EP0327201A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Data recorders and methods of recording digital data
Assignee: Hewlett Packard Ltd
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Filing: 1989-01-06
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Granted: —
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Expires: 2009-01-06
Abstract
Abstract A predetermined amount of data to be recorded is treated as one frame, and data having a predetermined format is recorded for each frame. A first area for recording main data and a second area for recording sub data are formed in each frame. Plural types of data segmentation units each comprising a plurality of frames are set, and a first count signal (FMC) indicating the number of first units from a leading end of a recording medium (15) and other count signals (SSMC, RMC) indicating the numbers of other units from the leading end of the recording medium (15) to a trailing end of the first units are recorded in the second area of a frame constituting the unit including the trailing end, thus facilitating a high-speed search operation.
Inventors
- 👤 Yoshizumi C/O Patents Division Sony Corp Inazawa
- 👤 Shinya c/o Patents Division Sony Corp. Ozaki
- 👤 Brian C/O Hewlett-Packard Limited Milthorp
- 👤 Bruce C/O Hewlett-Packard Limited Thompson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 10:33
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/12; G11B20/1201; G11B20/1207; G11B20/1209; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/3063; G11B20/1211; G11B2220/00; G11B2220/90; G11B2220/91; G11B2220/913
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
197 words
A data recorder for recording digital data on a recording medium (15) wherein predetermined amounts of the data are treated as separate frames and data having a predetermined format is recorded on the recording medium (15) for each frame, the data format being such that the data is organised into main data and sub data for each frame, and wherein a first area for recording main data and a second area for recording sub data are formed in each frame, the data recorder comprising means (6) for recording on the recording medium (15) a plurality of types of data segmentation units each comprising a plurality of frames and a first count signal (FMC) indicating the number of a first type of such data segmentation units from a leading end of the recording medium (15) and a second count signal (SSMC) indicating the number of another type of such data segmentation units from the leading end of the recording medium (15) to a trailing end of the first units, and wherein the first and second count signals (FMC, SSMC) are recorded in the second area of each frame forming part of the first unit including the trailing end.
Claim 2
Dependent Claim
197 words
A data recorder for recording digital data on a recording medium (15) wherein predetermined amounts of the data are treated as separate frames and data having a predetermined format is recorded on the recording medium (15) for each frame, the data format being such that the data is organised into main data and sub data for each frame, and wherein a first area for recording main data and a second area for recording sub data are formed in each frame, the data recorder comprising means (6) for recording on the recording medium (15) a plurality of types of data segmentation units each comprising a plurality of frames and a first count signal (FMC) indicating the number of a first type of such data segmentation units from a leading end of the recording medium (15) and a second count signal (SSMC) indicating the number of another type of such data segmentation units from the leading end of the recording medium (15) to a trailing end of the first units, and wherein the first and second count signals (FMC, SSMC) are recorded in the second area of each frame forming part of the first unit including the trailing end.
Claim 3
Dependent Claim
18 words
A data recorder according to claim 1, wherein the first unit is included in the predetermined data format.
Claim 4
Dependent Claim
40 words
A data recorder according to claim 1 or claim 2, wherein the first count signal is a signal (FMC) indicating a count value of file marks sent by a host computer (3) together with the data to the data recorder.
Claim 5
Dependent Claim
88 words
A data recorder according to claim 1, claim 2 or claim 3, wherein the second count signal is a signal (SSMC) indicating a count value of set save marks sent by a host computer (3) together with the data to the data recorder to allow fast searching to a point on the recording medium (15) without having to know the number of first data segmentation units that have been previously recorded from the leading end of the recording medium up to a particular point on the recording medium.
Claim 6
Dependent Claim
39 words
A data recorder according to claim 1, claim 2 or claim 3, wherein the second count signal is a signal (RMC) indicating a count value of the number of records recorded on the recording medium (15) since the beginning.
Claim 7
Dependent Claim
37 words
A data recorder according to any one of the preceding claims, wherein a digital audio tape recorder (1) is used, the first area is a pulse code modulation area and the second area is a sub-code area.
