Optical recording method, optical recording medium, optical recording medium recording device, optical recording device, optical disk, optica disk recording/reproducing device

An optical recording medium recording apparatus for forming and recording on an optical recording medium a mark corresponding to data having a length nT (n being an integer equal to or greater than 3 and T being a clock period) by modulating the laser power of an irradiating laser beam with three values of recording power Pw, erase power Pe, and bias power Pb (where Pw>Pe>Pb), comprising:

• means for setting constant strength periods of the recording power Pw as AtT, A1T, . . . and AmT;
• means for setting constant strength periods of the bias power Pb as BtT, B1T, . . . , BmT, and CT (C=−1 to 3);
• and
• means for dividing the application of the irradiating laser beam into pulses in order of AtT, BtT, A1T, B1T, . . . , AmT, BmT, and CT (m=(n−k)/2, k=3 (if n is an odd number), or k=4 (if n is an even number)) (where the constant strength period At of the recording power Pw for n=3, n=4, n≧5 (odd number), and n≧6 (even number) is set as At3, At4, Atod, and Atev (“od” indicating an odd number and “ev” indicating an even number), the constant strength period of the bias power Pb for n=3, n=4, n≧5 (odd number), and n≧6 (even number) is set as Bt3, Bt4, Btod and Btev, and then, At3+Bt3=Atod+Btod=Am+Bm=2T and At4+Bt4=Atev+Btev=3T).

An optical recording medium recording apparatus for forming and recording on an optical recording medium a mark corresponding to data having a length nT (n being an integer equal to or greater than 3 and T being a clock period) by modulating the laser power of an irradiating laser beam with three values of recording power Pw, erase power Pe, and bias power Pb (where Pw>Pe>Pb), comprising:

• means for setting constant strength periods of the recording power Pw as AtT, A1T, . . . and AmT;
• means for setting constant strength periods of the bias power Pb as BtT, B1fT, B1eT, . . . BmfT, BmeT, and CT (C=−1 to 3) (“f” indicating just before any one of intermediate pulses 1 . . . m and “e” indicating just after the intermediate pulse);
• and
• means for dividing the application of the irradiating laser beam into pulses in order of AtT, BtT, B1fT, A1T, B1eT, . . . , BmfT, AmT, BmeT, and CT (m=INT((n−k)/3), where K=3, 4 or 5 and INT is a conversion into an integer closer to 0 and m is the number of the intermediate pulses) (where the constant strength period At of the recording power Pw for n=3, n=4, n=5, n≧6 (n=3l), n≧7 (n=3l+1), and n≧8 (n=3l+2) with l being a natural number is set as At3, At4, At5, At0, At1, and At2, the constant strength period of the bias power Pb for n=3, n=4, n=5, n≧6 (n=3l), n≧7 (n=3l+1), and n≧8 (n=3l+2) is set as Bt3, Bt4, Bt5, Bt0, Bt1, and Bt2, and then, At3+Bt3=At0+Bt0=2T, At4+Bt4=At1+Bt1=Bmf+Am+Bme=3T, and At5+Bt5=At2+Bt2=4T).

An optical recording apparatus for forming a mark corresponding to data having a length nT (n being an integer equal to or greater than 3 and T being a clock period) by modulating the laser power of an irradiating laser beam with three values of recording power Pw, erase power Pe, and bias power Pb (where Pw>Pe>Pb), comprising:

• determination means for determining whether the data of length nT is odd or even;
• top pulse generation means for generating a top pulse among recording pulses representative of the data from a short width pulse if a determination result of the determination means is odd, and if the determination result is even, generating the top pulse from a pulse whose width is longer than that of the odd case;
• and
• multi-pulse generation means for generating multi-pulses with the number m of constant strength pulses of the recording power Pw being m=(n−k)/2, where k=2 (if n=2), k=3 (if n is an odd number), or k=4 (if n is an even number).

