Optical disk identifying device, optical disk identifying method, optical disk recorder, and optical disk reproducing device

An optical disc discriminating method for discriminating plural sorts of optical discs in which data are recorded in a groove presenting a wobble or a land of an optical disc, said groove presenting the wobble indicating addresses, and in which the optical discs are of the same outer shape but differ in the recording capacity, said optical disc discriminating method comprising:

• a tracking error detecting step of focusing the light radiated to said optical disc rotationally driven by said rotational driving means, through a converging lens, on the data recorded on said groove of said optical disc, presenting the wobble, and detecting the tracking error signal of the light with respect to a mark recorded on said groove, presenting the wobble, on which the light has been focused;
• a total light volume detecting step of detecting a total light volume detecting signal of the mark recorded on said groove, presenting the wobble, from the reflected light from said groove, presenting the wobble, on which said light has been focused;
• and
• a discriminating step of discriminating the sorts of said optical discs based on phase comparison between a binary coded version of said tracking error signal detected by said tracking error detection step and a binary coded version of said total light volume signal as detected by said total light volume signal detection step.

An optical disc discriminating apparatus for discriminating plural sorts of optical discs in which data are recorded in a groove presenting a wobble or a land of an optical disc, said groove presenting the wobble indicating addresses, and in which the optical discs are of the same outer shape but differ in the recording capacity, said apparatus comprising:

• rotational driving means for rotationally driving said optical disc;
• optical means for converging radiated light by a focusing lens on said optical disc, rotationally driven by said rotational driving means, for focusing the so converged light on said optical disc;
• total light volume signal detection means for detecting a total light volume signal of a mark recorded on said groove, presenting the wobble, from the reflected light from said groove, presenting the wobble, on which the light has been focused by said optical means;
• comparator means for outputting the results of comparison which is based on an inherent slice level with respect to the total light volume signal as detected by said total light volume signal detection means;
• and
• discrimination means for discriminating the sorts of the optical discs in dependence on the results of comparison by said comparator means.

An optical disc discriminating method for discriminating plural sorts of optical discs in which data are recorded in a groove presenting a wobble or a land of an optical disc, said groove presenting the wobble indicating addresses, and in which the optical discs are of the same outer shape but differ in the recording capacity, said optical disc discriminating method comprising:

• a total light volume detecting step of focusing the light radiated to said optical disc rotationally driven by said rotational driving means, through a converging lens, on the data recorded on said groove of said optical disc, presenting the wobble, and detecting a total light volume signal of a mark recorded on said groove, presenting the wobble, on which the light has been focused;
• a comparing step of outputting the result of comparison which is based on a inherent slice level with respect to the total light volume signal as detected by said total light volume detecting step;
• and
• a discriminating step of discriminating the sorts of the optical disc in dependence on the results of comparison by said comparing step.

An optical disc discriminating apparatus for discriminating plural sorts of optical discs in which data are recorded in a groove presenting a wobble, said groove presenting the wobble indicating addresses, and in which the optical discs are of the same outer shape but differ in the recording capacity, said apparatus comprising:

• rotational driving means for rotationally driving said optical disc;
• optical block movement means for causing movement of an optical block having a converging lens to a predetermined area on said optical disc after focusing pull-in of light through said converging lens to said optical disc, rotationally driven by said rotational driving means;
• peak holding means for holding a peak level of a high frequency signal detected from said optical block moved by said optical block movement means to said predetermined area of said optical disc;
• bottom holding means for holding a bottom level of a high frequency signal detected from said optical block moved by said optical block movement means to said predetermined area of said optical disc;
• difference detection means for detecting the difference between the peak level as held by said peak holding means and the bottom level as held by said bottom holding means;
• and
• discriminating means for discriminating the sorts of the optical discs by comparing the magnitude of said difference as detected by said difference detection means to a threshold value.

An optical disc discriminating method for discriminating plural sorts of optical discs in which data are recorded in a groove presenting a wobble, said groove presenting the wobble indicating addresses, and in which the optical discs are of the same outer shape but differ in the recording capacity, said method comprising:

• an optical block movement step of causing movement of an optical block having a converging lens to a predetermined area on said optical disc, rotationally driven by rotational driving means, after focusing pull-in of light through said converging lens to said optical disc;
• a peak holding step of holding a peak level of a high frequency signal detected from said optical block moved by said optical block movement step to said predetermined area of said optical disc;
• a bottom holding step of holding a bottom level of a high frequency signal detected from said optical block moved by said optical block movement means to said predetermined area of said optical disc;
• a difference detection step of detecting the difference between the peak level as held by said peak holding step and the bottom level as held by said bottom holding step;
• and
• a discriminating step of discriminating the sorts of the optical discs by comparing the magnitude of said difference as detected by said difference detection step to a threshold value.

An optical disc recording apparatus for recording the information on optical discs of plural sorts in which data are recorded in a groove presenting a wobble or a land, said groove presenting the wobble indicating addresses, and in which the optical discs are of the same outer shape but differ in the recording capacity, said apparatus comprising:

• rotational driving means for rotationally driving said optical disc;
• optical means for converging the light for reading out data recorded in said wobble of said optical disc on said optical disc by a converging lens;
• tracking error detecting means for detecting a tracking error signal for said groove, presenting the wobble, from the light focused on said optical disc by said optical means and reflected back from said groove presenting the wobble;
• total light volume signal detection means for detecting a total light volume signal of a mark recorded on said groove, presenting the wobble, from the reflected light from said groove, presenting the wobble, on which the light has been focused by said optical means;
• and
• discriminating means for discriminating the sorts of said optical discs based on phase comparison between a binary coded version of said tracking error signal detected by said tracking error detection means and a binary coded version of said total light volume signal as detected by said total light volume signal detection means;
• wherein
• proper signal processing is selected based on the results of discrimination of the sorts of the optical discs by said discriminating means to record the information on the optical disc.