Claim 8
Dependent Claim
179 words
A recording medium (15) on which are recorded predetermined amounts of digital data having a predetermined format and which are treated as separate frames, the data format being such that the data is organised into main data and sub data for each frame, and wherein in a first area of each frame are recorded main data and in a second area are recorded sub data, and wherein further recorded on the recording medium (15) are a plurality of types of data segmentation units each comprising a plurality of frames and a first count signal (FMC) indicating the number of a first type of such data segmentation units from a leading end of the recording medium (15) and a second count signal (SSMC) indicating the number of another type of such data segmentation units from the leading end of the recording medium (15) to a trailing end of the first units, and wherein the first and second count signals (FMC, SSMC) are recorded in the second area of each frame forming part of the first unit including the trailing end.
Claim 9
Dependent Claim
179 words
A recording medium (15) on which are recorded predetermined amounts of digital data having a predetermined format and which are treated as separate frames, the data format being such that the data is organised into main data and sub data for each frame, and wherein in a first area of each frame are recorded main data and in a second area are recorded sub data, and wherein further recorded on the recording medium (15) are a plurality of types of data segmentation units each comprising a plurality of frames and a first count signal (FMC) indicating the number of a first type of such data segmentation units from a leading end of the recording medium (15) and a second count signal (SSMC) indicating the number of another type of such data segmentation units from the leading end of the recording medium (15) to a trailing end of the first units, and wherein the first and second count signals (FMC, SSMC) are recorded in the second area of each frame forming part of the first unit including the trailing end.
Claim 10
Independent Claim
195 words
A method of recording digital data on a recording medium (15) wherein predetermined amounts of the data are treated as separate frames and data having a predetermined format is recorded on the recording medium (15) for each frame, the data format being such that the data is organised into main data and sub data for each frame, and wherein a first area for recording main data and a second area for recording sub data are formed in each frame, the data recording method comprising the steps of recording on the recording medium (15) a plurality of types of data segmentation units each comprising a plurality of frames and a first count signal (FMC) indicating the number of a first type of such data segmentation units from a leading end of the recording medium (15) and a second count signal (SSMC) indicating the number of another type of such data segmentation units from the leading end of the recording medium (15) to a trailing end of the first units, and recording the first and second count signals (FMC, SSMC) in the second area of each frame forming part of the first unit including the trailing end.
Claim 11
Independent Claim
195 words
A method of recording digital data on a recording medium (15) wherein predetermined amounts of the data are treated as separate frames and data having a predetermined format is recorded on the recording medium (15) for each frame, the data format being such that the data is organised into main data and sub data for each frame, and wherein a first area for recording main data and a second area for recording sub data are formed in each frame, the data recording method comprising the steps of recording on the recording medium (15) a plurality of types of data segmentation units each comprising a plurality of frames and a first count signal (FMC) indicating the number of a first type of such data segmentation units from a leading end of the recording medium (15) and a second count signal (SSMC) indicating the number of another type of such data segmentation units from the leading end of the recording medium (15) to a trailing end of the first units, and recording the first and second count signals (FMC, SSMC) in the second area of each frame forming part of the first unit including the trailing end.
Claim 12
Dependent Claim
17 words
A method according to claim 8, wherein the first unit is included in the predetermined data format.
Claim 13
Dependent Claim
39 words
A method according to claim 8 or claim 9, wherein the first count signal is a signal (FMC) indicating a count value of file marks sent by a host computer (3) together with the data to the data recorder.
Claim 14
Dependent Claim
87 words
A method according to claim 8, claim 9 or claim 10, wherein the second count signal is a signal (SSMC) indicating a count value of set save marks sent by a host computer (3) together with the data to the data recorder to allow fast searching to a point on the recording medium (15) without having to know the number of first data segmentation units that have been previously recorded from the leading end of the recording medium up to a particular point on the recording medium.
Claim 15
Dependent Claim
38 words
A method according to claim 8, claim 9 or claim 10, wherein the second count signal is a signal (RMC) indicating a count value of the number of records recorded on the recording medium (15) since the beginning.
References Cited (Backward Citations)
No citation records indexed.
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