US4905100A
Expired / Lapsed
US
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Magnetic recorder/reproducer
Assignee: Mitsubishi Electric Corp
•
Filing: 1988-06-30
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Granted: 1990-02-27
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Expires: 2008-06-30
Abstract
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).
Inventors
- 👤 Kazuhito Endo
- 👤 Masayuki Ishida
- 👤 Yoshinobu Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:20
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1876; G11B20/10527; G11B20/1806; G11B20/1809
Claims Analysis
Total Claims: 66
Claim 1
Independent Claim
209 words
A magnetic recorder comprising recording means including a plurality of rotary heads (10,11) for performing helical scanning to produce a recording in the form of a plurality of tracks, the recorder further comprising signal processing means (4,5) for providing to the recording means digital signals comprising odd and even samples of at least one channel for enabling interleaved recording of said digital signals in such a way that the odd and even samples of said channel are recorded in different tracks and that sequentially occurring odd and even samples are separated in a direction defined along the length of the tracks, wherein the signal processing means (4,5) is structured for providing the digital signals of a plurality of channels in such a manner that, for each channel, the odd samples are recorded in a group in a region of one track, and the even samples are recorded in a group in a region of a different track, the region of said different track containing the even samples occupying a portion of the length of said different track which excludes a portion of said different track corresponding in location to a portion of the length of said one track occupied by the region in which the odd samples are recorded.
Claim 2
Dependent Claim
209 words
A magnetic recorder comprising recording means including a plurality of rotary heads (10,11) for performing helical scanning to produce a recording in the form of a plurality of tracks, the recorder further comprising signal processing means (4,5) for providing to the recording means digital signals comprising odd and even samples of at least one channel for enabling interleaved recording of said digital signals in such a way that the odd and even samples of said channel are recorded in different tracks and that sequentially occurring odd and even samples are separated in a direction defined along the length of the tracks, wherein the signal processing means (4,5) is structured for providing the digital signals of a plurality of channels in such a manner that, for each channel, the odd samples are recorded in a group in a region of one track, and the even samples are recorded in a group in a region of a different track, the region of said different track containing the even samples occupying a portion of the length of said different track which excludes a portion of said different track corresponding in location to a portion of the length of said one track occupied by the region in which the odd samples are recorded.
Claim 3
Dependent Claim
154 words
A magnetic recorder in accordance with claim 1, wherein each track has at least first and second regions, and said signal processing means (4,5) is structured for providing the digital signals in such a manner that one of the even samples and the odd samples of a first channel are recorded in a group in the first region of the first of a pair of tracks, and one of the even samples or the odd samples, respectively, of a second channel are recorded in a group in the second region of said first track, and the other of the even samples and the odd samples of said second channel are recorded in a group in the first region of a second of a pair of tracks and the other of the even samples and the odd samples of said first channel are recorded in a group in the second region of said second track.
Claim 4
Dependent Claim
66 words
A magnetic recorder in accordance with claim 2, wherein said signal processing means (4,5) is structured for recording said even samples of said first channel and said odd samples of said second channel on one of the first and second tracks and said odd samples of said first channel and said even samples of said second channel on the other of said first and second tracks.
Claim 5
Dependent Claim
68 words
A magnetic recorder in accordance with claim 2, wherein said signal processing means (4,5) is structured for recording said even samples of said first channel and said even samples of said second channel on one of said first and second tracks and for recording said odd samples of said first channel and said odd samples of said second channel on the other of said first and second tracks.
Claim 6
Dependent Claim
43 words
A magnetic recorder in accordance with any one of claims 3 and 4, wherein the signal processing means (4,5) is structured for containing all the samples of said first and second channels for a predetermined time period in said first and second tracks.
Claim 7
Dependent Claim
26 words
A magnetic recorder in accordance with claim 5, wherein each track comprises first and second sequentially occurring halves, respectively, including therein said first and second regions.
Claim 8
Dependent Claim
17 words
A magnetic recorder in accordance with claim 6, wherein said first and second tracks are adjacent tracks.
Claim 9
Dependent Claim
34 words
A magnetic recorder according to claim 7, wherein said signal processing means (4,5) comprises further means for recording said even samples and odd samples, for each channel, in alternate tracks of a magnetic tape.
