The patent's assignee for patent number 8792321 is
News editors obtained the following quote from the background information supplied by the inventors: "Pre-recorded optical media (e.g., optical discs) can be mass-replicated inexpensively and constitute an ideal distribution medium for many types of data, including, for example, compact disc (CD)-Audio, digital versatile disc (DVD)-Video, CD read-only memory (CD-ROM), Blu-ray discs (BD). Many optical disc applications can be enhanced or made more secure if the pre-recorded discs are made unique or serialized such that a typical readout device can identify the unique information. This is currently only possible with recordable media that has an added expense associated with recording, or on pre-recorded media via Burst Cutting Area (BCA) code writing for DVD, BD, and so on, where BCA has limited data capacity and limited application compatibility.
"A proposed alternative for improving disc security involves the use of radio-frequency identification (RFID) technology, in which an optical media with pre-recorded content is provided with an electro-optic layer, which allows the media to be disabled at a manufacturing facility, and subsequently enabled at a point of sale using RF activation. There is, however, still a need for additional techniques for disc activation in a manufacturing, a distribution or a retail setting."
As a supplement to the background information on this patent, VerticalNews correspondents also obtained the inventors' summary information for this patent: "Embodiments of the present principles provide an optical disc having pre-recorded and recordable regions, various groove structures or configurations, as well as method of forming the disc, a stamper for forming a disc master, and a recording device for writing data to the recordable region.
"One embodiment provides an optical disc, which includes a first region with pre-recorded data including program content, and at least one recordable region. The program content is unreadable until additional data is written to the recordable region.
"Another embodiment provides an optical disc, which includes a recordable region having at least one groove with a plurality of gaps, in which the at least one groove is configured for use in recording data.
"Another embodiment provides an optical disc, which includes a recordable region having at least one grooveless region, in which the at least one grooveless region is configured for recording data.
"Another embodiment provides an optical disc, which includes a first region with pre-recorded data formed on a substrate, a second region including one or more recordable areas having at least one groove;, and a recording layer formed only in the second region.
"Another embodiment provides a method of fabricating an optical disc, which includes: (a) forming a first region with pre-recorded data on a substrate, (b) forming a second region with at least one groove on the substrate, and © forming a recording layer only in the second region.
"Another embodiment provides a stamper for use in fabricating optical discs, which includes features for forming at least one groove and a plurality of pits on the disc, in which the features include at least one of: forming a groove having a plurality of gaps, and forming a blank section with a length greater than about 10 .mu.m and less than about 100 .mu.m between two pits.
"Another embodiment provides a recording device, which includes a processor configured for executing a program having instructions for performing a method, the method including retrieving information for identifying at least one recordable region of a disc by one of: accessing pre-recorded data on the disc, and accessing a database external to the disc; and directing a laser to write additional data to the at least one recordable region."
For additional information on this patent, see: Town,
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