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US 6,556,524 B1Granted
Optimum-recording-speed determining method, recording-speed setting method and recording method for optical disk
AssigneeYamaha Corporation
InventorKenichiro Takeshita
Life of this patent
Estimating the term…
Abstract
Optimum power control also known as OPC is performed while changing a recording speed and a recording laser power level. Signal recorded through the optimum power control is reproduced for measurement of reproduced signal quality. Recording speed achieving a recording laser power level that can provide reproduced signal quality falling within a predetermined acceptable range is displayed as a recommendable recording speed so that a user can set the displayed speed as a recording speed for use in actual recording.
Claims32
A method of determining an optimum recording speed of an optical disk, said method comprising the steps of:
- performing test recording on the optical disk at a given recording speed while changing a recording laser power level, and reproducing results of the test recording from the optical disk;
- measuring parameter values pertaining to reproduced signal quality on the basis of the reproduced results;
- and
- determining, on the basis of the parameter values, whether there is achieved any laser power level that can provide reproduced signal quality falling within a predetermined acceptable range,
- wherein when it is determined that there is achieved the laser power level that can provide reproduced signal quality falling within the predetermined acceptable range, said given recording speed is judged as a proper recording speed, while when it is determined that there is achieved no laser power level that can provide reproduced signal quality falling within the predetermined acceptable range, said given recording speed is judged as an improper recording speed.
2 more elements
A method of determining an optimum recording speed of an optical disk, said method comprising the steps of:
- performing test recording on the optical disk while changing a recording speed and a recording laser power level, and reproducing results of the test recording from the optical disk;
- measuring parameter values pertaining to reproduced signal quality on the basis of the reproduced results;
- and
- determining, on the basis of the parameter values, whether there is achieved any laser power level that can provide reproduced signal quality falling within a predetermined acceptable range,
- wherein a recording speed achieving the laser power level that can provide reproduced signal quality falling within the predetermined acceptable range is judged as a proper recording speed, while another recording speed achieving no laser power level that can provide reproduced signal quality falling within the predetermined acceptable range is judged as an improper recording speed.
2 more elements
A method of setting a recording speed of an optical disk, said method comprising:
- a step of performing test recording on the optical disk with a recording speed initially set to a maximum available speed while changing a recording laser power level, and reproducing results of the test recording from the optical disk;
- a step of measuring parameter values pertaining to reproduced signal quality on the basis of the reproduced results;
- a step of, when there is achieved a recording laser power level that can provide reproduced signal quality higher than a predetermined value, terminating the test recording at the recording speed, but when there is achieved no recording laser power level that can provide reproduced signal quality higher than the predetermined value, performing the test recording while sequentially lowering the recording speed and terminating the test recording at a recording speed that can provide reproduced signal quality higher than the predetermined value;
- and
- a step of displaying, as a recommendable or settable recording speed, each recording speed having been used at the time of termination of the test recording in such a manner that the displayed recording speed can be set for use in actual recording.
2 more elements
A method of setting a recording speed of an optical disk, said method comprising:
- a step of performing test recording on the optical disk with a recording speed initially set to a desired speed designated by a user operation while changing a recording laser power level, and reproducing results of the test recording from the optical disk;
- a step of measuring parameter values pertaining to reproduced signal quality on the basis of the reproduced results;
- a step of, when there is achieved a recording laser power level that can provide reproduced signal quality higher than a predetermined value, terminating the test recording at the recording speed, but when there is achieved no recording laser power level that can provide reproduced signal quality higher than the predetermined value, performing the test recording while sequentially lowering the recording speed and terminating the test recording at a recording speed that can provide reproduced signal quality higher than the predetermined value;
- and
- a step of displaying, as a recommendable or settable recording speed, each recording speed having been used at the time of termination of the test recording in such a manner that the displayed recording speed can be set for use in actual recording.
2 more elements
A method of determining an optimum recording speed of an optical disk, comprising:
- performing test recording on the optical disk at a given recording speed while changing a recording laser power level, and reproducing results of the test recording from the optical disk;
- measuring a total number of detected synchronization signals within a predetermined time period as parameter values pertaining to reproduced signal quality based on the reproduced results;
- and
- determining, based on the total number of detected synchronization signals, whether there is achieved any laser power level that can provide the total number of detected synchronization signals falling within a predetermined acceptable range,
- wherein when it is determined that there is achieved the laser power level that can provide the total number of detected sychronization signals falling within the predetermined acceptable range, said given recording speed is judged as a proper recording speed, while when it is determined that there is achieved no laser power level that can provide the total number of detected synchronization signals falling within the predetermined acceptable range, said given recording speed is judged as an improper recording speed.
2 more elements
A method of determining an optimum recording speed of an optical disk comprising:
- performing test recording on the optical disk while changing a recording speed and a recording laser power level, and reproducing results of the test recording from the optical disk;
- measuring a total number of detected synchronization signals within a predetermined time period as parameter values pertaining to reproduced signal quality based on the reproduced signal results;
- and
- determining, based on the total number of detected synchronization signals, whether there is achieved any laser power level that can provide the total number of detected synchronization signals falling within a predetermined acceptable range,
- wherein a recording speed achieving the laser power level that can provide the total number of detached synchronization signals falling within the predetermined acceptable range is judged as a proper recording speed, while another recording speed achieving no laser power level that can provide the total number of detected synchronization signals falling within the predetermined acceptable range is judged as an improper recording speed.
