Method of recording data in multilayered recordable optical recording medium, recording and reproducing apparatus for recording the data in the recording medium and the recording medium

• US 8,009,534 B2
• Filed: 09/12/2008
• Issued: 08/30/2011
• Est. Priority Date: 09/14/2007
• Status: Expired due to Fees

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Sasa, Noboru
• Primary Examiner(s): GIESY, ADAM
• Application Number:
  US12/209,865
• Publication Number:
  US 20090073844A1
• Time in Patent Office: 1,082 Days
• Field of Search: 369/47.53
• US Class Current: 369/47.53
• CPC Class Codes: G11B 2007/0013 for carriers having multiple discrete layers
• CPC Class Codes: G11B 7/00736 Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information sector headers or adresses in prepits G11B7/00745; address data in track wobble G11B7/24082
• CPC Class Codes: G11B 7/0953 to compensate for eccentricity of the disc or disc tracks
• CPC Class Codes: G11B 7/1267 Power calibration

Abstract

A method of recording data in a multilayered recordable optical recording medium is disclosed. When test recording is executed in a multilayered recordable optical recording medium having N recording layers (N is an integer of 2 or more), a test recording range in a test recording area of an (m+1)^th recording layer is shifted relative to a test recording range in a test recording area of an m^th recording layer by an amount greater than a difference of decentration amounts between the m^th and the (m+1)^th recording layers or a maximum decentration amount in the N recording layers. The shifting direction is inverse to a test recording range adding direction in a radius direction of the recording medium.

Claims

1. A method of recording data in a multilayered recordable optical recording medium having N (N is an integer of 2 or more) recording layers each of which layers includes a test recording area where test recording is executed for obtaining an optimum recording condition for actual recording, and which method includes a data recording step in which data are sequentially recorded in the recording layers from a first recording layer at a farthest position to an N^th recording layer at a nearest position viewed from a recording and reproducing laser beam inputting direction in order, comprising:

a test recording executing step which sequentially executes test recording in recordable recording layers having unrecorded parts from a p^th recording layer (1≦

p≦

N) at a farthest position in the recordable recording layers to an arbitrary q^th recording layer (p≦

q≦

N) in the recordable recording layers at the farthest position to the nearest position viewed from the recording and reproducing laser beam inputting direction;

a test recording range using step which sequentially uses a plurality of test recording ranges formed by dividing the test recording area in a radius direction from one end to the other end of the recording medium in each of the recording layers (hereinafter this direction is referred to as a test recording direction); and

a shifting step which shifts the test recording range of an (m+1)^th recording layer by a predetermined shifting distance relative to the test recording range of an m^th recording layer in a direction inverse to the test recording direction.

2. The method of recording data in the multilayered recordable optical recording medium as claimed in claim 1, wherein:

the shifting step shifts the test recording range of the (m+1)^th recording layer by the predetermined shifting distance relative to the test recording range of the m^th recording layer in a direction equal to the test recording direction.

3. The method of recording data in the multilayered recordable optical recording medium as claimed in claim 1, wherein:

when the test recording is executed in the m^th recording layer, the test recording ranges of the (m+1)^th recording layer through the N^th recording layer at a position where the test recording is executed in the radius direction of the recording medium are unrecorded statuses.

4. The method of recording data in the multilayered recordable optical recording medium as claimed in claim 1, wherein:

the predetermined shifting distance is greater than a difference of decentration amounts between the m^th recording layer and the (m+1)^th recording layer.

5. The method of recording data in the multilayered recordable optical recording medium as claimed in claim 4, wherein:

information of the decentration amounts has been recorded in an arbitrary recording layer, or in a BCA (burst cutting area) of the recording medium beforehand.

6. The method of recording data in the multilayered recordable optical recording medium as claimed in claim 4, further comprising:

a decentration information detecting step which detects information of the decentration amounts of the m^th recording layer and the (m+1)^th recording layer by obtaining push-pull signals of the m^th recording layer and the (m+1)^th recording layer before executing the test recording.

7. The method of recording data in the multilayered recordable optical recording medium as claimed in claim 6, wherein:

the decentration information detecting step measures the number of the push-pull signals at the tracking OFF time, or measures remaining error amounts of the push-pull signals at the tracking ON time.

8. The method of recording data in the multilayered recordable optical recording medium as claimed in claim 1, wherein:

when a maximum decentration amount in the N recording layers of the recording medium is defined as “

w”

, the predetermined shifting distance is greater than the “

w”

.

9. The method of recording data in the multilayered recordable optical recording medium as claimed in claim 8, wherein:

information of the decentration amounts has been recorded in an arbitrary recording layer, or in a BCA of the recording medium beforehand.

10. The method of recording data in the multilayered recordable optical recording medium as claimed in claim 8, further comprising:

a decentration information detecting step which detects the maximum decentration amount “

w”

by obtaining push-pull signals of all the recording layers before executing the test recording.

11. A recording and reproducing apparatus for recording data in a multilayered recordable optical recording medium having N (N is an integer of 2 or more) recording layers each of which layers includes a test recording area where test recording is executed for obtaining an optimum recording condition for actual recording, and which sequentially records the data in the recording layers from a first recording layer at a farthest position to an N^th recording layer at a nearest position viewed from a recording and reproducing laser beam inputting direction in order, comprising:

a test recording executing unit which sequentially executes test recording in recordable recording layers having unrecorded parts from a p^th recording layer (1≦

p≦

N) at a farthest position in the recordable recording layers to an arbitrary q^th recording layer (p≦

q≦

N) in the recordable recording layers at the farthest position to the nearest position viewed from the recording and reproducing laser beam inputting direction;

a test recording range using unit which sequentially uses a plurality of test recording ranges formed by dividing the test recording area in a radius direction from one end to the other end of the recording medium in each of the recording layers (hereinafter this direction is referred to as a test recording direction); and

a shifting unit which shifts the test recording range of an (m+1)^th recording layer by a predetermined shifting distance relative to the test recording range of an m^th recording layer in a direction inverse to the test recording direction.

12. The recording and reproducing apparatus as claimed in claim 11, wherein:

the shifting unit shifts the test recording range of the (m+1)^th recording layer by the predetermined shifting distance relative to the test recording range of the m^th recording layer in a direction equal to the test recording direction.

13. The recording and reproducing apparatus as claimed in claim 11, wherein:

when the test recording is executed in the m^th recording layer, the test recording ranges of the (m+1)^th recording layer through the N^th recording layer at a position where the test recording is executed in the radius direction of the recording medium are unrecorded statuses.

14. The recording and reproducing apparatus as claimed in claim 11, wherein:

the predetermined shifting distance is greater than a difference of decentration amounts between the m^th recording layer and the (m+1)^th recording layer.

15. The recording and reproducing apparatus as claimed in claim 14, wherein:

information of the decentration amounts has been recorded in an arbitrary recording layer, or in a BCA of the recording medium beforehand.

16. The recording and reproducing apparatus as claimed in claim 14, further comprising:

a decentration information detecting unit which detects information of the decentration amounts of the m^th recording layer and the (m+1)^th recording layer by obtaining push-pull signals of the m^th recording layer and the (m+1)^th recording layer before executing the test recording.

17. The recording and reproducing apparatus as claimed in claim 11, wherein:

when a maximum decentration amount in the N recording layers of the recording medium is defined as “

w”

, the predetermined shifting distance is greater than the “

w”

.

18. The recording and reproducing apparatus as claimed in claim 17, wherein:

information of the decentration amounts has been recorded in an arbitrary recording layer, or in a BCA of the recording medium beforehand.