Back to results
US 2003/0169655 A1Published application
Disk recording device
AssigneeSanyo Electric Co., Ltd.
InventorAkira Tsukihashi
Life of this patent
Estimating the term…
Abstract
For an overwriting operation, recorded data is read from a disk, and a bit clock is reproduced from the read, recorded data in a clock reproduction circuit (7). Data processing in an encoder (14) is performed in synchronism with the reproduced bit clock. With the above, recording data is output from the encoder (14) in synchronism with the recorded data in the disk whereby recording data to write onto the disk for overwriting is synchronized with the recorded data. A defined recording region is thus precisely overwritten.
Claims8
A disk recording device capable of data writing onto a disk for overwriting, comprising:
- a clock reproduction circuit for reproducing a bit clock from recorded data read from the disk;
- an encoder for data processing to modulate input data into recording data suitable for recording onto the disk;
- and
- an optical head for reading recorded data from the disk, and for writing the recording data supplied from the encoder;
- wherein, for an overwriting operation,
- the optical head reads the recorded data from the disk,
- the clock reproduction circuits reproduces a bit clock from the recorded data read by the optical head,
- the encoder performs data processing in synchronism with the bit clock reproduced by the clock reproduction circuit to thereby prepare recording data which is in synchronism with the recorded data, and
- the optical head writes the recording data onto the disk based on an output from the encoder.
6 more elements
Dependencies are inferred from the claim text.