Victor Company of Japan, Limited

Jvc Kenwood Corporation

Jvc Victor Company of Japan, Ltd.

Masaki Mochizuki

Atsushi Hayami

Jiro Uzaki

Hideaki Onoda

A chat terminal device includes a communication unit, a storage unit, and a control unit. The communication unit acquires match situation data representing the situation of a match and chat data representing a chat content corresponding to the match from a server to which the match situation data and the chat data are uploaded, the storage unit stores the match situation data and the chat data which are acquired by the communication unit, in association with upload time at which the data are uploaded to the server, and the control unit causes different areas of a display unit to display the match situation data and the chat data which are stored in the storage unit.

Chat terminal device, chat system, chat display method, and chat display program

Plural program information and a BCA (Burst Cutting Area) number of the optical discis previously recorded in the optical disc. A drive ID is stored in the nonvolatile memoryof the reproduction apparatus. A user of the reproduction apparatusnotifies the BCA number, the drive ID, and a number of preferred program information to the software house (software supplier)on the condition that the user pays for the reproduction of the preferred program information recorded in the optical disc. The software housenotifies a cipher key to the reproduction apparatusor the user. A title key is calculated in the reproduction apparatusin accordance with the BCA number, the drive ID, and the cipher key. The preferred information recorded in the optical discis permitted to be reproduced by using the title key.

Method apparatus and systems for producing and writing cipher keys, reproducing information with a cipher key, and for permitting reproduction of information with a cipher key, and permitting reproduction of information with a cipher key, and optical disc recorded with a cipher key

An optical disc has an information recording portion. The information recording portion has a spiral of a groove, and land portions located between portions of the groove which neighbor each other as viewed in a disc radial direction. Auxiliary information used when an information signal is recorded on and reproduced from the groove is previously recorded on the land portions. The auxiliary information is represented by pre-pits provided in the land portions. The information recording portion is divided into a plurality of zones as viewed in the disc radial direction. In each of the zones, at least one of two sides of the groove wobbles at a fixed frequency in accordance with a constant angular velocity system. In each of the zones, phases of wobbles of respective neighboring portions of the groove are equal to each other.

Optical disc, information recording apparatus and information reproducing apparatus therefor

A user loads a disc and an IC card into a reproduction apparatus . A reproduction managing information and a reproduction permitting information are read out from the disc and the IC card respectively. In the reproduction apparatus , the read out respective reproduction managing information and reproduction permitting information are checked and judged whether a reproduction is permitted or not. In case that the reproduction is permitted, a software information in the disc is reproduced and a utilization information in the IC card is detected at a same time. The utilization information is recorded on the IC card when the reproduction is completed. In a rental shop , the utilization information is read out from the IC card when the disc is returned to the rental shop and an amount of rental fee to be charged to a user is calculated in response to the utilization information . The user just pays the rental fee in response to the utilization of the software information.

Managing system for reproducing information composed of information recording medium, managing medium, and reproduction method and apparatus method therefor

Plural program information and a BCA (Burst Cutting Area) number of the optical disc (100) is previously recorded in the optical disc (100). A drive ID is stored in the nonvolatile memory (104a) of the reproduction apparatus (104). A user of the reproduction appparatus (104) notifies the BCA number, the drive ID, and a number of preferred program information to the software house (software supplier(110) on the condition that the user pays for the reproduction of the preferred program information recorded in the optical disc (100). The software house (110) notifies a cipher key to the reproduction apparatus (104) or the user. A title key is calculated in the reproduction apparatus (104) in accordance with the BCA number, the drive ID, and the cipher key. The preferred information recorded in the optical disc (100) is permitted to be reproduced by using the title key.

Method and apparatus for controlling the reproduction of data stored on

A double-layer optical disk comprises first and second substrates which include information pits and are bonded at their confronting faces. Each substrate has at least one information pit formed on a surface thereof for recording the information, and receives reproduction light irradiated from a predetermined reading direction. And, the information pit formed on the first substrate is different in size from the information pit formed on the second substrate.

Double-layer optical disk, recording method and manufacturing method of

According to an automatic attitude correcting system of this invention, correction signals which are used to reduce control errors through a focus control, a tracking control, a tilt control, etc. are determined by measuring the amplitude of an RF reproduction signal reproduced from an optical disc at a predetermined area. For setting a correction signal value to be supplied to an attitude control mechanism such as an attitude control mechanism, a scanning signal whose signal level varies with time variation is supplied to a control mechanism driving circuit. The scanning signal varies in level at every one-revolution of the optical disc, and the amplitude of the RF reproduction signal is outputted from the optical head at every one-revolution of the optical disc, and measured at a predetermined angle for each level of the scanning signal. The maximum value is detected on the basis of the plural amplitude values thus measured, and the scanning signal value providing the maximum value is determined as a correction signal to be used in a reproducing operation. Therefore, in the reproducing operation, the control error of the control mechanism is excellently suppressed with the correction signal.

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Yokohama, Japan

Masaki Mochizuki