Record medium, and method for recording to and reproducing from a record medium

• US 5,675,586 A
• Filed: 09/11/1995
• Issued: 10/07/1997
• Est. Priority Date: 09/12/1994
• Status: Expired due to Term

• Current Assignee: Retro Reflective Optics LLC
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Sako, Yoichiro, Yamagami, Tamotsu, Otsuka, Satoshi, Tobita, Minoru
• Primary Examiner(s): Baker, Stephen M.
• Application Number:
  US08/526,641
• Time in Patent Office: 757 Days
• Field of Search: 371/37.5, 371/2.1, 371/40.1
• US Class Current: 714/701
• CPC Class Codes: G11B 20/1258 where blocks are arranged within multiple radial zones, e.g. Zone Bit Recording or Constant Density Recording discs, MCAV discs, MCLV discs
• CPC Class Codes: G11B 20/1816 Testing
• CPC Class Codes: G11B 20/1833 by adding special lists or symbols to the coded information G11B20/1806, G11B20/1866 take precedence
• CPC Class Codes: G11B 2020/1282 in embedded servo fields
• CPC Class Codes: G11B 27/19 by using information detectable on the record carrier
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: G11B 7/00745 Sectoring or header formats within a track formats in general G11B20/12

Abstract

Method of recording on a record medium by receiving a series of data elements, adding error detection and error correction data to each data element, moving some of the data in each data element to an adjacent data element to produce arranged data elements, and recording the arranged data elements in different sectors on a record medium. Upon reproduction of the arranged data elements from a record medium, some of the data in each arranged data element are moved to an adjacent data element to produce rearranged data elements. Errors in each rearranged data element are detected and corrected using data contained therein. A record medium having concentric tracks on which a plurality of sectors are located stores data in each of the sectors. The data in each sector pertains to two different sectors so that the affect of a burst error on a particular sector is minimized.

Claims

1. A method of recording successive data elements on a record medium, comprising the steps of:

receiving said data elements, each of the data elements having a plurality of data;

adding to each data element error detection and error correction data derived from the data element;

transferring some of the data in a respective data element to a different data element to produce arranged data elements; and

recording each of said arranged data elements in a respectively different region of said record medium.

2. The method of claim 1, wherein said some of the data in a respective data element are transferred to corresponding locations in said different data element.

3. The method of claim 1, wherein each said arranged data element is formed of data derived from two received data elements.

4. The method of claim 1, wherein said data elements are received in pairs, each pair including an odd-numbered data element and an even-numbered data element;

and the step of transferring is carried out by swapping some of the data in the respective odd-numbered and even-numbered data elements in each said pair of data elements.

5. The method of claim 1, wherein the successive data elements include a first data element and a last data element;

and further comprising the step of adding identification data to said first and last data elements to identify those data elements as the first data element and last data element, respectively, in a series of arranged data elements.

6. The method of claim 1, wherein said error detection and error correction data in a respective data element are not transferred, such that said error detection and error correction data in each of said arranged data elements are derived from the data that had been transferred as well as from the data that remained in said data element.

7. The method of claim 1, wherein each of the arranged data elements is recorded in a respectively different sector on said record medium.

8. The method of claim 1, wherein said record medium includes a read-only area having a plurality of regions;

and each of the arranged data elements is recorded in a respectively different region of the read-only area of said record medium.

9. The method of claim 1, further comprising the step of dividing each data element into a succession of data units;

and wherein alternate data units in each said data element are transferred to said different data element.

10. The method of claim 9, wherein each said alternate data unit in a respective data element is transferred to a corresponding location in said different data element.

11. The method of claim 1, wherein the transferred data includes some of said error detection and error correction data in said respective data element.

12. The method of claim 11, wherein said error detection and error correction data includes cyclic redundancy code data and Reed-Solomon codes, and the transferred error detection and error correction data comprises only said cyclic redundancy code data.

