News Column

Patent Issued for Optical Disc Drive and Method of Accessing Optical Disc

June 17, 2014

By a News Reporter-Staff News Editor at China Weekly News -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Liu, Yaohua (Shenjen, CN); Lin, Chia-Feng (Hsinchu, TW); Liu, Wenhua (Shenjen, CN), filed on February 27, 2012, was published online on June 3, 2014.

The assignee for this patent, patent number 8743669, is Mediatek Singapore Pte. Ltd. (Singapore, SG).

Reporters obtained the following quote from the background information supplied by the inventors: "The present invention relates to an optical disc drive, and in particular relates to an optical disc drive that is externally coupled to a low-end host.

"Low-end electronic devices are generally limited to a few specific data formats, for example, limited to a FAT 32 (File Allocation Table 32) file system format. Thus, external devices to be coupled to a low-end electronic device are restricted in terms of comporting to the specific data format.

"Generally, data is recorded on an optical disc in the ISO 9660 or UDF file system format. However, some cost-reduced multimedia display systems (e.g. digital television) are incapable of recognizing data or files of the ISO 9660 file system format or the UFD file system format and therefore are incapable of coupling to an external optical disc drive, which is very inconvenient. Thus, it is desirable to provide optical disc drives capable of outputting data of the FAT 32 file system format."

In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventors' summary information for this patent: "In view of the foregoing, the invention provides technical solutions as follows.

"An optical disc drive in accordance with an exemplary embodiment of the invention is shown. The optical disc drive comprises an I/O port, an optical pickup module and a format conversion unit. The I/O port is operative to couple the optical disc drive to a host to receive a read command that complies with a host terminal file system format. The optical pickup module is operative to access an optical disc containing data of a first file system format. The format conversion unit is coupled between the I/O port and the optical pickup module and comprises a mapping information generation module, a memory module and a read-command processing module. The mapping information generation module controls the optical pickup module to access the optical disc and thereby generates mapping information. The memory module stores the mapping information. By referring to the mapping information, the read-command processing module controls the optical pickup module to access data requested by the read command.

"An optical disc accessing method is further shown in accordance with an exemplary embodiment of the invention, which comprises: a) receiving a read command from a host, wherein the read command complies with a host terminal file system format used in the host; b) accessing an optical disc of the optical disc drive and generating mapping information of data accessed from the optical disc, wherein the data recorded on the optical disc has a first file system format that is different from the host terminal file system format, c) storing the mapping information in a memory module, and d) accessing the data, requested by the read command, from the optical disc by referring to the mapping information stored in the memory module.

"The disclosed optical disc drive and the optical disc accessing method convert the format of the files stored in an optical disc to allow a cost-reduced host which uses a file system format distinct from that of the optical disc to access the optical disc."

For more information, see this patent: Liu, Yaohua; Lin, Chia-Feng; Liu, Wenhua. Optical Disc Drive and Method of Accessing Optical Disc. U.S. Patent Number 8743669, filed February 27, 2012, and published online on June 3, 2014. Patent URL:

Keywords for this news article include: Asia, Mediatek Singapore Pte. Ltd..

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Source: China Weekly News

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