Claim 10
Dependent Claim
36 words
A magnetic recorder in accordance with claim 8, wherein the respective regions of the tracks in which said odd samples and said even samples are recorded all have the same length along the respective track thereof.
Claim 11
Dependent Claim
20 words
A magnetic recorder in accordance with claim 9, wherein said recorder comprises means for recording two channels of digital signals.
Claim 12
Dependent Claim
47 words
A magnetic recorder in accordance with claim 10, including means (6) for generating a redundancy signal for error correction or error detection from the digital signals, said signal processing means (4,5) also being structured for providing the redundancy signal to the recording means for recording the same.
Claim 13
Dependent Claim
36 words
A magnetic recorder in accordance with claim 11, wherein said signal processing means is further structured for causing said generated redundancy signal to be recorded on a track including information employed for generating said redundancy signal.
Claim 14
Dependent Claim
58 words
A magnetic recorder in accordance with claim 12, wherein said signal processing means (4,5) is structured for causing at least a part of said redundancy signal to be gathered in a region substantially in the middle of the track on which it is recorded, and for causing samples to be recorded on both sides of said middle region.
Claim 15
Dependent Claim
49 words
A magnetic recorder as claimed in claim 13, further comprising means (10,11,13,14) for reproducing recorded digital signals and reproduced signal processing means (15,16) for permuting said reproduced digital signals so as to output the signals of each channel in a sequence corresponding to an order of sample numbers thereof.
Claim 16
Dependent Claim
47 words
A magnetic recorder in accordance with claim 2, including means (6) for generating a redundancy signal for error correction or error detection from the digital signals, said signal processing means (4,5) also being structured for providing the redundancy signal to the recording means for recording the same.
Claim 17
Dependent Claim
36 words
A magnetic recorder in accordance with claim 15, wherein said signal processing means is further structured for causing said generated redundancy signal to be recorded on a track including information employed for generating said redundancy signal.
Claim 18
Dependent Claim
58 words
A magnetic recorder in accordance with claim 16, wherein said signal processing means (4,5) is structured for causing at least a part of said redundancy signal to be gathered in a region substantially in the middle of the track on which it is recorded, and for causing samples to be recorded on both sides of said middle region.
Claim 19
Dependent Claim
49 words
A magnetic recorder as claimed in claim 17, further comprising means (10,11,13,14) for reproducing recorded digital signals and reproduced signal processing means (15,16) for permuting said reproduced digital signals so as to output the signals of each channel in a sequence corresponding to an order of sample numbers thereof.
Claim 20
Dependent Claim
225 words
A magnetic reproducer comprising reproducing means including a plurality of rotary heads (10,11) for performing helical scanning to reproduce a recording in the form of a plurality of tracks, each track having a plurality of regions occupying different portions along the length of the track, the reproducer further comprising signal processing means (15,16) for receiving from the reproducing means digital signals comprising odd and even samples of at least one channel for enabling reproduction of interleaved digital signals recorded in such a way that the odd and even samples of said channel are recorded in different tracks and that sequentially occurring odd and even samples are separated in a direction defined along the length of the tracks, wherein the signal processing means (15,16) is structured for reproducing the digital signals of a plurality of channels in such a manner that, for each channel, the odd samples are reproduced in a group from a region of one track and the even samples are reproduced in a group from a region of a different track, the region of said different track containing the even samples occupying a portion of the length of said different track which excludes a portion of said different track corresponding in location to a portion of the length of said one track occupied by the region in which the odd samples are recorded.
Claim 21
Dependent Claim
225 words
A magnetic reproducer comprising reproducing means including a plurality of rotary heads (10,11) for performing helical scanning to reproduce a recording in the form of a plurality of tracks, each track having a plurality of regions occupying different portions along the length of the track, the reproducer further comprising signal processing means (15,16) for receiving from the reproducing means digital signals comprising odd and even samples of at least one channel for enabling reproduction of interleaved digital signals recorded in such a way that the odd and even samples of said channel are recorded in different tracks and that sequentially occurring odd and even samples are separated in a direction defined along the length of the tracks, wherein the signal processing means (15,16) is structured for reproducing the digital signals of a plurality of channels in such a manner that, for each channel, the odd samples are reproduced in a group from a region of one track and the even samples are reproduced in a group from a region of a different track, the region of said different track containing the even samples occupying a portion of the length of said different track which excludes a portion of said different track corresponding in location to a portion of the length of said one track occupied by the region in which the odd samples are recorded.
