Optical recording/reproduction apparatus
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorYuuichi Kamioka
Life of this patent
Estimating the term…
Abstract
In an optical recording/reproduction apparatus having M optical heads which records and reproduces video and audio data transferred in a high speed using a head to be used as a reference and keeping the rotation of a disk in synchronism with inputted or outputted television video or audio signals, respective heads have their data delay memories corresponding to respective disk rotation waiting delay time for their respective installation position difference from the reference head. By giving recording-permission signals at record-starting addresses for respective heads for the input data and by giving the reproduction-permission signal for respective heads for the output data, simultaneous recording and simultaneous reproduction on different tracks of a disk can be realized.
Claims7
An optical recording apparatus comprising:
- an optical disk which is divided into sector regions in a manner that one sector corresponds to one field of television video signal and revolves at a constant angular velocity, and
- N sets (N is a natural integer) of optical head group each having M optical heads (M is a natural integer which is not simultaneously 1 with N) for recording inputted series of video and/or audio data by dividing them by M on tracks on the optical disk,
- M.times.N optical heads being arranged in a manner that they are disposed on said optical disk with a given order and given spacings and that one out of said M.times.N optical heads being taken as a reference head,
- rotation synchronization means for controlling the rotation of the disk by synchronizing a sector address signal disposed at the top of said sector region reproduced by said reference head with respect to a field timing of the input television video-audio signal,
- delay memories for delaying the video-audio data which were inputted in synchronism with said field timing until a timing when said heads come to those respective sector regions on which the recording is started, and
- timing generation means for generating a recording-permission signals for respective heads at timings at which respective heads reproduce said sector address signal of said sector regions from which those respective heads start to record,
- whereby a series of video and/or audio data are recorded as many as N sets by dividing those data into M tracks regardless of the installation position of respective heads.
An optical reproduction apparatus comprising
- an optical disk which is divided into sector regions in a manner that one sector corresponds to one field of television video signal and revolves at a constant angular velocity and onto which a series of video and/or audio data are being recorded by dividing them into M (M:natural integer) tracks, and
- N sets (N is a natural integer, which is not simultaneously 1 with N) of optical head groups comprising M optical heads for reproducing said divided data,
- M.times.N optical heads being arranged in a manner that they are disposed on said optical disk with a given order and given spacings, and that one out of said M.times.N optical heads being taken as a reference head
- a rotation synchronization means for controlling the rotation of the disk by synchronizing a sector address signal disposed at the top of said sector region reproduced by said reference head with respect to a field timing of the reproduced television video-audio signal,
- delay memories, for each of said respective heads, to make the output of those data which were read out at different timings due to the different installation positions of respective heads in synchronism with the reference head, and
- timing generation means for generating the reproduction-permission signals for respective heads at timings at which respective heads reproduce said sector address signal of sector regions in which the data to be reproduced by respective heads, whereby N sets of series of video and/or audio data are outputted from said head groups of M heads having different installation positions in synchronism with respect to the reference head.
Dependencies are inferred from the claim text.