EP0649136A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A method for recording digital data, digital data recording device, digital data reproducing device, and digital data recording and reproducing device
Assignee: Panasonic Holdings Corp
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Filing: 1994-10-14
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Granted: —
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Expires: 2014-10-14
Abstract
Abstract A plurality of digital signals having total data rates of n bit/s or less are input to a digital recording device recording digital signals having a data rate of n bit/s. The digital signals are subjected to format-conversion for the digital recording device to be recorded therein. Furthermore, signals having a data rate of n/i 1 bit/s or less are subjected to format-conversion to be recorded i 1 times in the digital recording device. In the case where the data rate of the digital signals to be input is n/j bit/s, the digital signals are subjected to format-conversion so that the amount of data capable of being recorded per unit time is decreased by i/j; thus, the digital signals are recorded for a long period of time under the condition that the data recording time is prolonged j times. Furthermore, when input data to be recorded on a magnetic tape at a normal data rate by using a magnetic head mounted on a rotary cylinder is recorded, the recording device of the present application makes it possible to select a plurality of types of track angles generated by the rotation number of the cylinder, the tape traveling speed, and the like.
Inventors
- 👤 Masazumi Yamada
- 👤 Chiyoko Matsumi
- 👤 Tatsuro Juri
- 👤 Ichiro Arimura
- 👤 Yukio Kurano
- 👤 Akira Iketani
- 👤 Yoshinori Kitamura
- 👤 Chojuro Yamamitsu
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 13:32
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/10; G11B27/11; G11B15/00; G11B15/02; G11B15/05; G11B15/06; G11B15/07; G11B15/087; G11B15/12; G11B15/125; G11B15/18; G11B15/1808; G11B15/1875; G11B15/46; G11B15/467; G11B15/4671; G11B15/4673; G11B20/00; G11B20/00007; G11B20/10; G11B20/10527; G11B27/005; G11B27/02; G11B27/031; G11B27/032; G11B5/00; G11B5/008; G11B5/00813; G11B5/00847; G11B5/0086; G11B5/02; G11B5/09; H; H03; H03M; H03M13/00; H03M7/00; H03M7/30; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/7824; H04N5/7826; H04N5/78263; H04N5/783; H04N5/91; H04N5/92; H04N5/9201; H04N5/9205; H04N9/00; H04N9/79; H04N9/7921; G11B15/473; G11B15/4731; G11B15/52; G11B15/60; G11B15/602; G11B2020/10537; G11B2020/10592; G11B2020/10935; G11B2020/10981; G11B2220/00; G11B2220/90; G11B27/19; G11B27/28; H04N5/926; H04N5/9261; H04N5/9265; H04N5/9267; H04N5/93; H04N5/94; H04N5/945
Claims Analysis
Total Claims: 37
Claim 1
Independent Claim
94 words
A method for recording digital data by using a recording device recording a data stream having a predetermined data rate of n bit/s (n is a positive number) on a recording medium, comprising the steps of: performing a data conversion step by receiving a plurality of input data streams having total data rates of n bit/s or less and converting the plurality of input data streams into a single output data stream having a data rate of n bit/s or less; and performing a data recording step by recording the single output data stream.
Claim 2
Independent Claim
107 words
A method for recording digital data by using a recording device recording a data stream having a predetermined data rate of n bit/s (n is a positive number) on a recording medium, comprising the steps of: performing a data conversion step by receiving a single input data stream having a data rate of n/i₁ bit/s (n is a positive number, and i₁ is an integer of 2 or more) and converting the single input data stream into a single output data stream having a data rate of n bit/s or less; and performing a data recording step by recording the single output data stream for i₁ times.
Claim 3
Dependent Claim
45 words
A method for recording digital data according to claim 1, wherein the plurality of input data streams include i₂ data streams each having a data rate of n/i₂ bit/s (n is a positive number, and i₂ is an integer of 2 or more) or less.
Claim 4
Dependent Claim
86 words
A method for recording digital data according to claim 1, wherein the data conversion step includes the step of receiving i₃ input data streams each having a data rate of n/i₃/i₄ bit/s (n is a positive number, and i₃ and i₄ are integers of 2 or more) and converting the plurality of input data streams into the single output data stream having a data rate of n/i₄ bit/s, and the data recording step includes the step of recording the single output data stream for i₄ times.
Claim 5
Dependent Claim
34 words
A method for recording digital data according to claim 1, wherein the data recording step includes the step of recording digital data indicating the number of the input data streams on the recording medium.
