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Recording medium, recording method, and recording apparatus

A recording medium, recording method technology, applied in the direction of optical recording/reproducing/erasing method, optical record carrier, record carrier type, etc., can solve the problem of not fully considering the recording position of multi-rewrite data, etc.

Inactive Publication Date: 2005-06-08
SONY CORP
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  • Claims
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Problems solved by technology

So far, the recording position of multi-write data has not been sufficiently considered

Method used

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  • Recording medium, recording method, and recording apparatus
  • Recording medium, recording method, and recording apparatus
  • Recording medium, recording method, and recording apparatus

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[0042] Best Mode for Carrying Out the Invention

[0043] The present invention is described below. 1 and 2 show several examples in the case where the present invention is applied to a disc-shaped recording medium (abbreviated as a disc). FIG. 1 shows a situation where predetermined data A is overwritten on a disc on which tracks have been concentrically formed. Assuming that the number of multiple writes is set to n, the same data A is recorded on the disk 1 、A 2 ,...,A n . Examples of n=2, n=3, n=4, n=5 and n=6 are shown in FIG. 1 .

[0044] The angular interval θ of multiple data to be overwritten is selected as (θ=360° / n). That is, select (n=2: θ=180°), (n=3: θ=120°), (n=4: θ=90°), (n=5: θ=72°) and ( n=6: θ=60°). The value of the angular interval θ does not have to coincide exactly with every value, it is sufficient that every value of θ substantially coincides.

[0045] By selecting the value of the above-mentioned angular interval θ, the distance between multipl...

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Abstract

Payload 0 as a header is recorded in the header of the UDI area. In the case of recording payload 0 and other payloads, each of them is recorded five times in order to take countermeasures against errors. After payload 0, other payloads such as payload 1 etc. are recorded. In the case of recording five times, payloads of the same payload number are collectively recorded five times. The UDI is recorded from a position one second after the start time S. Payloads are arranged at 12-frame intervals. Thus, the five data to be overwritten are not arranged in the radial direction of the disc, but are widely distributed over the tracks. Improve the ability to prevent errors. The data interval is set to an optimum value according to the number of times of overwriting, the linear velocity, the recording position on the disc, and the like.

Description

technical field [0001] The present invention relates to a recording medium, a recording method and a recording apparatus applied when data is overwritten on the recording medium. Background technique [0002] In the case of recording desired data on a recording medium, a method of repeatedly recording (overwriting) the same data to improve data error resistance is known. Due to multiple writing, if there is at least one correct data among a plurality of data, this correct data can be used as error-free data. Hitherto, the recording position of multi-write data has not been sufficiently considered. Contents of the invention [0003] In order to solve the above problems, according to the invention of claim 1, there is provided a recording medium for recording data spirally or concentrically, [0004] Among them, predetermined data is repeatedly recorded in the circumferential direction at almost constant intervals. [0005] According to the invention of claim 11, there is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/007G11B20/00G11B20/10G11B20/12G11B20/18G11B27/034G11B27/30
CPCG11B20/00086G11B20/0071G11B20/1217G11B20/1252G11B20/1803G11B27/034G11B27/3063G11B2220/20G11B2220/2545G11B2220/2583G11B7/007G11B7/0045G11B20/12G11B20/10
Inventor 佐古曜一郎猪口达也
Owner SONY CORP
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