Information recording device that can resume recording process at correct location on recording medium

• US 6,791,922 B2
• Filed: 05/22/2001
• Issued: 09/14/2004
• Est. Priority Date: 05/24/2000
• Status: Expired due to Fees

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Suzuki, Haruyuki
• Primary Examiner(s): Edun, Muhammad
• Application Number:
  US09/861,611
• Publication Number:
  US 20020012296A1
• Time in Patent Office: 1,211 Days
• Field of Search: 369/47.1, 369/47.11, 369/47.15, 369/47.22, 369/47.28, 369/47.3, 369/47.46, 369/53.1, 369/53.2, 369/53.29, 369/53.41, 369/59.1, 369/59.13, 369/59.14, 369/59.2, 369/59.23, 369/59.25
• US Class Current: 369/47.3
• CPC Class Codes: G11B 20/10527 Audio or video recording; Data buffering arrangements G11B20/12 - G11B20/18 take precedence
• CPC Class Codes: G11B 20/1217 on discs
• CPC Class Codes: G11B 2020/10814 involving specific measures to prevent a buffer underrun
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 2220/216 Rewritable discs
• CPC Class Codes: G11B 2220/218 Write-once discs
• CPC Class Codes: G11B 2220/2545 CDs
• CPC Class Codes: G11B 2220/65 wherein solid state memory is used for storing indexing information or metadata
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/11 by using information not detectable on the record carrier
• CPC Class Codes: G11B 27/329 on a disc [VTOC]

Abstract

An information recording device is provided. The information recording device includes an end detecting unit, a timing management unit, an encoder, and the like. In a case in which the information recording device writes data having a fixed unit length on a recording medium by dispersing and rearranging the data based on a fixed rule, the end detecting unit detects an end location of data recorded on the recording medium. The timing management unit decides a starting location on the recording medium for dispersing and rearranging data based on the end location. The encoder disperses and rearranges additional data by starting from the starting location, and writes the additional data on the recording medium continuously from the end location.

Claims

1. An information recording device, comprising:

a data writing unit writing data having a fixed unit length in a recording medium, by dispersing and rearranging the data based on a fixed rule;

an ending-location detecting unit detecting an ending location of the data written in the recording medium;

a starting-location deciding unit deciding a starting location in the recording medium to start dispersing and rearranging the data, based on said ending location;

a dispersing/rearranging unit dispersing and rearranging additional data, by starting from said starting location; and

a data adding unit writing the additional data dispersed and rearranged by said dispersing/rearranging unit, continuously from said ending location in the recording medium.

2. The information recording device as claimed in claim 1, further comprising a synchronizing unit synchronizing a data-write timing to a reproducing timing of the data written in the recording medium until just before writing said additional data in the recording medium.

3. The information recording device as claimed in claim 1, further comprising an information creating unit creating content information that indicates contents of the data written in the recording medium.

4. The information recording device as claimed in claim 3, wherein said content information is index information.

5. The information recording device as claimed in claim 1, wherein said fixed unit length is a sector length.

6. The information recording device as claimed in claim 1, wherein said data writing unit writes the data having the fixed unit length in the recording medium, by interleaving the data, and said dispersing/rearranging unit interleaves the additional data, by starting from said starting location.

7. The information recording device as claimed in claim 1, wherein said starting location is at least an interleaving length away from said ending location.

8. A method of recording information in a recording medium, comprising the steps of:

writing data having a sector length in the recording medium by interleaving the data;

detecting an ending location of the data written in the recording medium;

deciding a location that is at least an interleaving length away from said ending location as a starting location for interleaving the data;

interleaving additional data by starting from said starting location; and

writing said additional data in the recording medium continuously from said ending location.

9. The method as claimed in claim 8, further comprising the step of synchronizing a data-write timing to a reproducing timing of the data written in the recording medium until just before writing said additional data in the recording medium.

10. The method as claimed in claim 8, further comprising the step of creating content information that indicates contents of the data written in the recording medium.