An optical disc discriminating apparatus for discriminating plural sorts of optical discs in which data are recorded in a groove presenting a wobble or a land of an optical disc, said groove presenting the wobble indicating addresses, and in which the optical discs are of the same outer shape but differ in the recording capacity, said apparatus comprising:

• rotational driving means for rotationally driving said optical disc;
• optical means for converging and focusing the radiated light by a converging lens on said disc rotationally driven by said rotational driving means;
• total light volume signal detection means for detecting a total light volume signal of a mark recorded on said groove presenting the wobble, from the light focused by said optical means on said groove presenting the wobble and reflected back from said groove presenting the wobble;
• comparing means for outputting the results of comparison which is based on an inherent slice level with respect to the total light volume signal as detected by said total light volume signal detection means;
• and
• discriminating means for discriminating the sorts of said optical discs based on the results of comparison by said comparison means;
• wherein
• proper signal processing is selected based on the results of discrimination of the sorts of the optical disc by said discriminating means to record the information on the optical disc.

An optical disc recording apparatus for recording the information on one of plural sorts of optical discs in which data are recorded in a groove presenting a wobble, or a land, said groove presenting the wobble indicating addresses, and in which the optical discs are of the same outer shape but differ in the recording capacity, said apparatus comprising:

• rotational driving means for rotationally driving said optical disc;
• an optical block movement means for causing movement of an optical block having a converging lens to a predetermined area on said optical disc after focusing pull-in of light through said converging lens to said optical disc, rotationally driven by said rotational driving means;
• peak holding means for holding a peak level of a high frequency signal detected from said optical block moved by said optical block movement means to said predetermined area of said optical disc;
• bottom holding means for holding a bottom level of a high frequency signal detected from said optical block moved by said optical block movement means to said predetermined area of said optical disc;
• difference detection means for detecting the difference between the peak level as held by said peak holding means and the bottom level as held by said bottom holding means;
• and
• discriminating means for discriminating the sorts of the optical discs by comparing the magnitude of said difference as detected by said difference detection means to said threshold value;
• wherein
• proper signal processing is selected based on the results of discrimination of the sorts of the optical disc by said discriminating means to record the information on the optical disc.

An optical disc reproducing apparatus for reproducing the information from one of plural sorts of optical discs in which data are recorded in a groove presenting a wobble or a land of the optical disc, said groove presenting the wobble indicating addresses, and in which the optical discs are of the same outer shape but differ in the recording capacity, said apparatus comprising:

• rotational driving means for rotationally driving said optical disc;
• optical means for converging the light for reading out data recorded in said wobble of said optical disc on said optical disc by a converging lens;
• tracking error detecting means for detecting a tracking error signal for said groove, presenting the wobble, from the light focused on said optical disc by said optical means and reflected back from said groove presenting the wobble;
• total light volume signal detection means for detecting a total light volume signal of a mark recorded on said groove, presenting the wobble, from the reflected light from said groove, presenting the wobble, on which the light has been focused by said optical means;
• and
• discriminating means for discriminating the sorts of said optical discs based on phase comparison between a binary coded version of said tracking error signal detected by said tracking error detection means and a binary coded version of said total light volume signal as detected by said total light volume signal detection means, wherein
• proper signal processing is selected based on the results of discrimination of the sorts of the optical disc by said discriminating means to reproduce the information from the optical disc.

An optical disc reproducing apparatus for reproducing the information from plural sorts of optical discs in which data are recorded in a groove presenting a wobble or a land of an optical disc, said groove presenting the wobble indicating addresses, and in which the optical discs are of the same outer shape but differ in the recording capacity, said apparatus comprising:

• rotational driving means for rotationally driving said optical disc;
• optical means for converging radiated light by a focusing lens on said optical disc, rotationally driven by said rotational driving means, for focusing the so converged light on said optical disc;
• total light volume signal detection means for detecting a total light volume signal of a mark recorded on said groove, presenting the wobble, from the reflected light from said groove, presenting the wobble, on which the light has been focused by said optical means;
• comparator means for outputting the results of comparison which is based on an inherent slice level with respect to the total light volume signal as detected by said total light volume signal detection means;
• and
• discrimination means for discriminating the sorts of the optical discs in dependence on the results of comparison by said comparator means;
• wherein
• proper signal processing is selected based on the results of discrimination of the sorts of the optical discs by said discriminating means to reproduce the information from the optical disc.

An optical disc reproducing apparatus in which data are recorded in a groove presenting a wobble or a land, said groove presenting the wobble indicating addresses, and in which the optical discs are of the same outer shape but differ in the recording capacity, said apparatus comprising:

• rotational driving means for rotationally driving said optical disc;
• an optical block movement means for causing movement of an optical block having a converging lens to a predetermined area on said optical disc after focusing pull-in of light through said converging lens to said optical disc, rotationally driven by said rotational driving means;
• peak holding means for holding a peak level of a high frequency signal detected from said optical block moved by said optical block movement means to said predetermined area of said optical disc;
• bottom holding means for holding a bottom level of a high frequency signal detected from said optical block moved by said optical block movement means to said predetermined area of said optical disc;
• difference detection means for detecting the difference between the peak level as held by said peak holding means and the bottom level as held by said bottom holding means;
• and
• discriminating means for discriminating the sorts of the optical discs by comparing the magnitude of said difference as detected by said difference detection means to a threshold value;
• wherein
• proper signal processing is selected based on the results of discrimination of the sorts of the optical disc by said discriminating means to record the information on the optical disc.