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Data reproducing method and appts., and recording and/or reproducing data method and appts.

A technology for data and recording media, applied in the directions of data representation error detection/correction, digital recording/reproduction, digital signal error detection/correction, etc., can solve problems such as inability to achieve efficient decoding and deterioration of decoding error rate.

Inactive Publication Date: 2005-05-11
SONY CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0047] Therefore, in this magnetic recording and / or reproducing apparatus 200, it is necessary to use a binary signal of bi-level (bi-level) therein, and the amount of information in the signal is intentionally reduced, and as a result, efficient decoding cannot be realized, making Decoding Error Rate Deterioration

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  • Data reproducing method and appts., and recording and/or reproducing data method and appts.
  • Data reproducing method and appts., and recording and/or reproducing data method and appts.
  • Data reproducing method and appts., and recording and/or reproducing data method and appts.

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Embodiment Construction

[0077] Referring to the drawings, preferred embodiments of the present invention will be described in detail below.

[0078] The present apparatus is directed to a recording system for recording data on recording media of a magnetic recording system, such as a hard disk or a so-called DCVR (Digital Video Cassette Recorder), and a reproduction system for reproducing data recorded on these recording media magnetic recording and / or reproducing apparatus.

[0079] This magnetic recording and / or reproducing apparatus uses a soft-input soft-output type (SISO type) modulation-decoder as a modulation-decoder for modulating and decoding a modulation-encoded signal, and the modulation-decoder receives soft-input data and outputs soft-input data. Output Data.

[0080] First, the magnetic recording and / or reproducing apparatus of the first example is explained. Here, reference is made to a SISO-type modulation-decoder as a modulation-decoding apparatus for a reproducing system of such a...

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Abstract

A magnetic recording and / or reproducing apparatus that performs efficient decoding to reduce a decoding error rate includes a modulation SISO decoder 63 that modulates and decodes data modulated and encoded by the modulation encoder 52 in a predetermined manner. The modulated SISO decoder 63 is a soft-input soft-output (SISO) type modulation decoder that receives a soft input signal and outputs a soft output signal. The modulation SISO decoder 63 receives the trellis structure soft output signal D64 provided by the trellis structure SISO decoder 62 to obtain a soft decision value for error correction. The coded data D52 is transmitted to the modulation encoder 52 of the recording system to generate modulation The soft decision signal D65. Modulation SISO decoder 63 sends signal D65 to error correction soft decoder 64 on the downstream side.

Description

technical field [0001] The present invention relates to a method and apparatus for reproducing data recorded on a recording medium and a method and apparatus for recording and / or reproducing data to the recording medium. Background technique [0002] As recording media for recording digital data, there are known recording media of magnetic, optical or magneto-optical systems, such as hard disks, so-called DVCRs (Digital Video Cassette Recorders) or so-called CDs (Compact Discs), DVDs (Digital Versatile Optical Disc) and so-called MO (Magnetic Optical Disc). [0003] In order to record signals on these recording media, physical processing needs to be performed on the recording media, such as for the recording medium of the magnetic recording system by controlling the magnetization direction by the write head, or for the recording medium of the optical recording system by forming the corresponding The length of the groove for the signal. In this case, in order to allow ampli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B20/14G11B20/10G11B20/18H03M7/14H03M13/29H03M13/39H03M13/41H03M13/45
CPCG11B20/10H03M13/2972H03M13/6325
Inventor 服部雅之宫内俊之村山淳
Owner SONY CORP