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Method for providing an output signal for storing of user data on a data carrier

A technology of user data and output signals, which is applied in the directions of information storage, record information storage, data recording, etc., and can solve the problems of increasing stability of the control loop

Inactive Publication Date: 2008-04-02
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to reliably sample the laser signal at a sufficiently high rate
As a result, control loop stability becomes more and more of an issue as write speeds increase

Method used

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  • Method for providing an output signal for storing of user data on a data carrier
  • Method for providing an output signal for storing of user data on a data carrier
  • Method for providing an output signal for storing of user data on a data carrier

Examples

Experimental program
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Embodiment Construction

[0028] Fig. 1 shows a flow chart of a first method according to the invention. The method consists of three main steps. In an input step 11 user data is received. User data can be analog or digital. User data may include any information one wishes to store on the record carrier, such as music, video or financial data etc. In an encoding step 12, the user data is encoded according to a predetermined encoding scheme. During encoding, additional detectable signal elements are provided in the encoded user data to limit the distance between detectable elements. In a conversion step 13, the encoded user data is converted into an output signal. The output signal can be used by a storage device, such as a DVD+R writer, to store encoded data on a data carrier. In general, all storage devices that encode data using a predetermined encoding scheme that results in encodings with irregular distances between detectable signal elements having equal signal values ​​and at least a predete...

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Abstract

A method for providing an output signal (58) for storing of user data on a data carrier (37) is provided. The method comprises the steps of receiving (11) the user data, encoding (12) the user data according to a predetermined encoding scheme and converting (13) the encoded user data to the output signal (58). The encoding according to the predetermined encoding scheme results in irregular distances between detectable signal elements which have equal signal values and at least a predetermined run length. However for some control loops, said distances should not be too large. According to the invention the step of encoding comprises providing (14b, 15b) additional detectable signal elements in the encoded user data in disagreement with the encoding scheme. Thereby the method results in limiting the distance between the detectable signal elements.

Description

technical field [0001] The invention relates to a method of providing an output signal for storing user data on a data carrier, the method comprising the steps of: receiving user data; encoding the user data according to a predetermined encoding scheme such that at Obtaining irregular distances between detectable signal elements of width; and converting encoded user data into an output signal. [0002] The invention also relates to a device for carrying out the method and a data carrier comprising user data stored using the method. Background technique [0003] In a device for writing data on a data carrier such as a CD or DVD, user data is usually encoded according to some standard encoding scheme. When this standard encoding mechanism is used to store user data, the user data can then be retrieved using standard reading equipment. After encoding, the encoded data is converted into a converted signal. The converted signal is used to drive laser power for writing data on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/14
CPCG11B2020/1465G11B2020/1457G11B20/1426G11B20/10G11B20/14
Inventor C·W·C·M·斯穆尔德斯J·范伦斯
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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