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Apparatus and method for reducing phase discontinuity between new data and previously written data on a read/write optical storage medium
Apparatus and method for reducing phase discontinuity between new data and previously written data on a read/write optical storage medium
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机译:用于减少读/写光学存储介质上的新数据和先前写入的数据之间的相位不连续的设备和方法
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摘要
An optical storage device includes a laser, a write clock generator and a read/write disc. The laser is modulated, and a readback signal is generated from laser light read back from the disc. The readback signal includes a first frequency component caused by the modulation of the laser and a second frequency component caused by information (e.g., data or a high frequency wobble) on the medium. Phase of the write clock is adjusted in accordance with a phase difference between the first and second frequency components. This adjustment allows new data to be written to the read/write disc without a phase discontinuity between the new data and data previously written to the disc.
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