Method and device for determining a set of recording pulse series parameters for optical carrier recording and optical record carrier
AssigneeKoninklijke Philips Electronics N.V.
InventorGerardus Langereis
Life of this patent
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Abstract
A method is described for determining a set of recording pulse series parameters for recording information on an optical record carrier. First a series of test patterns is written on the record carrier with a values of the parameters. On reading the test patterns, the jitter values of each read signal is determined. The optimum values of the parameters are derived from a linear dependence between the set of recording pulse series parameters and the relative jitter values. The invention relates also to a device arranged to perform the method. The invention further relates to an optical record carrier comprising the optimum recording power as determined by the method according to the invention.
Claims13
A method of determining values of a set of recording pulse series parameters for optical carrier recording, where the recording pulse series are applied to a recording surface of an optical record carrier for writing a pattern of optically readable marks on the record carrier, a mark being formed by one recording pulse series, said method comprising:
- writing a write test, each write test comprising a number N of test patterns, and each test pattern with pre-determined values of the set of the recording pulse series parameters, said values being different for each test pattern;
- and
- reading the test pattern and forming a read signal;
- and
- measuring jitter values of the read signal corresponding to each test pattern, where the values of the set of the recording pulse series parameters are optimized using a linear dependence between the values of a set of recording pulse series parameters and relative jitter values.
A device for determining values of a set of recording pulse series parameters for optical carrier recording, comprising:
- recording means for writing a pattern of optically readable marks on a record carrier by irradiating a recording surface of the record carrier with recording pulse series, a mark being formed by one recording pulse series;
- a test signal generator for generating a test signal comprising a test pattern and supplying the test signal to an input of the recording means;
- reading means for reading marks on the record carrier and supplying the read signal;
- a jitter detector for measuring jitter values of the read signal corresponding to the test pattern and supplying the jitter signal to control means;
- control means for optimizing the values of the set of the recording pulse series parameters and supplying a control signal representing the optimized set of the recording pulse series parameters;
- processing means for converting input information to be recorded into an output signal supplied to the recording means, the output signal corresponding to pulse series of radiation and representing the input information, where optimized values of the set of the recording pulse series parameters are provided by the control signal, where the control means is arranged to derive the optimized values of the set of the recording pulse series parameters using a linear dependence between the values of a set of recording pulse series parameters and relative jitter values.
An optical record carrier inscribable by a radiation beam, comprising a substrate and means on the substrate comprising control information, where the control information includes pre-determined values of coefficients of a linear dependence between values of a set of recording pulse series parameters and relative jitter values.
Dependencies are inferred from the claim text.