摘要:
An optical disk reproducing apparatus for reproducing information from an optical disk on which a first signal is recorded by pit pattern with a first recording clock and a second signal is recorded with overlapping state on said first signal with a second recording clock having a frequency of more than 14 times of the first clock, comprises high frequency suppressing means for suppressing a signal having a frequency which is higher than a predetermined frequency, said high frequency suppressing means being provided with a reproduced information and being adapted to suppress said first signal to extract the second signal at its output.
摘要:
An optical disk comprises a stripe-like mark array of sub-information in a region where main information is not recorded. The sub-information is divided in a plurality of frames each having a predetermined number of information words. m pieces of information symbols comprising at least one word of each frame are added n pieces of dummy symbols to generate amplers n pieces of information symbols. i pieces of parity symbols are generated so as to generate a code for error correction, and said m pieces of information symbols and said parity symbols are recorded with using said mark array.
摘要:
An optical data disk on which data is recorded comprises an identifier in a prescribed region for indicating whether a barcode-like mark is present on said disk or not, said identifier and said barcode-like mark being in different locations on said disk. The disk comprises another marking marked by a laser beam on an information layer on said disk, and information based on the position of said additional marking is encrypted or is applied with a digital signature, and said encrypted information or digital signature, respectively, is included in said barcode-like mark. Further, a reproduction apparatus for use with such kind of disk is provided.
摘要:
An optical data disk on which data is recorded and which comprises an identifier for indicating whether a barcode-like mark is present or not on said disk is constructed from two disk substrates. The first substrate may have a semi-transparent reflection layer and the second substrate may have an almost non-transparent reflection layer, and data from both recording substrates are reproduced from one side of said disk. Further, a reproduction apparatus for such type of optical disk is provided.
摘要:
An optical disk on which data is recorded comprises a prescribed region in which an identifier is provided for indicating whether a barcode-like mark is present or not on said optical disk, said identifier and said mark being in respectively different locations on said disk, the mark being disposed in a circumferential direction and having a plurality of bars each extending in a radial direction. Control data in which physical feature information regarding the disk is recorded in said prescribed region.
摘要:
The operating and other procedures of an optical disk application system of the type for which a network is used are simplified. Optical disks have auxiliary data recording areas, where different IDs for individual disks, and/or cipher keys and/or decoding keys for ciphers are recorded in advance in a factory. By using the IDs to release the soft ciphers, using the cipher keys when sending the ciphers, and using the decoding keys when receiving the ciphers, user authorization procedures are simplified.
摘要:
An optical disk comprises a first recording area for recording contents data and data for recording and reproducing the contents data, and a second recording area for recording secondary data on the contents recorded in the first recording area, the secondary data being recorded as stripe marks longer in radial direction. Further, the second recording area comprises a first section for recording control data on the second recording area, a second section for recording data not to be inhibited to be outputted from a recording and reproducing apparatus for the optical disk, and a third section for recording data to be inhibited to be outputted from a recording and reproducing apparatus. The control data recorded in the first section includes an identifier which shows whether said second recording area includes said third section or not. By using the data to be inhibited to be outputted in the second recording area, a copyright of contents is protected and illegal use of software is prevented.
摘要:
A system for allowing software publishers to control which video standard(s) can be recovered from an optical disk (23) containing video source material. The disk may be digitally encoded so that any of NTSC, PAL and other video signal standards can be generated upon proper decoding. But the disk also includes a code which can lock out one or more standards. Players (21) for such disks may be capable of generating video signals according to all popular standards, in which case the user selects a desired standard. However, the player will generate a video signal of the selected standard only if there is an appropriate authorization code on the disk. The system allows manufacture of "universal" players without necessarily impacting the contractual and marketing plans of motion picture companies, for example, which release films in different territories at different times. The control technique can be extended to lock out specific territories. Each player has a built-in territory code. The player will play a disk only if the disk contains an authorization code for the player's specific territory.
摘要:
A method for operating a video processing system by receiving initial copyright information from a first source, storing the initial copyright information, receiving updated copyright information from a second source, and updating the stored copyright information in response to the updated copyright information. For example in one embodiment of the present invention, the initial copyright information for a program is received from an electronic program guide and updated copyright information is received along with the selected program. The video processing system may be programmed to operate in a first operating mode in response to the initial copyright information and the operating mode of the video processing system may be switched to a second operating mode in response to the updated copyright information.
摘要:
A system and method for interfacing between a plurality of electronic devices provides for communicating information between the devices. Information regarding scheduled events in one device can be obtained and processed by other devices. The user interface of any device can be used for controlling any other device, including scheduling events in any other device. For example, on-screen display capability of any device can be used for displaying information regarding any other device or devices. Password information entered or resident in one device may be used to enable an operation in another device without compromising the security of the password. Also, any device can maintain a log of exception conditions for one or more devices and provide the log to a user. A device can modify control information to attempt to achieve an object of the control information despite the existence of an exception condition. For example, if one device is a digital VHS VCR and control information requests recording of a digital signal but an analog tape is loaded in the VCR, the system can record an analog signal instead, thereby achieving the goal of recording a particular program. A system comprising consumer electronics devices can include a switching arrangement comprising switches in various ones of the devices that is automatically configured to route an RF signal to the appropriate destination device.