Recording disk and recorded information reproducing apparatus
AssigneesPioneer Video Corporation, Pioneer Electronic Corporation
InventorsMinemasa Ohta, Naoto Itoh
Life of this patent
Estimating the term…
Abstract
A recording disk carrying a compressed video signal at a high recording density and a recorded information reproducing apparatus for reproducing the information recorded on the particular recording disk. A linear velocity of the reading of information is adjusted according to a data quantity signal reproduced from the recording disk having data areas in which a compressed video signal produced by the compression and coding process is recorded in predetermined unit blocks (GOP block) and at least a data quantity information recording area in which a data quantity signal representing the quantity of each unit of the compressed video signal is recorded.
Claims3
A recorded information reproducing apparatus for reproducing information from a recording disk which comprises data areas in which a compressed video signal generated by compressing and coding a video signal is recorded in predetermined unit blocks, and at least a data quantity information recording areas in which a data quantity signal representing a data quantity of the compressed video signal in each unit block is recorded, said apparatus comprising:
- rotation driving means for performing a rotation driving of the disk;
- a pick-up for reading-out recorded information from the recording disk and producing a read-out signal;
- signal reproducing means for reproducing the compressed video signal and the data quantity signal based on said read-out signal and respectively producing a reproduced compressed video signal and a reproduced data quantity signal;
- and
- a controller for controlling said rotation driving means to drive said disk in a manner that a read-out linear velocity by said pick-up equals a linear velocity corresponding to the reproduced data quantity signal.
A recorded information reproducing apparatus for reproducing information from a recording disk which comprises data areas in which a compressed video signal generated by compressing and coding a video signal is recorded in predetermined unit blocks, said apparatus comprising:
- rotation driving means for performing a rotation driving of the disk;
- a pick-up for reading-out recorded information from the recording disk and producing a read-out signal;
- signal reproducing means for reproducing the compressed video signal based on said read-out signal and respectively producing a reproduced compressed video signal;
- compressed signal expanding means for expanding said reproduced compressed video signal and producing said video signal;
- data quantity measuring means for counting up the number of data bits of said reproduced compressed Video signal for each of said predetermined unit blocks and producing a count value as a data quantity signal;
- and
- a controller for controlling said rotation driving means to drive said disk in a manner that a read-out linear velocity by said pick-up equals a linear velocity corresponding to said data quantity signal.
Dependencies are inferred from the claim text.