13. The method of claim 1, wherein said some of the data in a respective data element are transferred to a respectively adjacent data element in said successive data elements.

14. The method of claim 13, wherein the successive data elements include a first data element and a last data element;

and wherein some of the data in the last data element are transferred to a new data element.

15. The method of claim 14, further comprising the step of adding dummy data to locations in said new data element which do not receive data from said last data element.

16. The method of claim 14, further comprising the step of adding identification data to said new data element for identifying the new data element as a last data element in a series of arranged data elements.

17. A method of reproducing successive data elements recorded as arranged data elements on a record medium in which each arranged data element includes data from two respectively different unarranged data elements, comprising the steps of:

reproducing said successive arranged data elements from said record medium, each reproduced arranged data element having a plurality of data including error detection and error correction data;

transferring some of the data in a reproduced arranged data element to a different reproduced arranged data element to produce rearranged data elements;

detecting and correcting errors in each of said rearranged data elements in accordance with the error detection and error correction data in said rearranged data element; and

supplying the error corrected rearranged data elements as unarranged data elements.

18. The method of claim 17, wherein said some of the data in a respective arranged data element are transferred to corresponding locations in said different arranged data elements to produce said rearranged data elements.

19. The method of claim 17, wherein each said rearranged data element is formed of data derived from two arranged data elements.

20. The method of claim 17, wherein the successive data elements reproduced from the record medium are comprised of pairs of arranged data elements, each pair including an odd-numbered arranged data element and an even-numbered arranged data element;

and the step of transferring is carried out by swapping some of the data in the respective odd-numbered and even-numbered arranged data elements in each said pair of arranged data elements.

21. The method of claim 17, wherein said error detection and error correction data in a respective arranged data element are not transferred, such that said error detection and error correction data in each of said arranged data elements are derived from the data that had been transferred as well as from the data that remained in that arranged data element.

22. The method of claim 17, wherein said record medium includes a plurality of sectors;

and wherein each of the arranged data elements is reproduced from a different sector on said record medium.

23. The method of claim 17, wherein the successive arranged data elements reproduced from said record medium include a first arranged data element and a last arranged data element, each having identification data identifying the arranged data element as the first or last arranged data element, respectively, and further comprising the step of identifying said first and last arranged data elements as a function of the identification data therein.

24. The method of claim 23, wherein some of the data in each of the arranged data elements are transferred in accordance with the identification data in the first and last arranged data elements.

25. The method of claim 17, wherein each of the reproduced arranged data elements is comprised of a succession of data units;

and wherein alternate data units in a respective arranged data element are transferred to said different arranged data element.

26. The method of claim 25, wherein each said alternate data unit in a respective arranged data element is transferred to a corresponding location in said different arranged data element.

27. The method of claim 17, wherein the transferred data includes some of said error detection and error correction data in said respective arranged data element.

28. The method of claim 27, wherein said error detection and error correction data includes cyclic redundancy code data and Reed-Solomon codes, and the transferred error detection and error correction data comprises only said cyclic redundancy code data.

29. The method of claim 17, wherein said some of the data in a respective arranged data element are transferred to a respectively adjacent arranged data element in said series to produce a series of rearranged data elements.

30. The method of claim 29, wherein the successive arranged data elements reproduced from said record medium include N+1 arranged data elements;

and wherein some of the data in the N+1th arranged data element are transferred to the Nth arranged data element to produce an Nth rearranged data element.

31. The method of claim 30, wherein the N+1th arranged data element includes dummy data at locations from which data were transferred to the Nth arranged data element;

and further comprising the step of removing the dummy data from said N+1th arranged data element so that only N rearranged data elements are produced.

