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Destination sector search method of storage medium and its fetch device

A technology for storage media and reading devices, applied in tracking/alignment, driving/moving recording heads, digital recording/reproduction, etc., can solve problems such as inability to completely check out ID errors

Inactive Publication Date: 2003-03-05
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because this existing method uses the LED to verify whether the ID is correct at the demodulation device 11, and cannot completely check out the error of the ID, and may mistake the wrong ID for the correct ID, so that even if the ID error can be found later when ECC decoding , It also takes a lot of time to find the target sector again. As far as general DVD disc drives are concerned, the time required to find the target sector is about 25 to 80 times the time required for decoding ECC data blocks

Method used

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  • Destination sector search method of storage medium and its fetch device
  • Destination sector search method of storage medium and its fetch device
  • Destination sector search method of storage medium and its fetch device

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Embodiment Construction

[0020] First, see Figure 4 Shown is a schematic circuit block diagram of a preferred embodiment of the present invention, the method for searching the target sector in this embodiment is carried out in a storage medium reading device 2, to correctly search for a target sector in a storage medium 20 . The storage medium reading device 2 is used as a bridge between the storage medium 20 and a host that plays the storage medium 20 to read out the data stored in the storage medium 20 and transmit it to the host for playback. And the storage medium reading device 2 is a DVD disc player in this embodiment, and the storage medium 20 accessed by it is an optical disc (such as optical storage media such as DVD, VCD or CD). Usually, when data is stored on the optical disc 20, a data sector (data sector) 200 is used as the basic storage unit to be sequentially stored on the optical track of the optical disc, such as Figure 5 As shown, the data sector 200 includes a data identificatio...

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Abstract

The invention refers to a searching method for destination sector of memory media and the reading device, thereof, the device includes a demodulator, a data buffer section and decoding device of default correcting code, it read a data sector in memory media to the demodulator or inder to form a default correcting code data sector, and it sends them to the data buffer section and the decoding device respectively, it uses the decoding device to carry out identification mark testing to the default correcting code data sector in advance, it avoids the condition of reading the default data when itreally carries out the data decoding happnes, so it can read the data quickly and exactly.

Description

technical field [0001] The invention relates to a method for searching a target sector of a storage medium and a reading device thereof, in particular to a method for searching a target sector for rapidly and correctly reading data and a reading device thereof. Background technique [0002] When the optical disc drive reads a data sector from the optical disc, it must first confirm whether it is the target sector it is looking for, or whether it is the correct target sector, so as not to catch the wrong data sector for processing. decoding. However, due to the process of disc compression or other factors, the identification code (ID) in the data sector stored on the optical disc is often wrong, or the identification code of other data sectors is wrong but just becomes the target sector. The identification code of the area, so that when the CD-ROM finally finds the target sector and starts to decode, it finds that the target sector is wrong and must s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/10G11B21/10
Inventor 谢嘉鸿
Owner MEDIATEK INC
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