Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Eiichi Igami

Mamoru Shoji

Kenji Koishi

Shuichi Tasaka

Isao Obata

Hiroshi Ueda

Eiji Ueda

Kenji Takauchi

Yoshimitsu Nakamura

Shunji Kagamibashi

Shoji Hasegawa

Syunji Kagamibashi

Takeo Oosaki

Takashi Imai

A disc recorder and player apparatus includes a plurality of recorder and player subsystems, a disc motor, and a controller. Each of the recorder and player subsystems includes a pickup and a traverse motor. When one of the recorder and player subsystems writes or reads data on or from a first track on the disc recording medium, the controller prohibits the other of the recorder and player subsystems from writing and reading data on and from a second track on the disc recording medium as well as moving the pickup to the second track, the second track being at a position different from a position of the first track, and the second track being to be accessed at a rotational speed different from a rotational speed for the first track.

Disc recorder and player apparatus including multiple recorder and player subsystems

A method of determining a recording power used to record information to an optical disc, includes carrying out test recording which records predetermined data to a predetermined area of the optical disc to determine the recording power, and recording predetermined data with a power equal to or more than the determined recording power to an area adjacent to the predetermined area.

Optical disc apparatus and recording power determining method thereof

An information recording and reproduction apparatus comprises a recording and reproduction section for recording to, or reproducing from, an information medium, an information signal, a recording and reproduction control section for controlling the recording and reproduction section based on a control parameter, an interface connected to an information signal source, the information signal source being adapted to provide a permission to update the control parameter, a forbidden flag section including a forbidden flag indicating the presence or absence of a permission to update the control parameter, the information signal source being operative to set the forbidden flag, and a control parameter update section for updating the control parameter. The control parameter update section is adapted to update the control parameter in accordance with a permission to perform updating from the information signal source when the forbidden flag has been set by the information signal source. The recording and reproduction control section is adapted to control the recording and reproduction section based on the control parameter updated by the control parameter update section.

Information recording and reproduction apparatus, information recording and reproduction method and information signal source

An information recording/reproducing apparatus wherein the CPU stores data transferred through an interface in a temporary storage area and later records the data in a recording medium by using a recording/reproducing means. The temporary storage area is divided into first and a second regions by a temporary storage region disposition device. A discriminator determines whether the process-requested region is an information managing region or a data region from the process requests made by the host computer and the temporary storage region managing information. Based on the result of this discrimination, the temporary storage region manager allocates the first region if the data is for information managing or the second region if the data is intended for data storage.

Information apparatus with cache memory for data and data management

An information recording reproducing apparatus is operable with a large-capacity recording medium and is operatively connected to a host computer. The apparatus has a cache memory for temporarily storing therein information transmitted from the host computer, and also has a write-back function and a write-through function. When recording using a write-back function designated by a recording designation flag, the maximum number of substitutions of defective sectors is automatically set to a given value for a write-back operation, and a mode display indicates that a write-back mode has been selected. The write-back operation is inhibited by a write-back inhibit flag according to the frequency of occurrence of the substitutions or the condition of a substitute area to thereby enhance the reliability of recording information.

Data information recording/reproducing apparatus which minimizes record

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Kyoto, Japan

Eiichi Igami