11. A recording medium readable by a computer, tangibly embodying a program of instructions executable by the computer to write data in a recording medium, wherein said program includes the steps of:

writing data having a fixed unit length in the recording medium, by dispersing and rearranging the data based on a fixed rule;

detecting an ending location of the data written in the recording medium;

deciding a starting location in the recording medium to start dispersing and rearranging the data, based on said ending location;

dispersing and rearranging additional data, by starting from said starting location;

writing said additional data continuously from said ending location in the recording medium;

synchronizing a data-write timing to a reproducing timing of the data written in the recording medium until just before writing said additional data in the recording medium; and

creating content information that indicates contents of the data written in the recording medium.

12. An optical-disk recording device, comprising:

a data writing unit interleaving data that has a sector length, and writing the data on an optical disk by emitting laser light onto the optical disk;

an ending-location detecting unit detecting an ending location of the data written on the optical disk;

a starting-location deciding unit deciding a location that is at least an interleaving length away from said ending location as a starting location for interleaving the data;

an interleaving unit interleaving additional data, by starting from said starting location; and

a data adding unit writing the additional data interleaved by said interleaving unit, continuously from said ending location on the optical disk.

13. The optical-disk recording device as claimed in claim 12, further comprising a synchronizing unit synchronizing a data-write timing to a reproducing timing of the data written on the optical disk until just before writing said additional data on the optical disk.

14. The optical-disk recording device as claimed in claim 12, further comprising an information creating unit creating content information that indicates contents of the data written on the optical disk.

15. The optical-disk recording device as claimed in claim 14, wherein said content information is index information.

16. A method of recording information on an optical disk, comprising the steps of:

interleaving data having a sector length;

writing the data on the optical disk by emitting laser light onto the optical disk;

detecting an ending location of the data written on the optical disk;

deciding a location that is at least an interleaving length away from said ending location as a starting location for interleaving the data;

interleaving additional data by starting from said starting location; and

writing said additional data on the optical disk continuously from said ending location.

17. The method as claimed in claim 16, further comprising the step of synchronizing a data-write timing to a reproducing timing of the data written on the optical disk until just before writing said additional data on the optical disk.

18. The method as claimed in claim 16, further comprising the step of creating content information that indicates contents of the data written on the optical disk.

19. An information recording system, comprising:

an upper-level device outputting data that has a fixed unit length; and

an information recording device writing the data outputted by said upper-level device in a recording medium, by dispersing and rearranging the data based on a fixed rule,

wherein said information recording device includes;

an ending-location detecting unit detecting an ending location of the data written in the recording medium;

a starting-location deciding unit deciding a starting location in the recording medium to start dispersing and rearranging the data, based on said ending location;

a dispersing/rearranging unit dispersing and rearranging additional data that is outputted from said upper-level device, by starting from said starting location; and

a data adding unit writing the additional data dispersed and rearranged by said dispersing/rearranging unit, continuously from said ending location in the recording medium.

20. The information recording system as claimed in claim 19, wherein said information recording device further includes a synchronizing unit synchronizing a data-write timing to a reproducing timing of the data written in the recording medium until just before writing said additional data in the recording medium.

21. The information recording system as claimed in claim 19, wherein said information recording device further includes an information creating unit creating written-data information that indicates contents of the data written in the recording medium, and an information notifying unit notifying said upper-level device about the written-data information and ending information that indicates said ending location.

22. The information recording system as claimed in claim 21, wherein said upper-level device includes an information storing unit storing output-data information that indicates contents of the data outputted to said information recording device, and an output-data deciding unit deciding the additional data to be outputted to said information recording device by comparing said output-data information with said written-data information and said ending information.

23. An optical-disk recording system, comprising:

a computer outputting data that has a sector length; and

an optical-disk recording device interleaving the data outputted by said computer, and, then, writing the data on an optical disk by emitting laser light onto the optical disk,

wherein said optical-disk recording device includes;

an ending-location detecting unit detecting an ending location of the data written on the optical disk;

a starting-location deciding unit deciding a location that is at least an interleaving length away from said ending location as a starting location for interleaving the data;

an interleaving unit interleaving additional data that is outputted by said computer, by starting from said starting location; and

a data adding unit writing the additional data interleaved by said interleaving unit, continuously from said ending location on the optical disk.

