Information reproduction apparatus with control means for plural track kickback operation
AssigneeSharp Kabushiki Kaisha
InventorsYukihiko Haikawa, Shigeki Tsuji
Life of this patent
Estimating the term…
Abstract
Upon initiation of reproduction of data from a disc, the operation of writing into a buffer memory data reproduced from the disc and the operation of reading out data from the buffer memory are carried out in parallel because the buffer memory is first empty. When the data amount in the buffer memory becomes full, a pickup is kicked back from the last reproduction sector by n tracks corresponding to the data amount of L sectors and the data writing operation into the buffer memory is suspended. When the reproduction sector reaches a target sector, data writing is reinitiated, and data of L sectors is written continuously until the buffer memory becomes full.
Claims14
An information reproduction apparatus for reproducing information recorded on a recording track of a recording medium, comprising:
- reproduction means for reproducing at a first transfer rate information recorded on said recording medium by tracing said recording medium,
- memory means for storing information reproduced by said reproduction means,
- readout means for reading out stored information from said memory means at a second transfer rate lower than said first transfer rate, and
- control means for controlling said reproduction means and said memory means such that
- when the amount of information stored in said memory means exceeds a predetermined value, storage of information from said reproduction means into said memory means is suspended and the reproduction position of said reproduction means is moved back by a plurality of tracks at once with the number of tracks corresponding to an information amount to trace said recording track, and
- when said reproduction means arrives at a position where information subsequent to the last information stored in said memory means is recorded, storage of information from said reproduction means to said storage means is reinitiated.
An information reproduction apparatus for reproducing information recorded on a recording track of a recording medium, comprising:
- reproduction means for reproducing at a first transfer rate information recorded on said recording medium,
- memory means for storing information reproduced by said reproduction means,
- readout means for reading out stored information from said memory means at a second transfer rate lower than said first transfer rate,
- first control means for controlling said memory means, so that said memory means carries out only readout of information when the information amount stored in said storage means exceeds a predetermined value, and, so that said memory means carries out storage and readout of information when the predetermined amount of information is readout from said memory means,
- estimation means for estimating a readout time period for said predetermined information amount to be read out, and
- second control means for controlling said reproduction means so as to carry out only one kick back within said readout time.
An information reproduction apparatus for reproducing information recorded in sector units on a recording track of a recording medium, comprising:
- reproduction means for reproducing at a first transfer rate information stored in said recording medium by tracing said recording medium,
- memory means for storing information reproduced by said reproduction means,
- readout means for reading out stored information from said memory means at a second transfer rate lower than said first transfer rate,
- control means for controlling said reproduction means and said memory means so that
- storage of information into said memory means is carried out in parallel with reading out information from said memory means, and when the information amount stored in said memory means exceeds a predetermined value, the reproduction position of said reproduction means is moved back by a plurality of tracks, at one time and storage of information into said memory means is suspended, and
- when the reproduction position of said reproduction means reaches the position where the information subsequent to the last information stored in said memory means is recorded, storage of information into said memory means is reinitiated to store information of a plurality of sectors into said memory means continuously.
Dependencies are inferred from the claim text.