An optical recording apparatus for forming a mark corresponding to data having a length nT (n being an integer equal to or greater than 3 and T being a clock period) by modulating the laser power of an irradiating laser beam with three values of recording power Pw, erase power Pe, and bias power Pb (where Pw>Pe>Pb), comprising:

• determination means for determining whether the length nT of a recording signal corresponding to the mark is odd or even;
• top pulse generation means for generating a top pulse among recording pulses representative of the data from a short width pulse if a determination result of the determination means is odd, and if the determination result is even, generating the top pulse from a pulse whose width is longer than that of the odd case;
• multi-pulse generation means for generating multi-pulses with the number m of constant strength pulses of the recording power Pw being m=(n−k)/2, where k=2 (if n=2), k=3 (if n is an odd number), or k=4 (if n is an even number);
• and
• phase control means for controlling, for recording pulses corresponding to any mark having a length nT (n≧5) and sequentially consisting of a top pulse, intermediate pulses, and a rear-end pulse, phases of intermediate pulses by shifting by 1T a phase of intermediate pulses among recording pulses representative of a mark whose n is an odd number equal to or greater than 5 from a phase of intermediate pulses among recording pulses representative of a mark whose n is an even number equal to or greater than 6.

An optical recording apparatus for forming a mark corresponding to data having a length nT (n being an integer equal to or greater than 2 and T being a clock period) by modulating the laser power of an irradiating laser beam with three values of recording power Pw, erase power Pe, and bias power Pb (where Pw>Pe>Pb), comprising:

• determination means for determining whether n of the data length nT is n=3l, n=3l+1, or n=3l+2 (l being a natural number);
• top pulse generation means for generating a top pulse among recording pulses representative of the data from a short width pulse if a determination result of the determination means is n=3l, generating, if the determination result is n=3l+2, the top pulse from a pulse whose width is longer than that of the case of n=3l, and generating, if the determination result is n=3l+1, the top pulse from a pulse whose width is longer than that of the case of n=3l and shorter than that of the case of n=3l+2;
• and
• multi-pulse generation means for generating multi-pulses with the number m of constant strength pulses of the recording power Pw being m=INT((n−3)/3), where INT is a conversion into an integer closer to 0.

An optical recording apparatus for forming a mark corresponding to data having a length nT (n being an integer equal to or greater than 2 and T being a clock period) by modulating the laser power of an irradiating laser beam with three values of recording power Pw, erase power Pe, and bias power Pb (where Pw>Pe>Pb), comprising:

• determination means for determining whether n of the data length nT is n=3l, n=3l+1, or n=3l+2 (l being a natural number);
• top pulse generation means for generating a top pulse among recording pulses representative of the data from a short width pulse if a determination result of the determination means is n=3l, generating, if the determination result is n=3l+2, the top pulse from a pulse whose width is longer than that of the case of n=3l, and generating, if the determination result is n=3l+1, the top pulse from a pulse whose width is longer than that of the case of n=3l and shorter than that of the case of n=3l+2;
• multi-pulse generation means for generating multi-pulses with the number m of constant strength pulses of the recording power Pw being m=INT((n−3)/3), where INT is a conversion into an integer closer to 0;
• and
• phase control means for shifting a phase of multi-pulses by 1T between n=3l, n=3l+1, and n=3l+2 (l being a natural number) of the data of length nT (n≧6).

An optical recording method of forming a mark corresponding to data having a length nT (n being an integer equal to or greater than 3 and T being a clock period) by modulating the laser power of an irradiating laser beam with three values of recording power Pw, erase power Pe, and bias power Pb (where Pw>Pe>Pb), comprising:

• employing heating pulses used for data of a minimum length 3T up to data of a length (2+p)T (p being the period ratio of a multi-pulse to a recording clock) as base pulses;
• adding a period of heating pulses selected from 3T up to (2+p)T to a top portion of a recording strategy for data of a length nT longer than (2+p)T;
• and
• if the period of a succeeding multi-pulse is 1/p of the recording clock, setting the number of data pieces from 3T up to (2+p)T as p, thereby creating the recording strategy for the data of the length nT.

