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Optical disc with data recorded at different rates on different zones and recording apparatus, and reproducing apparatus therefor
| Details |
Inventors: Naito, Ryuichi;
Assignee: Pioneer Electronic Corporation (Tokyo, JP)
Primary Examiner: Psitos; Aristotelis
Assistant Examiner: Tran; Thang V.
Attorney, Agent or Firm: Kane, Dalsimer, Sullivan, Kurucz, Levy, Eisele and Richard
An optical disc recording apparatus for dividing an information record surface of an optical disc into a plurality of record zones and recording information at a data rate which differs for every record zone, is provided with: a drive device for rotationally driving the optical disc by a constant angular velocity; a frequency conversion device for converting a clock frequency of input clock data corresponding to record data inputted from the external which is to be recorded on the optical disc, to record clock data corresponding to the record zone to be recorded, and outputting the record clock data; a memory device for storing the record data by a timing corresponding to the input clock data, and outputting the record data on the basis of the record clock data; and a record device for recording the record data outputted from the memory device, to the optical disc. |
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DETAILED DESCRIPTION It is therefore an object of the present invention to provide an optical disc recording apparatus, an optical disc reproducing apparatus, an optical disc recording and reproducing apparatus and an optical disc, which can improve the access speed, and can make the information recording density high, in record and reproduction of the information which requires a fixed input-and-output data rate.
According to the present invention, the above mentioned object can be achieved by an optical disc recording apparatus for dividing an information record surface of an optical disc into a plurality of record zones and recording information at a data rate which differs for every record zone.
The optical disc recording apparatus is provided with: a drive device for rotationally driving the optical disc by a constant angular velocity; a frequency conversion device for converting a clock frequency of input clock data corresponding to record data inputted from the external which is to be recorded on the optical disc, to record clock data corresponding to the record zone to be recorded, and outputting the record clock data; a memory device for storing the record data by a timing corresponding to the input clock data, and outputting the record data on the basis of the record clock data; and a record device for recording the record data outputted from the memory device, to the optical disc.
According to the present invention, the above mentioned object can be also achieved by an optical disc reproducing apparatus for reproducing an optical disc, which information record surface is divided into a plurality of record zones and to which information is recorded at a data rate which differs for every record zone.
The optical disc reproducing apparatus is provided with: a drive device for rotationally driving the optical disc by a constant angular velocity; an optical pickup device for reading record data on the optical disc, and outputting it as a reproduction data; a clock extraction device for extracting reproduction clock data from the reproduction data; and a memory device for storing the reproduction data by the timing corresponding to the reproduction clock data, and outputting the reproduction data on the basis of output clock data inputted from the external
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TV Signal 