Claim 6
Dependent Claim
43 words
A method for recording digital data according to claim 1, wherein the data recording step includes the step of recording digital data indicating the number of the input data streams on an auxiliary storage medium provided in a cassette accommodating the recording medium.
Claim 7
Dependent Claim
41 words
A method for recording digital data according to claim 2, wherein the data recording step includes the step of recording digital data indicating the number of the input data streams and the number of repetition of recording on the recording medium.
Claim 8
Dependent Claim
50 words
A method for recording digital data according to claim 2, wherein the data recording step includes the step of recording digital data indicating the number of the input data streams and the number of repetition of recording on an auxiliary storage medium provided in a cassette accommodating the recording medium.
Claim 9
Independent Claim
114 words
A method for recording digital data by using a recording device having a head mounted on a rotary cylinder, the recording device recording a data stream having a predetermined data rate of n bit/s (n is a positive number) on a traveling recording medium, comprising the steps of: performing a data recording step by receiving an input data stream having a data rate of n/j bit/s or less (j is an integer of 2 or more), setting a traveling speed of the recording medium to be 1/j of a standard traveling speed and recording the output data stream on the recording medium by 1/j of scan times of the recording medium by the head.
Claim 10
Dependent Claim
63 words
A method for recording digital data according to claim 9, wherein the recording device includes paired heads, the paired heads are respectively provided so as to be symmetric with respect to a rotation axis of the rotary cylinder and have different azimuths, the recording device records the output data stream by helically scanning the recording medium, and the j is an odd number.
Claim 11
Dependent Claim
32 words
A method for recording digital data according to claim 9, wherein the data recording step includes the step of recording digital data indicating a value of the j on the recording medium.
Claim 12
Dependent Claim
41 words
A method for recording digital data according to claim 9, wherein the data recording step includes the step of recording digital data indicating a value of the j on an auxiliary storage medium provided in a cassette accommodating the recording medium.
Claim 13
Dependent Claim
32 words
A method for recording digital data according to claim 10, wherein the data recording step includes the step of recording digital data indicating a value of the j on the recording medium.
Claim 14
Dependent Claim
41 words
A method for recording digital data according to claim 10, wherein the data recording step includes the step of recording digital data indicating a value of the j on an auxiliary storage medium provided in a cassette accommodating the recording medium.
Claim 15
Independent Claim
89 words
A method for recording digital data by using a recording device recording a data stream having a predetermined data rate of n bit/s (n is a positive number) on a recording medium, comprising the step of: performing a data recording step by receiving a data stream having a data rate of n x (k₁/k₂) bit/s (k₁ and k₂ are integers of 2 or more, and k₁ < k₂), setting a traveling speed of the recording medium to be k₁/k₂ times, and recording the data stream on the recording medium.
Claim 16
Dependent Claim
32 words
A method for recording digital data according to claim 15, wherein the data recording step includes the step of recording digital data indicating a value of the k₁/k₂ on the recording medium.
Claim 17
Dependent Claim
41 words
A method for recording digital data according to claim 15, wherein the data recording step includes the step of recording digital data indicating a value of the k₁/k₂ on an auxiliary storage medium provided in a cassette accommodating the recording medium.
Claim 18
Dependent Claim
74 words
A digital data recording device provided with a rotary cylinder, and a head mounted on the rotary cylinder, for recording digital data on a recording medium, comprising: recording means for recording a data stream having a predetermined data rate on the recording medium based on a recording format capable of selecting a plurality of track angles determined in accordance with a speed vector of the head and a speed vector of the recording medium.
Claim 19
Dependent Claim
62 words
A digital data recording device according to claim 18, comprising first recording control means for controlling traveling of the recording medium so that the data stream is recorded on the recording medium once in every m times scans of the head when the data stream has a data rate which is 1/m (m is a natural number) of a predetermined data rate.
Claim 20
Dependent Claim
39 words
A digital data recording device according to claim 18, comprising second recording control means for stopping traveling of the recording medium so as not to record the digital data on the recording medium for a predetermined period of time.
Claim 21
Dependent Claim
39 words
A digital data recording device according to claim 19, comprising second recording control means for stopping traveling of the recording medium so as not to record the digital data on the recording medium for a predetermined period of time.
Claim 22
Dependent Claim
88 words
A digital data recording device for recording a data stream having a predetermined data rate of n bit/s (n is a positive number), comprising: data compressing means for receiving an input data stream having a data rate of n bit/s or less and performing time axis compression with respect to the input data stream so that the input data stream is compressed into an output data stream having a data rate of n bit/s; and data recording means for recording the output data stream on the recording medium.
