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Method for fast verification of sector addresses

一种段地址、快速的技术，应用在快速验证段地址领域，能够解决降低性能、微控器巨大工作负荷等问题

Inactive Publication Date: 2005-02-02
THOMSON LICENSING SA
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  • Description
  • Claims
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Problems solved by technology

This results in a huge workload for the microcontroller and reduces its performance for other tasks

Method used

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  • Method for fast verification of sector addresses
  • Method for fast verification of sector addresses

Examples

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Embodiment Construction

[0036] figure 1 A drive for a recording medium 1 such as an optical recording medium or a hard disk is briefly shown. Processing blocks 7, 10, 13 related to the present invention are shaded. The system is divided into a physical recording medium 1 and a data processing hardware unit 14, also called a front end IC.

[0037] The acquisition block 3 reads out the serial bit data stream 2 from the recording medium 1 . In this block, data is synchronized with the unit's system clock. Typically, the synchronization data 4 is provided in parallel to an error correction block 5, eg a Reed-Solomon error correction block. The error correction block 5 separates all user data and segment ID information 6,8 from the channel data streams 2,4. An additional block 7 picks up and saves the current segment ID 9 from the remaining user data stream 6 to check its validity.

[0038] Then, the user data 8 with the valid segment ID is provided to an interface (not shown) to the system backend (...

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Abstract

A method and a device for the fast verification of sector addresses (9) in a data stream (2) obtained from a recording medium (1) upon a request from a microcontroller (13), the method comprising the steps of: reading the data stream (2) from the recording medium ; decoding the data stream to obtain a decoded data stream comprising user data (6) and sector addresses (9); comparing the sector addresses (9) with a range (12) of valid sector addresses; and transmitting only user data (8) having sector addresses (9) within the range (12) of valid sector addresses; whereby dedicated comparing means (10) are provided for performing the comparing step independently of the microcontroller (13).

Description

technical field [0001] The present invention relates to a method and apparatus for rapidly verifying segment addresses in a data stream obtained from a recording medium, and to a method and apparatus for reading from and / or recording to a recording medium using such a method or apparatus. The device to which the media is written. Background technique [0002] In many applications today, large amounts of data need to be stored. For this purpose, in the field of personal computers and also in the field of consumers, electronic hard disks are commonly used as fixed storage media and optical disks as removable storage media. Due to the need for increased data bandwidth (HDTV, fast copy), the data throughput rate of applications will continue to increase. Therefore, the corresponding magnetic disk device must also provide appropriate data and data bandwidth. Therefore, various high-density optical recording media have been developed, such as a digital versatile disc (DVD) or a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06G11B20/10G11B20/18G11B27/30G11B27/36
CPCG06F3/0638G06F3/0656G11B27/36G06F3/061G11B27/3027G06F3/0677G06F3/0658G11B20/10
Inventor 托马斯·布鲁恩
Owner THOMSON LICENSING SA
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