An optical recording method of forming a mark corresponding to data having a length nT (n being an integer equal to or greater than 3 and T being a clock period) by modulating the laser power of an irradiating laser beam with three values of recording power Pw, erase power Pe, and bias power Pb (where Pw>Pe>Pb), comprising:

• employing heating pulses used for data of a minimum length 3T up to data of a length (2+p)T (p being the period ratio of a multi-pulse to a recording clock) as base pulses;
• adding a period of heating pulses selected from 3T up to (2+p)T to a top portion of a recording strategy for data of a length nT longer than (2+p)T;
• and
• adjusting the phase of a succeeding multi-pulse whose period is 1/p of the recording clock to the added heating pulses at the top portion, thereby adjusting the phase relationship of a trailing edge waveform of the recording strategy for the data.

An optical disk recording/reproducing apparatus for recording and reproducing an optical disk, the optical disk being for recording information with a laser beam emitted from an optical pickup and having an information management area and an information recording area, the recording area including blocks serving as recording/reproducing units and involving a block having two block addresses and a block having a block address and management information, the information management area storing, in a plurality of recording management information sections corresponding to multiplied-speed information, recording power and recording strategy information used to store information in the information recording area, as well as linear speed information used to record information on the optical disk, the recording strategy information specifying a recording clock to be used for a low linear speed among compatible linear speeds of the optical disk and a frequency-divided clock of the recording clock to be used for a high linear speed among the compatible linear speeds, wherein:

• the apparatus reads a necessary one from among a plural pieces of the recording power and recording strategy information stored in the plurality of recording management information sections in the information management area, and according to the read information, sets recording power and a recording strategy and records information in the information recording area.

An optical recording medium having a structure to record data with the use of an optical recording method of forming a mark corresponding to data having a length nT (n being an integer equal to or greater than 3 and T being a recording data clock period) by modulating the laser power of an irradiating laser beam with three values of recording power Pw, erase power Pe, and bias power Pb (where Pw>Pe>Pb) with the use of a recording strategy employing as a base period a clock obtained by dividing the frequency of the recording data clock period T by 2, the method adjusting time of the clock period T according to the length of recording data of the frequency-halved period by forming a mark with divided recording pulses so that a 3T mark is formed with a top pulse having a length T3, a section dT3 for adjusting the length of the top pulse, and a rear-end cooling power section 3Tcl, an odd or even mark equal to or longer than 4T is formed with a multi-pulse period Tmp obtained by halving the frequency of a recording clock, an even mark is formed with three time sections, i.e., a bias power section “(2T−Tmp)−eTdlp1” before a rear-end recording pulse, a rear-end recording pulse section “Tmp−eTdlp2,” and a cooling power section eTcl, and an odd mark is formed with three time sections, i.e., a bias power section “(2T−Tmp)+oTdlp1” before a rear-end recording pulse, a rear-end recording pulse section “Tmp+oTdlp2,” and a cooling power section oTcl.

An optical disk for recording information with a laser beam emitted from an optical pickup and having an information management area and an information recording area, comprising:

• the information management area storing recording power and recording strategy information used to store information in the information recording area, as well as linear speed information used to record information on the optical disk, the recording strategy information being used when forming, at a linear speed compatible with the optical disk, a mark corresponding to data having a length nT (n being an integer and T being a recording data clock period) by modulating the laser power of the laser beam with three values of recording power Pw, erase power Pe, and bias power Pb (where Pw>Pe>Pb);
• the recording strategy information including a recording strategy employing the clock period T as a base period to be used for a low linear speed and being capable of adjusting the recording strategy according to the clock period T by changing three time sections among divided recording pulses for forming a mark, i.e., a top recording pulse width, an intermediate multi-pulse width, and a rear-end cooling power section;
• the recording strategy information including a recording strategy employing a period pT obtained by dividing the frequency of the clock period by p as a base period to be used for a high linear speed and being capable of adjusting the recording strategy according to the period pT by changing three time sections among divided recording pulses for forming a mark, i.e., a bias power section before a rear-end recording pulse, a rear-end recording pulse section, and a cooling power section;
• and
• the recording strategy information being beforehand stored in a plurality of recording management information sections corresponding to multiplied-speed information.