Claim 22
Dependent Claim
147 words
A magnetic reproducer in accordance with claim 19, wherein each track has at least first and second regions, and the reproduced signal processing means (15,16) is structured for reproducing one of the even samples and the odd samples of a first channel are reproduced in a group from the first region of the first of a pair of tracks, and one of the even samples or the odd samples, respectively, of a second channel are reproduced in a group from the second region of said first track, and the other of the even samples and the odd samples of said second channel are reproduced in a group from the first region of a second of a pair of tracks and the other of the even samples and the odd samples of said first channel are reproduced in a group from the second region of said second track.
Claim 23
Dependent Claim
67 words
A magnetic reproducer in accordance with claim 20, wherein said reproduced signal processing means (15,16) is structured for reproducing said even samples of said first channel and said odd samples of said second channel from one of the first and second tracks and said odd samples of said first channel and said even samples of said second channel from the other of said first and second tracks.
Claim 24
Dependent Claim
69 words
A magnetic reproducer in accordance with claim 20, wherein said reproduced signal processing means (15,16) is structured for reproducing said even samples of said first channel and said even samples of said second channel from one of said first and second tracks and for reproducing said odd samples of said first channel and said odd samples of said second channel from the other of said first and second tracks.
Claim 25
Dependent Claim
44 words
A magnetic reproducer in accordance with any one of claims 21 and 22, wherein the reproduced signal processing means (15,16) is structured for reproducing all the samples of said first and second channels for a predetermined time period from said first and second tracks.
Claim 26
Dependent Claim
26 words
A magnetic reproducer in accordance with claim 23, wherein each track comprises first and second sequentially occurring halves, respectively, including therein said first and second regions.
Claim 27
Dependent Claim
17 words
A magnetic reproducer in accordance with claim 24, wherein said first and second tracks are adjacent tracks.
Claim 28
Dependent Claim
33 words
A magnetic reproducer according to claim 25, wherein said signal processing means comprises further means for reproducing said even samples and odd samples, for each channel, from alternate tracks of a magnetic tape.
Claim 29
Dependent Claim
32 words
A magnetic reproducer in accordance with claim 26, wherein the respective regions of the respective tracks from which said odd samples and said even samples are reproduced all have the same length.
Claim 30
Dependent Claim
20 words
A magnetic reproducer in accordance with claim 27, wherein said reproducer comprises means for reproducing two channels of digital signals.
Claim 31
Dependent Claim
39 words
A magnetic reproducer in accordance with claim 28, including decoding means (17) for correcting or detecting error included in the reproduced digital signals, said reproduced digital signals comprising samples and a redundancy signal for error correction or error detection.
Claim 32
Dependent Claim
33 words
A magnetic reproducer in accordance with claim 29, wherein said decoding means (17) is structured for correcting or detecting errors in the digital signals reproduced from the same track as the redundancy signal.
Claim 33
Dependent Claim
66 words
A magnetic reproducer in accordance with claim 30, wherein said reproduced signal processing means (15,16) is structured for providing to said decoding means (17) a redundancy signal reproduced at least in part from a region substantially in the middle of the track on which it is recorded, as well as for providing to said decoding means (17) samples reproduced from both sides of said middle region.
Claim 34
Dependent Claim
178 words
A recording method for magnetically recording digital signals including odd and even samples of at least one channel by helically scanning a plurality of tracks of a recording medium, each track having a plurality of regions occupying different portions along the length of the track, for enabling interleaved recording of said digital signals in such a way that the odd and even samples of said channel are recorded in different tracks and that sequentially occurring odd and even samples are separated in a direction defined along the length of the tracks, comprising the steps of, for each channel, recording the odd samples in a group in a region of one track, and recording the even samples in a group in a region of a different track, the region of said different track containing the even samples occupying a portion of the length of said different track which excludes a portion of said different track corresponding in location to a portion of the length of said one track occupied by the region in which the odd samples are recorded.
