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Playback device, playback method and program

A technology of power and conditions, applied in beam guiding devices, recording/reproducing with optical methods, instruments, etc., can solve the problems that have not fully met the demand for increased capacity, and achieve the effect of safe reproduction

Inactive Publication Date: 2012-01-11
SONY CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In practice, however, the need for increased capacity has not been fully met

Method used

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  • Playback device, playback method and program
  • Playback device, playback method and program
  • Playback device, playback method and program

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Embodiment Construction

[0021] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Note that, in this specification and the appended drawings, structural elements that have substantially the same function and structure are denoted with the same reference numerals, and repeated explanation of these structural elements is omitted.

[0022] 1. Overview of playback methods

[0023] First, refer to figure 1 An overview of the playback method according to the embodiment of the present invention will be described. The playback method according to the embodiment of the present invention allows data security in the multi-layer disc D to be performed even with different reproducing powers P (P is a general term for reproducing power) depending on the recording layer L (L is a general term for recording layers). reproduce.

[0024] Such as figure 1 As shown, in the playback method according to the embodiment of the present inve...

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Abstract

A playback device of present invention includes a power switching portion that, when the necessity of switching of the reproducing condition is detected, switches the reproducing power to a minimum power which does not damage the data recorded on the multi-layer recording medium and with which the address of the reproducing target data can be read out, and when it is confirmed after the switching of the reproducing condition that the address read out with the minimum power matches the address of the reproducing target data, switches the reproducing power to the optimum power that corresponds to the reproducing condition after the switching, based on the power setting information.

Description

technical field [0001] The invention relates to a playback device, playback method and program. Background technique [0002] In recent years, there has been a need to increase the capacity of optical discs such as DVD, HD-DVD, Blu-ray Disc, and the like. Specifically, in the Blu-ray Disc, a two-layer disc having a storage capacity of 50 GB has been realized. In practice, however, the demand for increased capacity has not been fully met. Therefore, in order to further promote the increase in capacity, practical use of multilayer disks such as triple layer disks and quadruple layer disks is now being proposed (for example, refer to Japanese Patent Application Publication No. JP-A-2009-140580). Contents of the invention [0003] In the multi-layer disc standard for Blu-ray Disc, it is recommended to reproduce data using laser beams of different reproduction powers depending on recording layers. A relatively large gap of reproduction power is set between the respective rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B27/26G11B7/135
CPCG11B2007/0013G11B7/08529G11B7/1263
Inventor 田村高明
Owner SONY CORP