arraying means (8, 9) for alternately arraying said first digital signals and said second digital signals and for outputting said digital signals having said third bit number.
Claim 11
Dependent Claim
42 words
A magnetic reproducing apparatus according to claim 8, wherein said first signal generating means (4, 8, 9, 12) further comprises bit number converting means (54, 55, 56) for converting the bit number of said first digital signals into said third bit number.
Claim 12
Dependent Claim
82 words
A magnetic reproducing apparatus according to claim 9, wherein said first signal generating (4, 8, 9, 12) means further comprises selecting means adapted to receive predetermined selecting signals for selecting either said arraying means (8, 9) or said bit number converting means (54, 55) and responsive to said selecting means for selecting either an output of said arraying means (8, 9) or an output of said bit number converting means (54, 55 and for applying the same to said converting means (11).
Claim 13
Dependent Claim
82 words
A magnetic reproducing apparatus according to claim 8, wherein said arraying means (9) comprises: first memory means (48) for storing succession of said first digital signals in successive positions, second memory means (49) for storing succession of said second digital signals in other successive positions, and alternate reading means (54, 55, 56) for alternately reading the contents of said first memory means (48) and the contents of said second memory means (49) to output said digital signals having said third bit number.
Claim 14
Dependent Claim
68 words
A magnetic reproducing apparatus according to claim 9, wherein said bit number converting means (54, 55, 56) comprises: memory means (54, 55) for storing succession of said first digital signals in successive positions, bit adding means (56) for sequentially reading succession of said stored first digital signals and for adding said predetermined digital signals having said second number of bits to higher bits of said first digital signals.
Claim 15
Dependent Claim
64 words
A magnetic reproducing apparatus according to claim 5, wherein said plurality of tracks further include third and fourth tracks (T3, T4), said third track (T3) recording third digital signals having said first number of bits, said fourth track (T4) recording fourth digital signals having said second number of bits, and said magnetic means (14, 15) further reproduces said third and fourth digital signals individually.
Claim 16
Dependent Claim
41 words
A magnetic reproducing apparatus according to claim 13, further comprising second signal generating means (8, 9) for generating digital signals having said third number of bits, based on said third and fourth digital signals reproduced by said magnetic means (14, 15).
Claim 17
Dependent Claim
46 words
A magnetic reproducing apparatus according to claim 14, wherein said first signal generating means (4, 8, 9, 12) comprises first arraying means (8) for alternately arraying said first digital signals and said second digital signals and for outputting digital signals having said third number of bits.
Claim 18
Dependent Claim
42 words
A magnetic reproducing apparatus according to claim 15, wherein said second signal generating means comprises second arraying means (9) for alternately arraying said third digital signals and said fourth digital signals and for outputting digital signals having said third number of bits.
Claim 19
Dependent Claim
73 words
A magnetic reproducing apparatus according to claim 16, further comprising switching means (10) for selecting an output of said second arraying means (9) when said magnetic means (14, 15) reproduces said first and second tracks (T1 and T2), and for selecting an output of said first arraying means (8) when said magnetic means (14, 15) reproduces said third and fourth tracks (T3, T4), and for applying the same to said converting means (11).
Claim 20
Dependent Claim
68 words
A magnetic reproducing apparatus according to claim 16, wherein said second signal reproducing means (9) further comprises: first bit number converting means (54) for converting the bit number of said first digital signal (S1) into said third bit number, first selecting means for selecting either the output of said first arraying means (8) or the output of said first bit number converting means and for outputting the same.
Claim 21
Dependent Claim
64 words
A magnetic reproducing apparatus according to claim 18, wherein said second signal generating means further comprises: second bit number converting means for converting the bit number of said third digital signal into said third bit number, second selecting means for selecting either the output of said second arraying means or the output of said second bit number converting means and for outputting the same.
Claim 22
Dependent Claim
63 words
A magnetic reproducing apparatus according to claim 19, further comprising switching means for selecting an output of said second selecting means when said magnetic means (1) reproduces said first and second tracks (T1, T2) and for selecting an output of said first selecting means when said magnetic means reproduces said third and second tracks and for applying the same to said converting means.
Claim 23
Dependent Claim
247 words
A magnetic recording and reproducing apparatus for recording signals of a plurality of channels on a plurality of tracks on magnetic recording medium (1) and reproducing said signals of the plurality of channels from said tracks, comprising: first converting means (90) for converting said signals of the plurality of channels into digital signals having a predetermined bit number, signal dividing means (56) for dividing said signals of the plurality of channels converted into the digital signals by said first converting means (90) into first digital signals having a predetermined first bit number and second digital signals having a predetermined second bit number for each of said channels, signal permuting means (8, 9) for permuting said first digital signals and said second digital signals so that said first digital signals and said second digital signals of the same channel are recorded on said separate tracks, magnetic means (14, 15) for recording said permuted first digital signals and second digital signals on said separate tracks on said magnetic recording medium (1) and for separately reproducing said first digital signals and said second digital signals recorded on said separate tracks, first signal generating means (2, 8, 9, 12) for generating digital signals having said predetermined bit number, based on said first and second digital signals reproduced by said magnetic means (14, 15), second converting means (11) for converting said digital signals having said predetermined bit number outputted from said first signal generating means (2, 8, 9, 12) into analog signals.
