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Quick optical drive data acquisition method

A caching method and data technology, applied in the direction of memory address/allocation/relocation, etc., can solve the problems affecting the access efficiency of optical drives and low cache hit ratio.

Inactive Publication Date: 2004-07-28
LITE ON IT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] This method will not cause too many problems in sequential access optical drives, but in new optical disc technologies, such as the Universal Disc Format (UDF) used in CD-R or CD-RW optical drives, it is no longer a Sequential access to data, but random access to data, so the traditional cache hit ratio will be very low, affecting the access efficiency of the entire optical drive

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  • Quick optical drive data acquisition method
  • Quick optical drive data acquisition method
  • Quick optical drive data acquisition method

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Embodiment Construction

[0031] see figure 2 Shown is the circuit block diagram of the best embodiment of the optical drive of the present invention. The optical drive 1 of this embodiment can access the optical disc data 2, and transmit it to the host computer 3, the host computer 3 can be a computer, a central processing unit or a media access device, such as an audio card, a hard disk drive or another optical drive Wait.

[0032] The optical drive 1 includes: an optical disc access device 12 for accessing the optical disc data 2; a decoding chipset 13 for interpreting the data in the optical disc format into general digital data; a buffer memory 11 for temporarily storing The optical disc data 2 read by the optical disc access device 12, and store the digital data interpreted by the interpretation chipset 13; a data transmission device 14 is used to transmit the interpreted digital data to the host 3; And a microprocessor 15 is used to control the data exchange between the optical disc access de...

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Abstract

A method for fastly reading data from optical disc drive is characterized by that the maximal usable data storage space in the buffer of optical disc drive is used as the cache hit space. The data read from optical disc is stored in the first memory region of buffer, then in the second one after the data is explained, and finally in the third one after the data is sent to host. When the optical disc is read again, it is the first operation to find the needed data from the second and the third memory regions. If their is a match, the data is directly sent to host. If there is not, the data is read from optical disc.

Description

technical field [0001] The invention relates to a data cache method for an optical drive, in particular to a method for increasing data cache by calculating the maximum available data storage range of a buffer memory (Buffer) in the optical drive as the data range of a cache hit (CacheHit). The hit ratio improves the access efficiency of the optical drive. Background technique [0002] At present, with the advancement of optical drive manufacturing technology, optical drives are divided into CD-ROM, CD-R, CD-RW, DVD-ROM...etc. Most of the current optical drives have a data access speed of 20 times or higher , and the data access speed is calculated as a multiple of 150Kbps (1X) per second. For a CD-ROM drive with a multiple of 24 (24X), the data reading speed is 24 times that of 150Kbps (1X). That is 3,600Mbps per second, and the reading speed of 150Kpbs per second (1X) is set based on the playback speed of music CDs. [0003] However, this data access speed is for the seq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/06
Inventor 张国强
Owner LITE ON IT