24. The optical-disk recording system as claimed in claim 23, wherein said optical-disk recording device further includes a synchronizing unit synchronizing a data-write timing to a reproducing timing of the data written on the optical disk until just before writing said additional data on the optical disk.

25. The optical-disk recording system as claimed in claim 23, wherein said optical-disk recording device further includes an information creating unit creating written-data information that indicates contents of the data written on the optical disk, and an information notifying unit notifying said computer about the written-data information and ending information that indicates said ending location.

26. The optical-disk recording system as claimed in claim 25, wherein said computer includes an information storing unit storing output-data information that indicates contents of the data outputted to said optical-disk recording device, and an output-data deciding unit deciding the additional data to be outputted to said optical-disk recording device by comparing said output-data information with said written-data information and said ending information.

27. The optical-disk recording system as claimed in claim 23, wherein said written-data information and said output-data information is index information.

28. An information recording device, comprising:

a data writing unit writing data having a fixed unit length in a recording medium, by dispersing and rearranging the data based on a fixed rule;

an interrupted-location obtaining unit obtaining an interrupted location of the data written in the recording medium if a data writing process is interrupted;

an information obtaining unit obtaining interrupted-data information that indicates contents of the data whose data writing process is interrupted, identification information about the recording medium, and written-data information that indicates contents of the data written in the recording medium;

an information/location storing unit storing the interrupted-data information, the identification information, the written-data information and the interrupted location, by relating the interrupted-data information, the identification information, the recorded-data information and the interrupted location to each other;

a dispersing/rearranging unit confirming that the recording medium, on which the data writing process is interrupted, is installed, based on said identification information stored in said information/location storing unit, and dispersing and rearranging the data corresponding to the interrupted-data information and the recorded-data information stored in said information/location storing unit, when resuming the data writing process; and

a data adding unit writing the data dispersed and rearranged by said dispersing/rearranging unit, continuously from said interrupted location in the recording medium.

29. A method of recording information in a recording medium, comprising the steps of:

writing data having a fixed unit length in a recording medium, by dispersing and rearranging the data based on a fixed rule;

obtaining an interrupted location of the data written in the recording medium if a data writing process is interrupted;

obtaining interrupted-data information that indicates contents of the data whose data writing process is interrupted, identification information about the recording medium, and written-data information that indicates contents of the data written in the recording medium;

storing the interrupted-data information, the identification information, the written-data information and the interrupted location, by relating the interrupted-data information, the identification information, the recorded-data information and the interrupted location to each other;

confirming that the recording medium, on which the data writing process is interrupted, is installed, based on said identification information, when resuming the data writing process;

dispersing and rearranging the data corresponding to said interrupted-data information and said recorded-data information; and

writing said data continuously from said interrupted location in the recording medium.

30. A recording medium readable by a computer, tangibly embodying a program of instructions executable by the computer to write data in a recording medium, wherein said program includes the steps of:

writing data having a fixed unit length in a recording medium, by dispersing and rearranging the data based on a fixed rule;

obtaining an interrupted location of the data written in the recording medium if a data writing process is interrupted;

obtaining interrupted-data information that indicates contents of the data whose data writing process is interrupted, identification information about the recording medium, and written-data information that indicates contents of the data written in the recording medium;

storing the interrupted-data information, the identification information, the written-data information and the interrupted location, by relating the interrupted-data information, the identification information, the recorded-data information and the interrupted location to each other;

confirming that the recording medium, on which the data writing process is interrupted, is installed, based on said identification information, when resuming the data writing process;

dispersing and rearranging the data corresponding to said interrupted-data information and said recorded-data information; and

writing said data continuously from said interrupted location in the recording medium.

