Method for controlling an optical drive to record data
AssigneeMedia Tek Inc.
InventorHsiang-Ji Hsieh
Life of this patent
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Abstract
A method for controlling an optical drive to record data onto a disc. The optical recorder has a pick up head for emitting laser onto the disc to record data onto the disc. The method includes adjusting a write power and a write strategy of the optical drive according to a linear velocity of the disc when passing by the pick up head.
Claims8
A method of controlling an optical drive to write data onto an optical disc, the drive comprises a pickup head for emitting a laser to write data onto the disc, the method comprising:
- measuring the frequency of a wobble signal read from the disc to obtain a linear velocity of the disc;
- determining a write-in power emitted from the pickup head based on the linear velocity of the disc when the disc is passing through the pickup head under constant angular velocity;
- adjusting the write-in power to get an optimal write-in power data;
- storing the linear velocity and the corresponding optimal write-in power data of the optical disc in a table, wherein the table is utilized for storing at least a group of write-in power data each corresponding to a linear velocity;
- checking the optical drive to see whether the spaces of the table are enough or not to store an additional group of a linear velocity against a write-in power;
- if the memory space is enough, proceeding to get the additional group of a linear velocity against the corresponding write-in power data;
- and
- if the memory space is not enough, not proceeding to get the additional group of a linear velocity against the corresponding write-in power data.
A method of controlling an optical drive to write data onto an optical disc, the optical drive comprises a pickup head for providing energy onto the disc;
- while the received energy of the disc is over a threshold, a mark for recording data is formed on the disc;
- during forming a mark on a data-location on the disc, the optical drive determines when to start to provide energy based on the write-in strategy before the data-location passes through the pickup head;
- the method comprising:
- measuring the frequency of a wobble signal read from the disc to obtain a linear velocity of the disc;
- determining the write-in strategy based on the linear velocity of the disc when the disc is passing through the pickup head under constant angular velocity;
- adjusting the write-in strategy to get an optimal write-in strategy data;
- storing the linear velocity and the corresponding optimal write-in strategy data for the optical disc in a table, wherein the table is utilized for storing at least a group of write-in strategy data each corresponding to a linear velocity;
- checking whether the spaces of the table are enough to store an additional group of a linear velocity against a write-in strategy or not;
- if the memory space is enough, proceeding to get the additional group of the linear velocity against the corresponding write-in strategy data;
- and
- if the memory space is not enough, not proceeding to get the additional group of a linear velocity against the corresponding write-in power data.
Dependencies are inferred from the claim text.