Claim 24
Dependent Claim
247 words
A magnetic recording and reproducing apparatus for recording signals of a plurality of channels on a plurality of tracks on magnetic recording medium (1) and reproducing said signals of the plurality of channels from said tracks, comprising: first converting means (90) for converting said signals of the plurality of channels into digital signals having a predetermined bit number, signal dividing means (56) for dividing said signals of the plurality of channels converted into the digital signals by said first converting means (90) into first digital signals having a predetermined first bit number and second digital signals having a predetermined second bit number for each of said channels, signal permuting means (8, 9) for permuting said first digital signals and said second digital signals so that said first digital signals and said second digital signals of the same channel are recorded on said separate tracks, magnetic means (14, 15) for recording said permuted first digital signals and second digital signals on said separate tracks on said magnetic recording medium (1) and for separately reproducing said first digital signals and said second digital signals recorded on said separate tracks, first signal generating means (2, 8, 9, 12) for generating digital signals having said predetermined bit number, based on said first and second digital signals reproduced by said magnetic means (14, 15), second converting means (11) for converting said digital signals having said predetermined bit number outputted from said first signal generating means (2, 8, 9, 12) into analog signals.
Claim 25
Dependent Claim
110 words
A magnetic recording method of recording digital signals of a plurality of channels having a predetermined bit number on a plurality of tracks on magnetic recording medium comprising the steps of: dividing said digital signals having the predetermined bit number into higher bit group signals and lower bit group signals for each of said channels, permuting said higher bit group signals and said lower bit group signals so that said higher bit group signals and said lower bit group signals of the same channel are recorded on said separate tracks, recording said permuted higher bit group signals and lower bit group signals on said separate tracks on said recording medium.
Claim 26
Dependent Claim
110 words
A magnetic recording method of recording digital signals of a plurality of channels having a predetermined bit number on a plurality of tracks on magnetic recording medium comprising the steps of: dividing said digital signals having the predetermined bit number into higher bit group signals and lower bit group signals for each of said channels, permuting said higher bit group signals and said lower bit group signals so that said higher bit group signals and said lower bit group signals of the same channel are recorded on said separate tracks, recording said permuted higher bit group signals and lower bit group signals on said separate tracks on said recording medium.
Claim 27
Dependent Claim
25 words
A magnetic recording method according to claim 22, wherein said higher bit group signals and said lower bit group signals have the same bit number.
Claim 28
Dependent Claim
133 words
A magnetic reproducing method of reproducing digital signals of a plurality of channels recorded on a plurality of tracks on magnetic recording medium, said plurality of tracks including a first track and a second track, said first track recording first digital signals having a first predetermined number of bits, said second track recording second digital signals having a second predetermined number of bits, said method comprising the steps of: separately reproducing said first digital signals recorded on said first track and said second digital signals recorded on said second track, generating digital signals having a third number of bits different from said first bit number and second bit number, based on said reproduced first digital signals and second digital signals, converting said generated signals having the third number of bits into analog signals.
Claim 29
Dependent Claim
133 words
A magnetic reproducing method of reproducing digital signals of a plurality of channels recorded on a plurality of tracks on magnetic recording medium, said plurality of tracks including a first track and a second track, said first track recording first digital signals having a first predetermined number of bits, said second track recording second digital signals having a second predetermined number of bits, said method comprising the steps of: separately reproducing said first digital signals recorded on said first track and said second digital signals recorded on said second track, generating digital signals having a third number of bits different from said first bit number and second bit number, based on said reproduced first digital signals and second digital signals, converting said generated signals having the third number of bits into analog signals.
Claim 30
Dependent Claim
38 words
A magnetic reproducing method according to claim 24, wherein said signal generating step comprises a step of outputting digital signals having said third number of bits by alternately arraying said first digital signals and said second digital signals.
Claim 31
Dependent Claim
32 words
A magnetic reproducing method according to claim 25, wherein said signal generating step further comprises a step of converting the bit number of said first digital signals into said third bit number.
Claim 32
Dependent Claim
55 words
A magnetic reproducing method according to claim 26, wherein said signal generating step further comprises a step of selecting either of said digital signals having said third number bits arrayed in said arraying step or said first digital signals with the bit number converted into said third bit number by said bit number converting step.
Claim 33
Dependent Claim
163 words
A magnetic recording and reproducing method of recording digital signal of a plurality of channels having a predetermined bit number on a plurality of tracks on magnetic recording medium and reproducing said signals of the plurality of channels from said tracks, comprising the steps of: dividing said digital signals into first digital signals having a predetermined first number of bits and second digital signals having a predetermined second number of bits for each of said channels, permuting said first and second digital signals so that said first and second digital signals of the same channel are recorded on said separate tracks, recording said permuted first and second digital signals on said separate tracks on said magnetic recording medium, separately reproducing said first and second digital signals recorded on said separate tracks, generating digital signals having said predetermined number of bits, based on said reproduced first and second digital signals, converting said generated digital signals having the predetermined number of bits into analog signals.
Claim 34
Dependent Claim
163 words
A magnetic recording and reproducing method of recording digital signal of a plurality of channels having a predetermined bit number on a plurality of tracks on magnetic recording medium and reproducing said signals of the plurality of channels from said tracks, comprising the steps of: dividing said digital signals into first digital signals having a predetermined first number of bits and second digital signals having a predetermined second number of bits for each of said channels, permuting said first and second digital signals so that said first and second digital signals of the same channel are recorded on said separate tracks, recording said permuted first and second digital signals on said separate tracks on said magnetic recording medium, separately reproducing said first and second digital signals recorded on said separate tracks, generating digital signals having said predetermined number of bits, based on said reproduced first and second digital signals, converting said generated digital signals having the predetermined number of bits into analog signals.
References Cited (Backward Citations)
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