2 more elements
A method of determining an optimum recording speed of an optical disk, comprising:
- performing test recording on the optical disk at a given recording speed while changing a recording laser power level, and reproducing results of the thest recording from the optical disk;
- measuring parameter values pertaining to reproduced signal quality based on the reproduced results;
- and
- determining, based on the parameter values, whether there is achieved any laser power level that can provide reproduced signal quality falling within a predetermined acceptable range,
- wherein when it is determined that there is achieved the laser power level that can provide reproduced signal quality falling within the predetermined acceptable range, said given recording speed is judged as an improper recording speed,
- said method further including:
- causing recording data to be transferred from a host computer to an optical disk recording apparatus so that said optical disk recording apparatus records the recording data onto the optical disk with a reproducing laser power level while changing a recording speed within a recording speed range settable in said optical disk recording apparatus,
- determining whether a buffer memory of said optical disk recording apparatus will cause buffer underrun during recording of the recording data, to thereby identify one or more recording speeds that can avoid the buffer underrun, and
- performing the test recording by use of one of the recording speeds that can avoid the buffer underrun.
6 more elements
A method of determining an optimum recording speed of an optical disk, comprising:
- performing test recording on the optical disk while changing a recording speed and a recording laser power level, and reproducing results of the test recording from the optical disk;
- measuring parameter values pertaining to reproduced signal quality based on the reproduced results;
- and
- determining, based on the parameter values, whether there is achieved any laser power level that can provide reproduced signal quality falling within a predetermined acceptable range,
- wherein a recording speed achieving the laser power level that can provide reproduced signal quality falling within the predetermined acceptable range is judged as a proper recording speed, while another recording speed achieving no laser power level that can provide reproduced signal quality falling within the predetermined acceptable range is judged as an improper recording speed,
- said method further including:
- causing recording data to be transferred from a host computer to an optical disk recording apparatus so that said optical disk recording apparatus records the recording data onto the optical disk with a reproducing laser power level while changing a recording speed within a recording speed range settable in said optical disk recording apparatus,
- determining whether a buffer memory of said optical disk recording apparatus will cause buffer underrun during recording of the recording data, to thereby identify one or more recording speeds that can avoid the buffer underrun, and
- performing the test recording by use of one of the recording speeds that can avoid the buffer underrun.
6 more elements
A method of setting a recording speed of an optical disk, comprising:
- performing test recording on the optical disk at a given recording speed while changing a recording laser power level, and reproducing results of the test recording from the optical disk;
- measuring parameter values pertaining to reproduced signal quality based on the reproduced results;
- and
- determining, based on the parameter values, whether there is achieved any laser power level that can provide reproduced signal quality falling within a predetermined acceptable range,
- wherein when it is determined that there is achieved the laser power level that can provide reproduced signal quality falling within the predetermined acceptable range, said given recording speed is judged as a proper recording speed, while when it is determined that there is achieved no laser power level that can provide reproduced signal quality falling within the predetermined acceptable range, said given recording speed is judged as an improper recording speed, and one or more recording speeds judged as proper is displayed in such a manner that one of the displayed recording speeds can be set for use in actual recording based on a speed designating operation by a user.
2 more elements
A method of setting a recording speed of an optical disk, comprising:
- performing test recording on the optical disk while changing a recording speed and a recording laser power level, and reproducing results of the test recording from the optical disk;
- measuring parameter values pertaining to reproduced signal quality based on the reproduced results;
- and
- determining, based on the parameter values, whether there is achieved any laser power level that can provide reproduced signal quality falling within a predetermined acceptable range,
- wherein a recording speed achieving the laser power level that can provide reproduced signal quality falling within the predetermined acceptable range is judged as a proper recording speed, while another recording speed achieving no laser power level that can provide reproduced signal quality falling within the predetermined acceptable range is judged as an improper recording speed, and one or more recording speeds judged as proper is displayed in such a manner that one of the displayed recording speeds can be set for use in actual recording based on a speed designating operation by a user.
2 more elements
A method of setting a recording speed of an optical disk, comprising:
- performing test recording on the optical disk at a given recording speed while changing a recording laser power level, adn reproducing results of the test recording from the optical disk;
- measuring parameter values pertaining to reproduced signal quality based on the reproduced results;
- and
- determining, based on the parameter values, whether there is achieved any laser power level that can provide reproduced signal quality falling within a predetermined acceptable range,
- wherein when it is determined that there is achieved the laser power level that can provide reproduced signal quality falling within the predetermined acceptable range, said given recording speed is judged as a proper recording speed, while when it is determined that there is achieved no laser power level that can provide reproduced signal quality falling within the predetermined acceptable range, said given recording speed is judged as an improper recording speed, and one or more recording speeds judged as proper is stored onto a predetermined area of the optical disk, and wherein as the optical disk is re- loaded into an optical disk recording apparatus, information indicative of the recording speeds judged as proper is read out from the predetermined area and displayed in such a manner that one of the displayed recording speeds can be set for use in actual recording based on a speed designating operation by a user without a need for performing the test recording again.
2 more elements
A method of setting a recording speed of an optical disk, comprising:
- performing test recording on the optical disk while changing a recording speed and a recording laser power level, and reproducing results of the test recording from the optical disk;
- measuring parameter values pertaining to reproduced signal quality based on the reproduced results;
- and
- determining, based on the parameter values, whether there is achieved any laser power level that can provide reproduced signal quality falling within a predetermined acceptable range,
- wherein a recording speed achieving the laser power level that can provide reproduced signal quality falling within the predetermined acceptable range is judged as a proper recording speed, while another recording speed achieving no laser power level that can provide reproduced signal quality falling within the predetermined acceptable range is judged as an improper recording speed, and one or more recording speeds judged as proper is stored onto a predetermined area of the optical disk, and wherein as the optical disk is re- loaded into an optical disk recording apparatus, information indicative of the recording speeds judged as proper is read out from the predetermined area and displayed in such a manner that one of the displayed recording speeds can be set for use in actual recording based on a speed designating operation by a user without a need for performing the test recording again.
2 more elements
Dependencies are inferred from the claim text.