An optical disk for recording information with a laser beam emitted from an optical pickup and having an information management area and an information recording area, comprising:

• the information management area storing recording power and recording strategy information used to store information in the information recording area, as well as linear speed information used to record information on the optical disk, the recording strategy information being used when forming, at a linear speed compatible with the optical disk, a mark corresponding to data having a length nT (n being an integer and T being a recording data clock period) by modulating the laser power of the laser beam with three values of recording power Pw, erase power Pe, and bias power Pb (where Pw>Pe>Pb);
• the recording strategy information including a recording strategy employing the clock period T as a base period to be used for a low linear speed and being capable of adjusting the recording strategy according to the clock period T by changing three time sections among divided recording pulses for forming a mark, i.e., a top recording pulse width, an intermediate multi-pulse width, and a rear-end cooling power section;
• the recording strategy information including a recording strategy employing a period 2T obtained by dividing the frequency of the clock period by 2 as a base period to be used for a high linear speed and being capable of adjusting the recording strategy according to the period 2T by changing, according to even or odd number data, three time sections among divided recording pulses for forming a mark, i.e., a bias power section before a rear-end recording pulse, a rear-end recording pulse section, and a cooling power section;
• and
• the recording strategy information being beforehand stored in a plurality of recording management information sections corresponding to multiplied-speed information.

For an optical disk for recording information with a laser beam emitted from an optical pickup and having an information management area and an information recording area, in which:

• the information management area stores recording power and recording strategy information used to store information in the information recording area, as well as linear speed information used to record information on the optical disk, the recording strategy information is used when forming, at a linear speed compatible with the optical disk, a mark corresponding to data having a length nT (n being an integer and T being a recording data clock period) by modulating the laser power of the laser beam with three values of recording power Pw, erase power Pe, and bias power Pb (where Pw>Pe>Pb);
• the recording strategy information includes a recording strategy employing the clock period T as a base period to be used for a low linear speed and is capable of adjusting the recording strategy according to the clock period T by changing three time sections among divided recording pulses for forming a mark, i.e., a top recording pulse width, an intermediate multi-pulse width, and a rear-end cooling power section;
• the recording strategy information includes a recording strategy employing a period pT obtained by dividing the frequency of the clock period by p as a base period to be used for a high linear speed and is capable of adjusting the recording strategy according to the period pT by changing, according to the period pT, three time sections among divided recording pulses for forming a mark, i.e., a bias power section before a rear-end recording pulse, a rear-end recording pulse section, and a cooling power section;
• and
• the recording strategy information is beforehand stored in a plurality of recording management information sections corresponding to multiplied-speed information, an optical disk recording/reproducing apparatus for recording/reproducing information to and from the optical disk, comprising:
• means for reading a necessary one from among a plural pieces of the recording power and recording strategy information stored in the plurality of information management sections of the optical disk, and according to the read recording power and recording strategy, recording information in the information recording area of the optical disk.

For an optical disk for recording information with a laser beam emitted from an optical pickup and having an information management area and an information recording area, in which:

• the information management area stores recording power and recording strategy information used to store information in the information recording area, as well as linear speed information used to record information on the optical disk, the recording strategy information is used when forming, at a linear speed compatible with the optical disk, a mark corresponding to data having a length nT (n being an integer and T being a recording data clock period) by modulating the laser power of the laser beam with three values of recording power Pw, erase power Pe, and bias power Pb (where Pw>Pe>Pb);
• the recording strategy information includes a recording strategy employing the clock period T as a base period to be used for a low linear speed and is capable of adjusting the recording strategy according to the clock period T by changing three time sections among divided recording pulses for forming a mark, i.e., a top recording pulse width, an intermediate multi-pulse width, and a rear-end cooling power section;
• the recording strategy information includes a recording strategy employing a period 2T obtained by dividing the frequency of the clock period by 2 as a base period to be used for a high linear speed and is capable of adjusting the recording strategy according to the period 2T by changing, according to even or odd number data, three time sections among divided recording pulses for forming a mark, i.e., a bias power section before a rear-end recording pulse, a rear-end recording pulse section, and a cooling power section;
• and
• the recording strategy information is beforehand stored in a plurality of recording management information sections corresponding to multiplied-speed information, an optical disk recording/reproducing apparatus for recording/reproducing information to and from the optical disk, comprising:
• means for reading a necessary one from among a plural pieces of the recording power and recording strategy information stored in the plurality of information management sections of the optical disk, and according to the read recording power and recording strategy, recording information in the information recording area of the optical disk.