Claim 23
Dependent Claim
74 words
A digital data recording device provided with a rotary cylinder, and a head mounted on the rotary cylinder, for recording digital data on a recording medium, comprising: recording means for recording a data stream at a track pitch smaller than a track pitch at which normal-rate signals are to be recorded, in a case where the data stream is low-rate signals to be reproduced at a data rate lower than a predetermined data rate.
Claim 24
Dependent Claim
52 words
A digital data recording device according to claim 18, wherein the recording means records digital data indicating at least one of the group consisting of a track angle during recording, a traveling speed of the recording medium, a rotation number of the rotary cylinder, and a track pitch of the recording medium.
Claim 25
Dependent Claim
52 words
A digital data recording device according to claim 23, wherein the recording means records digital data indicating at least one of the group consisting of a track angle during recording, a traveling speed of the recording medium, a rotation number of the rotary cylinder, and a track pitch of the recording medium.
Claim 26
Dependent Claim
69 words
A digital data reproducing device for reproducing digital data from a recording medium by using a head mounted on a rotary cylinder, comprising: data reproducing means for reproducing digital data recorded on the recording medium at a data rate higher than a data rate during recording by increasing a rotation number of the rotary cylinder; and data output means for selectively outputting required data among the reproduced digital data.
Claim 27
Dependent Claim
117 words
A digital data reproducing device for reproducing digital data from a recording medium by using a head mounted on a rotary cylinder, comprising: data reproducing means for reproducing low-rate signals, which are to be reproduced at a data rate lower than a predetermined data rate, at a data rate higher than a data rate of the low-rate signals with the rotation number of the rotary cylinder substantially equal to the rotation number of the rotary cylinder during reproducing normal-rate signals which are to be reproduced at the predetermined data rate, in a case where the low-rate signals and the normal-rate signals are present; and data output means for selectively outputting required data among the reproduced digital data.
Claim 28
Dependent Claim
36 words
A digital data reproducing device according to claim 27, wherein the data reproducing means and the data output means reproduce the low-rate signals by using a processing method utilized for slow reproduction of the normal-rate signals.
Claim 29
Dependent Claim
24 words
A digital data reproducing device according to claim 26, wherein the data rate is in proportion with a traveling speed of the recording medium.
Claim 30
Dependent Claim
24 words
A digital data reproducing device according to claim 27, wherein the data rate is in proportion with a traveling speed of the recording medium.
Claim 31
Dependent Claim
109 words
A digital data recording and reproducing device comprising recording means for recording a data stream having a predetermined data rate on a recording medium by using a head mounted on a rotary cylinder and reproducing means for reproducing a data stream recorded by the recording means, wherein, in a case where a data stream to be recorded is a data stream having a low data rate to be reproduced at a data rate lower than a predetermined data rate, the reproducing means reproduces the data stream at the predetermined data rate, and the recording means records the data stream reproduced by the reproducing means at the predetermined data rate.
Claim 32
Dependent Claim
26 words
A digital data recording and reproducing device according to claim 31, wherein the data rate is in proportion with a traveling speed of the recording medium.
Claim 33
Dependent Claim
54 words
A digital data recording and reproducing device according to claim 31, wherein the recording means records digital data indicating at least one of the group consisting of a track angle during recording, a traveling speed of the recording medium, a rotation number of the rotary cylinder, and a track pitch of the recording medium.
Claim 34
Dependent Claim
84 words
A digital data recording device provided with a rotary cylinder, and a head mounted on the rotary cylinder, for recording digital data on a recording medium, comprising: recording means for recording the digital data on the recording medium so that an angle of tracks formed on the recording medium traveling at a recording medium traveling speed different from a predetermined recording medium traveling speed is equal to an angle of tracks formed on the recording medium traveling at the predetermined recording medium traveling speed.
Claim 35
Dependent Claim
41 words
A digital data recording device according to claim 34, wherein the recording means controls an angle formed by a rotation axis of the rotary cylinder and a traveling direction of the recording medium in accordance with the recording medium traveling speed.
Claim 36
Dependent Claim
33 words
A digital data recording device according to claim 34, wherein the recording means includes head moving means for moving the head in a direction parallel with a rotation axis of the rotary cylinder.
Claim 37
Dependent Claim
25 words
A digital data recording device according to claim 34, wherein the recording means records data indicating the recording medium traveling speed on the recording medium.
References Cited (Backward Citations)
No citation records indexed.
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