Pioneer Electronic Corporation

Osamu Hira

Naoki Masaki

Naoki Shimada

The reproduction finish of an optical disc reproducing apparatus is controlled. The optical disc has a program area, in which information is recorded one after another in a radial direction from an inner circumference toward an outer circumference. The information includes recording position information arranged at a predetermined interval in the radial direction. The controlling method includes the steps of: reading the recording position information one after another; continually comparing a presently read recording position information with a previously read recording position information; moving a reading position toward the outer circumference; distinguishing whether reading of the information at the reading position after moving is normal or not; and moving the reading position toward the inner circumference, and finishing the information reproduction.

Method of controlling reproduction finish of optical disc reproducing

An information reproducing apparatus, to which a recording medium having record information and table of contents information is mounted, controls a reproduction operation on the basis of the table of contents information. The apparatus includes: an operation input device by which various command data are inputted; a first memory for temporarily storing reproduction control information including the table of contents information; a reproduction device for reproducing the recording medium according to the inputted command data; a second memory of non-volatile type for storing the reproduction control information in correspondence with each recording medium; and a memory control device for storing into the second memory the reproduction control information stored in the first memory the at least one of the inputted command data and an operation condition of the reproduction device indicate a continuous stop condition of the reproduction operation. The reproduction device reproduces the recording medium on the basis of the reproduction control information stored in the first and second memory according to circumstances.

Information reproducing apparatus

An optical disc reproducing apparatus reproduces an optical disc having an information recording surface on which record information and control information are recorded. The apparatus is provided with: a device for rotationally driving the optical disc; a reading device for forming a light spot on the information recording surface, and receiving a reflected light to generate a read signal of the reflected light; a device for reproducing the record information and the control information from the read signal; a device for detecting whether a focus of the light spot is normal or not according to the read signal; a device for detecting whether a rotation number of the optical disc is normal or not according to the read signal; and a device for discriminating the optical disc on the basis of conditions of the detected focus and the detected rotation number.

Optical disk reproducing apparatus for identifying whether the disk is a

A compact disk player has a magazine containing a plurality of disks. Identification data, about a last disk which has been played before the stop of the playing of the disk, is detected. A memory is provided for storing the detected identification data. The last disk, data of which is stored in the memory, is played at the next time by operating a stop key.

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Tokorozawa, Japan

Osamu Hira