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    • 21. 发明专利
    • Optical record carrier, scanning method thereof and device for making the method
    • CZ289539B6
    • 2002-02-13
    • CZ117496
    • 1995-08-16
    • KONINKL PHILIPS ELECTRONICS NV
    • HOLTSLAG ANTONIUS H MCOOPS PETERHEEMSKERK JACOBUS P JVISSER DERK
    • G11B7/00G11B7/005G11B7/085G11B7/09G11B7/13G11B7/135G11B7/24
    • The invented optical record carrier has a plurality of information layers (3, 4, 5) stored in different depth of the record carrier, whereby the information layers (3, 4, and 5) are separated by spacer layers (6, 7). Thickness of the stack (2) of layers (2), defined as a distance between upper surface of the uppermost information layer (5) and bottom surface of the lowermost information layer (3), is less than a value 2d being defined by the equation: 2d = 34 ne3 {lambda}.SQRT.r/(ne2-1)(NA)e4 wherein n is a refractive index of the spacer layers, {lambda} is the vacuum wavelength of the radiation beam intended for scanning the information layer during record or writing, NA is a numerical aperture of focusing means of the radiation beam at a scanning spot, by means of which the information layer is to be scanned during record or writing, and r is the maximally admissible decrease of the Strehl intensity of the radiation beam at the scanning spot on the record carrier due to spherical aberration that is at the most equal to 0.05. Scanning method of the invented optical record carrier is characterized in that the optical record carrier is scanned during record or writing the information by a radiation beam, in which a constant spherical aberration has been introduced by a focusing means, whereby this constant spherical aberration is assigned to a stack of layers (3, 6, 4, 7, 5) on the record carrier that compensates the spherical aberration generated in the radiation beam when focused at approximately half of the information layer stack thickness. In the present invention there is also suggested a device for making the invented scanning method.
    • 25. 发明专利
    • BR0108522A
    • 2003-04-15
    • BR0108522
    • 2001-12-06
    • KONINKL PHILIPS ELECTRONICS NV
    • TREFFERS MENNO AHEEMSKERK JACOBUS P J
    • G06F13/00G06F17/30G11B20/10G11B20/12G11B27/00H04N5/85H04N5/93
    • The invention relates to an apparatus for reading data from a data carrier and for processing said read data, to an apparatus for storing address data and to a data carrier for storing data. When playing back a CD, additional services may be available on the Internet. To access these services, the address of the publisher's web-site has to be known to the playback apparatus. Therefore, according to the invention it is proposed that an apparatus for reading data from a data carrier comprises: reading means for reading data to be reproduced and a data identifier identifying said data from said data carrier, transmitting means for transmitting said data identifier to a central database requesting further information related to said read data, receiving means for receiving a response message from said central database, which message comprises an address of an information database storing said further information and/or said further information requested by said central database from said information database while using said data identifier, and processing means for processing said further information received from said information database via said central database or requested from said information database while using said address received from said central database. The address of the publisher's web-site can then be readily accessed and updated. Moreover, the storage format need not be changed to enable storage of the address of the central database on the data carrier. Finally, the use of this method is backwards compatible, that is, it is also effective for already sold data carriers.
    • 27. 发明专利
    • Apparatus and method for reading data from a data carrier and data carrier for use in the apparatus and method
    • AU2097102A
    • 2002-07-01
    • AU2097102
    • 2001-12-06
    • KONINKL PHILIPS ELECTRONICS NV
    • TREFFERS MENNO AHEEMSKERK JACOBUS P J
    • G06F13/00G06F17/30G11B20/10G11B20/12G11B27/00H04N5/85H04N5/93
    • The invention relates to an apparatus for reading data from a data carrier and for processing said read data, to an apparatus for storing address data and to a data carrier for storing data. When playing back a CD, additional services may be available on the Internet. To access these services, the address of the publisher's web-site has to be known to the playback apparatus. Therefore, according to the invention it is proposed that an apparatus for reading data from a data carrier comprises: reading means for reading data to be reproduced and a data identifier identifying said data from said data carrier, transmitting means for transmitting said data identifier to a central database requesting further information related to said read data, receiving means for receiving a response message from said central database, which message comprises an address of an information database storing said further information and/or said further information requested by said central database from said information database while using said data identifier, and processing means for processing said further information received from said information database via said central database or requested from said information database while using said address received from said central database. The address of the publisher's web-site can then be readily accessed and updated. Moreover, the storage format need not be changed to enable storage of the address of the central database on the data carrier. Finally, the use of this method is backwards compatible, that is, it is also effective for already sold data carriers.