Write control parameter optimizing apparatus, write control parameter optimizing method, recording apparatus, and recording method
A technology for recording equipment and write control, which is applied in digital recording/reproduction, digital recording, optical recording heads, etc., and can solve the problems of poor mass production capacity of drives and differences in characteristics of recording media and drives that cannot be ruled out.
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no. 1 example
[0069] figure 1 The diagram of shows a general process when recording digital master data (recording digital data) in a recording medium such as a DVD. Recording digital data supplied from the outside is arranged at the data control unit 1R. The arranged digital data is divided into pack data in units of 2K bytes (2KB) at the sectorization unit 2R. At the sectorization unit 2R, 4-byte EDC as an error detection code is generated for data in units of 2 KB, and added to the packet data. Each item of 2KB packet data (with EDC) is sent to the scrambling unit 3R to perform a process of generating random data, which is a process for stabilizing the disc servo after recording. The transmitted packet data is scrambled. For the scrambled 2KB packet, header information such as a sector ID is added by the header information adding unit 4R, and the added header information is sent to the error correction coding block (ECC block) generating unit 5R. Although the order of scrambling proc...
no. 2 example
[0135] The block diagram of the second embodiment is not shown here because it is the same as that of the first embodiment.
[0136] As described above, according to the present invention, recording and restoration are performed without a feedback system, jitter is detected, and then optimal parameter values are obtained while recording and restoration are performed again based on the detection results, unlike conventional techniques. Therefore, by applying to general recording and restoration operations, it is also possible to correct changes in the optimum values of the write control parameters caused by the fact that the positions of the test area and the actual data recording and restoration area are different from each other. A second embodiment for realizing such correction is described below.
[0137] The following system is used in the second embodiment. according to Figure 10A and 10B The illustrated technique sets the initial value of the optimum value of the...
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