Claim 35
Dependent Claim
178 words
A recording method for magnetically recording digital signals including odd and even samples of at least one channel by helically scanning a plurality of tracks of a recording medium, each track having a plurality of regions occupying different portions along the length of the track, for enabling interleaved recording of said digital signals in such a way that the odd and even samples of said channel are recorded in different tracks and that sequentially occurring odd and even samples are separated in a direction defined along the length of the tracks, comprising the steps of, for each channel, recording the odd samples in a group in a region of one track, and recording the even samples in a group in a region of a different track, the region of said different track containing the even samples occupying a portion of the length of said different track which excludes a portion of said different track corresponding in location to a portion of the length of said one track occupied by the region in which the odd samples are recorded.
Claim 36
Dependent Claim
133 words
A method in accordance with claim 32, wherein each track has at least first and second regions, and comprising the steps of recording one of the even samples and the odd samples of the first channel in a group in the first region of the first of a pair of tracks, recording one of the even samples and the odd samples of a second channel in a group in the second region of said first track, recording the other of the even samples and the odd samples of said second channel in a group in the first region of a second of the pair of tracks and recording the other of the even samples and the odd samples of said first channel in a group in the second region of said second track.
Claim 37
Dependent Claim
61 words
A method in accordance with claim 33, comprising the step of recording said even samples of said first channel and said odd samples of said second channel on one of the first and second tracks and recording said odd samples of said first channel and said even samples of said second channel on the other of said first and second tracks.
Claim 38
Dependent Claim
61 words
A method in accordance with claim 33, comprising the step of recording said even samples of said first channel and said even samples of said second channel on one of said first and second tracks and recording said odd samples of said first channel and said odd samples of said second channel on the other of said first and second tracks.
Claim 39
Independent Claim
38 words
A method in accordance with any one of claims 34 and 35, comprising the step of respectively recording all the samples of said first and second channels for a predetermined time period in said first and second tracks.
Claim 40
Dependent Claim
25 words
A method in accordance with claim 36, wherein said first and second regions are included in the first and second halves, respectively, of each track.
Claim 41
Dependent Claim
16 words
A method in accordance with claim 37, wherein said first and second tracks are adjacent tracks.
Claim 42
Dependent Claim
28 words
A method according to claim 38, comprising the step of recording, for each channel, said even samples and said odd samples in alternate tracks of a magnetic tape.
Claim 43
Dependent Claim
30 words
A method in accordance with claim 39, wherein the respective regions of the tracks in which said odd samples and said even samples are recorded all have the same length.
Claim 44
Dependent Claim
17 words
A method in accordance with claim 40, comprising the step of recording two channels of digital signals.
Claim 45
Dependent Claim
34 words
A method in accordance with claim 41, comprising the further steps of generating, from information contained in the digital signals, a redundancy signal for error correction or error detection and recording said redundancy signal.
Claim 46
Dependent Claim
28 words
A method in accordance with claim 42, comprising the further step of recording said redundancy signal on a track including the information used for generating said redundancy signal.
Claim 47
Dependent Claim
41 words
A method in accordance with claim 43, comprising the step of recording at least a part of said redundancy signal in a middle region, substantially in the middle of a track, and recording samples on both sides of said middle region.
Claim 48
Dependent Claim
38 words
A method in accordance with claim 44, comprising the further step of reproducing and outputting the odd samples and even samples such that the samples of each channel are outputted in an order corresponding to sample numbers thereof.
Claim 49
Dependent Claim
34 words
A method in accordance with claim 33, comprising the further steps of generating, from information contained in the digital signals, a redundancy signal for error correction or error detection and recording said redundancy signal.
Claim 50
Dependent Claim
28 words
A method in accordance with claim 46, comprising the further step of recording said redundancy signal on a track including the information used for generating said redundancy signal.
Claim 51
Dependent Claim
41 words
A method in accordance with claim 47, comprising the step of recording at least a part of said redundancy signal in a middle region, substantially in the middle of a track, and recording samples on both sides of said middle region.
Claim 52
Dependent Claim
38 words
A method in accordance with claim 48, comprising the further step of reproducing and outputting the odd samples and even samples such that the samples of each channel are outputted in an order corresponding to sample numbers thereof.
