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Patent Issued for Optical Disc Device and Optical Disc Recording/Reproducing Method

July 8, 2014



By a News Reporter-Staff News Editor at Information Technology Newsweekly -- According to news reporting originating from Alexandria, Virginia, by VerticalNews journalists, a patent by the inventors Mutsuro, Yasuo (Yokohama, JP); Nagai, Yutaka (Yokohama, JP); Nishimura, Koichiro (Sagamihara, JP); Ikeda, Masakazu (Odawara, JP); Kawamae, Osamu (Kawasaki, JP), filed on June 2, 2011, was published online on June 24, 2014.

The assignee for this patent, patent number 8760981, is Hitachi-LG Data Storage, Inc. (Tokyo, JP).

Reporters obtained the following quote from the background information supplied by the inventors: "The present invention relates to an optical disc recording/reproducing device and its operation method. More particularly, it relates to technologies effective to record/reproduce plural optical discs.

"In enterprises, government and municipal offices, SOHO (Small Office/Home Office), individuals, etc., there exists a general tendency that the information amount of electronic data to be processed is becoming larger and larger. In accompaniment with this trend, a medium for storing the larger volume of information is becoming absolutely necessary. Meanwhile, people also tend to hang up 'Green IT (Information Technology)' as keyword and introduce a lower-power-consumption appliance for the earth's environment protection. In a situation like this, attention has been focused on an optical disc as the above medium for storing the larger volume of information. This is because the optical disc hardly necessitates the power for storing information, and because the technological developments (the representative of which is BD (Blu-ray Disc)) for implementing even larger capacity are being made energetically.

"Also, inventions have been made in order to solve problems of an optical-disc library device where plural these optical discs are used, and of an archive device whose main object is to backup electronic data.

"For example, JP-A-6-274995 describes as follows (Summary of the Invention):

"'Individual pieces of information about the defect management areas of individual optical discs 1 of plural optical disc cartridges 12B to 12G stored in a storage section 13 of the optical-disc library device are collected, and the individual pieces of information collected in this way are written in advance into the optical disc 1 of an optical disc cartridge 12A. Then, if a command of seeking an optical disc cartridge out of the optical disc cartridges 12B to 12G is issued, the information about the defect management area of the optical disc of the sought optical disc cartridge is read from the optical disc of the optical disc cartridge 12A. This reading operation makes it unnecessary to read the information about the defect management area of the sought optical disc at the time of initializing the optical disc. This makes it possible to shortening the initializing time.'"

In addition to obtaining background information on this patent, VerticalNews editors also obtained the inventors' summary information for this patent: "In JP-A-6-274995, however, the optical disc, into which the information about the defect management areas are written, needs to be loaded and accessed every time the seeking command is issued. This means that an extra time becomes needed. Furthermore, in JP-A-6-274995, the problem of shortening the time is solved by adding the optical-disc drive device. The resultant presence of the plurality of optical-disc drive devices, however, gives rise to the occurrence of a problem that the control over the drive devices becomes complicated and troublesome.

"The present invention has been devised in view of the problems as described above. Accordingly, an object of the present invention is to provide an optical disc device and its recording/reproducing method for allowing the management information about plural optical discs to be managed efficiently.

"In order to solve the above problems, in the present invention, the management information about plural optical discs is stored in a memory, for example.

"According to the present invention, it becomes possible to manage the management information about plural optical discs efficiently.

"Other objects, features and advantages of the invention will become apparent from the following description of the embodiments of the invention taken in conjunction with the accompanying drawings."

For more information, see this patent: Mutsuro, Yasuo; Nagai, Yutaka; Nishimura, Koichiro; Ikeda, Masakazu; Kawamae, Osamu. Optical Disc Device and Optical Disc Recording/Reproducing Method. U.S. Patent Number 8760981, filed June 2, 2011, and published online on June 24, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8760981.PN.&OS=PN/8760981RS=PN/8760981

Keywords for this news article include: Information Technology, Hitachi-LG Data Storage Inc., Information and Data Storage.

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Source: Information Technology Newsweekly


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