Compact disc player using Sub-Q data for track jump compensation
AssigneeSony Corporation
InventorKazutoshi Shimizume
Life of this patent
Estimating the term…
Abstract
A CD player is disclosed in which it is adapted such that a data signal of a greater amount than necessary is reproduced by rotating a compact disk at a speed higher than its normal rotating speed and the data signal is stored into a large-capacity memory before the signal is deinterleaved and the data stored in the large-capacity memory is read and output even while a pickup, when a track jump has occurred, is being returned to the position preceding where the track jump occurred, whereby the continuity of the output signal from the CD player is maintained.
Claims6
An apparatus for reproducing a signal including frames of data recorded in tracks on a disc, each frame of data having sub-Q data, comprising:
- pickup means for reproducing the recorded signal to generate a reproduced signal,
- comparison means for detecting whether an incremented value of sub-Q data in a first frame of the reproduced signal is equal to a value of sub-Q data in a second frame of the reproduced signal to generate a control signal indicating that a track jump has occurred,
- means for adding a predetermined value to the sub-Q data in the first frame to generate the incremented sub-Q value,
- servo means for controlling the pickup means to search for the first frame on the disc as a function of said control signal,
- memory means for storing the reproduced signal, and
- means for writing the reproduced signal into the memory means as a function of said control signal, said means for writing exhibiting only two operative conditions, a first condition to write the reproduced signal into the memory means at only one predetermined rate and a second condition to cease writing.
An apparatus for reproducing a signal including frames of data recorded in tracks on a disc, comprising:
- pickup means for reproducing the recorded signal to generate a reproduced signal,
- comparison means for comparing a value of first data in a first frame of the reproduced signal with a value of second data in a second frame of the reproduced signal to generate a control signal indicating that a track jump has occurred,
- servo means for controlling the pickup means to search for the first frame on the disc as a function of said control signal,
- memory means for storing the reproduced signal, and
- means for writing the reproduced signal into the memory means as a function of said control signal, said means for writing exhibiting only two operative conditions, a first condition to write the reproduced signal into the memory means at only one predetermined rate and a second condition to cease writing;
- and
- means for operating said servo means to control said pickup means to perform a reverse jump of one track when said memory means is full.
Dependencies are inferred from the claim text.