# US 7,613,089 B2 · Monitor and adjust method for optical disc recording

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- Number: US 7,613,089 B2
- Document ID: US7613089B2
- Status: Granted
- Kind: B2
- Application number: 11/329,288
- Filed: 2006-01-11
- Published: 2006-07-13
- Granted: 2009-11-03
- Earliest claimed: 2005-01-11
- Assignees: VIA Technologies, Inc.
- Inventors: Keug-Len Lee; Sherlack Chu
- Web page: https://patentgrep.com/patent/US7613089B2

## CPC

- G11B 7/1267: Power calibration
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)

## Abstract

A method is disclosed for adjusting write power when recording an optical disc. First, pre-setting a range of a write quality parameter and a write power. Next, moving a spindle motor and an optical pickup head to a target track. After the spindle motor is stable at the intended rotation speed as well as the optical pickup head is positioned correctly at the target track, then reading a write quality parameter. Then, determining whether the write quality parameter is in the range. When the write quality parameter is in the range, then according to the write power to write data to the target track. When the write quality parameter is out of the range, then adjusting the write power to write data to the target track.

## Claims

### Claim 1

A method for adjusting write power of optical disc recording, comprising:
pre-setting a range of a write quality parameter and a write power;
commanding an optical pickup head and a spindle motor to move to a target track to be written;
reading said write quality parameter;
storing and accumulating said write quality parameter in a memory unit and counting a number of times of storing write quality parameters;
determining whether said number of times of storing write quality parameters is equaled to a target value;
writing a data to said target track according to said write power when said number of times of storing write quality parameters is less than said target value;
calculating an average write quality parameter and resetting said number of times of storing write quality parameters and an accumulated value of said write quality parameters when said number of times of storing write quality parameters is equaled to said target value;
determining whether said write quality parameter is in said range; and
writing a data to said target track according to said write power, which is unadjusted, when said average write quality parameter is in said range; otherwise writing said data to said target track according to said write power, which is adjusted, when said average write quality parameter is out of said range.

### Claim 2 (depends on 1)

A method of claim 1, further comprising:
increasing said write power when said average write quality parameter is lower than said range; and
decreasing said write power when said average write quality parameter is higher than said range.

### Claim 3 (depends on 1)

A method of claim 1, wherein said average write quality parameter is calculated as a quotient of said accumulated value of said write quality parameters dividing by said target value.

### Claim 4 (depends on 1)

A method of claim 1, wherein said write quality parameter comprising:
Beta value;
a Gamma value;
a jitter value; and
any other parameters relating to write quality.

### Claim 5 (depends on 1)

A method of claim 1, wherein said memory unit comprising one of the following:
a register; and
a buffer.

### Claim 6 (depends on 1)

A method of claim 1, wherein said number of times of storing write quality parameters is stored in said memory unit.