32. A method of reproducing data recorded as arranged data elements on a record medium, comprising the steps of:

reproducing at least two arranged data elements from said record medium, each of said arranged data elements having a plurality of data including error detection and error correction data;

identifying in each of the reproduced arranged data elements data therein which is associated with a single rearranged data element, said rearranged data element containing data derived from both of the reproduced arranged data elements;

storing in a memory data included in a reproduced arranged data element which has been identified as being associated with said single rearranged data element and generating therefrom said single rearranged data element;

detecting and correcting errors in the generated single rearranged data element in accordance with the reproduced error detection and error correction data; and

supplying the error corrected single rearranged data element as an output.

33. A method of reproducing arranged data from a read-only, a writable or a hybrid record medium, comprising the steps of:

identifying the record medium as a read-only record medium, a writable record medium or a hybrid record medium, the latter having both read-only and writable regions;

identifying the read-only regions and the writable regions of said record medium when said record medium is identified as a hybrid record medium;

reproducing from said read-only or writable region arranged data elements containing error detection and error correction data;

transferring some of the data in a reproduced arranged data element to a different arranged data element to produce rearranged data elements when said data elements are reproduced from said read-only region;

providing each of said arranged data elements as said rearranged data elements when said data elements are reproduced from said writable region;

detecting and correcting errors in a rearranged data element in accordance with the error detection and error correction data in said each rearranged data element; and

supplying the error corrected rearranged data elements as an output.

34. The method of claim 33, wherein said some of the data in a respective arranged data element are transferred to corresponding locations in said different arranged data elements to produce said rearranged data elements.

35. The method of claim 33, wherein each said rearranged data element is formed of data derived from two arranged data elements.

36. The method of claim 33, wherein a series of arranged data elements is reproduced;

and said some of the data in a respective arranged data element are transferred to a respectively adjacent arranged data element in said series to produce a series of rearranged data elements.

37. The method of claim 33, wherein the series of arranged data elements includes N+1 arranged data elements;

and wherein some of the data in the N+1th arranged data element are transferred to the Nth arranged data element to produce an Nth rearranged data element.

38. The method of claim 33, wherein when said data elements are reproduced from said read-only region the N+1th arranged data element includes dummy data at locations from which data were transferred to the Nth arranged data element;

and further comprising the step of removing the dummy data from said N+1th arranged data element so that only N rearranged data elements are produced.

39. The method of claim 33, wherein pairs of arranged data elements are reproduced from said record medium, each pair including an odd-numbered arranged data element and an even-numbered arranged data element;

and the step of transferring is carried out by swapping some of the data in the respective odd-numbered and even-numbered arranged data elements in each said pair of arranged data elements.

40. A record medium having a read-only area at which data is stored, said read-only area including a plurality of sectors having stored therein data including error detection and error correction data, some of said data in each sector being derived from that sector and other data in said sector being derived from a different sector, and said error detection and error correction data in said sector being derived both from the data in that sector and from the data in said different sector.

41. The record medium of claim 40, wherein said other data in said sector is derived from an adjacent sector on said record medium.

42. A record medium having successive data recorded thereon, the record medium comprising a plurality of concentric tracks located between an outer periphery and an inner periphery of said record medium, each track having a plurality of equal angular servo areas having pit patterns for providing tracking and clock control, each servo area being followed by a plurality of data segments in which user data is recorded, said user data being partitioned into a plurality of sectors each containing a plurality of data segments, the user data in a respective sector including user data derived from that respective sector and user data derived from a sector adjacent the respective sector, each sector also containing parity data corresponding to the user data derived from said respective sector and corresponding to user data derived from the adjacent sector.

43. The record medium of claim 42, wherein first and last ones of said sectors in a track include predetermined identification data.

44. The record medium of claim 42, further comprising an additional sector in a track having user data stored therein derived from a last one of the plurality of sectors and also having dummy data stored therein.

45. The record medium of claim 42, wherein each pair of adjacent sectors comprises an odd-numbered sector and an even-numbered sector;

and user data in each of the odd-numbered and even-numbered sectors includes user data derived both the odd-numbered and even-numbered sector in said pair.