Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Operating optical drive using parameters

A drive and optical technology, applied in the direction of optical recording/reproduction, optical recording system, optical recording/reproduction/erasing method, etc., can solve problems such as failure

Inactive Publication Date: 2008-06-04
KONINKLIJKE PHILIPS ELECTRONICS NV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During start-up, the channel model of a given disk is unknown to the Viterbi detector and may also fail if its default channel model (programmed at the factory) deviates too much from the actual channel response associated with a given disk

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Operating optical drive using parameters
  • Operating optical drive using parameters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] Figure 1 schematically illustrates an optical drive device 1 capable of reading information from and / or writing information to an associated optical record carrier.

[0036] A practical optical drive device includes many elements with various functions, only some of which are described herein. Motor means 8, 10 are provided for rotating the disk 11 and controlling the movement of the optical pickup unit 5 so that the light spot 3 can be focused and located at a desired position on the disk. The optical pickup unit comprises a laser 6, various optical elements and a photodetector 7 for reading the optical effects on the disc. The focused laser is powerful enough in recording mode to provide optical action to the disc. Optionally, the laser power is insufficient to cause physical changes in the read mode.

[0037] Control of the storage device may be done by hardware implementations, such as those shown by motor control 9 and optical system control 2 . In addition, a m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to operating an optical drive apparatus from parameters read from an associated record carrier. Data-aided adaptation loops are often used in modern communication and storage systems. To ensure fast and robust start-up by ensuring a stable starting point in an adaptation loop and a fast convergence of the adaptation loop, an information data field is provided on, and read from by the drive, an associated optical record carrier. The information data field comprising start-up parameters, the start-up parameters comprising information about recommended write parameters and information related to a resulting channel response for the case when the recommended write parameters are used. In a start-up situation of the optical drive apparatus, the channel response of the bit detector is computed based on the start-up parameters.

Description

field of invention [0001] The present invention relates to the operation of an optical drive device, more particularly to operating an optical drive device according to parameters read from an associated record carrier. Background technique [0002] Data-assisted adaptation loops are frequently used in modern communication and storage systems. Also, non-data-aided alternatives are available in some cases, but they are not competitive. For example an Ultra High Density Blu-ray Disc system with a high density of channel bit lengths below 60nm. [0003] Reliable data decisions must be fed to the data-aided adaptation loop, as the loop becomes unstable in the case of poor-quality data decisions, which in turn may lead to the collapse of the entire system. This issue is especially important during system start-up, when most of the adaptation loops have not been set up. In order to solve the above problems and ensure reliable startup of the adaptation loop, it is possible to wr...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/10G11B7/00
CPCG11B7/00456G11B7/005G11B7/00736G11B7/0062G11B7/00G11B7/09G11B20/10G11B20/14
Inventor A·帕迪伊
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com