Claim 53
Dependent Claim
179 words
A reproducing method for magnetically reproducing digital signals including odd and even samples of at least one channel by helically scanning a plurality of tracks of a recording medium, each track having a plurality of regions occupying different portions along the length of the track, for enabling reproduction of said digital signals interleavedly recorded in such a way that the odd and even samples of said channel are recorded in different tracks and that sequentially occurring odd and even samples are separated in a direction defined along the length of the tracks, comprising the steps of, for each channel, reproducing the odd samples in a group from a region of one track, and reproducing the even samples in a group from a region of a different track, the region of said different track containing the even samples occupying a portion of the length of said different track which excludes a portion of said different track corresponding in location to a portion of the length of said one track occupied by the region in which the odd samples are recorded.
Claim 54
Dependent Claim
179 words
A reproducing method for magnetically reproducing digital signals including odd and even samples of at least one channel by helically scanning a plurality of tracks of a recording medium, each track having a plurality of regions occupying different portions along the length of the track, for enabling reproduction of said digital signals interleavedly recorded in such a way that the odd and even samples of said channel are recorded in different tracks and that sequentially occurring odd and even samples are separated in a direction defined along the length of the tracks, comprising the steps of, for each channel, reproducing the odd samples in a group from a region of one track, and reproducing the even samples in a group from a region of a different track, the region of said different track containing the even samples occupying a portion of the length of said different track which excludes a portion of said different track corresponding in location to a portion of the length of said one track occupied by the region in which the odd samples are recorded.
Claim 55
Dependent Claim
133 words
A method in accordance with claim 50, wherein each track has at least first and second regions, and comprising the steps of reproducing one of the even samples and the odd samples of the first channel in a group from the first region of the first of a pair of tracks, reproducing one of the even samples and the odd samples of a second channel in a group from the second region of said first track, reproducing the other of the even samples and the odd samples of said second channel in a group from the first region of a second of the pair of tracks and reproducing the other of the even samples and the odd samples of said first channel in a group from the second region of said second track.
Claim 56
Dependent Claim
61 words
A method in accordance with claim 51, comprising the step of reproducing said even samples of said first channel and said odd samples of said second channel from one of the first and second tracks and reproducing said odd samples of said first channel and said even samples of said second channel from the other of said first and second tracks.
Claim 57
Dependent Claim
61 words
A method in accordance with claim 51, comprising the step of reproducing said even samples of said first channel and said even samples of said second channel from one of said first and second tracks and reproducing said odd samples of said first channel and said odd samples of said second channel from the other of said first and second tracks.
Claim 58
Independent Claim
38 words
A method in accordance with any one of claims 52 and 53, comprising the step of respectively reproducing all the samples of said first and second channels for a predetermined time period from said first and second tracks.
Claim 59
Dependent Claim
25 words
A method in accordance with claim 54, wherein said first and second regions are included in the first and second halves, respectively, of each track.
Claim 60
Dependent Claim
16 words
A method in accordance with claim 55, wherein said first and second tracks are adjacent tracks.
Claim 61
Dependent Claim
28 words
A method according to claim 56, comprising the step of reproducing, for each channel, said even samples and said odd samples from alternate tracks of a magnetic tape.
Claim 62
Dependent Claim
28 words
A method in accordance with claim 57, wherein the respective regions of the tracks from which said odd or even samples are reproduced all have the same length.
Claim 63
Dependent Claim
17 words
A method in accordance with claim 58, comprising the step of reproducing two channels of digital signals.
Claim 64
Dependent Claim
37 words
A method in accordance with claim 59, comprising the further steps of reproducing a redundancy signal for error correction or error detection from the reproduced digital signals and correcting or detecting errors in the reproduced digital signals.
Claim 65
Dependent Claim
26 words
A method in accordance with claim 60, wherein said redundancy signal is reproduced from a track including recorded thereon information used for generating said redundancy signal.
Claim 66
Dependent Claim
41 words
A method in accordance with claim 61, comprising the step of reproducing at least a part of said redundancy signal from a middle region, substantially in the middle of a track, and reproducing samples from both sides of said middle region.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |