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Data recording medium, and data recording method and apparatus

A recording method and recording medium technology, applied in data recording, digital recording/reproduction, recording signal processing, etc., can solve the problem of not being able to prevent content data from being copied

Inactive Publication Date: 2004-08-18
SONY CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the content data on the original disc cannot be prevented from being copied to the CD-R disc

Method used

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  • Data recording medium, and data recording method and apparatus
  • Data recording medium, and data recording method and apparatus
  • Data recording medium, and data recording method and apparatus

Examples

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Embodiment Construction

[0033] Embodiments of the present invention are described below. The present invention provides a recording medium, such as a compact disc, on which a predetermined data pattern is recorded. The predetermined data pattern includes low level data as an audio signal. When a predetermined data pattern is encoded by a conventional encoder, the accumulated value of DSV deviates from a predetermined value. When the data pattern part is encoded by the dedicated encoder, the accumulated value of DSV is within said predetermined range.

[0034] After predetermined data patterns are appended to the audio signals, they are EFM-modulated by a dedicated encoder in such a way that the accumulated value of DSV is within said predetermined range. The modulated signal is recorded as a recording signal on a disc to be produced. In the case of a digital audio signal modulated by linear PCM (Pulse Code Modulation), 16-bit data is expressed in 2's complement for each byte, and recorded. Thus, ...

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Abstract

A recording method for converting m-bit data into n-bit (where n>m) bit data whose run length is restricted and recoding the converted data on a recording medium, the recording method comprising the steps of when at least preceded data is data containing a special data pattern, lightening the restriction of the run length; and recording data so that the cumulative value of DC components per unit time increase when the data is reproduced in the state that the run length is restricted.

Description

technical field [0001] The present invention relates to a data recording medium and a data recording method, as well as devices usable, for example, for read only memory (ROM) type optical discs. Background technique [0002] Optical discs such as CDs (Compact Discs) and CD-ROMs (Compact Discs Read Only Memory) are widely used as storage media for recording data because they are easy to handle and relatively low-cost to produce. In recent years, a CD-R disc (Compact Disc Recordable) on which data can be recorded once and a CD-RW disc (Compact Disc Rewritable) on which data can be rewritten have appeared. Thus, data can be easily recorded on such a recordable optical disc. As a result, optical discs conforming to the CD standard, such as CD-DA discs, CD-ROM discs, CD-R discs, and CD-RW discs, have become the mainstream of data recording media. Furthermore, in recent years, audio data has been compressed in accordance with MP3 (MPEG1 Audio Layer-3) and ATRAC (Adaptive Transf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/91G11B20/10G11B20/14H03M5/14H03M7/14
CPCG11B2020/1461H03M5/145G11B20/1426G11B20/10G11B20/14
Inventor 佐古曜一郎猪口达也木原隆古川俊介金田赖明斋藤昭也会田桐佐野达史三好义郎碓水吉伸先纳敏彦
Owner SONY CORP