31. An optical-disk recording device, comprising:

a data writing unit interleaving data having a sector length, and writing the data on an optical disk by emitting laser light onto the optical disk;

an interrupted-location obtaining unit obtaining an interrupted location of the data written on the optical disk if a data writing process is interrupted;

an information obtaining unit obtaining interrupted-data information that indicates contents of the data whose data writing process is interrupted, identification information about the optical disk, and written-data information that indicates contents of the data written on the optical disk;

an information/location storing unit storing the interrupted-data information, the identification information, the written-data information and the interrupted location, by relating the interrupted-data information, the identification information, the recorded-data information and the interrupted location to each other;

an interleaving unit confirming that the optical disk, on which the data writing process is interrupted, is installed, based on said identification information stored in said information/location storing unit, and interleaving the data corresponding to the interrupted-data information and the recorded-data information stored in said information/location storing unit, when resuming the data writing process; and

a data adding unit writing the data interleaved by said interleaving unit, continuously from said interrupted location in the optical disk.

32. A method of recording information on an optical disk, comprising the steps of:

interleaving data having a sector length;

writing the data on the optical disk by emitting laser light onto the optical disk;

obtaining an interrupted location of the data written on the optical disk if a data writing process is interrupted;

obtaining interrupted-data information that indicates contents of the data whose data writing process is interrupted, identification information about the optical disk, and written-data information that indicates contents of the data written on the optical disk;

storing the interrupted-data information, the identification information, the written-data information and the interrupted location, by relating the interrupted-data information, the identification information, the recorded-data information and the interrupted location to each other;

confirming that the optical disk, on which the data writing process is interrupted, is installed, based on said identification information, when resuming the data writing process;

interleaving the data corresponding to said interrupted-data information and said recorded-data information; and

writing said data continuously from said interrupted location in the optical disk.

33. An information recording system, comprising:

an upper-level device outputting data that has a fixed unit length; and

an information recording device writing the data outputted by said upper-level device in a recording medium, by dispersing and rearranging the data based on a fixed rule,

wherein said information recording device includes;

an interrupted-location obtaining unit obtaining an interrupted location of the data written in the recording medium if a data writing process is interrupted;

an information obtaining unit obtaining interrupted-data information that indicates contents of the data whose data writing process is interrupted, identification information about the recording medium, and written-data information that indicates contents of the data written in the recording medium;

an information/location storing unit storing the interrupted-data information, the identification information, the written-data information and the interrupted location, by relating the interrupted-data information, the identification information, the recorded-data information and the interrupted location to each other;

a dispersing/rearranging unit confirming that the recording medium, on which the data writing process is interrupted, is installed, based on said identification information stored in said information/location storing unit, and dispersing and rearranging the data corresponding to the interrupted-data information and the recorded-data information stored in said information/location storing unit, when resuming the data writing process; and

a data adding unit writing the data dispersed and rearranged by said dispersing/rearranging unit, continuously from said interrupted location in the recording medium.

34. An optical-disk recording system, comprising:

a computer outputting data that has a sector length; and

an optical-disk recording device interleaving the data outputted by said computer, and, then, writing the data on an optical disk by emitting laser light onto the optical disk,

wherein said optical-disk recording device includes;

an interrupted-location obtaining unit obtaining an interrupted location of the data written on the optical disk if a data writing process is interrupted;

an information obtaining unit obtaining interrupted-data information that indicates contents of the data whose data writing process is interrupted, identification information about the optical disk, and written-data information that indicates contents of the data written on the optical disk;

an information/location storing unit storing the interrupted-data information, the identification information, the written-data information and the interrupted location, by relating the interrupted-data information, the identification information, the recorded-data information and the interrupted location to each other;

an interleaving unit confirming that the optical disk, on which the data writing process is interrupted, is installed, based on said identification information stored in said information/location storing unit, and interleaving the data corresponding to the interrupted-data information and the recorded-data information stored in said information/location storing unit, when resuming the data writing process; and

a data adding unit writing the data interleaved by said interleaving unit, continuously from said interrupted location in the optical disk.